Assigning the Potential Places of Life Astacus Leptodactylus in Anzali Wetland using by GIS

Abstract

There was a sampling due to the economic importance and bringing ceder of fresh water Astacus Leptodactylus for researching Anzali wetland for assigning the potential places of life for natural growth of this type from 13 station in 13 inflow rivers to it (Bhambarrod,Morghad and Khalkaei, Espand, Kolesar, Chomesghal, Nargestan, Siah darvishan, Hendehkhaleh, Pirbazar, Bijrodack, Ghanadi, Ramezan Bekande, shayjan), the sample of superficial water produced by Nansen bottle and were provided by standard method of APHA and their physical and chemical parameters measured and we used of the book named standared method (standard method for water and waste Analysis) for measuring of BOD,Calcium, total phosphore, total hardness and NH4. These results shows that the average of temperature is between 18.39and 19.25 and the min and max average of soluted oxygen change between 6.28 and 6.9 ppm in 1 to 13 station which these quantities related on the best need of the type. The number of calcium is the most important factor for growing this type, between 58.29 and 67.93 has been changed in 13 station and this is a desired quantities and it doesn’t seem that calcium is a limiting factor in growing king prawns in Anzali wetland. King prawn has physiological good capacity for living in pH between 6.5 and 8 that these quantities are proportionate to obtained average between 7.28 and 7.87 from the station. The effective factors on decreasing the saving of Anzali wetland King prawn can be increase of pollution, different disease, recent droughts, entrance of macrobrachyium, Azola, releasing fish, increasing the hunters, decreasing the average of depth, settling and the time of remaining of wetland salting specially during 2 years ago are the most importance factor for decreasing of this species.

DOI: 10.5901/mjss.2016.v7n2s2p73