Hippocampus jayakari 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Syngnathiformes Syngnathidae

Scientific Name: Hippocampus jayakari Boulenger, 1900
Common Name(s):
English Jayakar's Seahorse
Taxonomic Source(s): Boulenger, G. A. 1900. Description of a new sea-horse (Hippocampus) from Muscat. Annals and Magazine of Natural History (Series 7) 6(31): 51-52.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2003
Date Assessed: 2003-04-30
Needs updating
Assessor(s): Project Seahorse
Reviewer(s): Marsden, A.D., Foster, S.J. & Vincent, A.C.J. (Syngnathid Red List Authority)
There are no published data about population trends or total numbers of mature animals for this species. There is very little available information about its extent of occurrence or its area of occupancy. There have been no quantitative analyses examining the probability of extinction of this species. As a result, the assessors have insufficient data to properly assess the species against any of the IUCN criteria.

Hippocampus jayakari previously was listed in 1996 as VU A2cd under the 1994 criteria. This assessment was based on suspected past declines in occupancy, occurrence and habitat, as well as on potential levels of exploitation. In reassessing the species under the new criteria and with greater taxonomic understanding we find that no appropriate data on biology and ecology, habitat, abundance or distribution are available for this species. Further research is needed. Assessed as Data Deficient under the new criteria.
Previously published Red List assessments:

Geographic Range [top]

Countries occurrence:
Israel; Oman; Pakistan
FAO Marine Fishing Areas:
Indian Ocean – western
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:During Project Seahorse trade surveys conducted between 2000–2001, eight of the 11 fishers surveyed in Pakistan reported a 50% decrease in seahorse catch in 1999, while the remaining three fishers had noticed no change (A. Perry, unpublished data). However, it is unknown how much of this catch, if any, is comprised of H. jayakari.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Hippocampus jayakari has been caught at depths of 2–3 m. It is found in beds of seagrasses such Halophila spp. (Lourie et al. 1999).

This species may be particularly susceptible to decline. The limited information on habitat suggests they inhabit shallow sea-grass beds (Lourie et al. 1999) that are susceptible to human degradation, as well as making them susceptible to being caught as bycatch. All seahorse species have vital parental care, and many species studied to date have high site fidelity (Perante et al. 2002, Vincent et al., in review), highly structured social behaviour (Vincent and Sadler 1995), and relatively sparse distributions (Lourie et al. 1999). The importance of life history parameters in determining response to exploitation has been demonstrated for a number of species (Jennings et al. 1998).

Threats [top]

Major Threat(s): Trade surveys conducted by Project Seahorse between 2000–2001 indicated that the trade of seahorses in Pakistan appears to be relatively small, and is mostly limited to local collection for aquarium use (A. Perry, unpublished data). Israel reported that there is no trade of seahorses in the country, nor are there exports (CITES AC18 Doc 18.1). The size of the trade in this species in Oman, if any, is unknown.

The species might also be threatened due to the vulnerability of its shallow habitats to human influence. These habitats are often degraded by humans, and animals located in the habitat are vulnerable to incidental capture in other fisheries

Conservation Actions [top]

Conservation Actions: The entire genus Hippocampus was listed in Appendix II of CITES in November 2002. Implementation of this listing will begin May 2004. Further research on this species biology, ecology, habitat, abundance, and distribution is needed.

Citation: Project Seahorse. 2003. Hippocampus jayakari. The IUCN Red List of Threatened Species 2003: e.T10074A3160135. . Downloaded on 20 November 2017.
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