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Biology and stock assessment of Tachysurus jella (Day) from Mumbai waters

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Relation http://eprints.cmfri.org.in/114/
 
Title Biology and stock assessment of Tachysurus jella (Day)
from Mumbai waters
 
Creator Raje, S G
Dineshbabu, A P
Das, Thakur
 
Subject Stock Assessment
 
Description Biological parameters such as length-composition, food and feeding, length-weight relations and growth of Tachysurus jella
was studied using the data collected during 1987-2003. The occurrence of empty stomach was high (70%). Stomach content
analysis revealed that the fish is a carnivore feeding mainly on bottom dwelling crustaceans (Preponderance Index, PI : 97.3)
such as Squilla spp. (PI: 39) and crabs (PI: 35). The length-weight relationship was Log W = -5.7938 + 3.4426 Log L (r =
0.96). Estimated values of L∞ and K were 518 mm and 0.65yr-1 respectively. It was estimated that T. jella reaches 278 mm at
the end of one year and 377 mm in two years. The longevity was estimated to be 4 to 4 ½ years. Stock assessment of T. jella
during 1987-1999 indicated that the stock was overexploited (E = 0.73). Higher fishing effort and sharp reduction in yield
during 2000 - 2004 confirmed that the species was under heavy fishing pressure and regulatory measures have to be imposed
to sustain and improve the fishery of this species.
 
Publisher CMFRI
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/114/1/Rajee.pdf
Raje, S G and Dineshbabu, A P and Das, Thakur (2008) Biology and stock assessment of Tachysurus jella (Day) from Mumbai waters. Indian Journal of Fisheries, 55 (4). pp. 295-299.