Genetic Variability in the Deep Sea: Relation to Environmental Variability

Gooch, James L.; Schöpf, Thomas J. M.

doi:10.2307/2407051

Cited by 85 publications

(29 citation statements)

References 17 publications

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“…Data on this point have been accumulating gradually. Schopf andGooch (1971, 1972) and Gooch and Schopf ( 1972) have studied genetic variation at 4 to 15 loci in small samples of eight deep-sea populations (average loci per population, 9.25), and have concluded that deep-sea organisms are about as variable genetically as are organisms from more variable and more heterogeneous environments elsewhere. Doyle (1971Doyle ( , 1972 has examined four to six loci in three species of deep-sea ophiuroids and found considerable variability.…”

Section: Discussionmentioning

confidence: 99%

Deep-Sea Asteroids: High Genetic Variability in a Stable Environment

et al. 1975

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Section: Discussionmentioning

confidence: 99%

Deep-Sea Asteroids: High Genetic Variability in a Stable Environment

et al. 1975

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“…The range stretches from a rare minimum of naught in a reptile population to a maximum approaching fourty per cent in a Drosophilu population. There is nothing exceptional about Zources whose WEITKAMP and NEEL 1972WEITKAMP and NEEL 1972SELANDER and YANC 1969SELANDER et al 1971JOHNSON et al 1972JOHNSON and SELANDER 1971JOHNSON and SELANDER 1971JOHNSON and SELANDER 1971MCKINNEY et al 1972HALL and SELANDER 1973WEBSTER et al 1972WEBSTER et al 1972WEBSTER et al 1972WEBSTER et al 1972DESSAUER and NEVO 1969 BlRLEY and BEARDMORE 1972 Present report AVlsE and SELANDER 1972JOHNSON et al 1973JOHNSON et al 1973JOHNSON et al 1973SELANDER et al 1970GOOCH and SCHOPF 1972GOOCH and SCHOPF 1972LEWONTIN and HUBBY 1966PRAKASH et al 1969PRAKASH 1969 11. "on-glucose enzymes' 1 100 KOJlMA et al 1970 1 Excluding and including provisionally polymorphic loci The question has been raised as to whether the levels of heterozygosity vary in a significant and possibly meaningful way among different systematic groups of animals.…”

Section: Resultsmentioning

confidence: 98%

Genetics of Zoarces populations

Frydenberg

Simonsen

2009

Hereditas

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Hemoglobin and 23 enzymes have been scored for electrophoretic variants in two presumably large populations of Zoarces viviparus L. The 24 proteins investigated are supposedly determined by 32 gene loci. Using the criterion that a locus is polymorphic when it carries two or more alleles each occurring with a gene frequency of at least 0.01, 28 and 31 per cent of the loci were found to be polymorphic in the two populations. The degree of heterozygosity, i.e. the average percentage of loci heterozygous in a randomly chosen individual, was eight and ten per cent respectively. This degree of heterozygosity is higher than recent estimates for man, a number of rodents and reptiles and three species of rockfish. On the other hand, the degree observed is of the order of magnitude of estimates obtained for two other species of bony fishes, and it is decidedly smaller than most estimates available for various Drosophilu species. The hypothesis proposed by GILLISPIE and KOJIMA (1968), that glucose-metabolizing enzymes tend to be less polymorphic than non-glucose-metabolizingenzymes, is not supported by the data from Zoarces.

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“…Nevertheless, at the Mdh-l locus a significant heterozygote excess was detected in the high-shore habitat. Gooch & Schopf (1971) suggested heterozygote superiority in variable conditions as an explanation for heterozygote excess detected in a population of marine ectoprocts. Evidence for selection favouring heterozygotes in more variable high intertidal zones has been detected in Mytilus (Koehn et al 1973(Koehn et al , 1976.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have attempted to correlate genetic and environmental variation for marine invertebrates (e.g., Gooch & Schopf 1972;Siebenaller 1978;Nelson & Hedgecock 1980). Microgeographic differentiation in relation to intertidal gradients has been reported (e.g., Johnson 1971;Koehn et al 1973;Levinton & Fundiller 1975).…”

Section: Introductionmentioning

confidence: 99%

Enzyme variation in marine and estuarine populations of the chitonSypharochiton pelliserpentis

Freeth¹,

Sin²

1986

New Zealand Journal of Marine and Freshwater Research

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Enzyme variation in sheltered-and exposed-marine populations and an estuarine mudflat population of the chiton Sypharochiton pelliserpentis was examined by polyacrylamide gel electrophoresis. Six loci were analysed, of which Idh-l, Idh-2, and Me-l were monomorphic and Est-2, Mdh-l, and Me-2 were polymorphic. All populations shared the same alleles at all loci. A heterozygote deficiency was detected at the Est-2 locus for the exposed-marine population and a heterozygote excess was found at the Mdh-l locus for the sheltered-marine population where allele frequencies were associated with chiton age. Differences were found in allele frequencies between the sheltered-and exposed-marine populations at the Est-2 locus and between females of the marine and estuarine populations at Mdh-1 locus. The Idh-2 locus showed variation in enzyme activity which was neither age nor sex specific, but appeared to be associated with different habitats. Marine population subsamples from high-shore and low-shore levels showed no significant differences in allele frequencies.

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Genetic Variability in the Deep Sea: Relation to Environmental Variability

Cited by 85 publications

References 17 publications

Deep-Sea Asteroids: High Genetic Variability in a Stable Environment

Deep-Sea Asteroids: High Genetic Variability in a Stable Environment

Genetics of Zoarces populations

Enzyme variation in marine and estuarine populations of the chitonSypharochiton pelliserpentis

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