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Biology and exploitation of Trichiurus lepturus Linnaeus from Visakhapatnam waters

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Relation http://eprints.cmfri.org.in/198/
 
Title Biology and exploitation of Trichiurus lepturus
Linnaeus from Visakhapatnam waters
 
Creator Reuben, S
Vijayakumaran, K
Achayya, P
Prabhakar, R V D
 
Subject Fish biology
 
Description Length-weight relationship, relative condition factor, growth, maturity,
mortality, exploitation, fishery, food and feeding and sex ratio of Trichiurus
lepturus from Visakhapatnam were studied. Length-weight relationship
obtained for male and female was, male : W = 0.000273 L3245862 (r=0.9961)
and female : W = 0.000223 L3298627 (r = 0.9950). Growth parameters estimated
for von Bertalanffy's growth function were, LM = 106.8251 cm, K = 0.6117 per
year and to = -0.1399 years. The fish attained maturity at 42.5 cm and has
a longevity of 4.9 years. The total mortality and fishing mortality were
estimated as 2.4170 and 1.5236 respectively. The exploitation ratio, E = 0.6304
and exploitation rate, U = 0.5741, indicated overexploited state of the stock.
The seasonal abundance in major gears and the annual abundance in the small
trawler landings during the decade 1982-'91 are also presented. Growth
performance index, PHI1 (') for this species was calculated based on five sets
of parameters given by different authors and a mean ' value was arrived at.
The fish was found to be a voracious carnivore, often exhibiting cannibalism.
Incidence of differential fishing noticed in this case is briefly discussed.
 
Publisher CMFRI/ICAR
 
Date 1997
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/198/1/Article_03.pdf
Reuben, S and Vijayakumaran, K and Achayya, P and Prabhakar, R V D (1997) Biology and exploitation of Trichiurus lepturus Linnaeus from Visakhapatnam waters. Indian Journal of Fisheries, 44 (2). pp. 101-110.