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Siblicide and life-history evolution in parasitoids

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Siblicide and life-history evolution in parasitoids. / Pexton, J J ; Mayhew, P J .

In: Behavioral Ecology, Vol. 13, No. 5, 09.2002, p. 690-695.

Research output: Contribution to journalArticle

Harvard

Pexton, JJ & Mayhew, PJ 2002, 'Siblicide and life-history evolution in parasitoids', Behavioral Ecology, vol. 13, no. 5, pp. 690-695.

APA

Pexton, J. J., & Mayhew, P. J. (2002). Siblicide and life-history evolution in parasitoids. Behavioral Ecology, 13(5), 690-695.

Vancouver

Pexton JJ, Mayhew PJ. Siblicide and life-history evolution in parasitoids. Behavioral Ecology. 2002 Sep;13(5):690-695.

Author

Pexton, J J ; Mayhew, P J . / Siblicide and life-history evolution in parasitoids. In: Behavioral Ecology. 2002 ; Vol. 13, No. 5. pp. 690-695.

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@article{890626adba9941d4a2859516ffe1c6d6,
title = "Siblicide and life-history evolution in parasitoids",
abstract = "Parasitoid wasps exhibit a stark dichotomy in larval behavior and developmental mode. In gregarious species, siblings developing together tolerate each other; hence more than one individual can successfully complete development. In contrast, solitary species have intolerant larvae that will engage in siblicide, leading to only one individual successfully completing development. Previous theoretical and empirical work has suggested that females from species with intolerant larvae should reduce their relative investment in reproduction. We tested this prediction by measuring investment in survival and reproduction in a pair of sister species from the genus Aphaereta (Hymenoptera: Braconidae). With increasing body size, divergent patterns of investment exist in the two species. Females of the solitary A. genevensis allocate additional resources almost exclusively toward greater fat reserves, resulting in enhanced longevity. Females of the gregarious A. pallipes invest relatively more in reproduction and hence have lower fat reserves, reduced longevity, and greater egg loads than A. genevensis. These differences reflect a trend toward greater investment in survival relative to reproduction in the solitary species, as predicted. We discuss the implications of these findings for the development of sibling rivalry and life-history theory.",
keywords = "Alysiinae, Callosobruchus, fecundity, optimal investment, parasitoids, resource allocation, trade-offs, PARENT-OFFSPRING CONFLICT, CLUTCH SIZE, EGG LOAD, REPRODUCTION, SURVIVAL, EXPECTANCY, WASPS, FAT",
author = "Pexton, {J J} and Mayhew, {P J}",
year = "2002",
month = "9",
language = "English",
volume = "13",
pages = "690--695",
journal = "Behavioral Ecology",
issn = "1045-2249",
publisher = "Oxford University Press",
number = "5",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Siblicide and life-history evolution in parasitoids

AU - Pexton, J J

AU - Mayhew, P J

PY - 2002/9

Y1 - 2002/9

N2 - Parasitoid wasps exhibit a stark dichotomy in larval behavior and developmental mode. In gregarious species, siblings developing together tolerate each other; hence more than one individual can successfully complete development. In contrast, solitary species have intolerant larvae that will engage in siblicide, leading to only one individual successfully completing development. Previous theoretical and empirical work has suggested that females from species with intolerant larvae should reduce their relative investment in reproduction. We tested this prediction by measuring investment in survival and reproduction in a pair of sister species from the genus Aphaereta (Hymenoptera: Braconidae). With increasing body size, divergent patterns of investment exist in the two species. Females of the solitary A. genevensis allocate additional resources almost exclusively toward greater fat reserves, resulting in enhanced longevity. Females of the gregarious A. pallipes invest relatively more in reproduction and hence have lower fat reserves, reduced longevity, and greater egg loads than A. genevensis. These differences reflect a trend toward greater investment in survival relative to reproduction in the solitary species, as predicted. We discuss the implications of these findings for the development of sibling rivalry and life-history theory.

AB - Parasitoid wasps exhibit a stark dichotomy in larval behavior and developmental mode. In gregarious species, siblings developing together tolerate each other; hence more than one individual can successfully complete development. In contrast, solitary species have intolerant larvae that will engage in siblicide, leading to only one individual successfully completing development. Previous theoretical and empirical work has suggested that females from species with intolerant larvae should reduce their relative investment in reproduction. We tested this prediction by measuring investment in survival and reproduction in a pair of sister species from the genus Aphaereta (Hymenoptera: Braconidae). With increasing body size, divergent patterns of investment exist in the two species. Females of the solitary A. genevensis allocate additional resources almost exclusively toward greater fat reserves, resulting in enhanced longevity. Females of the gregarious A. pallipes invest relatively more in reproduction and hence have lower fat reserves, reduced longevity, and greater egg loads than A. genevensis. These differences reflect a trend toward greater investment in survival relative to reproduction in the solitary species, as predicted. We discuss the implications of these findings for the development of sibling rivalry and life-history theory.

KW - Alysiinae

KW - Callosobruchus

KW - fecundity

KW - optimal investment

KW - parasitoids

KW - resource allocation

KW - trade-offs

KW - PARENT-OFFSPRING CONFLICT

KW - CLUTCH SIZE

KW - EGG LOAD

KW - REPRODUCTION

KW - SURVIVAL

KW - EXPECTANCY

KW - WASPS

KW - FAT

M3 - Article

VL - 13

SP - 690

EP - 695

JO - Behavioral Ecology

T2 - Behavioral Ecology

JF - Behavioral Ecology

SN - 1045-2249

IS - 5

ER -