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Observations on some aspects of biology and population dynamics of the Scad Decapterus Russelli (Ruppell)(Carangidae) in the trawling grounds off Kakinada

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Title Observations on some aspects of biology and population dynamics of the Scad Decapterus Russelli (Ruppell)(Carangidae) in the trawling grounds off Kakinada
 
Creator Murty, V Sriramachandra
 
Subject Population Dynamics
Carangids
 
Description Decapterus russelU (Ruppell)* is abundaat in relatively deeper waters and forms 80-90 % of carangid
catches by trawlers. The von Bertalanffy growth parameters are estimated as Loe =• 232.3 mm, K =-
1.08 per year and to =» —0.08 year. The length-weight relationship can be described by the equation
log W (g) = —5.93433+3.40764 log L (mm). The length and age at first maturity are estimated as
150mmand0.88 year respectively. This species spawns offKakinada during December-August. The
different mortality rates are estimated as Z = 6.65, M «= 1.90 and F = 4.75 and the length and age
at first capture as 158 mm and 0.98 year respectively. The yield per recruit analysis shows that: with
t« above 0.6 the Yw/R increases with increased F without reaching maximum. The highest Yw/R,
however, is obtained with tc at 0.6 only.
 
Publisher MBAI
 
Date 1991
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1172/1/JMBAI_33%281%262%29-396-408.pdf
Murty, V Sriramachandra (1991) Observations on some aspects of biology and population dynamics of the Scad Decapterus Russelli (Ruppell)(Carangidae) in the trawling grounds off Kakinada. Journal of the Marine Biological Assocation of India, 33 (1&2). pp. 396-408.