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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Variation Structure of the Reproductive Characteristics in Rana temporaria and Their Relationship with Size and Age of the Frogстатья
- Авторы: Lyapkov S.M., Kornilova M.B., Severtsov A.S.
- Журнал: Entomological Review
- Том: 82
- Номер: s2
- Год издания: 2002
- Издательство: Scripta Technica
- Местоположение издательства: United States
- Первая страница: 275
- Последняя страница: 289
- Аннотация: Based of the long-term studies of breeding Rana temporaria females, the components of intrapopulation variation of body size and reproductive characteristics were described, and the structure of relationship between them was estimated. The relegation of individuals to a certain generation was determined by skeletochronology. Within each generation female body length, fecundity, and egg size, but not reproductive effort and the relative clutch mass increased with aging. Both the increase and decrease of annual average values of body length, fecundity and egg size in females of different generations in the same years were revealed. Both body size and age of the frogs correlated positively and significantly with their fecundity and egg size. As shown by principal component analysis, each character (except for reproductive effort strongly influenced by fecundity) varied independently. Relationship between separate pairs of characters demonstrated the same relative independence. The weaker relationship of the relative clutch mass with age (compared to the other characters), intergeneration and annual variation is stipulated by the maximum investment of females in each reproduction, the latter characteristic correlating poorly with age and size of females.
- Добавил в систему: Ляпков Сергей Марленович