Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Causes and Consequences of Differential Growth in Birds: A Behavioral Perspective
AU - Mainwaring, Mark C.
AU - Hartley, Ian R.
PY - 2012
Y1 - 2012
N2 - Avian growth consists of the coordinated development of a number of morphological characters that may involve developmental plasticity and trade-offs. Interspecific studies show that the selection pressure from the risk of predation has driven the evolution of faster development, with ground-nesting taxa tending to have precocial offspring and cavity-nesting taxa having altricial offspring. Intraspecific studies, meanwhile, show that while nestlings preferably allocate resources to body mass and structural size increases, they also show a variety of trade-offs when experiencing adverse conditions in the nest. Between-brood studies show that in response to high levels of sibling competition and ectoparasites, nestlings allocate resources toward gape and wing development, thereby facilitating effective sibling competition and rapid fledging, respectively. Within-brood studies, meanwhile, show that, when genotypic and/or phenotypic inequalities result in asymmetric sibling competition, the smaller nestling/s generally allocate resources toward wing growth which facilitates simultaneous fledging with their larger siblings. Therefore, growth trade-offs are adaptive in the short term, but the limited evidence suggests that they are maladaptive in the long term, as allocating resources away from body mass results in lower postfledging survival.
AB - Avian growth consists of the coordinated development of a number of morphological characters that may involve developmental plasticity and trade-offs. Interspecific studies show that the selection pressure from the risk of predation has driven the evolution of faster development, with ground-nesting taxa tending to have precocial offspring and cavity-nesting taxa having altricial offspring. Intraspecific studies, meanwhile, show that while nestlings preferably allocate resources to body mass and structural size increases, they also show a variety of trade-offs when experiencing adverse conditions in the nest. Between-brood studies show that in response to high levels of sibling competition and ectoparasites, nestlings allocate resources toward gape and wing development, thereby facilitating effective sibling competition and rapid fledging, respectively. Within-brood studies, meanwhile, show that, when genotypic and/or phenotypic inequalities result in asymmetric sibling competition, the smaller nestling/s generally allocate resources toward wing growth which facilitates simultaneous fledging with their larger siblings. Therefore, growth trade-offs are adaptive in the short term, but the limited evidence suggests that they are maladaptive in the long term, as allocating resources away from body mass results in lower postfledging survival.
KW - TASTY CHICK HYPOTHESIS
KW - EARLY DEVELOPMENTAL CONDITIONS
KW - LIFE-HISTORY CONSEQUENCES
KW - BARN SWALLOW NESTLINGS
KW - RED-WINGED BLACKBIRD
KW - CELL-MEDIATED-IMMUNITY
KW - PARENT-OFFSPRING CONFLICT
KW - EXTRA-PAIR PATERNITY
KW - FEMALE REPRODUCTIVE SUCCESS
KW - FLYCATCHER FICEDULA-ALBICOLLIS
U2 - 10.1016/B978-0-12-394288-3.00006-X
DO - 10.1016/B978-0-12-394288-3.00006-X
M3 - Journal article
VL - 44
SP - 225
EP - 277
JO - Advances in the Study of Behavior
JF - Advances in the Study of Behavior
SN - 0065-3454
ER -