Farzaneh Fazeli; Ahmad Savari
Volume 3, Issue 3 , May 2015, , Pages 55-61
Abstract
Abstract The threadfin breams of the genus Nemipterus are commercially important in many parts of the world; therefore, stock parameters such as age, growth and mortality have been examined to manage them properly.The growth parameters of Nemipterus japonicus were studied by using length frequency ...
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Abstract The threadfin breams of the genus Nemipterus are commercially important in many parts of the world; therefore, stock parameters such as age, growth and mortality have been examined to manage them properly.The growth parameters of Nemipterus japonicus were studied by using length frequency data of 763 specimens of this species that were collected monthly by trawl net from Khuozestan Coastal during Jun 2005 to May 2006.FiSAT II program was used to again Pauly regression and their equation, to determine the growth parameters. The Pauly equation indicated L∞= 254.06 for female and 270.42 for male fishes respectively.ELEFAN I program was used to catch Length- Frequency curve and amount of K parameter, K estimated 0.684 and 0.546 in male and female respectively.After gain amount of L∞ and K parameters, by used of this data and FiSAT II program, estimated Natural and Total mortality and with this data Fisheries mortality was calculate. Natural mortality was 0.8 and 0.6 and Total mortality calculated, 2.97 and 1.99 in male and female respectively. Finally Fisheries mortality was 2.17 and 1.39 in male and female respectively.
