The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T182497A7898029
Ladigesia roloffi, Jelly bean tetra
Assessment by: Lalèyè, P.
View on www.iucnredlist.org
Citation: Lalèyè, P. 2010. Ladigesia roloffi. The IUCN Red List of Threatened Species 2010:
e.T182497A7898029. http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Animalia
Chordata
Actinopterygii
Characiformes
Alestidae
Taxon Name: Ladigesia roloffi Géry, 1968
Common Name(s):
• English:
Jelly bean tetra
Assessment Information
Red List Category & Criteria:
Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published:
2010
Date Assessed:
November 27, 2006
Justification:
It is only known from one location, the type locality Kasewe (Sierra Leone) according to Paugy et al.
(2003) and possibly in a second locality in Liberia according to FishBase. The estimated extent of
occurrence and area of occupancy are less than 5,000 km² and less than 500 km², respectively. The
extent and quality of habitat is undergoing and continuous decline due to mining, urban and
deforestation developments. The species is therefore assessed as Endangered.
Geographic Range
Range Description:
This species is only known from the type locality Kasewe (Sierra Leone), which is said to have been
captured in one of the small water courses belonging to the Gbangbaia basin, a small brook located to
the west of the Jong. It is also reported from Liberia.
Country Occurrence:
Native: Sierra Leone
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
1
Distribution Map
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
2
Population
No available data.
Current Population Trend: Unknown
Habitat and Ecology (see Appendix for additional information)
This monospecific species is a pelagic fish. Maximum size 3.1 cm SL.
Systems: Freshwater
Use and Trade (see Appendix for additional information)
This species is part of the aquarium trade.
Threats (see Appendix for additional information)
The extent and quality of habitat is undergoing a continuous decline due to mining, urban developments
and deforestation.
Conservation Actions
None known.
Credits
Assessor(s):
Lalèyè, P.
Reviewer(s):
Entsua-Mensah, M., Darwall, W. & Smith, K.
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
3
Bibliography
Pan-Africa freshwater assessment references. Currently, full citations for references used in the PanAfrica biodiversity assessments are unavailable on the Red List web site. These will be added to the site
in 2011. We apologise for any inconvenience this causes.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org.
(Accessed: 2 September 2010).
Citation
Lalèyè, P. 2010. Ladigesia roloffi. The IUCN Red List of Threatened Species 2010: e.T182497A7898029.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
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Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent
Rivers/Streams/Creeks (includes waterfalls)
-
Suitable
-
7. Caves and Subterranean Habitats (non-aquatic) -> 7.1. Caves and
Subterranean Habitats (non-aquatic) - Caves
-
Suitable
-
Use and Trade
(http://www.iucnredlist.org/technical-documents/classification-schemes)
End Use
Local
National
International
Pets/display animals, horticulture
No
Yes
Yes
Threats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Threat
Timing
Scope
Severity
Impact Score
1. Residential & commercial development -> 1.1.
Housing & urban areas
Ongoing
-
-
-
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
-
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
-
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
-
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
Ongoing
-
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
2. Agriculture & aquaculture -> 2.1. Annual &
perennial non-timber crops -> 2.1.2. Small-holder
farming
3. Energy production & mining -> 3.2. Mining &
quarrying
5. Biological resource use -> 5.3. Logging & wood
harvesting -> 5.3.5. Motivation
Unknown/Unrecorded
9. Pollution -> 9.3. Agricultural & forestry effluents ->
9.3.2. Soil erosion, sedimentation
-
-
-
-
-
-
-
-
Research Needed
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
5
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Research Needed
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
3. Monitoring -> 3.1. Population trends
Additional Data Fields
Population
Population severely fragmented: No
© The IUCN Red List of Threatened Species: Ladigesia roloffi – published in 2010.
http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T182497A7898029.en
6
The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™