Wyniki wyszukiwania

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Developmental stability of the mink Mustela vison under the impact of PCB

100%

Borisov V. I., Baranov A. S., Valetsky A. V., Zakharov V. M.

Acta Theriologica. Supplement

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1997

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nr 04

Females of the American mink Mustela vison Schreber, 1777 were fed on various fractions of comercial PCB. Developmental stability of their progeny was studied. Developmental stability was measured by the value of fluctuating asymmetry, and the frequency of phenodeviants of osteological and dermatoglyphic characters. All these measures proved to be significantly higher in the experimental intoxicated groups than in the control group, thus indicating deterioration of developmental stability from PCB.

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Inbreeding and outbreeding impact on developmental stability of laboratory rat Rattus norvegicus

88%

Borisov V. I., Valetsky A. V., Dmitrieva I. L., Krushinskaya N. L., Zakharov V. M.

Acta Theriologica. Supplement

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1997

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nr 04

Developmental stability analysis was conducted for three strains of laboratory rat Rattus norvegicus Berkenhout, 1769 and their hybrids. Developmental stability was estimated by fluctuating asymmetry of 20 characters of skull morphology. A decrease was revealed in fluctuating asymmetry for the inbred strains and for the hybrids of genetically different strains. There were not any differences in fluctuating asymmetry between the homo- and heterozygotes for the separate locus. This support the hypothesis of the dependence of developmental stability on general genetic coadaptation.

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Developmental stability and population dynamics of shrews Sorex in Central Siberia

76%

Zakharov V. M., Demin D. V., Baranov A. S., Borisov V. I., Valetsky A. V., Sheftel B. I.

Acta Theriologica. Supplement

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1997

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nr 04

We examined temporal variation in developmental stability measured by fluctuating asymmetry of 10 skull characters in sympatric populations of three shrew species: Sorex araneus Linnaeus, 1758, S. caecutiens Laxmann, 1788 and S. tundrensis Merriam, 1900 from one locality in central Siberia with a high four-year-cycle of small mammals. Simultaneous significant changes in developmental stability have been revealed during a population cycle 1986-1989 for all three, most abundant shrew species in the locality. The highest asymmetry for all these species occurred in the year of maximal density. Similar high asymmetry was found for the separate samples of two other species: S. roboratus Hollister, 1913 and S. isodon Turov, 1924, collected in a peak year 1989 only. The maximal density in 1989 corresponded to the lowest level of breeding success and developmental stability and, vice versa, minimal density in 1986 was accompanied by the highest level of breeding success and developmental stability. These data suggest that overpopulation caused by high density of various small mammals adversely affects an organism's condition. Thus, developmental stability may be used to monitor possible changes in a population even in cases where direct estimation of fitness is difficult.

Ograniczanie wyników

3 Acta Theriologica. Supplement

3 Borisov V. I.

3 Valetsky A. V.

3 Zakharov V. M.

2 Baranov A. S.

1 Demin D. V.

1 Dmitrieva I. L.

1 Krushinskaya N. L.

1 Sheftel B. I.

3 1997

Developmental stability of the mink Mustela vison under the impact of PCB

Inbreeding and outbreeding impact on developmental stability of laboratory rat Rattus norvegicus

Developmental stability and population dynamics of shrews Sorex in Central Siberia