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Inbreeding in fish is the mating of closely related individuals, leading to an increase in homozygosity. Repeated inbreeding generally leads to morphological abnormalities and a reduction in fitness in the offspring. In the wild, fish have a number of ways to avoid inbreeding, both before and after copulation.
Hormonal treatments can advance spawning by two to three weeks. [5] Manipulating photoperiod can alter spawning time by over four months and is cheap and straightforward to achieve. [5] Broodstock managers can use or select for traits such as fast growth rates or disease resistance over generations to produce more desirable fish. [15]
This fish species shows some importance to commercial fishing. [1] The spotted oceanic triggerfish, like other triggerfish, is sold at local markets in coastal Asian countries as a fish to be eaten. These triggerfish are not typically fished for specifically but rather are caught as by-catch in tuna purse seine fishing and on longlines (Sethi ...
Horses can breed with Przewalski's horse to produce fertile hybrids. Mule, a cross of female horse and a male donkey. Hinny, a cross between a female donkey and a male horse. Mules and hinnies are examples of reciprocal hybrids. Kunga, a cross between a donkey and a Syrian wild ass. Zebroids. Zeedonk or zonkey, a zebra/donkey cross. Zorse, a ...
Aquaculture can also be defined as the breeding, growing, and harvesting of fish and other aquatic plants, also known as farming in water. It is an environmental source of food and commercial products that help to improve healthier habitats and are used to reconstruct the population of endangered aquatic species.
Chum salmon is a typical cold water fish that prefer water around 10 °C (50 °F). When water temperature is raised due to thermal pollution, chum salmon tends to dive into deep water for thermoregulation. This reduces the time chum salmon spent in surface water column and reduce the chance for chum salmon to approach natal river since the ...
Fear of fish or ichthyophobia ranges from cultural phenomena such as fear of eating fish, fear of touching raw fish, or fear of dead fish, up to irrational fear (specific phobia). Selachophobia, or galeophobia , is the specific fear of sharks .
First experiments with artificial breeding cultures of M. rosenbergii were done in the early 1960s in Malaysia, where it was discovered that the larvae needed brackish water for survival. Industrial-scale rearing processes were perfected in the early 1970s in Hawaii , and spread first to Taiwan and Thailand , and then to other countries.