Document Type : Physiology (Animal)
Basic Sciences Faculty , Department of Biology, Lahijan Islamic Azad University.
Basic Sciences Faculty , Department of Biology, Lahijan Islamic Azad University
Caspian sea contains two species with scientific names Palaemon adspersus and Palaemon elegans. 448 pieces of shrimp P. adspersus and P. elegans from April to Desambr2014 in the coastal water of nour Morphometric to compare some properties of two species of the genus to species and gender Palamon to better understand the biological properties of samples if the sampling were Dreach . Total length, Carapace length, Propod length, Weight total body, fecundity was measured. The results showed that the ratio of female to male sex P. adspersus than P. elegans morphometric traits showed significant differences (P<0/05). P. adspersus and females grow any more than any P. elegans were male sex, as well as P. elegans the relative fecundity was higher than any P. adspersus. Sex ratio in P. adspersus and P. elegans respectively (29% male, 51% female) , and (24% male,76% female) are ratio 44.64% P. adspersus 55.36% It was P. elegans. Both species spawn in significant differences in ovarian weight, egg number and Egg Weight were compared to each other (P<0/05). The mean ovarian weight, egg number and developmental stage Egg Weight (EarlyΠ) in P. elegans and P. adspersus respectively 0/104 (gr), 514 number, 2/01 (mm) and 0/122(gr), 589 number, 52/2 (mm) and the developmental stage (LateΠ) in order to arrange P. elegans and P. adspersus 0/137 (gr),643 number, 2/38 (mm) and 0/158 (gr), 589 number 2/99 (mm). The P. adspersus according to morphometric traits and ovarian weight more, more eggs than P. elegans produced.