SINGLE‐ AND MULTIPLE‐LOCUS GENOTYPES AND LIFE‐HISTORY RESPONSES OF GAMBUSIA HOLBROOKI REARED AT TWO TEMPERATURES

Eastern mosquitofish (Gambusia holbrooki) were reared from birth to 10 wk of age at 25°C and 32°C. Relationships of growth, time to maturity, and developmental stability to isozyme genotype were used to examine the hypothesis that more heterozygous individuals should exhibit superior performances, especially under thermally stressful (32°C) conditions. More heterozygous fish grew faster than homozygous individuals, especially at 32°C. Significant differences in time to maturity were detected among allozyme genotypes but not with heterozygosity. Multiple‐locus heterozygosity was negatively related to fluctuating asymmetry. Thus, life‐history traits were affected by both multiple‐locus heterozygosity and single‐locus genotype.

[1]  R. Ben-Shlomo,et al.  Mercury selection of allozymes in marine organisms: Prediction and verification in nature. , 1984, Proceedings of the National Academy of Sciences of the United States of America.

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

[3]  R. Selander,et al.  Biochemical polymorphism and systematics in the genus Peromyscus , 1974 .

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

[5]  M. Soulé,et al.  A CASE OF STRESS RELATED HETEROZYGOTE SUPERIORITY IN NATURE , 1983, Evolution; international journal of organic evolution.

[6]  M. Gibson,et al.  The Effect of Salinity and Temperature on the Pre-Adult Growth of Guppies , 1955 .

[7]  R. Vrijenhoek,et al.  HETEROZYGOSITY AND DEVELOPMENTAL STABILITY UNDER SEXUAL AND ASEXUAL BREEDING SYSTEMS , 1982, Evolution; international journal of organic evolution.

[8]  M. Schreibman,et al.  A sex-linked gene controlling gonadotrop differentiation and its significance in determining the age of sexual maturation and size of the platyfish, Xiphophorus maculatus. , 1973, General and comparative endocrinology.

[9]  E. Nevo,et al.  Genetic diversity and resistance to marine pollution , 1986 .

[10]  M. C. Newman,et al.  Allozyme genotype and time to death of mosquitofish, Gambusia affinis (baird and girard), during acute exposure to inorganic mercury , 1989 .

[11]  J. Feder,et al.  Biochemical Genetics of Mosquitofish. II. Demographic Differentiation of Populations in a Thermally Altered Reservoir , 1984 .

[12]  Joseph Travis,et al.  Fertility Advertisement by Female Sailfin Mollies, Poecilia latipinna (Pisces: Poeciliidae) , 1986 .

[13]  P. Rodhouse,et al.  Effect of heterozygosity on metabolism during starvation in the American oysterCrassostrea virginica , 1984 .

[14]  F. Allendorf,et al.  Developmental stability and enzyme heterozygosity in rainbow trout , 1983, Nature.

[15]  F. Allendorf,et al.  Superior Developmental Stability of Heterozygotes at Enzyme Loci in Salmonid Fishes , 1984, The American Naturalist.

[16]  W. B. Watt.  Adaptation at specific loci. I. Natural selection on phosphoglucose isomerase of Colias butterflies: Biochemical and population aspects. , 1977, Genetics.

[17]  B. A. Pierce,et al.  The Relationship between Allozyme Variation and Life-History Traits of the Spotted Chorus Frog, Pseudacris clarkii , 1991 .

[18]  F. F. Snelson.  Seasonal maturation and growth of males in a natural population of Poecilia latipinna , 1984 .

[19]  C. Strobeck,et al.  Fluctuating Asymmetry: Measurement, Analysis, Patterns , 1986 .

[20]  W. B. Watt.  Biochemistry, Physiological Ecology, and Population Genetics-the Mechanistic Tools of Evolutionary Biology , 1991 .

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

[22]  G. Meffe.  Plasticity of Life-History Characters in Eastern Mosquitofish (Gambusia holbrooki: Poeciliidae) in Response to Thermal Stress , 1992 .

[23]  R. K. Koehn,et al.  The differential contribution by individual enzymes of glycolysis and protein catabolism to the relationship between heterozygosity and growth rate in the coot clam, Mulinia lateralis. , 1988, Genetics.

[24]  R. K. Koehn,et al.  Dominance in physiological phenotypes and fitness at an enzyme locus. , 1985, Science.

[25]  R. Borowsky.  Agonistic behavior and social inhibition of maturation in fishes of the genus Xiphophorus (Poeciliidae) , 1987 .

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

[27]  Richard K. Koehn,et al.  Towards a physiological and genetical understanding of the energetics of the stress response , 1989 .

[28]  Louis A. Krumholz,et al.  Reproduction in the Western Mosquitofish, Gambusia affinis affinis (Baird & Girard), and Its Use in Mosquito Control , 1948 .

[29]  Lack of relationship between morphological variance and enzyme heterozygosity in the plaice, pleuronectes platessa , 1982, Heredity.

[30]  M. C. Newman,et al.  Allozyme genotype and time to death of mosquitofish, Gambusia affinis (Baird and Girard) during acute toxicant exposure: a comparison of arsenate and inorganic mercury , 1989 .

[31]  Michael W. Smith,et al.  Biochemical Genetics of Mosquitofish. I. Environmental Correlates, and Temporal and Spatial Heterogeneity of Allele Frequencies within a River Drainage , 1983 .

[32]  W. Wurtsbaugh,et al.  Growth and Activity of Juvenile Mosquitofish: Temperature and Ration Effects , 1983 .

[33]  F. Ayala,et al.  Enzyme Variability in the Drosophila willistoni GroupVIII. Genetic differentiation and reproductive isolation between two subspecies , 1973 .

[34]  W. Burns,et al.  Comparative Animal Physiology , 1953, Nature.

[35]  T. Dobzhansky,et al.  GENETIC HOMEOSTASIS , 1955 .

[36]  H. Yan,et al.  Size at maturity in male Gambusia heterochir , 1987 .

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

[38]  A. Beaumont,et al.  Environmental stress, heterozygosity, and growth rate in Mytilus edulis L. , 1988 .

[39]  J. Powell,et al.  Enzyme variability in the Drosophila willistoni group. IV. Genic variation in natural populations of Drosophila willistoni. , 1972, Genetics.

[40]  F. Allendorf,et al.  DIFFERENCES IN INBREEDING COEFFICIENTS DO NOT EXPLAIN THE ASSOCIATION BETWEEN HETEROZYGOSITY AT ALLOZYME LOCI AND DEVELOPMENTAL STABILITY IN RAINBOW TROUT , 1987, Evolution; international journal of organic evolution.

[41]  C. Grobstein.  The structure and development of the gonopod in Platypoecilus maculatus , 1940 .