Growth and vitality in yellow forms of rainbow trout

Autor:	K. Goryczko, Klaus Kohlmann, S. Dobosz, H. Kuzminski
Rok vydání:	2000
Předmět:	endocrine system animal structures genetic structures urogenital system Ecology animal diseases Zoology Aquatic Science Biology biology.organism_classification Vitality Trout Genetic marker Fish Rainbow trout Allele
Zdroj:	Journal of Applied Ichthyology. 16:117-120
ISSN:	1439-0426 0175-8659
DOI:	10.1046/j.1439-0426.2000.00147.x
Popis:	Summary The colour genes controlling the palomino and albino phenotype in the spring spawning rainbow trout [Oncorhynchus mykiss (Walbaum 1792)] strain reared at the Department of Salmonid Research Rutki, Poland were found to have strong detrimental pleiotropic effects on growth and vitality. After 5 and 9 months of rearing, the differences in mean body weights in albino, palomino and wild-coloured trout were statistically highly significant, with albino showing the poorest, palomino as the intermediate and wild-coloured trout having the highest growth. An identical ranking of colour phenotypes was observed for survival. The influence of colour phenotypes on both traits showed a diminishing tendency with increasing age of fish. It is concluded that alleles controlling palomino and albino colouration cannot be recommended as genetic markers. If reference groups are needed, instead of albino trout, palomino trout should be used since their pleiotropic effects are less pronounced.
Databáze:	OpenAIRE
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