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RESOURCE ALLOCATION, HYPERPHAGIA, AND COMPENSATORY GROWTH IN JUVENILES
Author(s) -
Gurney William S. C.,
Jones Wayne,
Veitch A. Roy,
Nisbet Roger M.
Publication year - 2003
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.1890/02-0536
Subject(s) - compensatory growth (organ) , ecology , production (economics) , exploit , biology , energy budget , environmental science , economics , microeconomics , computer science , computer security , kidney , endocrinology
Many organisms exploit highly variable food supplies and, as an adaptation to such conditions, show elevated growth during recovery from starvation. In some species this response enables starved and re‐fed individuals to outpace those growing continuously. The main engine of compensatory growth is a relative increase in food ingestion as a reaction to poor nutritional condition. We use a series of mathematical energy‐budget models to investigate the interaction between the mechanisms that control such hyperphagia and those that control internal allocation, with the aim of identifying those strategies that permit overcompensation. We find that hyperphagia alone normally produces weak compensation and can never result in overcompensation. When combined with internal allocation, which routes a fixed fraction of net production to reserves, a strong compensatory response becomes the norm, and overcompensation is frequent.