Population Dynamics and Reproduction Biology of Mudskipper ( Boleophthalmus dussumieri, Valenciennes, 1837) From Hormozgan Province Creeks, Persian Gulf

Mudskipper ( Boleophthalmus dussumieri ) is one of the dominant fishes in tidal mud flats area. A totally of 1461 speciments were sampled, reproduction and population parameters of Mudskipper studied monthly from october 2008 to september 2009. Maean of total length calculated The asymptotic length (L∞) and growth coefficient (K) were estimated as 24.5(cm) and 0.47(yr-1), respectively. The minimum and maximum T.L was recorded 4.8 and 23.5 (cm) respectively. The value of to was calculated -0.37, and Tmax was estimated 6 year. The growth equation of Von Bertalanffy was obtained at L (t) = 24.5(1- exp (-0.47(t-(-0.37))) for this species. The rates of natural mortality (M) on Pauly's empirical equation, was estimated 1.15 (yr-1). Five cohorts were distinguished annualy on Bhattacharya's method with mean length of 6.63, 9.64, 14. 6, 18.57 and 20.72 cm. Maximum recruitment was in Seprember at 21.3 percent. Reproductive studies showed that peak of maturity season occurred in April. The female to male ratio was calculated as 1:0.54 and chi-square analysis showed that it is statistically significant (P<0.05). LM50 is attained at a total length of 13.5 cm. The mean of absolute and relative fecundity were estimated to be 3952(±1031) and 146(±36) respectively. The length-weight relationship was determined as W= 0.027 L 2.3963, that was isometric growth. Result showed that slender mudskipper population was in congenial condition, nevertheless not evaluated.