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Age and growth of Himantura bleekeri (Blyth) and fishery for rays off Tuticorin

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Relation http://eprints.cmfri.org.in/4620/
 
Title Age and growth of Himantura bleekeri (Blyth) and fishery for rays off Tuticorin
 
Creator Marichamy, R
Mohamad Kasim, H
Ameer Hamsa, K M S
Rajapackiam, S
 
Subject age and growth
Ray fisheries
 
Description An estimated annual average total catch of 900.9 t of rays were landed at Tuticorin during 1991 -92 to 1995-96. The small mechanised trawlers landed
778.8 t at the catch rate of 24.2 kg/unit which constituted 3.3% of the total catch by trawlers and the bottom-set gillnets landed 122.1 t at the catch rate
of 73.9 kg/unit which formed 69.7% of the total catch by bottom set gillnets. The abundance of rays in the trawling grounds increased from April to
reach a peak in September and then fluctuated. Such a definite trend was not seen in the abundance of rays in the grounds of bottom set gillnets and
in general the abundance of rays was good in almost all the months. As many as nine and odd spec ies sup ported thefishery an d in both the gears
Hin~uriruru bleekeri was the dominant species recording 34.1 % in trawlnet and 34.5% in bottom-set gillnets and the second dominant species was
H. aurrurk. The sex wise age and growth of H.hleekcri is studied from length frequency data collected from trawl and bottom-set gillnet landings.
The growth of this species is described by the von Bertalanffy growth equation : lt = 1242 (1 - e-0.5612(t+0.0103)f)o r males and lt = 1303 (1 - e-0.505
(t+0.0155)) for females.
 
Date 1999
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/4620/1/29.pdf
Marichamy, R and Mohamad Kasim, H and Ameer Hamsa, K M S and Rajapackiam, S (1999) Age and growth of Himantura bleekeri (Blyth) and fishery for rays off Tuticorin. In: The Fourth Indian Fisheries Forum, Proceedings, 24-28 November, 1996, Kochi.