Freshwater Crayfish 19(2): 237-241 (2013)
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Fluctuation of Vertebrate-like Steroids in the Hemolymph of Narrow-clawed Crayfish, Astacus leptodactylus (Eschscholtz, 1823)
This study was carried out with the aim of examining the fluctuations of vertebrate-like steroids during the reproductive cycle of female narrow-clawed crayfish, Astacus leptodactylus, from Aras Dam Lake, Western Azerbaijan, Iran. Gonadosomatic indices (GSI) and vertebrate-like steroid (e.g., estradiol-17?, progesterone, and testosterone) levels in the hemolymph were measured in females sampled in June, August, November and January. From June to November, the ovary development was accompanied by increasing levels of estradiol-17? and progesterone in the hemolymph. Testosterone levels did not significantly differ throughout the reproductive cycle. Our results have shown a post spawning increase in both estradiol-17? and progesterone that may be related to multiple spawning in this crayfish species. Estradiol-17? and progesterone, fluctuate in the hemolymph during the reproductive cycle in parallel with the maturation cycle of oocytes, which suggests the possibility of a role for estradiol-17? and progesterone in oocyte development in A. leptodactylus (Eschscholtz, 1823).
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How to Cite
Mirheydari SM, Paolucci M, Matinfar A and Ghasemi S. (2013). Fluctuation of Vertebrate-like Steroids in the Hemolymph of Narrow-clawed Crayfish, Astacus leptodactylus (Eschscholtz, 1823). Freshwater Crayfish 19(2):237-241. doi: 10.5869/fc.2013.v19-2.237
Seyed Mehdi Mirheydari,* Department of Fisheries, Faculty of Agriculture and Natural Resources, , Islamic Azad University , Science and Research Branch, Tehran , Iran, Iran4971857765. E-mail: firstname.lastname@example.org
Marina Paolucci, Department of Biological, geological and Environmental Sciences, University of Sannio, Via Port'Arsa, 11, Benevento, Italy, Italy82100. E-mail: email@example.com
Abbas Matinfar3, Department of Aquaculture, Iranian Fisheries Research Organization, PO. Box 14155-6116, Tehran, Iran, Iran 14155-6116. E-mail: firstname.lastname@example.org
Shahram Ghasemi, Department of Stock assessment,, Iranian Fisheries Research Organization, PO. Box 14155-6116, Tehran, Iran, Iran14155-6116. E-mail: email@example.com
Corresponding Author indicated by an *.
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