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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-03-13
    Description: The evolution of family life has traditionally been studied in parallel by behavioral ecologists and quantitative geneticists. The former focus on parent-offspring conflict and whether parents or offspring control provisioning, whereas the latter concentrate on the coadaptation of parental supply and offspring demand. Here we show how prenatal effects on offspring begging can link the two different approaches. Using theoretical and experimental analyses, we show that when offspring control provisioning, prenatal effects primarily serve the parent's interests: Selection on parents drives coadaptation of parent and offspring traits. In contrast, when parents control provisioning, prenatal effects primarily serve the offspring's interests: Selection on the offspring drives coadaptation of parent and offspring traits. Parent-offspring conflict may thus be responsible for the selective forces that generate parent-offspring coadaptation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hinde, Camilla A -- Johnstone, Rufus A -- Kilner, Rebecca M -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1373-6. doi: 10.1126/science.1186056.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223985" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Biological ; Animals ; *Behavior, Animal ; Biological Evolution ; *Canaries/growth & development ; *Conflict (Psychology) ; Cues ; Feeding Behavior ; Female ; Genetic Fitness ; *Maternal Behavior ; Nesting Behavior ; *Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2004-08-07
    Description: Young brood parasites that tolerate the company of host offspring challenge the existing evolutionary view of family life. In theory, all parasitic nestlings should be ruthlessly self-interested and should kill host offspring soon after hatching. Yet many species allow host young to live, even though they are rivals for host resources. Here we show that the tolerance of host nestlings by the parasitic brown-headed cowbird Molothrus ater is adaptive. Host young procure the cowbird a higher provisioning rate, so it grows more rapidly. The cowbird's unexpected altruism toward host offspring simply promotes its selfish interests in exploiting host parents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kilner, Rebecca M -- Madden, Joah R -- Hauber, Mark E -- New York, N.Y. -- Science. 2004 Aug 6;305(5685):877-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK. rmk1002@hermes.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15297677" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Feeding Behavior ; Female ; Male ; *Nesting Behavior ; Regression Analysis ; Social Behavior ; Songbirds/growth & development/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2007-08-19
    Description: Cooperative breeding systems are characterized by nonbreeding helpers that assist breeders in offspring care. However, the benefits to offspring of being fed by parents and helpers in cooperatively breeding birds can be difficult to detect. We offer experimental evidence that helper effects can be obscured by an undocumented maternal tactic. In superb fairy-wrens (Malurus cyaneus), mothers breeding in the presence of helpers lay smaller eggs of lower nutritional content that produce lighter chicks, as compared with those laying eggs in the absence of helpers. Helpers compensate fully for such reductions in investment and allow mothers to benefit through increased survival to the next breeding season. We suggest that failure to consider maternal egg-investment strategies can lead to underestimation of the force of selection acting on helping in avian cooperative breeders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russell, A F -- Langmore, N E -- Cockburn, A -- Astheimer, L B -- Kilner, R M -- New York, N.Y. -- Science. 2007 Aug 17;317(5840):941-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK. a.f.russell@sheffield.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17702942" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Body Weight ; *Breeding ; Clutch Size ; *Cooperative Behavior ; Eggs ; Energy Intake ; Female ; *Helping Behavior ; Male ; Oviposition ; Passeriformes/growth & development/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2013-12-21
    Description: The global distribution of cooperatively breeding birds is highly uneven, with hotspots in Australasia and sub-Saharan Africa. The ecological drivers of this distribution remain enigmatic yet could yield insights into the evolution and persistence of cooperative breeding. We report that the global distributions of avian obligate brood parasites and cooperatively breeding passerines are tightly correlated and that the uneven phylogenetic distribution of cooperative breeding is associated with the uneven targeting of hosts by brood parasites. With a long-term field study, we show that brood parasites can acquire superior care for their young by targeting cooperative breeders. Conversely, host defenses against brood parasites are strengthened by helpers at the nest. Reciprocally selected interactions between brood parasites and cooperative breeders may therefore explain the close association between these two breeding systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Feeney, W E -- Medina, I -- Somveille, M -- Heinsohn, R -- Hall, M L -- Mulder, R A -- Stein, J A -- Kilner, R M -- Langmore, N E -- New York, N.Y. -- Science. 2013 Dec 20;342(6165):1506-8. doi: 10.1126/science.1240039.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research School of Biology, The Australian National University, Canberra, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24357317" target="_blank"〉PubMed〈/a〉
    Keywords: Africa, Southern ; *Aggression ; Animal Distribution ; Animals ; Australia ; *Biological Evolution ; *Breeding ; *Cooperative Behavior ; *Nesting Behavior ; Passeriformes/classification/*physiology ; Phylogeny ; Vocalization, Animal
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 397 (1999), S. 667-672 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nestling birds present vivid gapes and produce loud calls as they solicit food, but the complexity of the display is poorly understood. Here we explain the function of reed warbler begging signals and show how they are exploited by the common cuckoo, Cuculus canorus, a brood parasite. Reed warbler ...
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2016-05-12
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
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  • 7
    Publication Date: 2001-09-25
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 8
    Publication Date: 2014-09-12
    Description: Dietary access to carotenoids is expected to determine the strength of carotenoid-based signal expression and potentially to maintain signal honesty. Species that display carotenoid-based yellow, orange, or red plumage are therefore expected to forage selectively for carotenoid-rich foods when they are depositing these pigments during molt, but whether they actually do so is unknown. We set out to address this in the hihi ( Notiomystis cincta ), a New Zealand passerine where males, but not females, display yellow carotenoid-based plumage. We measured circulating carotenoid concentrations in male and female hihi during breeding and molt, determined the nutritional content of common foods in the hihi diet, and conducted feeding observations of male and female hihi during molt. We found that although male and female hihi do not differ significantly in plasma carotenoid concentration, male hihi have a greater proportion of carotenoid-rich foods in their diet than do females. This is a consequence of a greater fruit and lower invertebrate intake than females and an avoidance of low-carotenoid content fruit. By combining behavioral observations with quantification of circulating carotenoids, we present evidence that colorful birds forage to maximize carotenoid intake, a conclusion we would not have drawn had we examined plasma carotenoids alone.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
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  • 9
    Publication Date: 2014-11-15
    Description: Parasitism of multiple host species by a generalist poses the difficulty of overcoming a potentially diverse array of host defenses. In some generalist avian obligate brood parasites, selection for egg mimicry by hosts has given rise to host-specific races (gentes), each of which lays an egg that mimics that of its favored host. However, it is unknown how generalist parasites lacking races are able to circumvent egg rejection by hosts. The Horsfield’s bronze-cuckoo, Chalcites basalis , is a generalist brood parasite that exploits a diversity of hosts yet is reported to lay monomorphic eggs. Using reflectance spectrometry and visual modeling, we tested for egg polymorphisms in Horsfield’s bronze-cuckoo eggs laid in the nests of 17 host species. We found that the host species possess broadly similar egg phenotypes that differ subtly but significantly from one another in their color and luminance. However, the Horsfield’s bronze-cuckoo does not mimic this diversity, thus ruling out the existence of host-specific egg color and luminance phenotypes that are visible to birds but hidden from humans. Instead, our analyses support the idea that the Horsfield’s bronze-cuckoo egg is a jack-of-all-trades mimic, lying in an intermediate position in avian visual space between the eggs of its various hosts. We suggest that jack-of-all-trades mimicry may be favored among brood parasites that parasitize hosts with a narrow range of egg phenotypes and where individual female brood parasites exploit multiple host species.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
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  • 10
    Publication Date: 2010-06-04
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
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