Culturing Rutilus frisii kutum, a Fish Species of the Caspian Sea, to Marketable Size
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Author
Danesh Khoshasl, A.Date
1997
Métadonnées
Afficher la notice complèteAbstract
Rutilus frisii kutum, belonging to family Cyprinidae, was reared using mono-culture and poly-culture (combined with Chinese carps) methods. The culturing process were carried out in earthen ponds from 22 May to 23 October in 1992 and 1993. Physical and chemical factors, transparency of the water, sanitary control and growth of the fishes were surveyed monthly. Nitrate and phosphate fertilizer and animal manure (cow and chicken) were applied to facilitate the growth of phytoplanktons and benthoses. Fertilizer usage were regulated according to the results of hydrochemical analyses and the transparency of the water. The fishes were fed on artificial food, concentrated pellet specially made for Rutilus frisii kutum nutrition (KF). Their diet were calculated using the body weight percentage (biomass) as well as their appetite. The essential characteristics of the water including water temperature (15°c - 27.64°c), pH (6.9 - 8.74), dissolved oxygen (4.79 - 7.25 ppm) and trasparancy of the water (often varied between 20 - 30 cm) were measured in the first year. Mean weight of the young fishes in the ponds were 30 gr; after six months the fishes caught in mono-culture ponds had reached 177 gr. By poly-culture method fishes reached 185 gr, and their maximum weight were 300 gr. In the second year the ponds were stocked with young fishes weighing 7 gr. When the fishes in mono-culture and poly-culture ponds were caught, they had reached 168 gr and 192 gr, respectively. Their maximum weight were 250 gr.Journal
Iranian Scientific Fisheries JournalVolume
6Issue/Article Nr
3Page Range
pp.49-58Resource/Dataset Location
http://isfj.areo.ir/Collections