DOES MALLARD CLUTCH SIZE VARY WITH LANDSCAPE COMPOSITION: A DIFFERENT VIEW
نویسندگان
چکیده
منابع مشابه
Multiple aspects of plasticity in clutch size vary among populations of a globally distributed songbird.
Plasticity in life-history characteristics can influence many ecological and evolutionary phenomena, including how invading organisms cope with novel conditions in new locations or how environmental change affects organisms in native locations. Variation in reaction norm attributes is a critical element to understanding plasticity in life history, yet we know relatively little about the ways in...
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Parasites have been argued to influence clutch size evolution, but past work and theory has largely focused on within-species optimization solutions rather than clearly addressing among-species variation. The effects of parasites on clutch size variation among species can be complex, however, because different parasites can induce age-specific differences in mortality that can cause clutch size...
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Life-history theory predicts that for small clutches, variance in egg size (between individuals) should decrease in a predictable invariant manner as clutch size increases. To test this, we studied Daphnia magna at 350 different food treatments and recorded the number of eggs and the volume of each egg for their first clutch. As predicted, we found that the relationship between clutch size and ...
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1. Optimal egg size theory predicts that females should produce propagules of a size and number that maximize maternal fitness. However, studies of the allocation of resources to eggs have rarely provided evidence of such optimization. This is presumably because of constraints that limit reproductive allocation. One such example is that of pelvic aperture morphology constraining egg size in tur...
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The change in avian clutch size with latitude is a celebrated example of geographic variation in a vertebrate life-history trait. Alternative hypotheses for this pattern invoke nest predation, limited food for nestlings, or post-fledging juvenile mortality as selection pressures leading to small clutch size of tropical birds. We manipulated the clutch size of Spotted Antbirds (Hylophylax naevio...
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ژورنال
عنوان ژورنال: The Wilson Bulletin
سال: 2003
ISSN: 0043-5643
DOI: 10.1676/03-064