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Article: The demands of incubation and avian clutch size

TitleThe demands of incubation and avian clutch size
Authors
KeywordsAvian Ecology
Breeding
Energy Expenditure
Evolution
Incubation
Metabolic Demands
Optimal Clutch Site
Reproductive Success
Issue Date1998
Citation
Biological Reviews Of The Cambridge Philosophical Society, 1998, v. 73 n. 3, p. 293-304 How to Cite?
AbstractWe reviewed information on the demands of incubation to examine whether these could influence the optimal clutch size of birds. The results indicate that appreciable metabolic costs of incubation commonly exist, and that the incubation of enlarged clutches can impose penalties on birds. In 23 studies on 19 species, incubation metabolic rate (IMR) was not elevated above the metabolic rate of resting non-incubating birds (RMR), but contrary to the physiological predictions of King and others, IMR was greater than RMR in 15 studies on 15 species. Across species, IMR was substantially above basal metabolic rate (BMR), averaging 1.606 x BMR. Of six studies on three species performed under thermo-neutral conditions, none found IMR to be in excess of RMR. IMRs measured exclusively within the thermo-neutral zone averaged only 1.08 x BMR contrasting with the significantly higher figure of 1.72 x BMR under wider conditions. 16 of 17 studies on procellariiforms found IMR below RMR, indicating a significant difference between this and other orders. We could find no other taxonomic, or ecological factors which had clear effects on IMR. Where clutch size was adjusted experimentally during incubation, larger clutches were associated with: significantly lower percentage hatching success in 11 of 19 studies; longer incubation periods in eight of ten studies; greater loss of adult body condition in two of five studies; and higher adult energy expenditure in eight of nine studies. Given that incubation does involve metabolic costs and given that the demands of incubation increase sufficiently with clutch size to affect breeding performance, we propose that the optimal clutch size of birds may in part by shaped by the number of eggs the parents can afford to incubate.
Persistent Identifierhttp://hdl.handle.net/10722/178617
ISSN
2000 Impact Factor: 6.433
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorThomson, DLen_US
dc.contributor.authorMonaghan, Pen_US
dc.contributor.authorFurness, RWen_US
dc.date.accessioned2012-12-19T09:48:44Z-
dc.date.available2012-12-19T09:48:44Z-
dc.date.issued1998en_US
dc.identifier.citationBiological Reviews Of The Cambridge Philosophical Society, 1998, v. 73 n. 3, p. 293-304en_US
dc.identifier.issn0006-3231en_US
dc.identifier.urihttp://hdl.handle.net/10722/178617-
dc.description.abstractWe reviewed information on the demands of incubation to examine whether these could influence the optimal clutch size of birds. The results indicate that appreciable metabolic costs of incubation commonly exist, and that the incubation of enlarged clutches can impose penalties on birds. In 23 studies on 19 species, incubation metabolic rate (IMR) was not elevated above the metabolic rate of resting non-incubating birds (RMR), but contrary to the physiological predictions of King and others, IMR was greater than RMR in 15 studies on 15 species. Across species, IMR was substantially above basal metabolic rate (BMR), averaging 1.606 x BMR. Of six studies on three species performed under thermo-neutral conditions, none found IMR to be in excess of RMR. IMRs measured exclusively within the thermo-neutral zone averaged only 1.08 x BMR contrasting with the significantly higher figure of 1.72 x BMR under wider conditions. 16 of 17 studies on procellariiforms found IMR below RMR, indicating a significant difference between this and other orders. We could find no other taxonomic, or ecological factors which had clear effects on IMR. Where clutch size was adjusted experimentally during incubation, larger clutches were associated with: significantly lower percentage hatching success in 11 of 19 studies; longer incubation periods in eight of ten studies; greater loss of adult body condition in two of five studies; and higher adult energy expenditure in eight of nine studies. Given that incubation does involve metabolic costs and given that the demands of incubation increase sufficiently with clutch size to affect breeding performance, we propose that the optimal clutch size of birds may in part by shaped by the number of eggs the parents can afford to incubate.en_US
dc.languageengen_US
dc.relation.ispartofBiological Reviews of the Cambridge Philosophical Societyen_US
dc.subjectAvian Ecologyen_US
dc.subjectBreedingen_US
dc.subjectEnergy Expenditureen_US
dc.subjectEvolutionen_US
dc.subjectIncubationen_US
dc.subjectMetabolic Demandsen_US
dc.subjectOptimal Clutch Siteen_US
dc.subjectReproductive Successen_US
dc.titleThe demands of incubation and avian clutch sizeen_US
dc.typeArticleen_US
dc.identifier.emailThomson, DL: dthomson@hku.hken_US
dc.identifier.authorityThomson, DL=rp00788en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1017/S0006323198005180en_US
dc.identifier.scopuseid_2-s2.0-0031710846en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0031710846&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume73en_US
dc.identifier.issue3en_US
dc.identifier.spage293en_US
dc.identifier.epage304en_US
dc.identifier.isiWOS:000076759200003-
dc.identifier.scopusauthoridThomson, DL=7202586830en_US
dc.identifier.scopusauthoridMonaghan, P=7102503350en_US
dc.identifier.scopusauthoridFurness, RW=7103164978en_US

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