Population Dynamics of Blue Swimming Crab (Portunus pelagicus Linnaeus, 1758) in the Coastal Area of Ban Laem, Ban Laem District, Phetchaburi Province
Abstract
The study on population dynamics of Blue Swimming Crab (Portunus pelagicus Linnaeus, 1758) were estimated using length-frequency data from the coastal area of Ban Laem, Ban Laem District, Phetchaburi Province, Thailand during May 2012 to April 2013. Monthly length frequency data of Blue Swimming Crab were analyzed by FiSAT II. Asymptotic length (L∞) and growth co-efficient (K) were 15.49 cm and 0.45 year-1, respectively. The growth performance index (j/) was 2.03. Total mortality (Z) by length-converted catch curve was 3.69 year-1, of which fishing mortality (F) was 2.36 year-1and natural mortality (M) was 1.33 year-1. The exploitation level (E) of Blue Swimming Crab was 0.64. The recruitment pattern was continuous with one major peak in the months of March to July.
Keywords : population dynamics, Blue Swimming Crab (Portunus pelagicus Linnaeus, 1758),
coastal area of Ban Laem
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