Eur. J. Entomol. 102 (3): 513-518, 2005 | DOI: 10.14411/eje.2005.073
Kin recognition and avoidance of kin cannibalism by the larvae of co-occurring ladybirds: a laboratory study
- Ladybird Research Laboratory, Department of Zoology, University of Lucknow, 226 007 Lucknow, India;
The role of relatedness and diet in kin recognition was investigated in the aphidophagous ladybirds Propylea dissecta and Coccinella transversalis. Third instar larvae of both species exhibited kin recognition, as they were reluctant to consume related first instar larvae. They spent significantly more time prior to cannibalism when interacting with genetically related victims; this indicates the presence of a kin recognition system. Kin recognition, however, was not evident in fourth instar larvae as they ate both related and unrelated victims. This result reveals that the need of fourth instar larvae to attain a critical weight for pupation might subdue kin recognition. The diet of cannibals did not affect cannibalism, number of encounters or time that elapsed prior to cannibalism. This indicates that kin recognition is not dependent on exogenous cues derived from the diets of the cannibal and victim.
Keywords: Coccinellidae, Coccinella transversalis, Propylea dissecta, cannibalism, kin recognition, endogenous cues, exogenous cues
Received: September 20, 2004; Accepted: April 26, 2005; Published: August 15, 2005 Show citation
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