| Sterol limitation in a pollen-fed omnivorous lady beetle (Coleoptera: Coccinellidae). | |
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MedLine Citation:
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PMID: 19772860 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nutritional constraints of non-prey foods for entomophagous arthropods are seldom investigated, yet are crucial to understanding their nutritional ecology and function within natural and managed environments. We investigated whether pollen from five maize hybrids was of variable quality for the lady beetle, Coleomegilla maculata, whether suitability of these pollens was related with their sterol profiles, and how augmenting sterols (beta-sitosterol, cholesterol, or ergosterol) affected the fitness and performance of C. maculata. Preimaginal survival, development rates, the duration of the pre-oviposition period, post-mortem adult dry weight, adult hind tibial length, sex ratio, fecundity, cohort generation time (T(c)), net replacement rate (R(0)) and intrinsic rate of increase (r) were measured. Individual sterols in the pollens were quantified using GC-MS. Pollens were of variable suitability for C. maculata; the development rate was positively correlated with the amount of 24-methylene-cholesterol and r was positively correlated with episterol and 24-methylene-lophenol found in the pollens. Performance of C. maculata was entirely unaffected by augmenting pollen meals with sterols. This research shows that pollens clearly vary in their sterol contents intraspecifically, which affects their suitability for omnivores that rely on pollen. However, sterols appear to be only one of the limiting nutrients in pollens. |
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Authors:
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Lucia Pilorget; James Buckner; Jonathan G Lundgren |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of insect physiology Volume: 56 ISSN: 1879-1611 ISO Abbreviation: J. Insect Physiol. Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2009-12-16 Completed Date: 2010-03-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985080R Medline TA: J Insect Physiol Country: England |
Other Details:
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Languages: eng Pagination: 81-7 Citation Subset: IM |
Affiliation:
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Agrocampus Ouest Centre de Rennes, 35042 Rennes, France. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Nutritional Physiological Phenomena* Animals Beetles / growth & development* Female Male Oviparity Pollen / chemistry* Sterols / analysis* Zea mays / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Sterols |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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