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  • 1
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    Genetic incompatibility drives sex allocation and maternal investment in a polymorphic finch (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-03-21
    Description: Genetic compatibility may drive individual mate choice decisions because of predictable fitness effects associated with breeding with incompatible partners. In Gouldian finches (Erythrura gouldiae), females paired with genetically incompatible males of alternative color morphs overproduce sons, presumably to reduce investment in inviable daughters. We also observed a reduced overall investment in clutch size, egg size, and care to offspring resulting from incompatible matings. Within-female experimental pairings demonstrate that female birds have the ability to adaptively adjust the sex of their eggs and allocate resources on the basis of partner quality. Female Gouldian finches thus make cumulative strategic allocation decisions to minimize the costs of poor-quality pairings when faced with a genetically incompatible partner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pryke, Sarah R -- Griffith, Simon C -- New York, N.Y. -- Science. 2009 Mar 20;323(5921):1605-7. doi: 10.1126/science.1168928.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Brain, Behaviour, and Evolution, Macquarie University, Sydney, NSW 2109, Australia. sarah.pryke@mq.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19299618" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breeding ; Clutch Size ; Female ; Finches/*genetics/*physiology ; Male ; Maternal Behavior ; *Mating Preference, Animal ; *Nesting Behavior ; Oviposition ; Ovum/physiology ; Pigmentation/genetics ; *Reproduction ; Sex Characteristics ; *Sex Ratio
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Females use multiple mating and genetically loaded sperm competition to target compatible genes (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-21
    Description: Individuals in socially monogamous species may participate in copulations outside of the pair bond, resulting in extra-pair offspring. Although males benefit from such extra-pair behavior if they produce more offspring, the adaptive function of infidelity to females remains elusive. Here we show that female participation in extra-pair copulations, combined with a genetically loaded process of sperm competition, enables female finches to target genes that are optimally compatible with their own to ensure fertility and optimize offspring viability. Such female behavior, along with the postcopulatory processes demonstrated here, may provide an adaptive function of female infidelity in socially monogamous animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pryke, Sarah R -- Rollins, Lee A -- Griffith, Simon C -- New York, N.Y. -- Science. 2010 Aug 20;329(5994):964-7. doi: 10.1126/science.1192407.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20724639" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Biological ; Animals ; Female ; Fertilization/genetics ; Finches/genetics/*physiology ; Genes ; Male ; *Mating Preference, Animal ; *Pair Bond ; Selection, Genetic ; Spermatozoa/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Stable recombination hotspots in birds (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-11-21
    Description: The DNA-binding protein PRDM9 has a critical role in specifying meiotic recombination hotspots in mice and apes, but it appears to be absent from other vertebrate species, including birds. To study the evolution and determinants of recombination in species lacking the gene that encodes PRDM9, we inferred fine-scale genetic maps from population resequencing data for two bird species: the zebra finch, Taeniopygia guttata, and the long-tailed finch, Poephila acuticauda. We found that both species have recombination hotspots, which are enriched near functional genomic elements. Unlike in mice and apes, most hotspots are shared between the two species, and their conservation seems to extend over tens of millions of years. These observations suggest that in the absence of PRDM9, recombination targets functional features that both enable access to the genome and constrain its evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Singhal, Sonal -- Leffler, Ellen M -- Sannareddy, Keerthi -- Turner, Isaac -- Venn, Oliver -- Hooper, Daniel M -- Strand, Alva I -- Li, Qiye -- Raney, Brian -- Balakrishnan, Christopher N -- Griffith, Simon C -- McVean, Gil -- Przeworski, Molly -- 086786/Z/08/Z/Wellcome Trust/United Kingdom -- 090532/Z/09/Z/Wellcome Trust/United Kingdom -- 100956/Wellcome Trust/United Kingdom -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Nov 20;350(6263):928-32. doi: 10.1126/science.aad0843.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, NY 10027, USA. Department of Systems Biology, Columbia University, New York, NY 10032, USA. sonal.singhal1@gmail.com molly.przew@gmail.com. ; Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK. ; Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA. ; Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK. ; Committee on Evolutionary Biology, University of Chicago, Chicago, IL 60637, USA. ; Department of Biological Sciences, Columbia University, New York, NY 10027, USA. ; China National Genebank, BGI-Shenzhen, Shenzhen 518083, China. ; Center for Biomolecular Science and Engineering, University of California-Santa Cruz, Santa Cruz, CA 95064, USA. ; Department of Biology, East Carolina University, Greenville, NC 27858, USA. ; Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26586757" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; *Evolution, Molecular ; Finches/*genetics ; *Gene Expression Regulation ; Genome ; *Recombination, Genetic ; Repressor Proteins/*genetics ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Peak intervals of equatorial Pacific export production during the middle Miocene climate transition (2016)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2016-10-19
    Description: The middle Miocene climate transition (MMCT) is characterized by an abrupt 1 increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth’s climate to a cooler, relatively stable glacial state. Also occurring during this period is a globally recognized positive carbon isotope excursion (16.9–13.5 Ma) in benthic and planktonic foraminifera with shorter carbon isotope maxima (CM) events, linking hypotheses for climate change at the time with the carbon cycle. In order to test whether export production in the eastern equatorial Pacific is related to the largest such event (CM6), coincident with Antarctic Ice Sheet expansion, a high-resolution (〈5 k.y.) record of export production at Integrated Ocean Drilling Program Site U1337 spanning the MMCT (14.02–13.43 Ma) was produced using marine pelagic barite mass accumulation rates. Export production is elevated with an extended period of more than double present-day values. These variations are not orbitally paced and provide evidence for a reorganization of nutrients supplied to the eastern equatorial Pacific in the Miocene and intensification of upwelling. If such changes are representative of the entire region, then this mechanism could sequester enough carbon to have a significant effect on atmospheric p CO 2 . However, continual delivery of nutrients to the surface waters of the eastern equatorial Pacific is required in order to sustain export production without depleting the surface ocean of limiting nutrients. This might be accomplished by a change in ocean circulation or a combination of other processes requiring further study.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 5
    Electronic Resource
    Electronic Resource
    Sexual dimorphism in house sparrow eggs (2000)
    Springer
    Behavioral ecology and sociobiology 48 (2000), S. 353-357 
    Details
    ISSN: 1432-0762
    Keywords: Key words Egg size ; Parental investment ; Passer domesticus ; Sex ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Recent evidence has revealed an apparently high degree of control by female birds over the physiological aspects of their reproduction and offspring sex allocation, consistent with adaptive hypotheses of sex allocation and differential investment in their offspring. In the house sparrow, we investigated possible mechanisms that may be used by females to enhance the fitness returns from a reproductive effort. Using molecular techniques, we demonstrate that house sparrow eggs containing male embryos are significantly larger than those containing female embryos. We also found that male embryos were laid randomly with respect to laying order. We speculate that this sexual dimorphism of eggs is adaptive, because male house sparrows show greater variance in condition-dependent reproductive success than females. More important, the result provides further evidence of the ability of females to detect or control ovulation of either male or female ova and to differentially invest in one sex over the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650000252
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    Paper (German National Licenses)
    Fulltext
  • 6
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    Personality in the wild zebra finch: exploration, sociality, and reproduction (2015)
    Oxford University Press
    Details
    Publication Date: 2015-05-16
    Description: Although personality has been well studied in a wide range of species, relatively few studies have assessed if behavior in standardized captive tests is predictive of behavior in the wild. We captured wild zebra finches around 2 breeding colonies and assayed their exploratory behavior with a novel environment test. The birds’ foraging behavior in the wild was also measured with the use of a passive integrated transponder tag system to monitor their use of feeders that were periodically moved around the colonies to assess exploratory behavior and sociality. During the same period, individuals’ reproductive success was monitored at the nest-boxes being used in this area. We found that our measures of sociality, wild, and captive exploration were repeatable, but contrary to our predictions, exploration in the novel environment test was not significantly correlated with exploration of feeders in the wild. We failed to find a predicted negative relationship between exploration and sociality, instead finding a significant positive correlation between exploration in the novel environment and sociality. Finally, we found little evidence that any of our measured personality traits influenced reproductive success at the colony, either individually or when the interactions between the personalities of both members of the pair were taken into account. The only exception was that highly exploratory males (assayed with wild feeder behavior) were more likely to make breeding attempts than less exploratory males. Our results suggest that researchers should use caution when using tests such as the classic novel environment test to make inferences about personality in wild populations.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 7
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    Within-group vocal differentiation of individuals in the cooperatively breeding apostlebird (2015)
    Oxford University Press
    Details
    Publication Date: 2015-03-27
    Description: The ability of animals to discriminate between individuals or groups of individuals (e.g., kin or nonkin) is an important component of many hypotheses proposed to explain the evolution of cooperation and benefits of group living. Previous studies in mammalian systems have demonstrated the use of vocal cues in individual recognition and discrimination. However, there are few such studies in birds. Previous avian studies have largely examined discrimination between different categories of individuals (e.g., mate vs. nonmate, offspring vs. non-offspring) while discrimination between individuals of the same category remain largely unexplored. Previous work has demonstrated that the contact calls of free-living apostlebirds ( Struthidea cinerea ) are individually distinct. Here, we demonstrate that apostlebirds can differentiate between the calls of other individuals of the same social group using vocal cues alone. These findings are biologically relevant as apostlebirds live in complex fission–fusion societies where social groups vary in size, sex ratio, number of breeders, and composition of related and unrelated members.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 8
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    Experimental analysis of sperm competition mechanisms in a wild bird population (2002)
    National Academy of Sciences
    Details
    Publication Date: 2002-04-09
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Genetic similarity is broadly associated with genetic polyandry in birds: a comment on Arct et al. (2015)
    Oxford University Press
    Details
    Publication Date: 2015-07-09
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 10
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    Unrelated helpers neither signal contributions nor suffer retribution in chestnut-crowed babblers (2015)
    Oxford University Press
    Details
    Publication Date: 2015-07-09
    Description: Alloparental care by distant/nonkin that accrue few kin-selected benefits requires direct fitness benefits to evolve. The pay-to-stay hypothesis, under which helpers contribute to alloparental care to avoid being expelled from the group by dominant individuals, offers one such explanation. Here, we investigated 2 key predictions derived from the pay-to-stay hypothesis using the chestnut-crowed babbler, Pomatostomus ruficeps , a cooperatively breeding bird where helping by distant/nonkin is common (18% of nonbreeding helpers). First, we found no indication that distant or nonkin male helpers advertised their contributions toward the primary male breeder. Helpers unrelated to both breeders were unresponsive to provisioning rates of the dominant male, whereas helpers that were related to either the breeding male or to both members of the pair were responsive. In addition, unrelated male helpers did not advertise their contributions to provisioning by disproportionately synchronizing their provisioning events with those of the primary male breeder or by provisioning nestlings immediately after him. Second, no helper, irrespective of its relatedness to the dominant breeders, received aggression when released back into the group following temporary removal for 1–2 days. We therefore find no compelling support for the hypothesis that pay-to-stay mechanisms account for the cooperative behavior of unrelated males in chestnut-crowned babblers.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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