Review the composition and abundance of west white shrimp farms Macrobenthoses (Litopenaeus vannamei) in Gomishan, Golestan Province

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-02-02 Accepted : 2021-02-02 Published : 2013-05-22

Keywords: Golestan province, Litopenaeus vannamei, Abundance, Composition, Keywords: Macrobenthos,

Abstract :

Abstract[1] Macrobenthos composition and abundance of white shrimp farms in the western region in Gomishan, Golestan Province was conducted. Two saltwater pools 1 acre with mean depth of 1 and 1.5 m was used. During four months, (2010), the sampling of bottom sediments of shrimp ponds, from the entrance, center, and output sides stations and 3 samples from each location using samples of sediment and benthos (Ekman Grab) with 262 square centimeters of surface area were taken monthly and stained with Rose Bengal solution and fixed with 70% ethyl alcohol and samples of 500 micron sieve in laboratory and washed for maintenance of macrobenthoses. Microscope and binocular was use and all the creatures according to main groups were counted and identified. Also for determining of total organic matter (TOM%) monthly and for soil aggregation, a sample of each pool during the breeding period of five locations was took and analyzed with conventional methods. Results showed the existence of three main groups of arthropods (crustaceans and insects), ring worms (polychaetes worms) and mollusks (clams and a gastropod) which the polychaetes with 78% and 83%, respectively had the highest frequency in pool 6 and 16. Macrobenthos composition and abundance were monthly different and in each pool, too. TOM% did not show significant differences in both pools (P>0.05), while was significant monthly (P<0.05). Tissue pools contain a grain of sand, silt and clay, which it was different between two pools and in different parts. %TOM rate is relatively high in the bed sediments that it is probably due to the gradation of silt-clay. * Corresponding Authors; Email: [e-mail]