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Non-mimetic shiny cowbird nestlings escape discrimination by baywings in absence of host nest mates
(Springer, 2019-09)
Nestlings of obligate brood parasites must obtain resources from heterospecific hosts that are attuned to the solicitation behaviours of their own progeny. Failing to match the appropriate stimuli may result in suboptimal ...
Sex-specific costs of rearing a nestling and its implications in the brood sex ratio of Magellanic penguins
(Springer, 2021-08)
In birds, possible explanations for a bias in brood sex ratio include differential cost of rearing nestlings of different sexes, and different parental fitness returns related to offspring sex. We studied brood sex ratio ...
Parental body condition and high energy value of fish determine nestling success in Magellanic penguin (Spheniscus magellanicus)
(Springer, 2018-06)
Nestling growth and survival of marine birds are influenced by multiple factors. Oceanic conditions influence food availability and energy value of the diet and affect nestling condition. Climate variables, like heavy ...
Quantifying the relative importance of direct and indirect effects influencing bird nestling growth
(John Wiley & Sons Inc., 2021-04)
Nestling growth parameters are integral components of avian life-history strategies as they are crucial determinants of individual survival. Although many factors impact on nestling growth, the relative contribution of ...
Reduction of nestlings' vocalizations in response to parental alarm calls in the Southern House Wren, Troglodytes musculus
(Wiley Blackwell Publishing, Inc, 2011-04)
Breeding birds often give alarm calls when a predator is near the nest. These calls have been proposed to serve as distraction displays for the predator, alerts for a mate conveying information about the presence of a ...
Intestinal digestive enzyme modulation in house sparrow nestlings occurs within 24 h of a change in diet composition
(Company of Biologists, 2017-08)
Nestling house sparrows near fledging age (12 days) were previously found to reversibly modulate the activity of their intestinal digestive enzymes in response to changes in diet composition. However, it is not known how ...
Food Delivery Rates Increased with Forest Canopy Cover and Nestling Growth Improved with Arachnids in the Masked Gnatcatcher Polioptila dumicola
(Polish Academy of Sciences. Museum and Institute of Zoology, 2020-02)
Food resources are linked to habitat characteristics and are one of the most important forces which constrain avian life histories. Availability of food affects avian body condition and strongly determines avian breeding ...
Parental investment in eggs and its effect on nestling growth and survival in Magellanic Penguins
(Csiro Publishing, 2014)
Life-history variables evolve in response to cost-benefit trade-offs. For birds, larger eggs are thought to be beneficial for development of offspring but are energetically costly to produce. Further, egg-size dimorphism ...
Brood parasitic nestlings benefit from unusual host defenses against botfly larvae (Philornis spp.)
(Springer, 2019-11)
Brood parasitic birds lay their eggs into the nests of other birds, abandoning parental care of their nestlings to the unsuspecting hosts. Parasite and host nestlings may themselves be parasitized by botfly larvae (Philornis: ...