Who eats whose eggs? Intra- versus inter-specific interactions in starving ladybird beetles predaceous on aphids
作者:
B.K. Agarwala,
S. Bhattacharya,
P. Bardhanroy,
期刊:
Ethology Ecology & Evolution
(Taylor Available online 1998)
卷期:
Volume 10,
issue 4
页码: 361-368
ISSN:0394-9370
年代: 1998
DOI:10.1080/08927014.1998.9522849
出版商: Taylor & Francis Group
关键词: ladybird beetles;cannibalism;interspecific predation;egg cluster size
数据来源: Taylor
摘要:
Starving adult beetles ofMenochilus sexmaculatusandCoccinella transversalisresorted to intra- and inter-specific predation in the absence of aphid prey. Particularly at high egg densities, predators consumed eggs of their own species much more readily than eggs of the other species. Between the two ladybird species, the eggs of the smaller species,M. sexmaculatus, were less vulnerable to predation from the larger species,C. transversalisthan vice versa. Results further indicate that adult female beetles are capable of discriminating eggs of their own species versus eggs of alien species on physical contact. The adaptive significance of this is discussed.
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