Feeding habits and position of great sculpin in the
trophic system of Kamchatka waters
Alexei M. Tokranov1
and
Alexei M. Orlov2
1 - Kamchatka Branch of Pacific Institute of Geography
Far-Eastern Department Russian Academy of Sciences (KBPIG),
Petropavlovsk-Kamchatsky, Russia. E-mail: [email protected]
2 - Russian Federal Research Institute of Fisheries
and Oceanography (VNIRO), Moscow, Russia.
E-mail: [email protected]
Photo courtesy NOAA
RANGE OF GREAT SCULPIN MYOXOCEPHALUS
POLYACANTHOPCEPHALUS IN THE NORTH
PACIFIC OCEAN
Depths inhabited 0-775 m,
mainly <250 m;
Maximum sizes:
Females 90 cm and 10 kg,
Males 52 cm and 3.1 kg,
mainly 30-55 cm and 0.5-2.5 kg
SAMPLING LOCALITIES OF DATA ON GREAT
SCULPIN FEEDING HABITS
1,500 STOMACHS ANALYSED IN THE LAB,
4,000 STOMACHS ANALYSED VISUALLY ON BOARD
6
5
1
4
2
3
Bering
Sea
IMPORTANCE OF MAIN DIETARY ITEMS OF
GREAT SCULPIN (% BY WEIGHT) IN KAMCHATKA
WATERS, 1978-2002
DIET COMPOSITION OF GREAT SCULPIN IN
VARIOUS AREAS OF KAMCHATKA WATERS,
1978-2002
DIET COMPOSITION OF GREAT SCULPIN IN
KAMCHATKA WATERS IN DIFFERENT SEASONS,
1978-2002
IMPORTANCE OF VARIOUS FISH FAMILIES IN
GREAT SCULPIN DIET IN
KAMCHATKA WATERS, 1978-2002
IMPORTANCE OF VARIOUS FISH FAMILIES IN
GREAT SCULPIN DIET IN KAMCHATKA WATERS
IN DIFFERENT SEASONS, 1978-2002
IMPORTANCE OF VARIOUS DECAPOD FAMILIES IN
GREAT SCULPIN DIET IN KAMCHATKA WATERS,
1978-2002
IMPORTANCE OF VARIOUS DECAPOD FAMILIES IN
GREAT SCULPIN DIET IN KAMCHATKA WATERS
IN VARIOUS SEASONS, 1978-2002
DIET COMPOSITION OF GREAT SCULPIN OFF THE
SOUTHWESTERN KAMCHATKA IN DIFFERENT
YEARS, JUNE-JULY
CHANGES OF GIANT SCULPIN DIET
COMPOSITION WITH LENGTH INCREASING
MAY ‐ AUGUST
DECEMBER ‐ MARCH
SCHEME OF GREAT SCULPIN TROPHIC
RELATIONS IN KAMCHATKA WATERS
% by weight
∙∙∙ – < 1%, ‐ ‐ – 1−2%, – ‐ ~20%, ▬ – > 60%
Consumers of 3rd trophic level
Consumers of 2nd trophic level
Phyto‐ and zoobenthotophages
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