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Title: Population structure, growth, mortality and yield per recruit of segestid shrimp, <i>Acetes japonicus </i>(Decapoda: Sergestidae) from the coastal waters of Malacca, Peninsular Malaysia
Authors: Amin, S. M. Nurul
Arshad, A.
Siraj, S. S.
Sidik, B. Japar
Keywords: Population dynamics
Acetes Japonicus
Issue Date: Mar-2009
Publisher: CSIR
Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="metricconverter"> Present study consists the population structure, growth, mortality and relative yield recruit of <i>A. japonicus </i>from the coastal waters of Malacca, Peninsular Malaysia. FISAT software has been used to examine the monthly data. The asymptotic length (L<sub>a</sub>) and growth co-efficient (K) was estimated as 29.08 mm and 1.4 y<sup>-1</sup>. The growth performance index (φ<img src=‘/image/spc_char/right_quote.gif’>)<i> </i>was calculated as 3.073. The exponent (b) of the length-weight relationship was found to be 3.063 (± 0.015). The asymptotic weight was calculated as 187.72 mg. Total mortality coefficient (Z) was estimated at 5.16 yr<sup>-1</sup>. The natural mortality (M) and fishing mortality (F) was calculated as 2.35 yr<sup>-1</sup> and 2.81 yr<sup>-1</sup>, respectively. Exploitation rate (E) of <i>A. japonicus </i>was estimated as 0.54. The recruitment pattern was continuous throughout the year with one major peak. The relative yield per recruit analysis predicted the maximum exploitation rate (E<sub>max</sub>) = 0.52. The current exploitation rate E is slightly higher than predicted E<sub>max</sub>. The stock of <i>A. japonicus </i>was found to be over exploited in the investigated area. </smarttagtype>
Description: 57-68
ISSN: 0379-5136
Appears in Collections:IJMS Vol.38(1) [March 2009]

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