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Evolution of foraging strategies on resource gradients
Tekijät: Heino M, Parvinen K, Dieckmann U
Kustantaja: EVOLUTIONARY ECOLOGY LTD
Julkaisuvuosi: 2008
Journal: Evolutionary Ecology Research
Tietokannassa oleva lehden nimi: EVOLUTIONARY ECOLOGY RESEARCH
Lehden akronyymi: EVOL ECOL RES
Vuosikerta: 10
Numero: 8
Aloitussivu: 1131
Lopetussivu: 1156
Sivujen määrä: 26
ISSN: 1522-0613
Tiivistelmä
Results: (1) When expressed its instantaneous rates with the same units (time(-1)), mortality risks (d), foraging costs (c), and resource qualities (q) all influence the evolutionarily stable distribution of foraging effort through the dimensionless expression (d + c)/q. (2) Functional responses that imply intake saturation may result in a subset of resources remaining entirely unused. (3) Coupling foraging to resource dynamics results in a rich array of evolutionary outcomes, depending on the type of competition among foragers and the interplay between forager and resource characteristics. (4) Genetic constraints may cause foraging effort to track the resource gradient more coarsely than classical models predict.
Results: (1) When expressed its instantaneous rates with the same units (time(-1)), mortality risks (d), foraging costs (c), and resource qualities (q) all influence the evolutionarily stable distribution of foraging effort through the dimensionless expression (d + c)/q. (2) Functional responses that imply intake saturation may result in a subset of resources remaining entirely unused. (3) Coupling foraging to resource dynamics results in a rich array of evolutionary outcomes, depending on the type of competition among foragers and the interplay between forager and resource characteristics. (4) Genetic constraints may cause foraging effort to track the resource gradient more coarsely than classical models predict.
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