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Fresh water aquaculture industry [2006]

Description

This factsheet provides an overview of the marketing and production characteristics of freshwater aquaculture in Alberta.

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Fish tapeworm in man

Description

Many parasites infect fish, but only a few such as the broad tapeworm, Diphyllobothrium spp., occasionally infect man. The larval stage of these parasites develops in fish while the adults develop... More ≫

Description

Many parasites infect fish, but only a few such as the broad tapeworm, Diphyllobothrium spp., occasionally infect man. The larval stage of these parasites develops in fish while the adults develop in various fish-eating mammals, marine mammals or fish-eating birds. The best known species in this group, D. latum, is the longest tapeworm in man, reaching a length of 10 meters. This parasite is found worldwide and is common in countries where raw or undercooked fish is eaten.

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Flatworm cysts in fish : the North American liver fluke

Description

When well cooked, most fish are safe to eat. However, there are risks associated with eating raw or lightly cooked fish, and the consumer should be aware of them. Human infections by parasitic... More ≫

Description

When well cooked, most fish are safe to eat. However, there are risks associated with eating raw or lightly cooked fish, and the consumer should be aware of them. Human infections by parasitic worms in edible fishes in Canada are rare. However, the following article describes a parasitic flatworm, the North American liver fluke Metorchis conjunctus, that has been a serious problem in sled dogs in Northern regions and is now emerging as a potential health risk to humans.

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Feeding the fish in your dugout or pond

Description

Proper nutrition is essential to the health of all animals, and fish are no exception. Recreationally cultured fish stocked at a reasonable density in a dugout or pond will obtain most, if not... More ≫

Description

Proper nutrition is essential to the health of all animals, and fish are no exception. Recreationally cultured fish stocked at a reasonable density in a dugout or pond will obtain most, if not all, their nutrition from their environment. Depending on the ecology of each pond, this natural supply of food may include varied amounts of aquatic and terrestrial invertebrates, such as insects, worms, leeches and freshwater shrimp, as well as amphibians, minnows, plant material and microscopic plankton. However, fish that are found to be slow growing, small at harvest or were knowingly more densely stocked may need to be provided with prepared feeds.

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Predator damage control in cultured fish

Description

Birds, fish and mammals are known predators of cultured fish. Bird predation is the major source of fish loss at aquaculture facilities. Predatory fish can also be a major concern to fish stocks,... More ≫

Description

Birds, fish and mammals are known predators of cultured fish. Bird predation is the major source of fish loss at aquaculture facilities. Predatory fish can also be a major concern to fish stocks, followed by mammal predation to a much lesser extent. The diversity of Alberta’s aquaculture practices as well as the variety of predators means producers need to understand damage prevention and control techniques. These control measures may be used singly or in combination to alleviate predation problems.

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