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To prevent the genetically modified fish inadvertently breeding with wild salmon, all the fish raised for food are females, triploid, and 99% are reproductively sterile. [ 33 ] [ 30 ] The fish are raised in a facility in Panama with physical barriers and geographical containment such as river and ocean temperatures too high to support salmon ...
AquaBounty says that to prevent the genetically modified fish from inadvertently breeding with wild salmon, all of the fish will be female and reproductively sterile, [117] although a small percentage of the females may remain fertile. [114] Some opponents of the GM salmon have dubbed it the "Frankenfish". [114] [120]
Marker assisted selection or marker aided selection (MAS) is an indirect selection process where a trait of interest is selected based on a marker (morphological, biochemical or DNA/RNA variation) linked to a trait of interest (e.g. productivity, disease resistance, abiotic stress tolerance, and quality), rather than on the trait itself.
The direct selection for biological traits through fishery practices is the result of fishery management regulations, and gear restrictions and selectivities. [1] The most obvious artificial selection for traits through management legislation can be observed in the imposed regulations on size (minimum landing size), sex, seasonality, and locations.
Most male fish have two testes of similar size. In the case of sharks, the testes on the right side is usually larger [citation needed].The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
Nuptial tubercles or breeding tubercles (also called pearl organs or nuptial efflorescence) are noticeable skin roughness or horny nodules that form on male fish during breeding. They are made of keratin, the same material as hair, hooves, and fingernails.
Aquarticles.com - "An international collection of articles about fish and aquariums, available for free use in aquarium club newsletters and non- commercial web sites." Ornamental Fish Association - Trade organisation for the ornamental fish industry; Wet Web Media - Large web site covering different aspects of fishkeeping.
Broodstock, or broodfish, are a group of mature individuals used in aquaculture for breeding purposes. Broodstock can be a population of animals maintained in captivity as a source of replacement for, or enhancement of, seed and fry numbers. [1]