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Argyrosomus hololepidotus 

Scope: Global
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Perciformes Sciaenidae

Scientific Name: Argyrosomus hololepidotus
Species Authority: (Lacepède, 1801)
Common Name(s):
English Madagascar Kob, Madagascar Meagre
French Maigre Du Sud
Spanish Corvina Del Sur

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(ii,iii,v)+2ab(ii,iii,v) ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Heemstra, P.C. (South African Institute for Aquatic Biology)
Reviewer(s): Donaldson, T.J. & Edgar, G. (Coral Reef Fishes Red List Authority)
Justification:
Although fisheries data and fishery-independent data appears non-existent for this species. This species’ large size, known-life history traits, coupled with what appears to be considerable fishing pressure on all fish species applied by an expanding human population within the range of the species all strongly suggest that this species is at considerable risk of extinction. The extent of occurrence and area of occupancy are both within the threshold levels for Endangered, there are less than five locations and there is ongoing decline due to fishing activities.

Geographic Range [top]

Range Description:Endemic to the southeast coast of Madagascar. The extent of occurrence is <5,000 km² and the area of occupancy is <500 km².
Countries occurrence:
Native:
Madagascar
FAO Marine Fishing Areas:
Native:
Indian Ocean – western
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population is estimated to possibly number less than 10,000 mature individuals which are all in a single subpopulation which is undergoing continuing decline (could qualify as Vulnerable under criterion C2a(ii) on the basis of this). Current declines are suspected to be about 10% over the last three generations. Generation length is not known, but similar large members of this family are distinguished by relatively long lifespans and long generation lengths.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Juveniles occur in mangroves and estuaries. Adults are found off sandy beaches, in estuaries, and in shallow water. This species might migrate and form spawning aggregations.

It is a benthic carnivore feeding upon fishes, crustaceans and molluscs. Both sexes have drumming muscles.
Systems:Marine

Threats [top]

Major Threat(s): Fisheries data and fishery-independent data appears non-existent for this species, however, it is likely to be caught both deliberately and accidentally as bycatch. The species is eaten by local people (primarily subsistence consumption, but there is some trade).

The inshore area and estuaries are also increasingly being impacted by various pollutants as a result of the expanding human population in the region. This species has a low capacity to tolerate impacts without irreversible change.

Conservation Actions [top]

Conservation Actions: A variety of conservation actions are needed from basic research on the species, local legislation and management, protected areas, etc.

Classifications [top]

9. Marine Neritic -> 9.4. Marine Neritic - Subtidal Sandy
suitability:Suitable  
9. Marine Neritic -> 9.10. Marine Neritic - Estuaries
suitability:Suitable  
10. Marine Oceanic -> 10.1. Marine Oceanic - Epipelagic (0-200m)
suitability:Suitable  
12. Marine Intertidal -> 12.7. Marine Intertidal - Mangrove Submerged Roots
suitability:Suitable  
1. Land/water protection -> 1.1. Site/area protection
1. Land/water protection -> 1.2. Resource & habitat protection
2. Land/water management -> 2.1. Site/area management
3. Species management -> 3.1. Species management -> 3.1.1. Harvest management
3. Species management -> 3.1. Species management -> 3.1.2. Trade management
4. Education & awareness -> 4.3. Awareness & communications
5. Law & policy -> 5.1. Legislation -> 5.1.2. National level
5. Law & policy -> 5.1. Legislation -> 5.1.3. Sub-national level
6. Livelihood, economic & other incentives -> 6.1. Linked enterprises & livelihood alternatives

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.1. Housing & urban areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Residential & commercial development -> 1.2. Commercial & industrial areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Residential & commercial development -> 1.3. Tourism & recreation areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

5. Biological resource use -> 5.4. Fishing & harvesting aquatic resources -> 5.4.1. Intentional use: (subsistence/small scale) [harvest]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

5. Biological resource use -> 5.4. Fishing & harvesting aquatic resources -> 5.4.4. Unintentional effects: (large scale) [harvest]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

5. Biological resource use -> 5.4. Fishing & harvesting aquatic resources -> 5.4.6. Motivation Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.1. Domestic & urban waste water -> 9.1.3. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.2. Industrial & military effluents -> 9.2.3. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.4. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

0. Root -> 100.1. OLD 1.1.1-Policy-base actions->Management plans->Development
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

Bibliography [top]

Griffiths, M.H. and Heemstra, P.C. 1995. A contribution to the taxonomy of the marine fish genus Argyrosomus (Perciformes: Sciaenidae), with descriptions of two new species from southern Africa. Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology No. 65: 1-40.

IUCN. 2007. 2007 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 12th September 2007).


Citation: Heemstra, P.C. (South African Institute for Aquatic Biology). 2007. Argyrosomus hololepidotus. The IUCN Red List of Threatened Species 2007: e.T63570A12692390. . Downloaded on 01 October 2016.
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