Growth and Mortality Parameters of Common carp, (Cyprinus carpio Linnaeus, 1758) in Shadegan wetland

Growth and Mortality Parameters of Cyprinus carpio were studies in Shadegan wetland. Monthly samples were collected from landing at five stations: Doragh, Rogabe, Khorosy, Salmaneh, Atish. During one year's study from April 2013 to March 2014, 1401 specimens were measured. Mean±s.d length values for this female, male and total fish include were 207±20, 200±33 mm respectively and mean±s.d weight Values were 162±98, 116 ±96gr respectively. Length-weight relationship with Excel program of for female, male this species were resulted W=0.00003 L2.89 (N=397, R2=0.91), W=0.0004 L2.60 (N=301, R2=0.95) respectively. The growth parameters of von Bertalanffy equation for female, male and total fish this species as below were estimated as, The growth parameters of von Bertalanffy equation were estimated as, L∞: 514, 483 and 514 and K: 0.31, 0.49 and 0.36 and t0: -0.5,- 0.15, and -0.2 respectively. Mortality coefficients such as total mortality, Z: 1.41, 1.51 and 1.44 natural mortality, M: 0.61, 0.83 and 0.66 and fishing mortality, F: 0.53, 0.67 and 0.83 respectively. Based on results and with comparing to American Fisheries Society (AFS) indices, this species was classified as moderate vulnerable group fishes.