in fish propagation and aquaculture industry, egg incubation period up to hatching is the most critical time. there is scarce information about events happening during this period for caspian kutum, which is a very economically important endemic fish in the caspian sea. morphological and histologial developmental changes of caspian kutum eggs and embryo up to hatching were investigated. develop...

Cobitis faridpaki Cobitis faridpaki (Mousavi-Sabet, Vasil'eva, Vatandoust and Vasil'ev, 2011) is found in streams of the Siahrud River in the southeastern Caspian Sea basin, and this is the first report on reproductive parameters of the newly described endemic loach. Reproductive conditions are key parameters of fish populations, and their assessment is very important for endemic fishes. To stu...

Five highly variable microsatellite loci were used to investigate genetic variations and population structure of common carp of Caspian Sea. A total of 54 fish were genotyped giving 35 alleles over all loci. The mean number of alleles, per locus in population ranges from 5.5 to 13.0 and the mean observed heterozygosity at the five loci was 0.84. An analysis of genetic variations indicated the H...

anzali lagoon can be one of the most important wetlands called the world. this lagoon to support the most fish in the caspian sea is reproduced for the spawn, multiply, and sometimes live, to make the pond.much of rasht and anzali city sewage and agricultural waste area of the lagoon through rivers into the pyrbazar and increased levels of organic pollutants such as nitrite, nitrate, phosphate,...

The Ponto-Caspian amphipod Obesogammarus obesus (Sars, 1894) was first recorded in the Rhine River near Koblenz, Germany in October 2004. Additional records of small numbers of O. obesus from the same location in 2005 and 2006 indicate that this alien species may have become established in the central section of the Rhine River. Ship transport via the Main-Danube Canal, connecting the Danube ba...

the main objective of the present study was qualitative assessment of golden gray mullet stocks by using indicators of overfishing in iranian waters of the caspian sea during a long period (1991-2011). three fisheries indicators in catch were: 1. percentage of mature fish, with 100% as target; 2. percent of specimens with optimum length, with 100% as target; and 3. percentage of mega-spawners, ...

this study was carried out to identify technical-agronomic factors impressible from fish farming in rice fields. this investigation carried out by descriptive survey during july-august 2009. studied cities including talesh, rezvanshahr and masal set in tavalesh region near to caspian sea, north of iran. the questionnaire validity and reliability were determined to enhance the dependability of t...

abstract: after the collapse of the soviet :union:, and the geopolitical changes in the region, which caused emergence of four new states, the outlook to the caspian sea and it's issues have changed. dealing with numerouse oil contracts with multinational companies and the entrance of transnational states and organizations, aggrevated the political and economic competitions and increased t...

study of the osteological development in fishes is important from fisheries, biology and aquaculture points of views. it can be used as an early bio-indicator of non-optimal rearing conditions. the caspian roach, rutilus caspicus is a native cyprinid fish of the caspian sea that its artificial propagation has fulfilled in hatcheries to recruit its natural stocks. hence, this study was conducted...