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Title: Population dynamics of Randall’s threadfin bream Nemipterus randalli from Pakistani waters, Northern Arabian Sea
Authors: Kalhoro, Muhsan Ali
Tang, DanLing
Ye, HaiJun
Morozov, Evgeny
Liu, Qun
Memon, Khadim Hussain
Kalhoro, Muhammad Talib
Keywords: Arabian Sea;Nemipterus randalli;Fish stock assessment;Growth;Mortality
Issue Date: Mar-2017
Publisher: NISCAIR-CSIR, India
Abstract: The N. randalli fish data consist of 1141 pair of length weight relationship and 24312 length frequencies were measured during 2009 - 2010 survey. The maximum length and weight were 25 cm and 251 g, respectively. The length-weight relationship were a = 0.035, b = 2.744 and R2 = 0.972. The asymptotic length (L) and growth coefficient (K) were estimated to 26.25 cm and 0.320 year-1, respectively. The total mortality (Z) was 1.25 year-1. The natural mortality (M) was 0.863, hence the fishing mortality (F) was Z–M = 0.387 year-1 for N. randalli. The yield per recruit analysis indicated that when tc was assumed to be 2, Fmax was estimated at 1.3 and F0.1 at 1.3; while tc was assumed to be 1, Fmax was estimated at 1.1 and F0.1 at 0.95. Currently age at first capture is about 1 year and Fcurrent was 0.387, therefore, Fcurrent was smaller than F0.1 and Fmax. The results during present study indicate that current fishery stock is in sustainable state. However, it is suggested that take some management steps to maintain the stock of N. randalli in Pakistani waters, Northern Arabian Sea.
Page(s): 551-561
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.46(03) [March 2017]

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