|
Inbreeding In Fish
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 spawning. Exposure Exposure of zebrafish to a chemical environmental agent, analogous to that caused by Human impact on the environment, anthropogenic pollution, amplified the effects of inbreeding on key reproductive traits. Embryo viability was significantly reduced in inbred exposed fish and there was a tendency for inbred males to sire fewer offspring. Effects The effect of inbreeding on reproductive behavior was studied in the Poeciliidae, poeciliid fish ''Heterandria formosa''. One generation of full-sib mating was found to decrease reproductive performance and likely reproductive success of male progeny. Other traits that displayed inbreeding depression were offspring viabili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zebrafish (26436913602)
The zebrafish (''Danio rerio'') is a species of freshwater Actinopterygii, ray-finned fish belonging to the Family (biology), family Danionidae of the Order (biology), order Cypriniformes. Native to South Asia, it is a popular aquarium, aquarium fish, frequently sold under the trade name zebra danio (and thus often called a "tropical fish" although it is both tropical and subtropical). The zebrafish is an important and widely used vertebrate model organism in scientific research, particularly developmental biology, but also gene function, oncology, teratology, and drug development, in particular pre-clinical development. It is also notable for its regeneration (biology), regenerative abilities, and has been genetically modified organism, modified by researchers to produce many transgenic strains. Taxonomy The zebrafish is a derived trait, derived member of the genus ''Brachydanio'', of the family Cyprinidae. It has a cladistics, sister-group relationship with ''Danio aesculapi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
