Larval food supply constrains female reproductive schedules in Hippodamia convergens (Coleoptera: Coccinellidae)

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dc.contributor.author Vargas, German
dc.contributor.author Michaud, J. P.
dc.contributor.author Nechols, James R.
dc.date.accessioned 2013-02-08T22:20:01Z
dc.date.available 2013-02-08T22:20:01Z
dc.date.issued 2013-02-08
dc.identifier.uri http://hdl.handle.net/2097/15296
dc.description Citation: Vargas, German, J. P. Michaud, and James R. Nechols. 2012. “Larval Food Supply Constrains Female Reproductive Schedules in Hippodamia Convergens (Coleoptera: Coccinellidae).” Annals of the Entomological Society of America 105 (6): 832–39. https://doi.org/10.1603/AN12010.
dc.description.abstract Reproductive schedules are a critical aspect of life history intrinsically linked to a species' ecology. We explored dynamic trajectories of daily fecundity, egg size, and egg fertility in three size classes of Hippodamia convergens Guerin-Meneville produced by varying larval access to food, eggs of Ephestia kuehniella Zeller. Adult pairs were held with ad libitum food and eggs were collected daily, counted, and a subsample measured. Egg fertility declined steeply over 25 clutches in small females, gradually in large females, but remained relatively stable in medium females. In small females, egg size and daily fecundity declined in a linear manner. There was no clear indication of an egg size-number tradeoff. In medium females, both egg size and daily fecundity peaked around the 16th day of oviposition, after which both declined. Large females began oviposition earlier and achieved peak egg size about day 7, and peak fecundity around day 12. Large females thus expressed a larger proportion of their reproductive effort early in adult life, a strategy inferred to be adaptive in the context of aphidophagy; a larger proportion of progeny would develop early in the exponential growth phase of the prey population when food is most abundant. Increases in egg size during this period may improve the survival of later-developing progeny; prey become scarce as aphid outbreaks decline and competition intensifies, favoring offspring with a larger body size at eclosion. Larval diet restriction appeared to constrain these presumably adaptive changes in egg size and daily fecundity, largely through effects on maternal body size. en_US
dc.language.iso en_US en_US
dc.relation.uri https://doi.org/10.1603/AN12010 en_US
dc.rights This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America. en_US
dc.rights.uri https://academic.oup.com/journals/pages/self_archiving_policy_b
dc.subject Aphidophagy en_US
dc.subject Egg size en_US
dc.subject Fecundity en_US
dc.subject Maternal effect en_US
dc.subject Reproductive effort en_US
dc.title Larval food supply constrains female reproductive schedules in Hippodamia convergens (Coleoptera: Coccinellidae) en_US
dc.type Text en_US
dc.date.published 2012 en_US
dc.citation.doi 10.1603/AN12010 en_US
dc.citation.epage 839 en_US
dc.citation.issn 0013-8746
dc.citation.issue 6 en_US
dc.citation.jtitle Annals of the Entomological Society of America en_US
dc.citation.spage 832 en_US
dc.citation.volume 105 en_US
dc.citation Vargas, German, J. P. Michaud, and James R. Nechols. 2012. “Larval Food Supply Constrains Female Reproductive Schedules in Hippodamia Convergens (Coleoptera: Coccinellidae).” Annals of the Entomological Society of America 105 (6): 832–39. https://doi.org/10.1603/AN12010.
dc.contributor.authoreid jnechols en_US
dc.contributor.authoreid jpmi en_US
dc.description.version Article: Publisher version


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