Изменчивость муравьев Solenopsis richteri и S. wagneri (Hymenoptera, Formicidae): статистический анализ морфометрических признаков

Длусский, Г.М.; Федосеева, Е.Б.; Томпсон, Л.Ч.

Авторы: Длусский Г.М., Федосеева Е.Б., Томпсон Л.Ч.
Журнал: Успехи современной биологии
Том: 118
Номер: 3
Год издания: 1998
Издательство: ФГБУ "Издательство "Наука"
Местоположение издательства: Москва
Первая страница: 283
Последняя страница: 298
Аннотация: Fire ants Solenopsis richteri and S. wagneri = S. invicta were introduced into USA from South America in the first half of XX century resulting in formation of a zone of interspecific hybridization there. Considering both medical and scientific aspects of introduction, the taxonomic status of initial forms needs testing. Morphological distinctions between ants-workers in both species from North American populations beyond the hybrid zone were estimated. Ants were collected from nests in 9 sites in Florida, Alabama, Missisippi and Georgia in September-October 1994. Each population sample (65- 300 specimens) included workers of 5-20 nests with equal proportions of major-, minor- and middlesized ants from each nest. Values of special indices calculated on measured parameters (dimensions of head, mezosoma and their parts, quantity of black pixels on computer images of standard and test specimens) expressed gradations of the characters employed in species distinction - head and mezosoma shape, head capsule coloration. Frequency distributions of index values represent the variability of respective characters. The overlap of distributions and significant difference between average means were evaluated. Contrary to coloration, other indices markedly correlated with worker size, therefore their distributions were compared by size classes. "Non-hybrid" populations of S. richteri and S. wagneri have discrete difference in coloration of worker's head and significantly differ in the average means of indices characterizing head shape that counts in favour of their species status. Nevertheless, except coloration, the distributions of characters on head and mezosoma shape greatly overlap in all size classes. Application of these characters is unsuitable in practice. Possible influence of "bottle-neck" effect on variation in imported fire ants is discussed.
Добавил в систему: Длусский Геннадий Михайлович

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Изменчивость муравьев Solenopsis richteri и S. wagneri (Hymenoptera, Formicidae): статистический анализ морфометрических признаковстатья

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