Morphological and Taxonomical Study of Macrobrachium nipponense (De Haan, 1849) in Siyahdarvishan River, Guilan Province

Subject Areas : Journal of Animal Biology

مرجان  تحقیقی ¹ (دانشگاه پیام نور، گروه زیست‌شناسی، تهران، ایران)
شاهرخ  پاشایی راد ² (دانشگاه شهید بهشتی، دانشکده علوم پایه، گروه زیست شناسی، تهران، ایران)
نسیم  هزاوه ³ (دانشگاه اراک، دانشکده علوم پایه، گروه زیست شناسی، اراک، ایران)
حمید  علاف نویریان ⁴ (دانشگاه گیلان، دانشکده منابع طبیعی صومعه سرا، صومعه سرا، ایران)
هدیه  تحقیقی ⁵ (دانشگاه گیلان، گروه کشاورزی، رشت، ایران)

Received: 2014-06-21 Accepted : 2017-05-21 Published : 2013-04-21

Keywords: Taxonomy, Morphology, Guilan, Macrobrachium nipponense, Siyahdarvishan River,

Abstract :

In order to find out possible population differentiations of shrimps in Guilan province, a survey was conducted from Jan. to Apr. 2012 in the three stations of Siyahdarvishan River. 813 specimens were collected for the first time. According to Salman etal. (2006) species description, the specimens were identified as Macrobrachium nipponense and they were confirmed by Oxford University Museum of Natural History in the United Kingdom. Results showed that number of eggs varied from 501 to 3578, Sex ratio of male to female was 1 to 1.4, the number of ventral rostral teeth in males and females were from 0 to 6, and dorsal rostral teeth were 8 to 18 in females and in males were 10 to 18. It seems that habitat differences, geographical and ecological situation are the reason for these results.