Answers are grounded in this paper and cite their sources.
Ruedi G. Nager, Cecile Ruegger, Arie J. Van Noordwijk, Nutrient or Energy Limitation on Egg Formation: A Feeding Experiment in Great Tits, Journal of Animal Ecology, Vol. 66, No. 4 (Jul., 1997), pp. 495-507
No takes yet. Share an insight, caveat, or question.
Nager et al. (1997) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: