NDLI: Experimentally decoupling reproductive investment from energy storage to test the functional basis of a life-history trade-off.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Cox, Robert M. Lovern, Matthew B. Calsbeek, Ryan
Spatial Coverage	Bahamas
Description	Country affiliation: United States Author Affiliation: Cox RM ( Department of Biology, University of Virginia, Charlottesville, VA, 22904, USA.); Lovern MB ( Department of Zoology, Oklahoma State University, Stillwater, OK, 74078, USA.); Calsbeek R ( Department of Biological Sciences, Dartmouth College, Hanover, NH, 03755, USA.)
Abstract	The ubiquitous life-history trade-off between reproduction and survival has long been hypothesized to reflect underlying energy-allocation trade-offs between reproductive investment and processes related to self-maintenance. Although recent work has questioned whether energy-allocation models provide sufficient explanations for the survival cost of reproduction, direct tests of this hypothesis are rare, especially in wild populations. This hypothesis was tested in a wild population of brown anole lizards (Anolis sagrei) using a two-step experiment. First, stepwise variation in reproductive investment was created using unilateral and bilateral ovariectomy (OVX) along with intact (SHAM) control. Next, this manipulation was decoupled from its downstream effects on energy storage by surgically ablating the abdominal fat stores from half of the females in each reproductive treatment. As predicted, unilateral OVX (intermediate reproductive investment) induced levels of growth, body condition, fat storage and breeding-season survival that were intermediate between the high levels of bilateral OVX (no reproductive investment) and the low levels of SHAM (full reproductive investment). Ablation of abdominal fat bodies had a strong and persistent effect on energy stores, but it did not influence post-breeding survival in any of the three reproductive treatments. This suggests that the energetic savings of reduced reproductive investment do not directly enhance post-breeding survival, with the caveat that only one aspect of energy storage was manipulated and OVX itself had no overall effect on post-breeding survival. This study supports the emerging view that simple energy-allocation models may often be insufficient as explanations for the life-history trade-off between reproduction and survival.
File Format	HTM / HTML
ISSN	00218790
e-ISSN	13652656
Journal	Journal of Animal Ecology
Issue Number	4
Volume Number	83
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-07-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Zoology Energy Metabolism Lizards Physiology Longevity Animals Bahamas Ovariectomy Veterinary Reproduction Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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Data from: Experimentally decoupling reproductive investment from energy storage to test the functional basis of a life-history tradeoff (Dataset)

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Experimentally decoupling reproductive investment from energy storage to test the functional basis of a life-history trade-off.

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Data from: Experimentally decoupling reproductive investment from energy storage to test the functional basis of a life-history tradeoff (Dataset)

Behavioral facilitation of reproduction in sexual and unisexual whiptail lizards.

Rapid human-induced divergence of life-history strategies in Bahamian livebearing fishes (family Poeciliidae).

Latitudinal and seasonal variation in reproductive effort of the eastern fence lizard (Sceloporus undulatus).

Life span, reproductive output, and reproductive opportunity in captive Goeldi's monkeys (Callimico goeldii).

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Experimentally decoupling reproductive investment from energy storage to test the functional basis of a life-history trade-off.