Population dynamics of Bombay duck Harpodon nehereus (Hamilton, 1822) of the Bay of Bengal along Bangladesh coast

[摘要] Population parameters ofHarpadon nehereuswere estimated using FiSAT-II. length-frequency data collected from different landing centers along the coast of Bangladesh. The Von Bertalanffy growth parameters L ∞ and K for the species were 45.05 cm and 1.30/year, respectively. The annual rate of natural mortality (M) and fishing mortality (F) were found to be 1.86 and 2.58, respectively. The estimated value of the exploitation rate (E) using the lengthconverted catch curve was 0.58 and E max was found to be 0.582. The recruitment pattern of this species was continuous and two peaks per year. The present investigation clearly showed the over fishing (E > 0.50) condition forH. nehereusin Bangladesh. The estimated length-weight relationship for the combined sex was found to be W = 0.003199 L 3 .Bangladesh J. Zool.45 (2): 101-110, 2017.

[学科分类] 动物科学

[关键词] Asymptotic length;growth coefficient;mortality;virtual population analysis;recruitment pattern;exploitation rate;Harpadon nehereus