he Caspian Sea is the biggest enclosed sea of the world. The natural resources of the Caspian Sea are of high economic value and the biodiversity of the Caspian Sea is 2.5 times poorer than the biodiversity of the black sea and 5 times poorer than in the Barents Sea. Fisheries are very important industries throughout the Caspian countries. An experiment was conducted for determination of by-catching fishes in commercial fishing clupeonella sp (kilka fish) catching in the southern coast areas Caspian sea. 500-600 thousand tons of fishes are extracted annually from the sea the majority of which include species such as migrating marine species and endemic species. For fish identification biological indices were determined by using standard technique and instrument in Guilan fisheries research center Bandar-e- anzali. from obtained results, in this examination it was showed that most species include: In particular the blackback shad (alosa kessleri kessleri) Caspian shad (alosa caspia caspia) common carp (cyprinus carpio) Caspian roach (rutilus frissi kutum) mullet (mugil auratus) sand smelt (atherina boyeri) catfish (silurus glanis) ell fish (anguilla anguilla) pipe fish (syngnathus abaster) zander (stizostediun lucioperca) bream (abramis brama) gobies (neogobius melanostomus) and (neogobius kessleri) barbus sp (barbus brachicephalus) .
کلید واژگان :by-catching . Fishing effort .caspian sea .kilka fish. Biometry .identification key
ارزش ریالی : 100000 ریال
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