Enzyme heterozygosity and growth of rainbow trout reared at two rations

The relationship between heterozygosity at nine enzyme loci and both size and growth in rainbow trout (Salmo gairdneri) reared at either low (LRT) or high (HRT) ration for 84 days is reported. The experimental fish were progeny produced from a pooled mating of 25 female and 25 male rainbow trout captured in spawning condition at the Ganaraska River, Ontario. There is a significant negative regression between the number of heterozygous loci per fish and size (fork length and weight) among fish at the beginning of the experiment. Heterozygotes at two loci, Sod and Mdh3,4, were significantly smaller than homozygotes. A significant negative regression between multilocus heterozygosity and size was detectable among the fish reared at HRT for 84 days but not at LRT. Ration appeared to affect the strength of the association between heterozygosity and growth because at HRT homozygotes at the majority of loci grew faster than heterozygotes, but the reverse was true at LRT.

[1]  E. Zouros,et al.  HETEROZYGOSITY AND GROWTH IN MARINE BIVALVES: FURTHER DATA AND POSSIBLE EXPLANATIONS , 1988, Evolution; international journal of organic evolution.

[2]  F. Allendorf,et al.  Heterozygosity and components of fitness in a strain of rainbow trout , 1988 .

[3]  F. Allendorf,et al.  Heterozygosity and Oxygen-Consumption Rate as Predictors of Growth and Developmental Rate in Rainbow Trout , 1987, Physiological Zoology.

[4]  E. Zouros,et al.  The use of allelic isozyme variation for the study of heterosis. , 1987, Isozymes.

[5]  E. Zouros.  On the relation between heterozygosity and heterosis: an evaluation of the evidence from marine mollusks. , 1987, Isozymes.

[6]  M. Koljonen.  The enzyme gene variation of ten Finnish rainbow trout strains and the relation between growth rate and mean heterozygosity , 1986 .

[7]  T. Kocher,et al.  The Relation of Enzyme Heterozygosity to Standard and Active Oxygen Consumption and Body Size of Tiger Salamanders, Ambystoma tigrinum , 1986, Physiological Zoology.

[8]  E. Zouros,et al.  Genetics of growth in blue mussels: family and enzyme-heterozygosity effects , 1986 .

[9]  R. K. Koehn,et al.  Gamete production, somatic growth and multiple-locus enzyme heterozygosity inMytilus edulis , 1986 .

[10]  F. Allendorf,et al.  Does enzyme heterozygosity influence developmental rate in rainbow trout? , 1986, Heredity.

[11]  P. Gaffney,et al.  Physiological and Genetic Aspects of Growth in the Mussel Mytilus edulis. I. Oxygen Consumption, Growth, and Weight Loss , 1986, Physiological Zoology.

[12]  F. Allendorf,et al.  HETEROZYGOSITY AND DEVELOPMENTAL RATE IN A STRAIN OF RAINBOW TROUT (SALMO GAIRDNERI) , 1986, Evolution; international journal of organic evolution.

[13]  R. K. Koehn,et al.  Multiple-locus heterozygosity, mortality, and growth in a cohort of Mytilus edulis , 1985 .

[14]  R. K. Koehn,et al.  Multiple-locus heterozygosity and the physiological energetics of growth in the coot clam, Mulinia lateralis, from a natural population. , 1984, Genetics.

[15]  M. C. Grant,et al.  Associations Among Protein Heterozygosity, Growth Rate, and Developmental Homeostasis , 1984 .

[16]  F. Ledig,et al.  THE RELATION OF GROWTH TO HETEROZYGOSITY IN PITCH PINE , 1983, Evolution; international journal of organic evolution.

[17]  Shiva M. Singh,et al.  An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure , 1983 .

[18]  M. Turelli,et al.  Should individual fitness increase with heterozygosity? , 1983, Genetics.

[19]  F. Allendorf,et al.  Isozyme loci in brown trout (Salmo trutta L.): detection and interpretation from population data. , 2009, Hereditas.

[20]  T. B. Bagenal.  The Relationship Between Food Supply and Fecundity in Brown Trout Salmo trutta L. , 1969 .

[21]  H. Clemens,et al.  Testicular characteristics of goldfish Carassius auratus, in nature and under diet limitations , 1967, Journal of morphology.

[22]  D. P. Scott.  Effect of Food Quantity on Fecundity of Rainbow Trout, Salmo gairdneri , 1962 .