نویسنده
گروه شیلات،دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان،
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسنده [English]
This study was conducted to investigate some aspects of the reproductive system of Exopalaemon styliferus (H. Milne Edwards, 1840) population in downstream Bahmanshir River during summer, 2008. A total of 472 specimens collected from sampling site?? stations, males and females comprised 55.4% and 43.6%, respectively (14.4% ovigerous female and 30.1% non-ovigerous females). The minimum size of males with appendix masculina was 2.69 cm body length and 0.4 g body weight and in females with eggs was 4.06 cm-BL and 1.54 g-W. The mean, minimum and maximum fecundity were 914, 242 and 1755, respectively. Reproductive output (RO) of E. styliferus varied 8-21% (13% on average) of female wet weight. Mean egg size (shortest × longest axis) at early and late embryonic development stages was (0.67 × 0.86) and (0.72 × 0.97) mm, respectively. The relationship between fecundity with body length (BL) and weight (W) was positive allometric and with carapace length (CL) was isometric.
کلیدواژهها [English]
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