An Investigation on Macro benthos of south western Caspian Sea (Gilan) coasts

Caspian Sea is the biggest lake in the world among Iran. Torkamanestan, Ghazaghestan, Russia and republic of Azerbaijan. There have been many and different studies on Mazandaran Sea Bentouz that occurs in different deeps of the sea and times and places of Gilan coast including three sections: west, central coasts, east coasts. Bentouz are among creatures living near or in the deep of the ocean and seas, and depend on surface of sea. Some of the Bentouz live between sediment and some others live on the sediment close to the bottom of the seas. Present studies have been done during 10 months from Aban 2009 till Mordad 2010 in south west coast of Caspian sea (Gilan province) through choosing 4 stations called: Sefidrood, Anzali port, Lisar and Astara of 0/5 to 1 meter deep (close to the coast and a little far from the coast) and was repeated for 9 times monthly in each stations. During 4 seasons of sampling, tottaly 17936 micro Bentous from 4 Anzali stations numbering 769, Sefidrood numbering 16435, Lisar numbering 490 and Astara numbering 248 was collected in Gilan province and 19 types were recognized. The maximum supply belonged to the Sefidrood station and the minimum supply belonged to Astara station. Also the maximum supply of micro bentous in the coast of Gilan province belonged to gammaridae group in Sefid rood and then the maximum supply belonged to the type of stuari sefidrod in Anzali coast and the minimum micro Bentous in the Gilan province coast belonged to the types of Hypania invalida، Anisus stud، Tinodes waeneri، Polycentropus flavomaculatus ، Rhithropanopeus harrisii ، Lubidura riparia ، Ilybius fuluinosus.