Length-weight and length-length relationships, Relative condition factor and Fulton’s condition factor of Five Cyprinid species in Anzali wetland, southwest of the Caspian Sea

در اين مطالعه رابطه طول- وزن، طول- طول، فاكتور وضعيت نسبي (Krel) و شاخص وضعيت فولتون (K) براي پنج گونه ماهي از خانواده كپور ماهيان مورد بررسي قرار گرفت. ماهيان از غرب تالاب انزلي (جنوب غربي درياي خزر) از آبان ماه 1389 تا ارديبهشت ماه 1390 توسط تور گوشگير و تله مخروطي جمع آوري شدند. تعداد 368 نمونه اندازه گيري و وزن گرديدند. ميزان b (شيب خط) رابطه طول- وزن ماهيان بين 5358/2 تا 3613/3 و ميزان b (شيب خط) رابطه طول- طول ماهيان بين 8717/0 تا 9412/0 بدست آمد. همچنين فاكتور وضعيت نسبي ماهيان بين 11/0±00/1 تا 21/0±30/1 و شاخص وضعيت فولتون بين 05/0±80/0 تا 18/0±60/1 محاسبه گرديد

This study was conducted to determine length-weight and length-length relationships, relative condition factor (Krel) and Fulton’s condition factor (K) for five species including Scardinius erythrophtalmus, Carassius auratus gibelio, Cyprinus carpio, Tinca tinca and Hemiculter leucisculus belonging to Cyprinidae family. Fish sampling was carried out by gill net and fyke net in the western region of Anzali wetland (SW of the Caspian Sea) between Nov. 2010 and May 2011. 368 specimens were measured and weighed. The values of the exponent b in the length-weight relationships (LWRs) ranged from 2.5358 to 3.3613 and those of the length-length relationship (LLRs) ranged from 0.8717 to 0.9412. Also, relative condition factor (Krel) ranged from 1.00±0.11 to 1.30±0.21 and Fulton’s condition factor (K) ranged from 0.80±0.05 to 1.60±0.18 for all species.