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Plasma Mammalian Leptin Analogue Predicts Reproductive Phenology, But Not Reproductive Output In A Capital-Income Breeding Seaduck, Holly L. Hennin, Pierre Legagneux, H. Grant Gilchrist, Joël Bêty, John P. Mcmurtry, Oliver P. Love
Plasma Mammalian Leptin Analogue Predicts Reproductive Phenology, But Not Reproductive Output In A Capital-Income Breeding Seaduck, Holly L. Hennin, Pierre Legagneux, H. Grant Gilchrist, Joël Bêty, John P. Mcmurtry, Oliver P. Love
Great Lakes Institute for Environmental Research Publications
To invest in energetically demanding life history stages, individuals require a substantial amount of resources. Physiological traits, particularly those related to energetics, can be useful for examining variation in life history decisions and trade-offs because they result from individual responses to environmental variation. Leptin is a protein hormone found in mammals that is proportional to the amount of endogenous fat stores within an individual. Recently, researchers have confirmed that a mammalian leptin analogue (MLA), based on the mammalian sequence of leptin, is present with associated receptors and proteins in avian species, with an inhibitory effect on foraging and body mass …
Higher Rates Of Prebreeding Condition Gain Positively Impacts Clutch Size: A Mechanistic Test Of The Condition-Dependent Individual Optimization Model, Holly L. Hennin, Cody J. Dey, Joël Bêty, H. Grant Gilchrist, Pierre Legagneux, Tony D. Williams, Oliver P. Love
Higher Rates Of Prebreeding Condition Gain Positively Impacts Clutch Size: A Mechanistic Test Of The Condition-Dependent Individual Optimization Model, Holly L. Hennin, Cody J. Dey, Joël Bêty, H. Grant Gilchrist, Pierre Legagneux, Tony D. Williams, Oliver P. Love
Great Lakes Institute for Environmental Research Publications
A combination of timing of and body condition (i.e., mass) at arrival on the breeding grounds interact to influence the optimal combination of the timing of reproduction and clutch size in migratory species. This relationship has been formalized by Rowe et al. in a condition-dependent individual optimization model (American Naturalist, 1994, 143, 689-722), which has been empirically tested and validated in avian species with a capital-based breeding strategy. This model makes a key, but currently untested prediction; that variation in the rate of body condition gain will shift the optimal combination of laying date and clutch size. This prediction is …