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Title: | Ray fishery by trawlers off Chennai and some aspects of biology of the scaly whipray Himantura imbricata (Bloch & Schneider, 1801) |
Other Titles: | Not Available |
Authors: | Kizhakudan,Shoba Joe Mohanraj,G Batcha,Hameed Rajapackiam,S |
ICAR Data Use Licennce: | Not Available |
Author's Affiliated institute: | Not Available |
Published/ Complete Date: | 2010 |
Project Code: | Not Available |
Keywords: | Chennai ray fishery Himantura imbricata disc width-weight relationship gut contents |
Publisher: | MBAI, Cochin |
Citation: | Not Available |
Series/Report no.: | Not Available |
Abstract/Description: | Rays are important components in the elasmobranch landings by different gears at Chennai fisheries harbour, contributing about 75.4% to the annual average elasmobranch landings. The annual average catch of rays during 2002-‘07 was 588.3 t and the maximum catch of 1297.4 t was recorded in the year 2002. Eleven species contributed a major portion to the landings of rays by trawlers at Chennai, among which Himantura jenkinsii dominated the catch, forming 38.6% and H. imbricata, 8.0%. The disc width (DW) range of H. imbricata in the landings was 110-229 mm and 130-289 mm for males and females, respectively. The annual average mean size was greater in females. The annual average sex ratio (M:F) was 1:1.11. The disc width-weight relationships were W = 0.00022DW2.676 and W = 0.00005DW2.965 for male and female, respectively. Analysis of covariance showed that the slopes differed significantly, at 5% level, between the sexes. More than 95% of fishes sampled were in wellfed condition. Analysis of gut contents revealed H. imbricata to be a benthic carnivore feeding mostly on small crustaceans, cephalochordates, molluscs, polychaetes and small fishes. |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Journal of the Marine Biological Association of India |
Volume No.: | 52 |
Page Number: | 92-95 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | http://eprints.cmfri.org.in/5841/1/12._Sho.pdf |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/62679 |
Appears in Collections: | FS-CMFRI-Publication |
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