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Sibling and non‐sibling cannibalism by larvae of a lady beetle Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in the field
Author(s) -
Osawa Naoya
Publication year - 1989
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02515813
Subject(s) - cannibalism , harmonia axyridis , biology , coccinellidae , aphid , larva , sibling , zoology , sibling species , predation , ecology , botany , predator , developmental psychology , psychology
Summary Sibling (cannibalism among siblings) and non‐sibling cannibalism (cannibalism among non‐siblings) were studied in a natural population of a lady beetle, Harmonia axyridis Pallas . Of all the eggs laid ( n =2269), 24.76% ( n =562) were killed by sibling cannibalism and 36.10% ( n =819) were killed by non‐sibling cannibalism. Sibling cannibalism occurred constantly and intensively in most egg batches throughout the entire oviposition period. On the other hand, non‐sibling cannibalism was more intense in the middle and late oviposition periods, and when the egg batches were close to an aphid colony. This may be due to the high density of H. axyridis larvae relative to aphid density in the middle and late oviposition periods and also the larvae searching intensively near an aphid colony.