نتایج جستجو برای: fingerling
تعداد نتایج: 284 فیلتر نتایج به سال:
Animal protein, generally fish meal, has traditionally been used in the diet of channel catfish. However, our previous research indicates that animal protein is not needed for growing stockersize catfish to food fish when the fish are stocked at densities typical of those used in commercial catfish culture. Whether this holds when fish are stocked at high densities is not known; thus, we conduc...
Freshwater fish Fauna and Restock Fish Activities of Reservoir in the Dardanelles (Canakkale-Turkey)
Turkey has, with geographic location including Istanbul and Çanakkale straits the system, 178,000 km in length streams, 906,000 ha of natural lakes, and 411,800 ha of dam lakes, and 28,000 ha of ponds due to richness inland waters which include freshwater fish. The fingerling fish (fry) were restocked approximately 250,000,000 in natural lakes, dam lakes and ponds for fisheries between years of...
Variation and shift in the seasonal pattern of the hydro-climatic factors is probably because of climate related changes. Rainfall, river inflow, snowmelt, and consequent fluctuation in water level are the hydro-climatic factors that influence the inland fisheries production worldwide. Increase in rainfall and water level favours the reproduction, recruitment and immigration of fish in the inla...
A study was conducted to investigate the existing system of fry trade and different problems and prospects associated with this enterprise in Jessore district. A total of 82 hatchery operators and nursery owners were interviewed using a structured questionnaire. In the study period 4211.5 kg hatchling were produced in 85 hatcheries in this area of which 80% were reared in the same area. Average...
In Saudi Arabia, there is a scarcity of water used for agriculture and human consumption. Therefore, the aquaponic technique needs to be considered. Aquaponics modern, environmentally friendly agricultural technology that combines hydroponics aquaculture into one system. However, key successful system optimizing stocking density target species. This study estimates effect three densities—3 kg/m...
In the present study histological effects of copper sulphate on, 180 common carp, Cyprinus carpio, fingerlings were studied. In this regard, fish of treatment groups were exposed to 2, 4, 6, 8 and 10 ppm of copper sulphate during 4 days. Behaviours and clinical signs of fish were recorded during the experiment, and samples were done from kidney, liver and gill of moribund and fresh dead fish, a...
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