|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Evolution ecology of clonal-bisexual complexes in spined loaches from genus Cobitisтезисы доклада
- Авторы: Vasil’ev V.P., Lebedeva E.B., Vasil’eva E.D.
- Сборник: International loach conference 2010. Prague, Czech Republic. Book of abstracts
- Тезисы
- Год издания: 2010
- Место издания: Českà Zemědělskà Univerzita v Praze Prague, Czech Republic
- Первая страница: 0-2
- Аннотация: Several aspects of evolutionary ecology of the spined loach clonal-bisexual complexes are analysed. This analysis demonstrates that the twofold population growth rate in clonal forms compared with bisexual species is not a proper feature of spined loaches, because their clonal forms are polyploids with the larger eggs and correspondingly the lower individual fecundity. Both the larger nutrient stores in eggs and the larger hatchlings provide certain ecological advantages for clonal spined loach triploids at early stages of their ontogeny and possibly ensure the higher fitness in a local environment. The clonal-bisexual spined loach complexes have reduced structure usually including one bisexual species and the only clonal form. This reduction may be caused by several factors: 1) the competition between different forms and subsequent superseding of some of them; 2) a particular manner of colonization of new areas by different bisexual and clonal forms; 3) the absorption of one of parental species for hybrid origins of clonal forms (hypothesis of absorption).
- Добавил в систему: Васильева Екатерина Денисовна