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Ecol Lett

Title:		Maternally induced intraclutch cannibalism: an adaptive response to predation risk?
Author(s):		Tigreros N; Norris RH; Wang EH; Thaler JS;
Address:		"Department of Entomology, Cornell University, Ithaca, NY, 12854, USA. Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 12854, USA"
Journal Title:		Ecol Lett
Year:		2017
Volume:		20170310
Issue:		4
Page Number:		487 - 494
DOI:		10.1111/ele.12752
ISSN/ISBN:		1461-0248 (Electronic) 1461-023X (Linking)
Abstract:		"Theory on condition-dependent risk-taking indicates that when prey are in poor condition, their anti-predator responses should be weak. However, variation in responses resulting from differences in condition is generally considered an incidental by-product of organisms living in a heterogeneous environment. Using Leptinotarsa decemlineata beetles and stinkbug (Podisus maculiventris) predators, we hypothesised that in response to predation risk, parents improve larval nutritional condition and expression of anti-predator responses by promoting intraclutch cannibalism. We showed that mothers experiencing predation risk increase production of unviable trophic eggs, which assures provisioning of an egg meal to the newly hatched offspring. Next, we experimentally demonstrated that egg cannibalism reduces L. decemlineata vulnerability to predation by improving larval nutritional condition and expression of anti-predator responses. Intraclutch cannibalism in herbivorous insects might be a ubiquitous strategy, aimed to overcome the dual challenge of feeding on protein-limited diets while living under constant predation threat"
Keywords:		Animals *Cannibalism Coleoptera/growth & development/*physiology Female *Food Chain Heteroptera/growth & development/*physiology Larva/growth & development/physiology Male Nymph/growth & development/physiology Colorado potato beetle maternal effects preda;
Notes:		"MedlineTigreros, Natasha Norris, Rachel H Wang, Eugenia H Thaler, Jennifer S eng Research Support, U.S. Gov't, Non-P.H.S. England 2017/03/16 Ecol Lett. 2017 Apr; 20(4):487-494. doi: 10.1111/ele.12752. Epub 2017 Mar 10"