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Biological weed control in Alberta using triploid grass carp

Description

Heavy, dense stands of submerged aquatic vegetation are a major problem in many Alberta pond and dugout environments. Controlling this vegetation using the weed-eating grass carp may be one answer... More ≫

Description

Heavy, dense stands of submerged aquatic vegetation are a major problem in many Alberta pond and dugout environments. Controlling this vegetation using the weed-eating grass carp may be one answer to this problem.

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Fresh water aquaculture industry [2014]

Description

The purpose of this fact sheet is to provide an overview of the marketing and production characteristics of freshwater aquaculture in Alberta. This overview is not intended to be a substitute for... More ≫

Description

The purpose of this fact sheet is to provide an overview of the marketing and production characteristics of freshwater aquaculture in Alberta. This overview is not intended to be a substitute for individuals making their own thorough assessment of all the key issues that will influence the success of an individual enterprise.

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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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Constructing dugouts for fish

Description

Dugouts provide water for a variety of purposes. They can be used as a source for domestic (household) water supplies, livestock watering, as well as raising fish for enjoyment or profit. If the... More ≫

Description

Dugouts provide water for a variety of purposes. They can be used as a source for domestic (household) water supplies, livestock watering, as well as raising fish for enjoyment or profit. If the dugout is constructed properly and in a suitable location, very little maintenance is required. If algae, vegetation or suspended solids become problems, then control can be either chemical (copper sulphate, diquat, aluminum sulphate, etc.), mechanical (uprooting weeds with chains) or biological (grass carp). Care must be taken in dugouts used for fish culture, as some of the chemical applications are directly toxic to the fish or result in decomposing plants that ultimately deplete the oxygen needed by the fish.

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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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Screening your fish pond

Description

If your fish-rearing pond is constructed to allow the passage of water in and out of the impoundment, you need a permanent barrier restricting fish movement. Water passage could be from continuous... More ≫

Description

If your fish-rearing pond is constructed to allow the passage of water in and out of the impoundment, you need a permanent barrier restricting fish movement. Water passage could be from continuous flows, such as wells, aquifers and springs, or intermittent flows, such as annual runoff or flooding conditions.

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