CHANGES
IN THE AVERAGE WEIGHT
AND CATCH PER UNIT EFFORT OF TUNAS
TAKEN FROM PAPUA NEW GUINEA WATER.S
R.A. Watson
Report No.84-03
STORED ON DOCUMENT DISKETTE V: TUNA.DOC
1
ABSTRACT
Average
pole-and
weight of skipjack and yellowf in from the
line
four
years
significantly
domestic
fisher 1 oscillated in synchrony with a period
and the weights of
from 1970 to 1981.
both
species
Although there
of
decreased
were some
significant changes in average tuna weight between years, there
were no observable trends for the Japanese longline, or Japanese
and American purse-seine fisheries. The annual average weight of
yellowf in from the domestic pole-and-line fishery is between 2
and 3kg,
from the Japanese purse-seine 5kg and from the Japanese
longline
between
from
23 and 26kg.
The average weight of
the domestic pole-and-line and Japanese
skipjack
purse-seine
catch
was between 2 and 3kg.
The
CPUE
followed
were
that
out
of
observable
of
of
skipjack
from
the
Japanese
of the domestic fishery but the
phase.
No
long term
trends
pole-and-line
yellowf in
in
CPUE
f or the purse-seine or longline fisheries.
ski.pjack and yellowfin from the Japanese and American
seine
fisheries
were
comparable
for
CPUEs
are
yet
The CPUE
purse-
1982.
Best CPUE of domestic pole-and-line sk~pjack o ccured when
average sizes were greatest but the converse' was true for
yellowfin.
Generally in the various fisheries when the CPUE of
skipjack increased, that of yellowf in decreased.
INTRODUCTION
Tuna are one of Papua New Guinea's CP.N.G's) major resources
and an important source of foreign exchange.
It was reported by
Kleiber
et
al. (1983) of the South Pacific Commission
(S.P.C.)
that the tuna resources of the central and western Pacific states
were
underexploited.
concern
Recently,
however,
there has been
voiced that despite the general underutilization of
some
the
resource, fish i ng effort in a particular area may reach very high
levels
causing
local overexploitation.
This concern has
exacerbated by the increasing numbers of efficient
been
purse-seiners
2
which
have
entered
Papua New Guinea's
fishing
zone
fishing
industry
have
y e ~r s.
during the last five
L•f
Representatives
suggested
declared
the
Japanese
that the average size of tuna and hence the
There
is
fishery
concern
the western Pacific region that there is
increasing
competition
by
the
same
resources.
Major
between P.N.G's fisheries
could
the
different
interaction
tuna
years.
of
the · P.N.G.
in
has decreased in recent
value
fisheries
for
endanger the resource both biologically and economically.
The
tuna
their
since
industries of P.N.G.
initial
commercial
including Kearney et al.
have
(1972),
have been
under
development.
Lewis et al.
~
~-
scrutiny
Many
reports
(1974) and
others
examined biological aspects of the fishery while work
recently
by
Doulman
& Wright (1982) has included
an
done
economic
analysis as well.
This report attempts to collate data from various sources on
the
average
examine
weight and catch per unit of effort
of
tunas
this data for significant changes and trends.
and
Analysis
o : changes in an array of overlapping multi-species fisheries
d i Zficult
'. _ca use
because
the
necessary
data is ha!d
to
obtain
the degree of interaction between the di f ferent
is
and
species
and fisheries is almost impossible to assess at any gi ve n time.
It
was
originally
assessment
of
fisheries,
with
the
an
hoped that this study
degree of interaction
would
between
allow
the
various
emphasis on its effects on yellowf in
Thunnus albacares (Bonnaterre).
Detailed records,
an
tuna,
however, are
only available for the Japanese pole-and-line fishery since 1972,
the
Japanese purse-seine and longline fisheries since
the domestic pole-and-line fishery from 1970 to 1981.
1979
There has
been
a limited number of years when several tuna fisheries
been
operating
together
and an examination
of
the
effects of possible interactions is not yet possible.
and
have
long-term
3
METHODS AND MATERIALS
DATA SOURCES
Domestic Pole-and-Line
Data forms were completed as the catch was unloaded in port.
This data was added to the "LE" data base system maintained on an
ICL mainframe computer located at the National Computer Centre
(N.C.C.), Port Moresby. Summaries were compiled and printed from
this
data base and the tables in this report were calculated and
summarised from these.
Japanese Pole-and-Line
The
Japanese
summarised
(1980).
pole-and-line
from S.P.C.
tuna data was
calculated
and
Skipjack Programme Technical Report No.2
_ ·' p anese Longline
•
The Japanese Fishing Federation sent standardised catch
report forms directly to the Department of Primary Industry
(D.P.I.). These forms were logged and archived. Duplicates were
forwarded to the S.P.C. where they were added to a data base on
an HPlOOO computer.
Periodically or on demand, summaries were
sent to D.P.I.
Tables in this report were calculated from these
summaries.
(1981),
Research
S.P.C's
Skipjack
Programme Technical
Report
No.3
which was calculated from annual reports produced by the
Department of the Fisheries Agency of
records of the numbers of longline tuna taken.
Japan,
provided
4
Purse-Sein ~
J a2 a nese
As
with the
!on ~
.ne,
forms are sent f r om Japan to
D.P.I.
Though
duplicates were f o rwarded to the S.P.C.
above,
this data was also added to a D.P.I. data base maintained
on ECS4500 microcomputers.
addition
and processed a s
Summaries were produced by D.P . I. in
to those forw a rded by the S.P.C.
Data from the D.P.I.
summaries were used to prepare the tables in this report.
American Purse-Seine
The
American
Tunaboat Owners'
Association
CA.T.A.)
sent
statistical reports for 1982 from which the tables in the present
report were calculated.
PREPARATION OF TABLES
Data from the sources above was used by Supercalc, a spread·-· "!et programme, to produce additional calculations.
These forms ·
we r e than formatted and printed using Wordstai:: , a word-processing
•
programme. A large number of tables were prepared which were not
directly referred to in this text but which nevertheless might be
of some future use to biologists and economists.
tables are included in a second set of appendices.
These
extra
Annual averages are the mean of all data on a "trip by trip"
basis
and
averages.
is
based
do
not necessarily equal the
of
the
monthly
When differences are referred to as "significant" this
on
a
2-way
analysis
of
otherwise
bar
mean
variance
Cp<.05)
unless
described.
Points on figures have either a vertical
(95% confidence limits) or an open circle (confidence limits
ve r y large or impossible to calculate).
5
RESULTS AND
Discu ~
AVERAGE WEIGHT
Dome s tic Pole-and-Line
'I'h e
average we ight of yellowfin
(Linnaeus),
p e lamJ s
Table 1.
for
and
skipjack,
Katsuwonu s
each month of the fishery appears
in
There was no significant monthly effect on the size of
eith e r species of tuna.
Monthly estima tes were combined to give
ann ua l averages with 95% confidence l imits.
The
annual
average weight of yellowf in and
skipjack
1970 to 1 981 (currently the last year of operation) were
(Figs.la
and 2a).
oscilla te
du r ing
a p p r oximately
19 7 6
and
d e c reas e d
yea r.
the
course of the fishery with
a
p er iod
Smallest fish were caught
Overall,
the
of
in
1972,
both
tunas
average weight
of
the
Yellowf in
were
about l-2kg heavier than skipjack caught the
same
significantly
c o nsistently
plotted
The a v erage weight of both tunas appeared to
four years.
1980.
from
during
fishery.
The o s cillating nature of the pole-and-line fish may have
YeSu l ted
from long - term weather cycles or from the migration
of ·
d ifferQ r ent sized fish schools.
Japanese Longline
The mont h ly average size of yellowfin,
bigeye, and albacore
in t h e j a pan e s e longline catch appear in Table 2.
Skipjack
did
not f orm an important proportion of the catch so their sizes were
not included.
of
There was no significant monthly change in the average
size
yellowf in so the monthly estimates were combined to form
the
annual
estimates plotted in Fig.
reduction
in
Ct - test,
p<.05)
estima tes
for
itself
as
la.
There was a
the annual average weight of
from
1980
to
1981
and
1983 indicate that this trend
significant
longline
1982.
may
yellowf in
Preliminary
be
the average weight was intermediate between
1980 and 1981 (Table 2a).
reversing
that
of
6
Table 1.
Average weight of fi h
i'
kg ) in domestic pole-and-line fishery
(a)
Skipjack
_,
YE.AR
JAN
FEB
MAR
APR
SEP
MAY
OCT
10.4
1970
NOV
DEC
AVG
4.1
4.3
5.7
1971
10.B
6. 7
7.1
7.5
7.0
9.6
4.3
4.4
4.1
4.1
3.B
3.6
5.~
1972
4.2
3.8
3.0
2.9
2.B
3.6
3.1
3.6
3.2
2.9
2.8
2.8
3.1
1973
3.1
3.3
3.2
3.3
3.3
3.3
3.1
3.1
3.2
3.2
3.1
3.5
3.2
1974
3.5
3.1
3.3
3.5
3. 7
3.5
3.5
3. 7
3.6
3.5
3.4
3.5
3.5
1975
3.3
3.4
3.6
2.B
3.6
3.B
3.6
3.4
3.5
3.3
3.0
3.0
3.4
1976
2.0
2.2
2.1
2.1
2.3
2.5
2.7
2.7
2.6
2.5
2. 7
2.4
2.5
1977
2.4
2.6
2.6
2. 7
3.0
3.2
2. 7
3.0
3.0
3.1
2.9
3.0
2.9
1978
3.4
3.4
2.4
2.8
3.3
3.4
3.4
3.3
3.3
3.1
3.0
3.0
3.2
1979
2.8
2.7
2.9
3.0
3.0
3.0
3.0
3.0
3.1
2.8
2.2
1.8
2.9
1980
2.5
2. 7
1.6
1.7
1.9
2.4
2.8
2.5
2.4
2.3
2.5
2.5
2.3
1981
2.3
2.B
2.3
2.9
3.5
3.1
3.2
2.4
2.3
2.4
2.7
2.3
2.B
NOV
DEC
AVG
7.2
7.6
5.6
(b)
FEB
YEAR
1970
MAR
APR
MAY
Yellowfin
JUN
JUL
AUG
5.4
1971
14.1
6.3
13.2
12.0
5.4
4.3
6.1
7.0
4.6
5.1
3.2
2.1
5.4
1972
2.3
3.6
3.4
2.7
2.7
4.5
3.2
4.5
5.0
4.5
4.1
3.8
3.7
1973
4.0
5.0
4.B
2.9
4.5
5.4
4.6
4.2
4.1
5.3
5.2
4.3
4.6
1974
4.9
3.5
4.2
3.5
3.8
4.1
3.8
4.4
3.5
4.8
4.9
4.4
4.1
1975
3.3
2.7
2.5
3.4
3.0
2.B
2.8
2.5
3.3
3.2
3.1
4.3
3.2
1976
2.0
2.0
2.4
2.4
2.7
2.7
2.6
2.7
2.9
2.8
3.2
2.8
2. 7
1977
3.0
3.0
3.2
3.2
3.0
3.4
3.1
3.5
3.1
3.5
3.B
3.6
3.3
1978
3.7
3.1
3.2
3.4
3.3
3.4
2.9
2.8
3.1
3.1
3.1
3.0
3.2
1979
2.9
3.1
3.3
2.8
3.0
2.6
2.6
2.6
2.6
Z.9
Z.6
Z.5
Z.6
1980
2.9
2.2
1.5
1.5
1.9
1.9
2.7
2.7
2.5
2.3
2.9
2.6
2.0
1981
2.6
4.1
2.9
2.B
2.B
2.9
2.4
2.4
2.2
2.6
3.3
2.9
2. 7
prepared from National Computer Centre "LE" data set
7
Figure 1.
i
(a)
27
26
25
YELLOWFIN
AVERAGE WEIGHT (KG)
DOM . POLE-ANO-LINE
24
l!J
x
l1
d \
I
-
\
JAP.LONGLINE
JAP.PURSE-SEINE
23
22
I-
:x::
l.!J
7
w
6
.....
3
w
l!J
<
o. ....I .·I· .. ·I
5
a::
4.
>
3
w
<:
2
70 71 72 73 74 75 76
(b)
>c(
0
YEAR
1.1
I-
c(
VI
0
en
t:l.:
:¥'.'.
1. 0
0
""0
.9
I
0
0
I
•I
UJ
1g
~:I:
z
.....
.....
z
I
.5
c(
c(
z
. 4.
llJ
_J
0
a..
Z
LU
I
,....
LU - I
- I l!J
oz
0.0
•
...I
n.: :i::::
Cl:
c(
-,
Oc(
o.....,
C.P. U.E.
:::>
u..
v'l
II\
w
w
"
::::>
Vl
Q
A•
.6
0
I
Vl
-l
.7
0
-I
IUJ
.6
I
I
82
UJ
I
I
_J
77 7 8 7 9 80 81
•
•I \•
I
• \•
I
•
'•
.3
.2
'~,
.y· \i
.1
70 71
I-
:I:
72 73 74 75 76
'~~~t
~x
14 •.
UJ
12 z ......
;:;:; lJJ
10 VI ~
I
Q
...
UJ
..
77 78 79 80 81
lJJ
z
lJJ
l/)
8 ::Q
a::
6 ~
a..
4 <
--.
:l.:
:::> ::)
°':
c(
82
YEAR
Fig. 1.
Yellowfin annual averages in various fisheries
(a)
Fish weight (kg)
(b)
Catch (t) per unit effort
8
Figure 2.
(a)
SKIP JACK
AVERAGE WEIGHT (KG)
- - DOM.POLE - AND - LI NE
---- JAP. PURSE-SEINE
8
~
lC
7
II
l:J
6
......
UJ
3
UJ
l!J
<{
0::
5
4
3
w
3<
2
>-
<{
70
(b)
0
71
72 73 74
'-··
....r,
75 76 77 78 79 80
I-
81 82
YEAR
VI
_J
22 ~
0
ro
I-
:
I
llJ
z
.....
_J
l.LJ
....
_J
I
0
I
I
0
n. a..
0.: l:
<(
20 ~
u
18 ~
.
16 ;:::
8
z
llJ UJ
_J
-'
VI
'
VI
<(
0
(j
g
:z
z <{
0
.·a· .p
..Q.
C.P.U. E.
:l:
•
I
•
UJ
0
., 0
l:
I'•
.x
• '•' '
7
6
14 :
•'
s
12 ;
UJ UJ
Zz
10 ..........
UJ UJ
4
8
VI VI
3
6
VI
2
<t:: :I:
I
I
UJ UJ
l/)
ex: ex:
::'.) ::'.)
4 a.. a.
a.: .
2
70 71
Fig. 2.
72 73 74 75 76 77 78 79 80 81
YEAR
-.. <{
82
Skipjack annual averages in various fisheries
(a)
Fish weight (kg)
(b)
Catch (t) per unit effort
9
Table 2.
Average weight of fi s h (kg) in Japanese longl lne fishery
Yellow fin
(a)
YEAR
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
1979
SEP
OCT
NOV
DEC
AVG
22.5
23.9
26.5
22.7
24.3.
1980
22.0
24.0
24.5
211.6
25. 7 26.8
?7 . 1 27.7
27.0
28.3
27.0
26.1
26.1
1981
25.3
24.7
21.6
20.2
22.0
21.5
20.6
22.6
22.2
25.6
24.6
27.0
23.l
1982
24.5
21~. 7
24.1
22.6
21.l
21.0
21.2
21.9
21.9
24. 7
26.3
24.9
23.0
19 03
24.3
24.1
24.9
23.9
23.9
25.9
26.6
(b)
24.5
Albacore
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
AVG
13.l
14.3
12.5
14.3
15.3
16.l
17.1
16.6
14.5
15.1
14.6
13.8
14.7
14.6 15.0
14.7
15.4
13.2
17.5
18.5
16.2
16.4
16.0
16.l
13. 7 15.9
1? 82
13. 6 14.4
15.6
20.4
16.0
14.9
15.6
18.0
15.7
15.4
J.5. 7
15.3
1983
13. 2 16.0
17.3
17.7
19.9
20.4
22.0
.r.E_l\B.
•
1
79
"l
(c)
YEAR
JAN
FEB
MAR
APR
MAY
JUN
16.4
19 . 7
Bigeye
JUL
AUG
1979
SEP
OCT
NOV
DEC
23.8
23.3
26.6
26.0
21~.
AVG
8
1980
25.4
27.5
27.7
28 . 8 27.8
29.5
29. 7 30.l
29.7
29.6
28.5
28.9
28.4
1981
28.3
28.3
29 .8
27.8
28.1
27.1
27.7
23.6
24.2
30.5
27.3
26.5
27.7
1982
27.5
26.9
29.2
29.8
27.6
25.0
24.3
25.6
26.4
27.0
27.6
27.5
27.2
1983
28.2
27.2
27 .2
25.6
28.3
27.7
28.5
calculated fr om SPC sunmaries
27.4
10
Japanese Purse-Seine
The monthly average weight of yellowf in and skipjack
in
Table
average
3.
There was no significant effect of month
weight of these tunas.
on
Monthly estimates were used
produce annual estimates plotted in Figs.
been
appear .
la and 2a.
the
to
There has
no significant change in average weight Ct-test,
p<.05) in
either tuna from 1979 to 1982.
The
average weight of purse-seine skipjack did
significantly Ct-test,
not
differ
p<.05) from those caught by pole-and-line
(Fig. 2a).
American Purse-Seine
The
only
n
s
~
statistical reports submitted by the
estimates
averages.
li lar
to
A.T.A.
contained
of weight ranges for yellowf in and skipjack
The monthly estimates prepared from
these
but
were
the Japanese reports but were not used because
they ·
were much more variable.
CATCH PER UNIT EFFORT CCPUE)
Domestic Pole-and-Line
~kipjack
Measurement of CPUE in tonnes per boat day for both
and yellowf in appears in Table 4.
lb and 2b.
p<.05)
This data is plotted in Figs.
Yellowfin catches were significantly higher Ct-test,
in
1976
than during the previous or
subsequent
years.
Catches were highest in 1972 and 1976, these were both years wh e n
the
average
catches
yellowfin was lightest
of skipjack (Fig.
(Fig.
la).
In
contrast,
2b) increased and decreased with
the
average weight of the fish; 1974 and 1978 were peak years.
Catch
generally
per unit effort for both skipjack and yellowfin
cyclical,
with
a period of four years,
were
however, the
11
Table 3.
Average weight of fish (kg) in Japanese purse-seine fishery
Skipjack
(a)
YEAR
JAN
rm
MAR
APR
MAY
JUN
JUL
AUG
1979
1980
2.6
3.2
2.0
1981
2.6
2.7
2.7
1982
2.2
2.4
2.7
1983
2.3
2.3
JAN
FEB
NOV
DEC
AVG
3.0
2.0
2.6
3.1
2.7
2.9
2.5
2.5
2.4
2.4
2.5
2.6
2.6
3.0
2.4
2.8
3.0
2.6
2.5
2.2
2.5
2.1
2.6
2.2
2.4
2.1
1.8
2.2
2.1
2.1
2.0
2.1
2.2
2.3
2.6
2.6
AUG
SEP
2.5
MAR
OCT
2.6
APR
MAY
2.4
Yellow fin
(b)
YEAR
SEP
JUN
JUL
OCT
1979
1980
3.9
3.5
5.6
1981
4.7
4.9
4.6
1982
4.6
5.2
6.0
1983
4.9
4.7
NOV
DEC
AVG
5.0
5.4
5.2
5.0
5.4
5.2
5.9
5.6
4.6
4.6
4.3
4.9
5.0
5.4
5.1
6.2
6.0
4.9
5.1
5.0
3.8
5.1
5.1
6.4
5.2
4.9
4.4
5.1
4.8
4.3
4.7
5.1
4.7
5.0
5.0
5.5
st1nmarized from purse-seine catch fornB
5.0
12
Table 4.
Catch per unit effort ( l/ boat day) in domestic pole-and-line fishery
YELLOWFIN
YEAR
1970
SKIP JACK
4.51
1971
4. 21
0.06
1972
1973
1974
2.32
3.14
4.47
0.25
0.11
1975
0.24
1976
2.45
2.87
1977
1.95
0.46
1978
4.10
0.43
1979
3.08
o. 37
1980
2.95
0.34
1981
3.04
o. 58
AVERAGE
3.26
0.34
0.15
0.13
1.00
calculated from National Computer Centre "LE" data aet
Table 5.
Catch per unit effort ( t/boat day) in Japanese pole-and-line fishery
YEAR
SKIP JACK
1972
5.34
0.19
1973
7.48
0.20
1974
6.58
0.61
1975
3.46
0.19
1976
4.96
0.27
1977
2.69
0.47
1978
AVERAGE
4.05
3.07
0.26
0.22
YELLOWFIN
calculated from S.P.C. Technical Report No.2
13
cycles were compleme n .
high,
y ice
lo~
and
'rhe catch e s of these t wo t unas do no t appear to
be
1972 and
ve ~ s~.
independent.
limited
, that is, wh e n .:atches of yellowf in were
1976-1~/7,
This
ma y
by effort and
then catches of skipjack were
have resulted be cause the catches
large catches of one reduced
were
catches
of .
the other.
Japanese Pole-and-Line
Measurement of CPUE in tonnes per boat day for both skipjack
and yellowfin appears in Table 5.
lb
and
2b.
followed
The
Catches
similar
for the
This data is plotted in Figs.
Japanese
pole-and-line
trends to that of the domestic
fishery
pole-and-line.
mean annual CPUE of skipjack from the Japanese and
domestic
fisheries oscillated in phase but the yellowf in CPUEs were out of
phase.
This may indicate differences,
such as the mean age
of
c a pture, between the yellowf in taken by the Japanese and domestic
pole-and-line fisheries.
J a~a nese
Longline
Estimates
of
Japanese longline CPUE measured in
1000
hooks for 1962 to 1978 appear in Table 6.
we re
not
available from the S.P.C.
Skipjack
catch.
of
for
per
Th e se estimates
skipjack
since
1977.
have always been only a minor component of the longline
These CPUE estimates are plotted in Fig.
fishes
3.
caught fluctuated greatly from year to
obvious trends.
1977.
fish
The worst catches were in 1967,
Preliminary
The number
year
without
1972 and 1976-
data for yellowfin catches indicated that in
1983 the number of fish caught was low.
The monthly CPUE estimates f or yellowf in,
alalunga
CBonnaterre),
and
bigeye
Thunnus
albacore
obesus
kilogrammes per 1000 hooks appear in Table 7.
were
Thunnus
(Lowe)
in
No monthly trends
evident and annual estimates were calculated and appear for
yellowf in
in
Fig.
lb.
This figure
shows
a
non-significant
decrease in catches since 1979 but preliminary estimates for 1983
show a possible return to the 1980 level (Table 7a).
14
Table 6.
Nunber of fish per 1000 hooks in Japanese longl i ne fishery
YEAR
_,
~
YELLOWFIN
SKIP JACK
1962
11,209
26. 74
0.02
1963
6, 722
27.13
0.11
1964
6,026
31.55
0.08
196 5
4,901
27.58
0.19
1966
1967
9,542
26.30
o. 26
5,008
21.09
0.56
1968
6,428
27.90
0.25
1969
3,198
25 . 56
0.53
1970
1971
2,137
7,699
25.03
0.52
0.06
1972
5,440
19.00
1973
1974
9,056
28.00
17. 72
0.30
18.03
0.14
HOOKS/1000
27 . 61
0.02
0.18
1975
5,649
4,812
1976
6,697
17.83
0.07
1977
9,227
26.03
0.03
1979
1,863
28.30
1980
17 ,110
23.44
1981
22,728
1982
21,026
7,377
19.97
18.80
14.11
1983*
calculated from S.P.C. summaries
*part i al
year only
15
Figure 3.
{a)
LONG LINE
32
30
YELLOWFIN
NO . FISH/ 1000 HOOKS
V)
:it:
0
0
28
g
24
,
:r: 2 6
I
0
::: 2 2
I
V)
.....
20
LL
0
. 18
z 16
14
12..L_----.~....-~--r~~-r--.~r--.-.-~
62 64 66 68 70 72 74 76 78 80 82
YEAR
( b)
60
SKIPJACK
NO . FISH /100,000 HOOKS
\/) 5 5
"
Y'.
0
0
I
0
0
0
50
45
40
0
~ 35
I
30
\/)
..... 25
LL.
0
z
20
15
10
5
0
62 64 66 66 70 72 74 76 78
YEAR
Fig. 3.
Catch per unit effort in Japanese longline fishery
(a)
(b)
Yellowfin (Number per 1 ,000 hooks)
Skipjack (Number per 100,000 hooks)
16
Table 7.
Catch per unit effort (kg/1000 hooks) in Japanese longline fishery
(a)
YEAR
JAN
fEB
MAR
APR
Yellowfin
JUN
MAY
JUL
AUG
1979
SEP
OCT
NOV
DEC
AVG
444
679
853
747
738
1980
563
478
530
680
763
703
686
722
561
513
565
505
598
1981
399
470
366
484
425
455
477
480
455
398
506
607
458
1982
469
509
463
376
406
462
579
426
285
349
388
500
435
1983
510
454
511
512
887
607
768
(b)
',.. R
584
Albacore
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
AVG
1900
4
1
0
1
4
8
6
12
10
41
32
40
17
1981
40
42
96
31
6
25
78
101
71
58
16
1
48
1982
12
13
12
30
52
13
11
11
5
4
16
2
18
1983
1
0
5
17
191
37
10
9
(c)
YEAR
JAN
FEB
MAR
APR
MAY
41
Bigeye
JUN
JUL
AUG
1979
SEP
OCT
NOV
DEC
AVG
151
141
852
98
113
1980
182
158
111
152
146
94
90
89
72
77
77
Bl
104
1981
115
85
75
79
61
51
58
46
52
56
47
65
65
1982
60
76
67
59
54
59
66
58
74
99
116
108
70
1983
103
137
94
88
87
112
107
from S.P.C. SlJllmaries
103
17
Ja p ane se Purse-Seine
The monthly CPUE e s timates for sk i pjack and yellowf in app ear
in
Table
8.
The calculated annual e s timates were
Figs . lb
and
skipjack
catches
constant
for
plotted
Yellowf in cat c h e s were l owest in
2b.
were highest.
both.
Catches for other
in
1980
when
years
were
Catches of yellowfin and skipjack. do
not
a pp e ar to be inde pendent o f one another.
American Purse-Seine
The
monthly
estimates
of
catch per
ye llowfin and skipjack appear in Table 9.
we re
plotted
di ff e rences
in
Figs.
Ct-test,
lb and 2b.
successful
The annual
There was
no
p<.05) between the Japanese
set
for
estimates
significant
and
American
purse - seine catches of either yellowfin or skipjack for 1982.
GL ERAL DISC USSION
The
interpretation
oversimplified.
important
of data presented here
is
necessarily
Numerous assumptions have been nec e ssary.
assumption
is
that information provided
by
One
foreign
operators is complete and accurate; in practice this is difficult
to ve r ify.
During the course of th e se fisheries, effort has been
changi ng in ways difficult to quantify and standardise.
Vessels
and gear have been improved.
Purse - seine operations have become
much more efficient.
Fishing patterns have also undoubtedly
ch a ng e d.
The areas fished within P.N.Gs waters and the time of
t he y e ar these are fished may have altered considerably during
the
years.
estimates
ch a nges
possible
Further
analysis
should
examine
average
size
and CPUE on an are a by area basis while accounting for
in
gear eff i ciency.
with
the
Detailed analysis
will
continued cooperation and resources
S. P. C. and other member states.
only
be
of
the
18
Figure 8,
Catch per successful set (t) in Japanese purse-seine fishery
(a)
Skipjack
YEAR JAN FEB MAR APR MAY JUN JUL
AUG SEP OCT NOV DEC AVG
1979
1980
11
28
13
1981
15
18
26
1982
19
18
13
1983
21
18
15
20
18
31
27
16
24
24
9
18
22
20
13
12
23
22
16
21
7
23
14
18
23
27
21
17
21
20
20
22
16
20
25
39
32
33
(b)
28
Yellowfin
YEAR
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT
1979
8
7
9
8
i980
4
3
4
1981
4
8
7
1982
8
10
9
1983
6
6
NOV DEC AVG
6
5
5
6
5
5
4
5
5
3
4
8
7
7
15
8
10
6
7
6
7
10
6
17
8
6
5
6
8
4
6
7
10
calculat ed from Cntch Reporta
6
19
Table 9.
Catch per successful set (t) in American purse-seine fishery for 1982 .
YELLOWFIN
SKIP JACK
JANUARY
13.0
20.6
FEBRUARY
9.4
18.8
MARCH
13.2
23.1
APRIL
12.4
23.3
.MAY
12.2
16.l
JUt>E
13.8
4.5
JULY
8.5
10.0
20.9
10.8
8.3
19.6
OCTOOCR
10.0
13. 7
NOVEMOCR
12.1
26.4
OCCEMOCR
19.2
21.6
AVERAGE
12.8
17.4
AUGUST
SEPTEMOCR
calculated from Report #4 American Tunaboat Owners Association
20
ACKNOWLEDGEMENTS
My thanks to David Waites for providing summaries of
Japanese purse-seine data, to Ors. Meryl Williams and Bob Kearney
of the S.P.C. for their timely summaries and advice, and to
Ursula Kokolo, David Coates and Dr. John Lock for their advice
and editorial comments.
REFERENCES
Doulman,
New
D.J.
&·A.
Guinea's
Wright.
1982.
tuna fishery.
Recent development in Papua
Dept.
of
Primary
Industry,
Fisheries Research and Survey Branch, Port Moresby, Research
Report 82-10, 50pp.
·ies Agency of Japan, Research Department. 1980.
Annual
r eport of effort and catch statistics by area on Japanese
t una longline fishery. 57:3
Kearney,
R.E.,
Tagula
A.D.
71-1
242pp.
Lewis & B.R.
Smith.
'
1972 ;
Cruise report
Survey of skipjack and bait resou r ces in Papua
New Guinea waters.
Research Bulletin
Agriculture,
Stock and Fisheries (now
Industry>, Port Moresby, 145pp.
No.
8,
Dept.
Dept.
Primary
A.W. Argue & R.E. Kearney. 1983. Assessment of
CKatsuwonus pelamis> resources in the central and
western pacific by estimating stock and components of
population turnover from tagging data.
Tuna and Billfish
Assessment Programme, Technical Report No. 8, South Pacific
Commission, Noumea, 38pp.
Kleiber, P. ,
skipjack
Lewis,
and
A.D.,
B.R. Smith & R.E. Kearney. 1974.
billfish
in
Papua New
Guinea
waters
Studies on tunas
II.
Research
Bulletin No. 11, Dept. Agriculture, Stock and Fisheries Cnow
Dept. Primary Industry), Port Moresby, SOpp.
21
South
Pacific
Commission.
1980.
Skipjack fishing
effort ·· and
catch, 1972-1978, by the Japanese pole-and-line fleet within
200 miles of the countries in the area of the South
Commission.
Skipjack Programme Technical Report No.2
South Pacific Commission.
longline
within
Fishing effort and catch by the
of Japan (1962-77)
Commission.
9lpp.
and
Taiwan
(1967-77)
Skipjack
Programme Technical
South
Report
249pp.
Wankowski,
of
fleets
1981.
200 miles of the countries of the area of the
Pacific
No.3
Pacific
J.W.J. 1980. Recent history and summarized statistics
the industrial fisheries for tuna and tuna-like
species
in the area of Papua New Guinea Declared Fishing Zone 19701979.
Research Bulletin No.
24, Dept. Primary Industry,
Port Moresby, 83pp.
22
Appendix 1.
Catch per unit effort of skipjack and yellowfin
in domestic pole-and-line fishery
KG PER
KG PER
YEAR
BOAT NIGHT
BAIT BUCKET
1971
4.2
75.B
1972
2.7
39.7
1973
3.7
62.1
1974
4.5
B0.6
1975
2.7
45.9
1976
4.2
84.2
1977
2.5
32.5
1978
4.9
64.l
1979
3.3
47.3
3.6
59.l
AVERAGE
calculated from Wankowski, 1980
23
Appendix 2.
Catch per aet (t) in Japanese purse-seine fishery
(a)
YEAR JAN FEB MAR
APR MAY
Skipjack
JUN JUL
AUG SEP OCT NOV DEC AVG
1979
1980
9
16
13
1981
14
17
26
1982
17
13
7
1983
16
15
15
21
24
9
17
20
17
13
12
23
22
16
15
6
18
14
16
13
25
20
17
13
15
18
20
14
16
19
32
26
20
"
Yellowfin
APR MAY JUN
JUL
AUG SEP OCT
1979
1980
3
2
4
1981
4
7
7
1982
7
8
5
1983
5
5
12
22
15
JAN FEB MAR
10
26
(b)
YEAR
14
NOV DEC AVG
6
5
6
5
4
4
5
5
5
4
5
4
3
4
B
7
7
11
7
8
6
7
4
6
9
6
11
6
5
5
5
6
3
5
6
5
calculated from Catch Reports
5
24
Appendix 3.
Catch per day fishing (t) in Japanese purse-seine fishery
(a)
YEAR
JAN rm MAR
APR
Skipjack
MAY
JUN
JUL AUG SEP OCT NOV DEC
1979
AVG
8
6
7
1980
5
11
8
15
15
9
15
17
4
11
14
11
1981
6
9
12
5
5
14
8
8
4
12
9
8
1~82
12
8
4
11
12
9
8
11
14
13
10
10
1983
10
8
10
10
14
23
18
AUG
SEP
6
(b)
YEAR JAN rm MAR
MAY
APR
13
Yellowfin
JUN
JUL
OCT
1979
NOV DEC
AVG
4
3
4
1980
2
1
2
3
3
3
4
4
2
3
3
3
1981
2
4
3
2
2
4
4
6
4
5
4
4
1982
5
5
3
3
5
3
6
4
4
3
3
4
1983
3
2
3
1
2
3
4
2
calculated from Catch Reports
25
Appendix 4.
Catch per unit effort (t) in American purse-seine fishery for 1982
(a)
Catch per set
YELLOWFIN
SKIP JACK
JANUARY
10.8
17.l
FEBRUARY
7.3
14.5
MARCH
11.3
18.2
APRIL
10.5
19.8
MAY
9.6
12.7
JLNE
12.l
4.0
JULY
8.1
9.5
11.5
5.9
SEPTEMBER
6.5
15.3
OCTOBER
5.3
7.3
NOVEMBER
9.1
20.0
CI:CEMBER
13.2
14.B
AVERAGE
9.6
13.3
AUGUST
(b)
Catch per days effort
YELLOWFIN
SKIP JACK
JANUARY
8.2
13.0
FEBRUARY
5.4
10. 7
MARCH
11.3
18.2
APRIL
9.1
17.0
MAY
8.0
10.6
JLNE
7.6
2.5
JULY
5.4
6.4
AUGUST
5.5
2.B
SEPT EM OCR
5.9
13.8
OCTOBER
3.3
4.6
NOVEMl£R
7.3
16.l
CI:CEMBER
15.4
17.3
AVERAGE
7.7
11.1
calculated from Report 14 American Tunaboat Owners Association
26
ADDITIONAL APPENDICES
JAPANESE LONGl INE CATCH SU"4ARY
1979
••.......................................................................................................
___ ..
JIH
FEB
HNI
·--------------
APR
HAY
JUN
JUL
AUG
-------
OOAT DAYS f!SHED
SEP
OCT
71
JlB
J2
JOB
Jl
29J
JO
990
124
594
J2
589
556
JO
186J
96
64
151
.IB
.09
.16
I per Month
NLJlll:R JOOO HOOKS
I p<!r Monl.h
SPECIES1
NOV
_____
_DCC
__
J2
IOI Al.
ALBACORt
NUM8£R OF f!SH
I p<!r Honth
2
l
49
J2
.02
.OJ
.09
.16
.01
.02
.4
27
.I
1.1
7J
I.~
7
,OJ
.01
.01
.6A
1.26
9.17
.17
.JJ
25.00
l. 98
'· 76
I 1.46
.Bl
1.52
9 . 94
7B6
9
J5B5
42
20J4
24
2095
25
B500
f!SH/1000 HOOKS
f!SH/DA YS f!SHED
6.J4
11.08
6.04
I I. 29
J.46
6.61
J.77
7.16
4.57
B.59
!EIGHT flSH (HT)
I per Month
18. 7
9
83 . 5
40
54.1
26
54 . 7
26
210.8
150. Bl
26J. 39
23.80
140.58
262. 58
23. JO
91.86
175.65
26.60
90 . J9
186.69
26.11
llJ.16
212.93
24.BO
2444
4
16882
JO
18934
JJ
18306
32
56566
rISH/1000 HOOKS
f!SH/DA YS rISHED
19. 71
J4.4J
29.43
5J.09
32.15
61.49
J2.9J
62.48
JO.J7
57 .14
IUGHT FISH (MT)
I per Month
55
40J,5
29
501.A
J7
415. 5
JO
JJ74 . 6
rI SH/1000 HOOKS
rlSllED
r !SH/DAYS
1£ IGHl f!SH (Ml)
I per Month
KG/I 000 HOOKS
KG/DAYS f ISH£0
AVG KG/f!SH
SPECIES•
BIGEYE
NUMBER or r !SH
I per Month
--
KG/1000 HOOKS
KG/DAYS f!SHED
AVG KG/flSH
SPECI£S1
YELLOlflN
NUMBER or FISH
I per Honth
-
KG/1000 HOOKS
KG/DAYS rISHED
AVG KG/FISH
SPECIES1
NUMll:R
·"
-
44J.55 679. JO 951. 96 747.Jl 7J7 .85
774.65 1269.87 1629 . 23 1418.0'J IJBR.49
22.51
26. 51
22. 70
2J.91
24.Jl
ll.ll: MARLIN
or r !SH
47
6
212
27
252
nsH/1000 HOOKS
f!SH/OAYS FISHED
.JO
.67
.J6
.67
.43
.82
.40
.91
.42
IC IGHT FISH (Ml)
2.6
6
12. 7
JI
12.9
J2
12. 7
JI
40.8
20.97
36.62
55. J2
21.39
J9,94
59.91
21.91
41.89
51.20
22.85
4J.J5
48.11
21.91
41.22
52.65
I per Month
I per Month
KG/1000 HOOKS
KG/DAYS r !SHED
AVG KG/r !SH
CALCULATED FROM SPC Sl.HMARIES
n
264
775
)4
• 79
27
JAPANESE LONGLINE CATCH
SU~ARY
1990
....•....................................................................................................
rEB
MAR
APR
MAY
JLN
Jll.
ALC
SEP
OCT
NOV
rec
TOT Al
699
8
757
979
11
1069
12
1015
12
9777
9
BOAT DAYS r !SHED
I per Month
472
5
6J9
518
699
68J
6
59)
7
667
7
9
0
8
NlJ1!£R 1000 HOOKS
I per Month
909
5
1266
7
1017
6
1167
7
126)
7
1)64
1J47
8
1JJ6
8
1518
9
1896
11
2059
12
1967
11
17110
8
91
8
77
287
1
666
J
445
2
980
5
1055
5
5168
27
4450
2J
575)
JO
19286
, 09
.15
.01
.02
.07
.lJ
.2)
.44
.49
.97
.J4
,66
• 74
1.41
• 70
1.40
2.n
5.29
2.17
4.17
2.9J
5.67
J.lJ
2.20
l.J
.1
1.1
4.4
2
10. 7
4
7.6
J
16.J
15.J
5
78
26
65
23
79.4
28
283.5
6
SPECIES a
NUHll: R or rISH
ALBACORE
~6
I per Month
rISH/1000 HOOKS
r !SH/DAYS rISHED
2
.34
.65
•
IUGHT f!SH (MT)
I per Month
KG/1000 HOOKS
KG/DAYS r !SHED
AVG KG/rI SH
SPECIES1
NUM!£R or r !SH
I per Month
rISH/lOOO
HOOK~
r !SH/DAYS r ISHEb
WEIGHT rISH (MT)
I per Month
KG/1000 HOOKS
KG/DAYS f !SHED
AVG KG/rISH
SPECIES a
1
I.OJ
2.04
14.29
.10
.20
12.51
.95
1.86
14.29
J.49
6.60
15.J4 .
7.85
15.56
16.07
5.65
11.lJ
17 . 08
12. 21
2J.J2
16.64
10.08
20.22
14.51
41.14
79. 76
15.10
Jl. 57
60.87
14.61
40.37
78.23
lJ.81
16.57
32.Jl
14. 70
6517
10
7270
12
ll080
7
6176
10
6652
11
4J4J
7
4067
JJ57
3679
6
4918
5588
5509
62764
8
9
9
7.17
13.81
5 . 75
ll,J9
4.02
7.89
5,JO
10.42
5.27
9,98
J.19
6.J2
J.02
5.96
2.97
5.67
2. 4J
4,66
2.60
5,0J
2. 72
5.24
2.81
5.4J
J.67
7.16
165.5
200.l
11
113
6
177.9
10
184.9
10
128.l
7
120 . 8
7
119.1
7
109.3
6
145.6
8
159.J
9
159.2
1782.5
9
182.07
J50.64
25.40
158,06
JIJ.15
21.50
111.12
218.15
21.10
152.45
JOO.OJ
28.e1
146.40
277.22
27.80
9J.92
186.20
29 .50
89.69
176,87
29.71
89.15
170.J9
J0.10
72.0l
144.39
29.11
76.80
148.88
29.61
77.37
149,16
20 ..51
80 , 94
156.85
20,90
104.18
20J,09
28.41
4.41
8.48
13 . 08
BICE YE
9
YELUIWf lN
NUMll:R or f!SH
I per Month
23272
6
25199
6
22010
6
J2271
8
)7491
10
J$76J
J4003
9
34814
31533
8
J4348
9
43079
11
38034
10
391897
rtSH/1000 HOOKS
rISH/DA YS f!SHED
25.61
49.Jl
19.91
J9.44
21.65
42.50
27.66
54.42
29.69
56.21
26.22
51.99
25.JI
49.91
26.06
49.81
20.78
41.66
18.12
J5.1J
20.9J
40.34
19.J4
37.48
22.91
44.66
WEIGHT f!SH (MT )
I per Month
512
5
604.5
6
5J9.2
5
79J.9
8
96J.5
9
958 . 4
9
92),6
9
964.J
9
851.4
8
972
ll6J.l
11
992.7 10228.5
512,66 564.89
993.87 1089.05
28,JO
27.00
504.68 597.81
978,0) 1165.J8
26.11
26.10
KG/l ODO HOOKS
KG/DAYS r !SHED
AVG KG/l"ISH
SPECIES1
NUM!£R or f !SH
I per Month
rtSH/1000 HOOKS
f!SH/DA YS f !SHED
WEIGHT flSH (HT)
I per Month
KG/1000 HOOKS
KG/DAYS f !SHED
AVG KG/rlSH
56J.26
1084.75
22.01
477.49 5JO,l9 680,JO 762.87 702.64 685.68 721.79 560,87
946.01 1040,93 1338, 79 1444.53 1J9J.03 1J52,27 1J79.55 1124. 71
2J.99
24.50
24.61
25.70
26.80
27,10
27.70
27.01
10
10
ILll: MARLIN
510
7
624
J72
5
46J
7
JJ8
5
462
7
607
446
622
9
9
6
9
.57
.50
.98
.J7
• 72
.40
• 79
.27
.51
.)4
.68
.46
.89
.34
.64
J2. 7
9
19.9
6
25.2
18. 2
2), 7
29 .1
8
7
5
7
8
J2.1J
61.87
57 .26
25.8J
51.18
52.41
19.57
38.42
SJ.SO
21.60
42.50
54.4J
14.42
27.29
53.05
17 .38
J4.45
51.JO
21.61
42.61
47.95
1.09
29.2
CALCULATCO fRCJ4 SPC SlJ1MARIES
801
11
927
lJ
842
12
.41
.BJ
.4J
,82
.46
.87
.4J
.OJ
20.6
6
27 . 8
8
40
11
50.1
14
44.2
12
J60.5
15.42
29.48
46.19
18. )2
J6, 7J
44. 70
21.10
40.90
49.94
24.J4
46.92
54.05
22.48
21.07
41.08
51.40
4J.55
52.50
7014
.41
.oo
28
JAPN-IESE LONGLINE CATCH SU'*'ARY
1981
•...........................•............................................................................
OOAT DAYS rtSHED
II per Month
NUMOCR 1000 HOOKS
Jifj
FEB
MAR
APR
MAY
J~
Jll.
Al.C
SEP
OCT
NOV
OCC
TOT AL
8)8
7
1077
9
941
769
854
970
8
1192
10
1272
11
11671
7
887
8
1015
7
954
8
902
9
1606
2055
9
1839
1460
6
1679
7
1915
8
1792
8
1910
2252
2015
22728
10
2448
11
1H9
8
5744
12038
18
2972
768
1
2775
4
7545
11
11939
17
9755
14
8821
lJ
1761
J
117 .
4
I per Month
SPECl£S1
7
ALBICORE
NliMOCR or rISH
I per Month
4397
6
rISH/1000 HOOKS
r ISH/MYS r ISHED
2. 74
5.25
l«:IGHT rtSH (HT)
I per Month
KG/1000 HOOKS
KG/ DA VS flSHED
AVG KG/rJSH
SP£CIES1
8
68632
2.80
6,55
5. 34
12.eo
2.04
3.87
.46
,90
1. 45
2.91
4.22
8.51
6.26
12,Jl
4.34
8.19
J.61
6.94
1.01
1.96
.06
. 12
3.02
5.89
64.2
6
86.2
117
11
45.9
4
10 .1
49.6
139.6
l.6
1091.2
4
n
160
15
28.4
l
193.4
18
141.l
8
n
J
11 . 98
41.95
80.04
15.01
63 . 63
124. 34
9.72
H.37
59.56
15.42
6.02
11.83
n.16
25.38
50.95
17 , 52
77.91
157,)9
18.51
101.26
199.39
16.20
71.05
134.23
16.41
57.64
110.93
16.00
16.15
Jl . 49
16.lJ
. 00
1. 58
JJ.68
48.02
93.50
15.90
3017
4920
9
53435
76.62
14.61
B!GE'IE
NUHOCR or r ISH
S per Month
6551
12
6144
11
4610
9
4161
8
)624
7
3623
3761
7
3710
7
4823
9
4491
7
rISH/1000 HOOKS
f !SH/DA VS flSHED
4.08
7.82
2.99
2.51
4.90
2.95
5.42
2.16
4.25
1.90
5. 71
3.80
2.10
4 . 25
1.95
3.83
2.15
4.05
1.84
J.54
1. 72
J. JS
2.45
4 . 85
2.36
4.58
l«: lGHT fJSH (MT)
S per Month
185.4
lJ
173.9
12
137 .4
115. 7
101.8
98.2
7
104.2
7
87 .6
116. 7
JJ0.4
1480.1
6
8
137
9
82.4
7
6
9
115.45
221.25
28.Jl
84.63
161.47
28.31
74. 72
146.02
29.81
79.25
150.46
27.81
60 . 67
119.21
28.10
51.28
102.94
27.11
58.15
117 . 48
27.71
45.87
90.Jl
23.62
51 . 83
97.9]
24.20
55.97
107 . 71
J0.51
46.85
91.36
27.32
64. 72
128.48
26,51
65,ll
126.82
27.70
KG/1000 HOOKS
KG/DA VS r !SHED
AVG KG/flSH
SP£CIES1
9
8
YtLLOWf lN
NUMOCR or flSH
!I per Month
25304
11090
9
31145
7
34947
8
32436
7
40508
9
41462
9
40579
9
46152
JO
)8025
8
36156
8
45200
10
451092
6
r lSH/OA VS
flSH/1000 HOOKS
f !SHED
15.76
J0.20
19.03
36.JO
16.94
3',10
23.94
45,45
19.34
37.99
21.16
42,47
23.14
46,75
21.25
41 , 84
20.50
38, 72
15 . 54
29,90
20 . 56
40.09
22.40
44,62
19.85
38,66
WEIGHT flSH (HT)
I per Month
640 , 2
6
965.5
9
672.7
6
705.9
7
713.6
1
870.9
8
854.l
B
917.1
9
1024 . 6
10
973.4
9
009.4
9
)98.64
763,97
469.83
896.48
24. 70
365.80
714.88
21.60
483.50
917.95
20.20
425.27
035.60
22.01
454.70
912.90
21.50
476.62
962.91
20.60
480.16
945.47
22.61
454.98
859.57
22.21
397.64
765.26
25.60
KC/l 000 HOOKS
KG/OA VS r !SHED
AVG KG/flSH
SP£CIES1
25,Jl
1222.8 10420.2
12
505,63 606.85
906,04 1204. 7J
24.60
27.01
458.48
892.03
23.JO
Olli: HARL IN
NUHOCR or FISH
I per Month
744
10
640
9
503
7
)9J
5
619
B
651
9
551
7
387
5
570
8
88J
12
795
11
747
flSH/1000 HOOKS
flSH/DAVS f!SHED
.47
.89
,J2
.28
.54
.27
.52
.J7
.n
.J4
.69
.Jl
.63
.21
.40
.26
.60
.40
.37
• 70
.46
.89
.38
• 74
.65
WEIGHT FISH (HT)
I per Month
)8.5
J8
19 .e
5
29,9
27 .3
20.9
29.4
51
40.5
10
35
J07 . 6
10
29.4
8
JO
10
23 . 98
45.95
51. 75
18.50
35,29
59 . 38
15.99
JI. 25
58.45
lJ.57
25. 75
50.)9
17.88
35.D
48.47
17 .37
34.49
46,86
17 .06
KG/1000 HOOKS
KG/OA VS fJSHEO
AVG KG/FISH
CALCULATED FROM SPC SUMMARIES
B
lJ
15.62
31.JS
45.93
15.24
JO. 78
49. 55
10.95
21.55
54.01
IJ.06
24 . 67
51.58
20.04
23.03
40.10
44,91
57.76
50.95
7483
10
.n
JJ.22
51.80
29
JAP~ESE
LONGLINE CATCH SU""1ARY
1982
.........................................................................................................
Jll.
Alx:
SEP
OCT
NOY
OCC
TOT Al
761
7
7U
711
7
6J9
7J2
7
384
602
10401
7
1S21
7
1474
142)
1291
147S
796
1221
21026
7
7
7706
J4
1J49
1065
906
407
s
JOJ
2
8J7
4
1J7 .
6
1.46
J.02
J.26
6.56
.89
1. 78
•7)
1.44
.64
1.28
.J2
.64
.26
.5J
1.06
2.lB
.12
.2J
1.07
2.16
86 . J
2J
12).J
16.J
6.4
S.9
2
lJ.l
4
2.1
1
J68.4
)J
20 . l
5
16.6
7
12. 72
25. 27
14,J9
l l.SJ
2J. 70
lS.SB
'19.72
61.47
20 . 41
S2.14
l04.8S
16.01
lJ.22
26. 42
14.90
11. 27
22.41
lS. 59
11.46
22. 9J
18.00
4.96
10.02
lS. 7J
4.00
8.07
15.41
16.46
J4.12
15.66
I. 72
l.49
15.JJ
17 .SJ
JS. 42
16.40
J~
FEB
HAR
APft
MAY
BOAT DAYS FISHED
'I per Month
1082
10
1021
10
1148
11
1404
lJ
1176
NlJllER 1000 HOOKS
'I per Month
2168
2029
10
2J61
11
2904
14
2J6S
lO
NUMOCR or FISH
s per Month
1905
8
179J
8
1746
42JO
19
Fl SH/ lOOp HOOKS
r !SH/DAYS r !SHED
.e8
1. 77
. 89
1. 76
.74
I.SJ
IUGHT FJSH (KT)
'I per Honth
25.9
7
25.8
7
27. 2
11.95
2J.94
lJ.60
SPECIES1
11
11
4
AlBfCORE
KG/1000 HOOKS
KG/ DA VS rISHED
AVG KG/FISH
SPECIES1
s
4
22464
1
BIGE'lt:
NUMOCR or rJSH
'I per Month
4760
5707
11
542J
4667
9
J601
7
4027
7
J216
6
3617
7
54JS
1.0
479S
9
54309
lO
S72S
11
JJJ6
9
rISH/1000 HOOKS
r ISHIM vs r !SHED
2.20
4.40
2. 82
5. 59
2.JO
4. 7J
1. 98
4.08
1.98
J,97
2.J7
4 . 74
2. 74
S.44
2. 27
4.5)
2.Rl
S.67
J.69
7 .4}
4.20
8.69
),9J
7.97
2.S9
S.2J
IUGHT rISH (KT)
'I per Month
lJ0.9
9
lSJ.S
10
158.4
11
170.6
12
128.8
9
90
97.9
7
82.)
6
95.S
6
146. 7
10
9·2 .1
6
lJl.9
1477.2
60.JB
120.98
27.50
75.66
1SO.J5
26.90
67.10
1J7.98
29.21
S8.75
121.51
29,80
54.47
l09.5J
27.60
59.18
118.27
2S.OO
66.42
1J2.12
24.J2
57.84
115.76
25.60
7J.98
149.46
26.41
99 . 46
200.41
27.00
115,71
2J9.85
27.61
108.0J
219.11
27.SI
70.26
142 . 0J
27.20
KG/1000 HOOKS
KG/M VS FJSHED
AVG KG/rJSH
SPECIES1
9
YELLOWFIH
NUMOCR or rJSH
'I per Month
41487
lO
41824
11
45J21
11
48277
12
454Sl
11
JJ4JJ
8
402Jl
10
27660
7
16804
4
2085S
s
117JJ
24541
6
397617
J
Fl SH/1000 HOOKS
rISH/MYS rISHED
19.14
JO.JS
20.62
40.97
19.20
J9,48
l6.6J
34.'9
19.22
JB,6S
21.99
4J.94
27.JO
S4.JO
19.44
JB.91
lJ.02
26,JO
14.14
28,SO
14.74
JO,S6
20.10
40.77
18.92
JB.2J
MEIGHT FISH (KT)
!; per Month
1016.4
11
lOJJ.1
11
1092 . 2
12
1091.1
12
9S9
lO
702.1
8S2.9
9
60S,8
7
J68
4
51S.l
6
JOB.6
611.l
7
9145.2
KG/1000 HOOl<S
KG/MYS r!SHED
AVG KG/FISH
468.82 509 , 17
9)9,)8 1011.86
24.50
24.71
462.61
951.40
24.10
J7S.7J
777.14
22.61
40S.SO
815.48
21.10
461.61 578.6)
922.61 llSl.02
21.01
21.21
42S.7J
8S2.04
21.91
28S.06
S7S.90
21.90
J49.2J
703.69
24.70
J87.69 500 .50
803.65 !OlS.12
26.Jl
24.91
4)4.9S
879.27
2J.Ol
94
1
115
2
JJ9
6299
.07
.lJ
.ls
,JO
.28
.S7
.JO
.61
20 .)
Jll.8
16.6}
JJ. 7J
S9 .89
14,BJ
29.98
49. so
SP£CIES1
J
ll.lC MARL IN
NUH!l R or rISH
S per Month
951
lS
881
14
1041
17
1219
20
648
JO
4S7
221
II
18J
no
7
)
2
rISH/1000 HOOKS
r!SH/M YS rISHED
.44
.88
.44
.87
.4S
.91
.4J
,89
.28
.S6
.Jl
.61
.lS
.JO
.lJ
.26
.11
ME IGHT rISH (KT)
S per Honth
41.l
lJ
'9.7
lJ
51
16
62.4
20
32.l
10
21.6
7
11.4
4
11
4
8.6
J
5.4
7.2
2
2
18.96
J7,99
43.22
19.57
J8.89
4S.07
21.61
44,4J
49 . 00
21.49
44.4S
SO.J7
lJ.Se
27.JO
49.S4
14. 21
28. 39
47. 27
7. 74
lS. 39
Sl.59
7. 74
lS.48
60.11
6.67
lJ.46
66.16
J.67
7,J8
S7,45
9 .os
18.7S
62.61
KG/1000 HOOKS
KG/DA VS FISHED
AVG KG/FISH
CALCULATED fROH SPC SUMMARIES
• 21
s
30
JAPANES£ LONGL IN£ CATCH SU"4ARY
19BJ PARTlAL ONLY
···························································································
-·········· ....
rrn
--------------------- ----------J!tl
AUG
S£P
OCT
NOV
IOTAL
HAR
Af'ft
HAY
JLN
Jll.
lOJ
J659
0£C
BOAT DAYS rISHED
" per Month
669
18
621
17
655
18
586
16
6J8
17
JB7
NUMOCR 1000 HOOKS
S per Month
1 J82
19
1250
17
1J29
18
1178
16
1259
17
77J
206
J
7J77
JO
76
25
J59
2
ll62
B
1210)
BO
IJ86
9
91
1
15202
.06
.12
.02
.05
.28
.55
.99
1.99
9.62
18.98
I.BO
J. 59
.45
.f!9
2.07
4.16
.4
6.2
2
20.5
7
240.B
80
28. J
9
2
1
299. 5
.32
.65
16.00
4.67
9.47
17 .28
17.41
34.99
17 .65
191.27
J77 .4'
19.90
36.62
7J. JJ
20.42
9. 71
19.42
21.98
40.60
81.86
19. 71
SPECIES1
ALBM:ORE
NUHOCR or rISH
S per Month
flSH/1000 HOOKS
rISH/OA 1'.5 r !SHED
ICIGHT rISH (HT)
I per Month
KG/1000 HOOKS
KG/DAYS rISHED
AVG KG/rISH
SP£Cl£S1
II
.n
1.50
lJ.16
BIG:YE
NUHB£R or r ISH
I per Month
5051
18
6298
23
4598
17
4050
15
}858
14
Jl21
11
772
J
27748
fl SH/1000 HOOKS
f!SH/ DAYS rISH£0
3.66
7. 56
5.04
10.15
3.46
7.02
J.44
6.92
J.07
6 . 05
4.04
8.07
3. 75
7,50
J. 77
7.59
Ii: IGHT f!SH (HT)
142.4
19
171.3
2J
125.1
16
lOJ. 7
14
109.2
14
86.5
11
22
J
760,3
JOJ.04
212.86
28.20
137 .04
275. 85
27 .20
94.14
191.00
27 .21
88.04
176,97
25.61
86. 74
171.16
28.31
111.91
22J. 52
27. 72
106.80
213.60
28.50
S per Month
KG/1000 HOOKS
KG/DA VS FISHED
AVG KG/flSH
SPECl£S1
28993
16
2J5J9
JJ
27282
16
25216
14
46750
27
18129
JO
5948
3
f!SH/1000 HOOKS
rISH/OA YS rISHED
20.98
4J.34
18.84
37 .91
20.53
41.66
21.41
43.04
J7 .u
7),28
23.46
46.85
2A.88
57. 75
ICIGHT rISH (HT)
ll per Month
704.5
16
567 .3
679.3
16
602. 7
14
1117 .3
26
469.5
11
158.2
4
SP£CIES1
NUHIJ:R or f!SH
I per Month
-
-
lOJ.07
207. 19
27.41
YELLOW!' IN
NUHOCR Of rISH
ll per Month
KG/1000 HOOKS
KG/DAYS rISHEO
AVG KG/FISH
I
lJ
509. 77 453.84 511.14 511.63 887 .46 607 .J8 767 .97
1053.07 9JJ.53 10J7.JO 1028.50 1751.26 1213.18 1535.93
24.30
24.11
24.90
2J.91
2J.90
25.90
26.60
-
175857
ZJ.84
48.07
-
4308. 5
-
584.05
- 1177.51
24.51
BUE MARLIN
700
29
542
23
381
16
212
9
311
lJ
174
66
J
2386
1
flSH/1000 HOOKS
f!SH/OA YS f!SHEO
.51
1.05
.44
.88
.29
.59
.18
.J7
.25
.49
.23
.45
.3J
.65
.JJ
.66
IC !Gill r !SH (MT)
I per Month
37
29
JO
24
20.J
16
11.4
9
16.2
1J
8.6
3.J
J
126.9
26. 7B
24.00
48.31
55.)6
15. 28
Jl.00
5J.29
9.68
19.46
5J. 78
12.87
25.40
52.10
11.IJ
22.2J
49 .4J
16.02
32.0ll
50.00
17.21
34.69
5J.19
i<G/1000 HOOKS
KG/ DAYS f ISHEO
AVG KG/f'ISH
55. Jl
52.86
CAlctl.AT£0 fROM SPC SUMMARl£5
31
JAPAN£S£ PURS£ S£IN[ CATCH SUl+lARY
1979
.........................................................................................................
OCT
NOV
occ
TOTAL
4
5
19
25
52
68
76
NO, SOCCESSfUL SET
I per Month
17
JS
28
58
48
NO . DAYS IN ZOI£
I per Month
28
26
65
61
107
270
J4
520
65
794
J/fol
rEB
---- - ------
HAR
APR
HAY
.... - - - -
J~
Jll.
ALC
SEP
NJMOCR SETS
I per Month
SPECIES1
SKIPJACK
TOT Al CATCH (HT)
I per Month
AVERAGE WT , (KG)
).00
2.00
2.20
J.00
2.60
JOO
100
50
50
82
75
54
77
71
1.00
1.00
• 20
• 75
1.50
15.89
.Je
9.65
10.00
18. 58
8.00
10.45
16. 55
7 .4J
TOTAL CATCH (MT)
I per Month
17
5
120
J2
2J5
6J
J72
AVERAGE llT. (KG)
e.so
9.1 ~
7.10
7.BO
I DCC.SUCC.SETS
I OOH.SUCC.SETS
JOO
50
88
18
79
81
Jl
4. 25
6.J2
7.06
4.29
4.52
8.40
J.62
I ace • succ. SETS
I OOH.SUCC.SETS
CATCH/SET (MT)
CATCH/SUCC. SET (MT )
CATCH/DAY IN Z01£
SPECIES1
60
YELLOWF"IN
nTCH/SET (MT)
CATCtl/SUCC.SET(MT)
CATCH/DAY IN ZDI£
SPECIES 1
14.22
a.so
2.lJ
J9
4.90
7. 75
J.48
BICE YE
TOT AL CATCH (HT)
I per Month
5
JOO
AV£RAGE WT . (KG)
10.00
I ace. socc. SETS
I OOH,SUCC , SETS
CATCH/SET (HT)
CATCH/SUCC,5£T(HT)
CATCH/DAY IN lM
CALCULATED rRcJI SPC SIH4ARIES
J0.00
50
1.25
2.50
.6J
,07
.11
.05
32
JAPANESE PURSE SE !NE CATCH SU,...ARY
1980
.........................................................................................................
J,.,
OCT
NOV
DCC
T9TAL
56
10
21
46
B
117
22
543
29
6
56
12
21
4J
9
105
22
485
41 ·
5
69
9
42
5
62
8
152
20
775
660
6
lJOJ
lJ
165
2
755
7
2268
22
10179
2.40
2.50
2.40
2.40
2.50
2.60
2.50
100
74
97
79
97
79
96
84
95
62
98
84
100
90
96
26.05
JO. 70
l 5.6J
21.95
27 .17
20.02
14.01
15 . J6
9.94
20.00
22. 76
16.10
2J.27
2J. 27
7 . 86
7.86
J. 9J
16. 42
17.56
12.18
19. J9
21.60
14. 9J
18. 75
20,99
44
2
329
14
223
9
544
22
174
7
2,75
11
9~
190
550
2J
2428
7.10
5.60
4. 40
6,20
4. 70
5. 70
4.40
4 . 10
4.20
J.90
4.50
JO
lJ
64
99
67
21
74
14
66
14
82
5
100
19
81
89
Ill
25
6
lJ
.J2
.6J
.2J
4.00
4.00
2. 59
4.97
5.96
2.99
4.29
5.Jl
J .92
4. J6
4. 78
2. 78
5.28
6.00
4.25
4.92
4.92
J.99
4.5J
4.5J
2.27
4.14
4.42
J.07
4. 71
5.24
J.62
4.48
5.01
J, 14
Jl
42
7J
4.80
4.40
12
5
0
.27
.JO
.21
.14
.15
.10
HAY
J~
Jll.
Al£
SEP
11
2
66
12
52
10
125
2J
"
6
11
2
56
12
42
9
114
24
22
J
17
2
110
14
57
7
196
25
TOT AL CATCH (HT)
I per Month
272
J
145
l
1719
17
1141
11
1751
17
AVERAGE WT. (KG)
2. 70
2.00
2.50
2.80
88
88
91
91
80
66
11.00
)4,00
12.J7
lJ.19
lJ.19
8, SJ
fEB
HAR
16
J
APR
----------------------Nll411:R StTS
I per Month
NO . SOCC£SSfUL SET
s
per Month
NO, DAYS ,IN ZON£
I per Month
SPECl£S1
SKIPJACI<
I OCC.SOCC.SETS
S OOM.SUCC.SETS
CATCli/SET (MT)
CATCH/SUCC.SET(MT)
CATCH/DAY IN ZONE
SPECIES1
lB.99
80
1'.14
lt:LLOWflN
TOT Al CATCH (MT)
~
-------- --------
per Month
AVERAGE WT. (KG)
S OCC.SUCC.SETS
I OOM.SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC.SET(HT)
CATCH/DAY IN ~E
SPECIES1
4
BICE YE
TOTAL CATCH (MT)
I per Month
AVERAGE WT. (KG)
)8
52
8.90
I OCC , SUCC •SETS
I OOM.SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC.SET(MT)
CAT CH/ DAY IN Zlll£
CALCULATCO fRIJ4 SPC SIM4AA !ES
5.00
.90
16
.04
.04
.02
.68
.68
.56
.05
.05
.04
33
Jl\rANF.S( rURSE S( INE CATCH SU!t!ARY
1981
.........................................................................................................
J/IN
rrn
Hl\R
NlMll:R SETS
I per Month
60
7
107
lJ
41
5
NO. SUCCESSfUL SET
I per Month
55
7
99
lJ
41
5
1116
8
178
14
86
----------
NO. DAYS IN
I per Month
~E
SPECIES1
7
APR
JLl
Alt:
SEP
OCT
NOV
occ
IOTAL
22
3
102
12
98
J2
58
7
57
7
126
15
144
18
821
21
J
100
lJ
97
lJ
4J
5J
99
1J
141
19
755
84
6
154
12
242
18
1J09
HAY
Jl.N
----------- ------------
6
12
1
46
4
21
2
142
11
154
12
84
25J
2
115
21J7
46J
4
2039
16
2001
16
12815
17
1549
12
718
l
6
SKIPJACK
TOTAL CATCH (HT)
I per Month
716
6
1764
14
1047
8
1J
AVERAGE WT. (KG)
2.60
2. 70
2.60
J.00
2.70
2. 70
2.90
2.60
2.50
2.20
2.60
2.10
2.50
95
78
97
70
98
88
100
100
90
57
100
60
95
BJ
96
95
74
75
64
J4
93
67
95
68
94
69
11.94
13.02
6. 76
16.49
17 .82
9.92
25.54
25.54
12.18
lJ.00
lJ.00
1.09
11.50
12 .05
5.50
23.00
2}.00
5.48
20.96
21.J7
15.05
15.81
15.97
10.06
12.38
16. 70
8.55
8.lJ
8. 74
5. 52
16.19
20.60
lJ.25
lJ.90
14.20
8. 21
15.61
16.98
9. 79
226
4
775
14
284
5
92
2
40
I
607
11
705
1J
476
9
4U
8
957
842
16
5421
18
4.00
4.20
4.40
5.00
4. 70
4.80
6.00
5.eo
a.au
4.80 •
7. 70
3.JO
4.90
84
80
7
100
u
91
21
JOO
19
100
96
RO
20
95
2J
96
40
76
11
60
24
94
22
90
22
J. 77
4.ll
2.14
7. 25
7 ,BJ
4. J6
6.93
6.9J
J.Jl
J.00
J.00
• 25
4.19
4.J9
2.00
8.00
8.oo
1.91
5,96
6.07
4.28
7.20
7 .27
4.58
8.21
11.07
5.67
7 .27
7.82
4.9J
7.60
9.67
6.22
5.85
5.98
J.48
6.61
7,19
4.15
9
8
5
4
22
18
28
24
J7
JI
5
4
5.00
J.50
J.00
4. 70
6.00
8.90
100
48
5
1.00
1.00
.09
1.00
1.05
.48
I OCC. SI.CC. SETS
I OOH.SUCC.SETS
CATCH/SET (MT)
CAICH/SUCC.SET(HT)
CATCH/DAY IN ZONE
~LLOWf IN
SPECIES1
TOT Al CATCH (HT)
I per Month
AVERAGE WT, (KG)
I OCC. SUCC .SETS
I OOH.5UCC.SC rs
CATCH/SET (HT)
CATCH/SUCC.SC T(HT)
CATCH/DAY IN Z!INE
SPECIES 1
Bl GE YE
TOTAL CATCH (HT)
I per Month
AVERAGE. WT. (KG)
4.90
1 occ.succ.sns
I OOH,SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC.SET(HT)
CATCH/DAY IN Zill£
CALCULATED
fR~
.14
.15
.oe
SPC Sl.H4ARl(S
.09
.JO
.06
.u
.lJ
.06
3
J
5.JO
119
4.00
11
.28
.28
.20
• 38
.39
.25
6.00
6
0
.09
.J2
.06
.OJ
.04
.02
.OJ
.OJ
.OJ
.15
.16
.10
34
JAPANESE PURSE SEINE CATCH srnttARY
1982
JAN
fEB
HAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
OEC
TOTAL
NUHOCR SETS
I per Month
241
9
287
11
178
7
86
7)
3
86
67
187
7
315
12
428
16
294
11
430
16
2672
NO. SUCCESSrUL SET
I per Month
216
10
222
JO
94
4
45
2
66
82
67
3
J05
5
246
11
383
18
262
12
377
17
2165
NO. DAYS IN ZONE
I per Month
326
9
438
12
300
8
161
4
160
4
no
123
n
411
11
555
15
3777
'
41'
11
499
'
261
7
22J8
6
4JJO
11
7)95
19
4779
12
6028
15
J9659
- - --------- .. ---- ---- - .. - - - - - - - - - .... - - - - - - - - - - - - - - - - - -- -
SPECIES:
'
3
SKIP JACK
TOTAL CATCH (MT)
I per Month
4141
10
3877
10
1144
3
1069
J
1768
4
1822
5
J068
AVERAGI'. WT, (KC)
2. 20
2.40
2. 70
2.00
2.50
2.10
l.80
2.JO
2.10
2.00
1.90
2.00
2.10
94
79
87
67
68
55
93
71
97
96
84
75
92
95
76
59
91
69
96
86
97
84
97
80
92
77
I 1.19
19.18
12. 71
.1'.Sl
17.47
8.86
6.43
12 .18
J.82
12.44
2J. 76
6.64
24. 22
26. 79
11.05
21.19
22.22
14.02
H.95
15.95
8.69
11.97
21.32
8. 58
D.n
17 .61
10.49
17. 20
19.)1
14 .82
16,26
18. 25
11.63
u.02
15.99
J0.07
18. J2
8J6
)47
2
1889
12
1838
11
2211
14
1J90
2056
16135
5.4?
I OCC.SUCC.SETS
I OOH.SUCC.SETS
CATCH/SET (MT)
CATCH/SUCC.SE T(MT)
CATCH/DAY IN ZlJI£
SPECIESr
'
JO.SI
YELLOWflN
TOTAL CATCH (MT)
I per Month
1831
11
2157
840
5
301
2
4J9
lJ
AVERAGE WT, (KC)
4. 70
7.90
16.00
6.30
7.40
7.20
4.60
11.10
7.90
5.50
·ea
82
25
69
43
76
22
79
6
96
17
90
9
91
35
78
21
82
9
85
17
7.60
8.48
5.62
7.52
9. 72
4.9J
4. 72
8.94
2.80
3.50
6.69
1.87
6.02
6.66
2. 75
9. 7J
10.20
6.44
5.18
5.18
2.8J
10.11
18,00
7 .24
5.84
7.48
4.46
19
4
5.40
I OCC.SUCC.SETS
I OOM.SUCC.SETS
CATCtl/SET (HT)
CATCH/SUCC.SET(MT)
CATCH/DAY lN Z!Jt£
SPECIES:
u.es
'
lJ
5.30
6.50
JO
86
11
84
16
5.17
5. 78
4.44
4.73
5.H
J.J9
4. 79
5.46
J. 71
6.04
7.46
4.28
81
18
90
20
7J
16
JOl
443
5.60
4.60
4.80
5.00
4.90
12
JO
7
0
.25
.28
.18
.24
.27
.19
.17
.21
.12
BICE YE
TOTAL CATCH (HT)
I per Month
lJ
3
AVERAGE WT. (KC)
6.JO
5J
12
4.00
5.00
s occ.succ.sc1s
4.20
4.00
4. 70
9
10
23
I OOH.SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC.SET(MT)
CATCH/DAY IN ZONE
.06
.07
.04
CALCULATED rRCJ4 SPC SlH4ARIZEO
.01
.01
.01
.02
,OJ
.01
• 7J
.01
.34
.OJ
.OJ
.02
.12
.12
.07
.11
.19
.08
.26
.JJ
.20
.22
.24
.19
35
JAPANESE PURSE SEINE CATCH SU'*'ARY
198J PARTIAL ONLY
..........................................................................................................
SEP
OCT
NOV
occ
TOTAL
J/IH
FEB
HAR
APR
HAY
JUN
Nll41£R SETS
II per Month
J98
213
19
16
1
}2
198
J9
J
JO
NO. SOCCESSFUL SET
I per Month
J25
181
22
9
16
z
89
11
25
J
162
20
807
~
NO. DAYS IN Z!JIE
I per Month
6J2
JO
387
24
24
1
60
4
246
15
56
3
2J9
15
1645
--- --------- ------- - -
SPEC IES1
)6
l
Jll.
AUG
-------------218
-----------1114
20
SKIPJACK
TOT AL CATCH (HT)
S per Month
5970
J4
26))
15
198
1
JOO
2
2099
17
671
48JJ
28
17504
AVERAGE WT. (KG)
2.20
2.20
2.50
2.50
2.JO
2.80
2.50
2.JO
97
Bl
95
76
100
44
81
Jl
90
78
100
92
98
90
96
00
15.ob
18.37
9.45
12. J7
14.55
6 . 81
12 . 38
22.00
8. 25
9.38
18. 75
5.00
14.65
JZ ,58
11. 79
17. 21
26.84
11.99
22.17
29 .84
20.ZJ
15. 72
21. 70
10.65
!: OCC.SUCC.SETS
!: OOH.SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC. SET (HT)
CATCH/DAY IN ZIM
SPECIESr
YELLOWFIN
TOT AL CATCH (HT)
I per Month
1499
JO
081
17
247
5
645
lJ
914
18
50
1
005
16
5041
AVERAGE WT. (KG)
4.80
5.20
9.50
16.60
11.JO
4.10
6.20
6 . 60
BJ
7Z
12
78
44
81
SJ
11
6)
IA
J2
4
56
6
70
12
'· 77
4.62
2. JO
4.14
4.87
2. 28
15.44
27 .4S
10. JO
20.16
40. J2
10. 75
4 .62
J0.27
J. 72
1.29
2.00
.90
J, 70
4.97
J. J7
4 , SJ
6, 25
J.07
" occ.succ.srrs
11 OOH.SUCC.SETS
CATCH/SET (HT)
CATCH/SUCC.SE T(HT)
CATCH/DAY IN ZONE
SPECIES1
BIGEYE
TOTAL CATCH (HT)
I per Month
48
66
40
14
8
J7
22
165
29
AYERACE WT. (KG)
4.JO
4.90
6.00
5.90
4.90
.JI
.oe
.18
.16
.06
.17
.23
.16
.15
.21
.11
I ace. succ. SETS
I OOM.SUCC . SETS
CATCH/S[T (HT)
CATCH/SUCC. SET (HT )
CATCH/DAY IN ZONE
6
.lJ
.15
.08
CALCUl.ATED rR[)f SPC SUlot4ARIES
.n