Optimal foraging for specific nutrients in predatory beetles
Open Access
- 11 January 2012
- journal article
- Published by The Royal Society in Proceedings. Biological sciences
- Vol. 279 (1736), 2212-2218
- https://doi.org/10.1098/rspb.2011.2410
Abstract
Evolutionary theory predicts that animals should forage to maximize their fitness, which in predators is traditionally assumed equivalent to maximizing energy intake rather than balancing the intake of specific nutrients. We restricted female predatory ground beetles (Anchomenus dorsalis) to one of a range of diets varying in lipid and protein content, and showed that total egg production peaked at a target intake of both nutrients. Other beetles given a choice to feed from two diets differing only in protein and lipid composition selectively ingested nutrient combinations at this target intake. When restricted to nutritionally imbalanced diets, beetles balanced the over- and under-ingestion of lipid and protein around a nutrient composition that maximized egg production under those constrained circumstances. Selective foraging for specific nutrients in this predator thus maximizes its reproductive performance. Our findings have implications for predator foraging behaviour and in the structuring of ecological communities.Keywords
This publication has 48 references indexed in Scilit:
- Nutritional geometry: gorillas prioritize non-protein energy while consuming surplus proteinBiology Letters, 2011
- Nutrient regulation in a predator, the wolf spider Pardosa prativagaAnimal Behaviour, 2011
- Dome-shaped functional response induced by nutrient imbalance of the preyBiology Letters, 2011
- Colony nutrition skews reproduction in a social spiderBehavioral Ecology, 2008
- Lifespan and reproduction in Drosophila : New insights from nutritional geometryProceedings of the National Academy of Sciences of the United States of America, 2008
- Cannibal crickets on a forced march for protein and saltProceedings of the National Academy of Sciences of the United States of America, 2006
- A mechanistic link between chick diet and decline in seabirds?Proceedings. Biological sciences, 2005
- Response of pigeon guillemots to variable abundance of high-lipid and low-lipid preyOecologia, 2002
- Nutrient composition of the prey's diet affects growth and survivorship of a generalist predatorOecologia, 2001
- Quantifying food limitation of arthropod predators in the fieldOecologia, 1998