Clutch size and malarial parasites in female great tits
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Clutch size and malarial parasites in female great tits
life-history models predict an evolutionary trade-off in the allocation of resources to current versus future reproduction. This corresponds, at the physiological level, to a trade-off in the allocation of resources to current reproduction or to the immune system, which will enhance survival and therefore future reproduction. For clutch size, life-history models predict a positive correlation b...
متن کاملFitness cost of incubation in great tits (Parus major) is related to clutch size.
Life-history theory predicts that parents produce the number of offspring that maximizes their fitness. In birds, natural selection on parental decisions regarding clutch size may act during egg laying, incubation or nestling phase. To study the fitness consequences of clutch size during the incubation phase, we manipulated the clutch sizes during this phase only in three breeding seasons and m...
متن کاملDoes clutch size evolve in response to parasites and immunocompetence?
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...
متن کاملMetabolic rate of nocturnal incubation in female great tits Parus major in relation to clutch size measured in the natural environment
To study clutch size related energetic costs of incubation, clutch sizes were experimentally manipulated and metabolic rate of female great tits Parus major (L.) during nocturnal incubation (MRinc) was measured with the use of mobile oxygen analysers. Each individual was repeatedly measured, while incubating either reduced, control or enlarged clutches. In contrast to most previous studies, the...
متن کاملMetabolic rate of nocturnal incubation in female great tits, Parus major, in relation to clutch size measured in a natural environment.
To study the energetic costs of incubation in relation to clutch size, clutch sizes were manipulated and the metabolic rate of female great tits, Parus major (Linnaeus), during nocturnal incubation (MR(inc)) was measured using mobile oxygen analysers. Individuals were measured on consecutive nights while incubating their own or manipulated clutches. The experiment was performed under field cond...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 1997
ISSN: 1045-2249,1465-7279
DOI: 10.1093/beheco/8.2.148