NDLI: Chronic parasitic infection alters reproductive output in deer mice

Content Provider	Springer Nature Link
Author	Schwanz, Lisa E.
Copyright Year	2008
Abstract	Parasitized animals may alter their life histories to minimize the costs of parasitism. Organisms are predicted to decrease investment in current reproduction when parasitism has the greatest impact on current reproductive ability. In contrast, if parasitism decreases residual reproductive value, hosts should increase current reproductive investment, referred to as fecundity compensation or terminal investment. In mammalian hosts, parasitic infection most often leads to reductions in current host reproduction, perhaps attributable to the emphasis on parasites that are unlikely to impact the host’s residual reproductive value. In this study, the life history response of a rodent, Peromyscus maniculatus, to infection with a parasite that should strongly impact the residual reproductive value of its host (Schistosomatium douthitti, Trematoda) was examined. Infection decreased survival for hosts exposed to a high dose of parasites and was chronic in survivors, confirming that infection had strong impacts for the residual reproductive value of the host. As predicted, infected mice increased their reproductive output, producing litters of greater mass due to heavier offspring. However, this increased output was observed after a greater delay to begin breeding in infected mice and was not observed in animals that suffered early mortality. The deer mouse S. douthitti system may provide a rare example of fecundity compensation in mammals.
Starting Page	1351
Ending Page	1358
Page Count	8
File Format	PDF
ISSN	03405443
Journal	Behavioral Ecology and Sociobiology
Volume Number	62
Issue Number	8
e-ISSN	14320762
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-02-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life history trade-offs Maternal investment Phenotypic plasticity Schistosome Sex ratio Zoology Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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