Stock Assessment of a Non-Commercial Fish Sciaena coitor (Hamilton, 1822) from Middle Stretch of River Ganga

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• 作者：Anees F. Rizvi ; K. P. Singh ; Niraj Kumar
• 关键词：Stock assessment ; Sciaena coitor ; River Ganges ; Middle stretch ; Virtual population analysis
• 刊名：National Academy Science Letters
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：38
• 期：1
• 页码：9-12
• 全文大小：
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• 作者单位：Anees F. Rizvi (1)
  K. P. Singh (2)
  Niraj Kumar (3)
  
  1. The Institute of Applied Sciences, Allahabad, 211002, India
  2. Department of Zoology, University of Allahabad, Allahabad, India
  3. The National Academy of Sciences, Allahabad, 211002, India
  
• 刊物类别：Science, general; History of Science;
• 刊物主题：Science, general; History of Science;
• 出版者：Springer India
• ISSN：2250-1754

文摘

Based on the length frequency data growth, mortality, and population parameters of Sciaena coitor from the scoop net (mesh size 0.5鈥? cm) catches from middle stretch of Ganga at Allahabad were estimated. The length-weight relationship for pooled data was log W = 76.39315 L2.48487. The asymptotic length (L鈭? and growth coefficient (K) were estimated to be 198 mm, and 0.868 year鈭?, respectively. The total, fishing and natural mortality coefficients were estimated as 3.31, 1.55 and 1.76 respectively while the 鈥楨鈥?0.468 year鈭?. The recruitment was continuous with one peak per year. The L_c50 was obtained at 115 mm. Yield isopleth diagram generated, give optimum yield at E of 0.4 and Lc/L鈭?nbsp;= 0.58. Keywords Stock assessment Sciaena coitor River Ganges Middle stretch Virtual population analysis