Map_thumbnail_large_font

Rhizoprionodon oligolinx

Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA CHONDRICHTHYES CARCHARHINIFORMES CARCHARHINIDAE

Scientific Name: Rhizoprionodon oligolinx
Species Authority: Springer, 1964
Common Name/s:
English Grey Sharpnose Shark

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2003
Date Assessed: 2003-04-30
Assessor/s: Simpfendorfer, C.A. (SSG Australia & Oceania Regional Workshop, March 2003)
Reviewer/s: Fowler, S. & Cavanagh, R.D. (Shark Red List Authority)
Justification:
This is an abundant inshore species across southern Asia, from the Arabian Gulf at least to northern Australia, possibly southern Japan. It is exploited by artisanal, subsistence and commercial fisheries throughout its range, including gillnet, trawl and longline fisheries. In parts of its range exploitation rates are relatively high. However, it is assumed to have a productive life history, like those of better-known species in this genus which enables it to sustain relatively high levels of fishing pressure.

Geographic Range [top]

Range Description: This species occurs from the Arabian Gulf to the Gulf of Carpentaria in northern Australia and possibly southern Japan in inshore continental shelf waters.
Countries:
Native:
Australia (Northern Territory, Queensland); Cambodia; India; Indonesia; Iran, Islamic Republic of; Malaysia; Pakistan; Palau; Singapore; Sri Lanka; Thailand
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Indian Ocean – western; Pacific – northwest; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There are little or no data available on population size anywhere within its range, and there are no indices of trends in population abundance. It is known only from a limited number of specimens from northern Australia, where it is probably rare, and may be a stray from Indonesian waters.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The biology of this species is poorly known. However, it is likely to have a life history very similar to the Australian sharpnose shark (Rhizoprionodon taylori) which grows to a similar size and has a similar appearance. It is a small shark born at 21 to 26 cm, mature at 35 to 40 cm, and grows to around 70 cm (Last and Stevens 1994). Mature females produce litters of 3 to 5 young, presumably every year (Compagno 1984). Assuming that the life history is similar to that of R. taylori it is assumed to be productive and able to sustain relatively high levels of fishing pressure.
Systems: Marine

Threats [top]

Major Threat(s): This species is probably exploited by inshore artisanal, subsistence and commercial fisheries through most of its range. Manjaji (2002) reported it from fish markets in Sabah. No data are available on the magnitude of catches or the impact of fishing on the populations.

Conservation Actions [top]

Conservation Actions: There are currently no conservation measures in place for this species.
Citation: Simpfendorfer, C.A. (SSG Australia & Oceania Regional Workshop, March 2003) 2003. Rhizoprionodon oligolinx. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided