Lack's clutch size
Lack’s fitness trade-off between current reproduction and future survival has been documented in a number of species (e.g., Lack, 1954; Boyce and Perrins, 1987; Tinbergen and Daan, 1990; Daan et al., 1990). It is illustrated in Fig. 1 for the great tit and the kestrel. Both species have a natural brood size with a higher fitness than could be obtained from manipulated broods that were either larger or smaller than the natural brood size.
- Boyce, M.S., and C.M. Perrins 1987. Optimizing great tit clutch size in a fluctuating environment. Ecology 68:142--153.
- Daan, S., C.Dikstra and J.M. Tinbergen 1990. Family planning in the kestrel ( Falco tinnunculus): The ultimate control of covariation of laying data and clutch size. Behavior 114:83--116.
- Lack, D. 1954. The natural regulation of animal numbers. Oxford University Press, Oxford.
- Tinbergen, J.M., and S.Daan 1990. Family planning in the great tit ( Parus major): Optimal clutch size as integration of parent and offspring fitness. Behavior 114:161--190.