noun[mass noun] Zoology
The killing of a sibling or siblings, as a behaviour pattern typical in various animal groups.
- Asymmetric larval mobility and the evolutionary transition from siblicide to nonsiblicidal behavior in parasitoid wasps
- The vast majority of this mortality is due to food shortage and/or siblicide, though predation can also be a significant source of mortality.
- Because obligate siblicide typically occurs shortly after the second chick hatches, brood size does not vary for the majority of the nestling period.
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