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Did extreme nest predation favor the evolution of obligate brood parasitism in a duck?
Ecol Evol
September 2022
Department of Wildlife, Fish, and Conservation Biology University of California, Davis Davis California USA.
Obligate brood parasites depend entirely on other species to raise their offspring. Most avian obligate brood parasites have altricial offspring that require enormous amounts of posthatching parental care, and the large fecundity boost that comes with complete emancipation from parental care likely played a role in the independent evolution of obligate parasitism in several altricial lineages. The evolution of obligate parasitism in the black-headed duck, however, is puzzling because its self-feeding precocial offspring should not constrain parental fecundity of a potential brood parasite in the way that altricial offspring do.
View Article and Find Full Text PDFEpigenetic dynamics in infancy and the impact of maternal engagement.
Sci Adv
October 2019
Department of Psychology, University of Virginia, Charlottesville, VA, USA.
The contribution of nature versus nurture to the development of human behavior has been debated for centuries. Here, we offer a piece to this complex puzzle by identifying the human endogenous oxytocin system-known for its critical role in mammalian sociality-as a system sensitive to its early environment and subject to epigenetic change. Recent animal work suggests that early parental care is associated with changes in DNA methylation of conserved regulatory sites within the oxytocin receptor gene (m).
View Article and Find Full Text PDFThe coevolutionary biology of brood parasitism: a call for integration.
Philos Trans R Soc Lond B Biol Sci
April 2019
6 School of Life and Environmental Sciences, University of Sydney, Sydney 2006 , Australia.
Obligate brood-parasitic cheats have fascinated natural historians since ancient times. Passing on the costs of parental care to others occurs widely in birds, insects and fish, and often exerts selection pressure on hosts that in turn evolve defences. Brood parasites have therefore provided an illuminating system for researching coevolution.
View Article and Find Full Text PDFOffspring dependence on parental care and the role of parental transfer of oral fluids in burying beetles.
Front Zool
August 2018
1Institute of Evolutionary Ecology and Conservation Genomics, University of Ulm, Ulm, Germany.
Background: Immature stages of many animals can forage and feed on their own, whereas others depend on their parents' assistance to obtain or process food. But how does such dependency evolve, and which offspring and parental traits are involved? Burying beetles () provide extensive biparental care, including food provisioning to their offspring. Interestingly, there is substantial variation in the reliance of offspring on post-hatching care among species.
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