Standard fry farming

This is also called a "Flow from end to end method. Trout and other activity fish are often rise from eggs to fry or fingerlings and then trucked to streams and at large. Normally, the fry are raised in long, shallow tangible tanks, fed with clean stream water. The fry receive commercial fish food in pellets. While not as efficient as the New Alchemists' method, it is also far simpler, and has been old for many years to stock streams with game fish. European eel (Anguilla Anguilla) agriculturalists acquire a limited supply of glass eels, juvenile stages of the European eel which bathing north from the Sargasso Sea reproduction grounds, for their farms. The European eel is threatened with extermination because of the extreme catch of glass eels by Spanish fishermen and over fishing of adult eels in, e.g., the Dutch Ijsselmeer, Netherlands. As per 2005, no one has managed to breed the European eel in imprisonment. The issue of feeds in fish agricultural has been a controversial one. Many cultured fishes (papilla, carp, and catfish, many others) necessitate no meat or fish harvest in their diets. Top-level carnivores (most salmon species) depend on fish feed of which a portion is usually derived from wild caught (anchovies, menhaden, etc.). Vegetable-derived proteins have successfully replaced fish meal in feeds for carnivorous fishes, but vegetable-derived oils have not successfully been incorporated into the diets of carnivores. Secondly, farmed fish are kept in concentrations never seen in the wild (e.g. 50,000 fish in a 2-acre (8,100 m²) area. However, fish tend also to be animals that collective into large schools at high density. Most winning aquaculture species are schooling species, which do not have social problems at high density. Agriculturists tend to feel that operating a rearing system above its design capacity or above the social density limit of the fish will result in decreased growth rate and increased FCR (food conversion ratio - kg dry feed/kg of fish produced), which will effect in increased cost and risk of health evils along with a decrease in profits. Stressing the animals is not enviable, but the concept of and measurement of stress must be viewed from the perspective of the animal using the methodical method