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The egg stacking strategy: Reproduct...

Deas, Joseph Benjamin, Jr.

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The egg stacking strategy: Reproductive plasticity in response to egg parasitism in Mimosestes amicus.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The egg stacking strategy: Reproductive plasticity in response to egg parasitism in Mimosestes amicus./
作者:	Deas, Joseph Benjamin, Jr.
面頁冊數:	135 p.
附註:	Source: Dissertation Abstracts International, Volume: 74-08(E), Section: B.
Contained By:	Dissertation Abstracts International74-08B(E).
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3559315
ISBN:	9781303043307

The egg stacking strategy: Reproductive plasticity in response to egg parasitism in Mimosestes amicus.
Deas, Joseph Benjamin, Jr.

The egg stacking strategy: Reproductive plasticity in response to egg parasitism in Mimosestes amicus. - 135 p.

Source: Dissertation Abstracts International, Volume: 74-08(E), Section: B.

Thesis (Ph.D.)--The University of Arizona, 2013.

All organisms live in environments that are variable across space and time. Variation in selection across these environments may lead to the evolution of generalist genotypes that express phenotypic plasticity, in which one genotype can alter their phenotype (e.g., morphology, behavior, physiology) to match changes in environmental conditions, so that they may survive across a range of environments. In many egg-laying organisms that lack parental care, choosing an oviposition site is critical. The egg is an immobile stage of an animal's life cycle and mothers must balance a complex set of risks in deciding where to place their eggs. Because many biotic and abiotic factors are sources of selection on offspring survival, there is an advantage for females to evolve strategies in oviposition site selection to improve survival. This dissertation focuses on phenotypic plasticity in an offspring protection strategy that is triggered by natural enemies.

ISBN: 9781303043307Subjects--Topical Terms:

1017726
Biology, Ecology.

The egg stacking strategy: Reproductive plasticity in response to egg parasitism in Mimosestes amicus.
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500 $a Adviser: Martha S. Hunter.
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520 $a In the seed beetle Mimosestes amicus (Coleoptera: Chrysomelidae: Bruchinae), females lay eggs on the outside of seed pods of legume trees and beetle larvae bore into and develop in the limited and discrete tissue of the seed. While most eggs are laid singly, I documented that beetle females superimpose eggs atop each other ("egg stacking") in response to the presence of egg parasitoids or parasitized eggs. In my first chapter, I investigated whether egg stacking is a strategy for protecting eggs from parasitism. In my second chapter, I examined female responses to variation in the number and dispersion of parasitized eggs on seed pods. Lastly, I investigated whether the intensity of stacking was affected by egg limitation (the risk of depleting her eggs before utilizing all hosts) or time limitation (losing reproductive ability or dying before laying all of her eggs). This study is unique in that it extends life history theory on egg and time costs to explain variation in egg protection behavior. The insights gained from this dissertation provide a foundation upon which we can examine how interactions among trophic levels impact the behavioral decisions made by insects that allow them to increase offspring survival.
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