Record Details

Scaly Whipray Brevitrygon walga

CMFRI Repository

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Field Value
 
Relation http://eprints.cmfri.org.in/13640/
https://www.iucnredlist.org/species/104176764/111015783
http://dx.doi.org/10.2305/IUCN.UK.2017-2.RLTS.T104176764A111015783.en.
 
Title Scaly Whipray
Brevitrygon walga
 
Creator Simpfendorfer, Colin A
Moore, Alec B M
Elhassan, I
Owfi, Fereidoon
Akhilesh, K V
 
Subject Ray fisheries
Conservation
 
Description The Scaly Whipray (Brevitrygon walga) is a very small (to 32 cm disc width) whipray species whose true
range is poorly-known due to taxonomic issues. There are various forms across its range (Red Sea to
India), but until taxonomy is resolved, the forms in the Arabian Seas region are treated as a single
species for the current assessment. This species appears to be very common in waters less than 40 m
deep, including in intertidal areas. Given its size it is likely to have a productive life history, but this needs
to be confirmed with species-specific research. It is regularly caught in shallow water trawls and is
normally discarded at sea in the western part of its range, but landed in considerable numbers in the
eastern part (i.e., India). Overall, fishing pressure is increasing across its habitat, and declines in batoids
have been documented in India. At one landing site, catches have been stable over a 15 year period
after an initial increase. However, over that same time period, trawl effort doubled. Overall, declines of
< 30% are suspected over the last three generations (~33 years), and with ongoing fishing pressure,
further population declines are suspected over the next three generations (2017-2050); the species is
therefore assessed as Near Threatened (nearly meeting VU A2d+3d).
 
Publisher International Union for Conservation of Nature and Natural Resources
 
Date 2017
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/13640/1/IUCN%20Red%20List%20of%20Threatened%20Species%202017_Scaly%20Whipray%2C%20Brevitrygon%20walga.pdf
Simpfendorfer, Colin A and Moore, Alec B M and Elhassan, I and Owfi, Fereidoon and Akhilesh, K V (2017) Scaly Whipray Brevitrygon walga. The IUCN Red List of Threatened Species 2017.