نوع مقاله : محیط زیست جانوری
نویسندگان
1 لابراتوار ماهی شناسی، دانشکده جانورشناسی، آکادمی علوم آذربایجان، باکو، جمهوری آذربایجان، صندوق پستی: 1073
2 موسسه تحقیقات شیلات ایران، تهران، صندوق پستی:6116 – 14155
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Pomfret is one of the valuable and economic fishes in the Persian Gulf. According to observations and reports in the last 10 years, amount of fishing and it’s average size in the fishermen net is strongly decreased. The problems in it’s artificial reproduction, make impossible the restoration by reproduction way. For this reason accurate evaluation of population and then store management according to principles of population dynamic and it’s biology in the stable exploitation is necessary order. For this purpose performed extensive study between 2007 – 2013 years, that in this section is accounted growth coefficient, natural death amount, total death amount, fishing coefficient amount and then exploitation coefficient for evaluation; has been studied sexual testis and fishes puberty stages for store management. Growth coefficient is accounted during study 0.4, and after accounting total death, natural death and fishing coefficient, exploitation coefficient amount is 0.1296 that shows store reduction and critical status of population. The fish has a long spawning period from May to November (p<0.001). And the greatest sexual activity is in the female fishes with standard length 25.5cm and in the male fishes with standard length 21.5 cm (p<0.01).
کلیدواژهها [English]
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