Population Dynamic of the Mudskipper <Emphasis Type="Italic">Periophthalmus waltoni</Emphasis> Koumans, 1941 from the Bay of Hormozgan Province,Persian Gulf

We studied the population structure and reproductive biology of the mudskipper Periophthalmus waltoni Koumans, 1941, living on the mudflats of bay of Hormozgan province, Persian Gulf. The specimens were haphazardly and monthly collected from August 2008 to July 2009. A total of 2060 fishes was sampled, sexed 690 of which 221 (32%) were males, and 469 (68%) females. The total length (TL) and weight relationship demonstrated growth in both sexes was isometric with the function W = 0.0078TL^3.06. The asymptotic length (L∞) and growth coefficient (K) were estimated as 16.5 cm and 0.75 yr^–1, respectively. Age of the fish at zero length (to) was calculated–0.35 and the longevity was attained 3.65 year. The estimated Von Bertalanffy function was TL_(t) = 16.5[1–exp(–0.75(t + 0.35))]. Natural mortality (M) was estimated 1.74 yr^–1. Four cohorts were distinguished annuallywith mean of TL = 7.35, 10.17, 12.74 and 13.92 cm. The maximum recruitment rate was in January at 17.5%. The overall sex ratio (F: M) (1: 0.49) was significantly different than 1: 1. The peak of the gonadosomatic index (GSI) occurred in February. The size at onset of sexual maturity (LM₅₀)wasestimated at TL = 12 cm. The mean of absolute and relative fecundity were estimated as 3558 ± 2203 and 257 ± 101 eggs, respectively.     

Length‐weight relationships of three fish species from Jask mangrove protected area in northern coastline of Gulf of Oman (Hormozgan,Iran): Liza klunzingeri (Day, 1888), Cociella crocodilus (Cuvier, 1829) and Platycephalus indicus (Linnaeus, 1758)

This study presents length‐weight relationships (LWRs) of Liza klunzingeri (Day, 1888), Cociella crocodilus (Cuvier, 1829), Platycephalus indicus (Linnaeus, 1758) belonging to two Families (Mugilidae and Platycephalidae) from northern coastline of Gulf of Oman (Hormozgan province). Samples were collected by artisanal trawl and beach seine (both with 11 mm effective mesh size) monthly during 2010 to 2015. The presented models were highly significant (p < 0.01) with a reliable coefficient of determination (R² > 0.90) that provides a reliable basic information for ichthyologists and fisheries scientists.     

Taxonomic Status and Molecular Systematics of an Endemic Fish,Herklotsichthys lossei (Clupeidae) from the Persian Gulf: Insights into Non-monophyly of the Genus

Journal of Ichthyology - The endemic Persian Gulf herring, Herklotsichthys lossei, has similar characteristics with other congeners, especially H. punctatus, which makes it difficult to recognize....