بررسي رابطه ي طول و وزن ماهي تيلاپيا زيلي در تالاب شادگان

length-weight relationship of Tilapia zilli (Gervais, 1848) in Shadegan wetland

هدف از اين مطالعه بررسي رابطه طول كل و وزن تيلاپيا زيلي در تالاب شادگان است. نمونه برداري به صورت ماهيانه و به مدت يك سال از مهرماه 1394 تا شهريورماه 1395 صورت گرفت. . ماهيان بلافاصله پس از صيد در فرمالين 10 درصد تثبيت شدند و به آزمايشگاه انتقال پيدا كردند. تعداد 401 قطعه ماهي مورد زيست سنجي قرار گرفتند. بيش ترين و كم ترين ميانگين طول كل به ترتيب در بهمن (23381/0±11/16) و مرداد (34935/0±31/11) به دست آمد و بيش ترين و كم ترين ميانگين وزن به ترتيب در بهمن (13429/4±41/92) و مرداد )80659/2±54/33) ثبت شد. رابطه ي طول كل- وزن براي ماهيان w=

The aim of this study was to investigate the relationship between total length and weight of Tilapia zilli in the Shadegan wetland. Sampled took place monthly for one year from September 2015 date to August 2016.the fish immediately after the catch was fixed in 10% formalin and transported to the laboratory. 401 pieces were biometry.The highest and lowest mean total length was respectively in January (16.11 ± 0.23381) and July (11.31 ± 0.34935) and the highest and lowest mean weight was respectively in January (92.41 ± 4.13429) and July (33.54 ± 2.80659). length-weight relationship to fish was calculated w=0.03 with a correlation coefficient 96/0 and showed significant difference between the calculated value b and number 3 (p 0/05). Thus, we can conclude that the growth of this fish is not identical in all aspects ,In other words have negative allometric growth.