Nested diets: a novel pattern of individual-level resource use
Many generalist populations may actually be composed of relatively specialist individuals. This 'individual specialization' may have important ecological and evolutionary implications. Although this phenomenon has been documented in more than one hundred taxa, it is still unclear how indiv...
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| Veröffentlicht in: | Oikos 2010, Vol.119 (1), p.81-88 |
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| container_title | Oikos |
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| creator | Araújo, Márcio S Martins, Eduardo G Cruz, Leonardo D Fernandes, Fernanda R Linhares, Arício X dos Reis, Sérgio F Guimarães, Paulo R. Jr |
| description | Many generalist populations may actually be composed of relatively specialist individuals. This 'individual specialization' may have important ecological and evolutionary implications. Although this phenomenon has been documented in more than one hundred taxa, it is still unclear how individuals within a population actually partition resources. Here we applied several methods based on network theory to investigate the intrapopulation patterns of resource use in the gracile mouse opossum Gracilinanus microtarsus. We found evidence of significant individual specialization in this species and that the diets of specialists are nested within the diets of generalists. This novel pattern is consistent with a recently proposed model of optimal foraging and implies strong asymmetry in the interactions among individuals of a population. |
| doi_str_mv | 10.1111/j.1600-0706.2009.17624.x |
| format | Article |
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| source | Jstor Complete Legacy; Wiley Online Library Journals Frontfile Complete |
| subjects | Animal and plant ecology Animal behavior Animal populations Animal, plant and microbial ecology Biological and medical sciences Cerrado Diet Dry seasons Ecological genetics Ecology Fruits Fundamental and applied biological sciences. Psychology General aspects Mammalia Marine ecology Marsupials Natural resources Population ecology Rainy seasons Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution |
| title | Nested diets: a novel pattern of individual-level resource use |
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