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Growth, mortality and exploitation of bigeye scad, Selar crumenophthalmus off Mumbai, north-west coast of India

Published online by Cambridge University Press:  21 September 2015

Debabrata Panda ,
A. K. Jaiswar ,
Soma Das Sarkar  and
S. K. Chakraborty
Debabrata Panda*
Affiliation:
ICAR Central Inland Fisheries Research Institute, Barrackpore, Kolkata – 700 120, West Bengal, India
A. K. Jaiswar
Affiliation:
ICAR Central Institute of Fisheries Education (Deemed University), 7-Bungalows, Versova, Andheri (West), Mumbai – 400 0061, Maharashtra, India
Soma Das Sarkar
Affiliation:
ICAR Central Inland Fisheries Research Institute, Barrackpore, Kolkata – 700 120, West Bengal, India
S. K. Chakraborty
Affiliation:
ICAR Central Institute of Fisheries Education (Deemed University), 7-Bungalows, Versova, Andheri (West), Mumbai – 400 0061, Maharashtra, India
*
Correspondence should be addressed to:D. Panda, ICAR Central Inland Fisheries Research Institute, Barrackpore, Kolkata – 700 120, West Bengal, India email: debapnd@yahoo.co.in
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Abstract

An investigation was carried out to study the growth, mortality and exploitation of bigeye scad, Selar crumenophthalmus off the Mumbai coast during September 2008 to August 2009. The von Bertalanffy growth equation was derived as Lt = 310 mm [1−exp {−1.4 year−1 × (t−(−0.059 year))}] with the growth performance index (ø’) of 3.13. The fishable lifespan of the species was 2+ years in Mumbai waters. Bigeye scad attains total length of 240 and 293 mm during its first and second year of life. The size at first capture (L c) was estimated as 240 mm (1+ year). The recruitment was continuous and throughout the year with a single pulse during August. Nearly 50% of the recruitment took place during August and September. The total, natural and fishing mortality rates were 4.62, 2.21 and 2.41 year−1, respectively. The estimated exploitation ratio (0.52) was very close to the optimum value of 0.5. Hence, the stock can be considered as optimally over-exploited in Mumbai waters.

Keywords

AgeBigeye scadgrowthmortalityexploitationMumbai
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 96 , Issue 7 , November 2016 , pp. 1411 - 1416
Copyright
Copyright © Marine Biological Association of the United Kingdom 2015 

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