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      Capital breeding and income breeding: their meaning, measurement, and worth

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      Ecology
      Wiley-Blackwell

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          Capital and Income Breeding as Alternative Tactics of Resource Use in Reproduction

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            Rapid reversible changes in organ size as a component of adaptive behaviour.

            Organ structures and correlated metabolic features (e.g. metabolic rate) have often taken as fixed attributes of fully grown individual vertebrates. When measurements of these attributes became available they were often used as representative values for the species, disregarding the specific conditions during which the mesurement were made. Evidence is accumulating that the functional size of organs and aspects of the metabolic physiology of an individual may show great flexibility over timescales of weeks and even days depending on physiological status, environmental conditions and behavioural goals. This flexibility is a way for animals to cope successfully with a much wider range of conditions occurring during various life-cycle events than fixed metabolic machinery would allow. Such phenotypic flexibility is likely to be a common adaptive syndrome, typical of vertebrates living in variable environments.
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              Re-examination of the capital and income dichotomy in breeding birds

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                Author and article information

                Journal
                Ecology
                Ecology
                Wiley-Blackwell
                0012-9658
                August 2009
                August 2009
                : 90
                : 8
                : 2057-2067
                Article
                10.1890/08-1369.1
                b9109c7d-a01b-4b45-a36a-96bf6e89247d
                © 2009

                http://doi.wiley.com/10.1002/tdm_license_1.1

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