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Articles 1 - 4 of 4
Full-Text Articles in Ecology and Evolutionary Biology
The Role Of Individual Cognitive And Behavioral Ontogeny In Organization And Evolution Of Social Systems, Andrew G. Fulmer
The Role Of Individual Cognitive And Behavioral Ontogeny In Organization And Evolution Of Social Systems, Andrew G. Fulmer
Dissertations, Theses, and Capstone Projects
Exploration and explanation of the relationship between individual variation in behavior and the composition and adaptive success of social groups or populations are crucial problems in the fields of behavioral ecology, ethology, and comparative psychology. These questions have been the subject of a longstanding discussion at both the proximate and ultimate levels of inquiry. Adaptive mechanisms explaining social decision making, both in terms of affiliative and competitive partner choices, are at the center of such discussions. Inclusive fitness, kin-selection, handicap or prestige, risk seeking and risk avoiding strategies, pay-to-stay/reward principles, as well as other theories have been proposed and supported …
Molecular Tracking Of Individual Host Use In The Shiny Cowbird – A Generalist Brood Parasite, Ma Alicia De La Colina, Mark E. Hauber, Bill M. Strausberger, Juan Carlos Reboreda, Bettina Mahler
Molecular Tracking Of Individual Host Use In The Shiny Cowbird – A Generalist Brood Parasite, Ma Alicia De La Colina, Mark E. Hauber, Bill M. Strausberger, Juan Carlos Reboreda, Bettina Mahler
Publications and Research
Generalist parasites exploit multiple host species at the population level, but the individual parasite’s strategy may be either itself a generalist or a specialist pattern of host species use. Here, we studied the relationship between host availability and host use in the individual parasitism patterns of the Shiny Cowbird Molothrus bonariensis, a generalist avian obligate brood parasite that parasitizes an extreme range of hosts. Using five microsatellite markers and an 1120-bp fragment of the mtDNA control region, we reconstructed full-sibling groups from 359 cowbird eggs and chicks found in nests of the two most frequent hosts in our study area, …
Dynamic Egg Color Mimicry, Daniel Hanley, Michael Sulc, Patricia L. R. Brennan, Mark E. Hauber, Tomas Grim, Marcel Honza
Dynamic Egg Color Mimicry, Daniel Hanley, Michael Sulc, Patricia L. R. Brennan, Mark E. Hauber, Tomas Grim, Marcel Honza
Publications and Research
Evolutionary hypotheses regarding the function of eggshell phenotypes, from solar protection through mimicry, have implicitly assumed that eggshell appearance remains static throughout the laying and incubation periods. However, recent research demonstrates that egg coloration changes over relatively short, biologically relevant timescales. Here, we provide the first evidence that such changes impact brood parasite–host eggshell color mimicry during the incubation stage. First, we use long-term data to establish how rapidly the Acrocephalus arundinaceus Linnaeus (great reed warbler) responded to natural parasitic eggs laid by the Cuculus canorus Linnaeus (common cuckoo). Most hosts rejected parasitic eggs just prior to clutch completion, but …
Eggshell Pigment Composition Covaries With Phylogeny, Kaat Brulez, Ivan Miksik, Christopher R. Cooney, Mark E. Hauber, Paul George Lovell, Golo Maurer, Steven J. Portugal, Douglas Russell, Silas James Reynolds, Phillip Cassey
Eggshell Pigment Composition Covaries With Phylogeny, Kaat Brulez, Ivan Miksik, Christopher R. Cooney, Mark E. Hauber, Paul George Lovell, Golo Maurer, Steven J. Portugal, Douglas Russell, Silas James Reynolds, Phillip Cassey
Publications and Research
No single hypothesis is likely to explain the diversity in eggshell coloration and patterning across birds, suggesting that eggshell appearance is most likely to have evolved to fulfill many nonexclusive functions. By controlling for nonindependent phylogenetic associations between related species, we describe this diversity using museum eggshells of 71 British breeding passerine species to examine how eggshell pigment composition and concentrations vary with phylogeny and with life-history and nesting ecology traits. Across species, concentrations of biliverdin and protoporphyrin, the two main pigments found in eggshells, were strongly and positively correlated, and both pigments strongly covaried with phylogenetic relatedness. Controlling for …