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  • 1
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    Male fertility and sex ratio at birth in red deer (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-12-02
    Description: Efforts to test sex ratio theory have focused mostly on females. However, when males possess traits that could enhance the reproductive success of sons, males would also benefit from the manipulation of the offspring sex ratio. We tested the prediction that more-fertile red deer males produce more sons. Our findings reveal that male fertility is positively related to the proportion of male offspring. We also show that there is a positive correlation between the percentage of morphologically normal spermatozoa (a main determinant of male fertility) and the proportion of male offspring. Thus, males may contribute significantly to biases in sex ratio at birth among mammals, creating the potential for conflicts of interest between males and females.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gomendio, Montserrat -- Malo, Aurelio F -- Soler, Ana J -- Fernandez-Santos, Maria R -- Esteso, Milagros C -- Garcia, Andres J -- Roldan, Eduardo R S -- Garde, Julian -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1445-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Reproductive Ecology and Biology Group, Department of Evolutionary Ecology, Museo Nacional de Ciencias Naturales [Consejo Superior de Investigaciones Cientificas (CSIC)], 28006-Madrid, Spain. montseg@mncn.csic.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17138900" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Deer/*physiology ; Female ; *Fertility ; Fertilization ; Male ; Reproduction ; *Sex Ratio ; Sperm Motility ; Spermatozoa/cytology ; X Chromosome ; Y Chromosome
    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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    Debating sexual selection and mating strategies (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pizzari, Tommaso -- Birkhead, Tim R -- Blows, Mark W -- Brooks, Rob -- Buchanan, Katherine L -- Clutton-Brock, Tim H -- Harvey, Paul H -- Hosken, Dave J -- Jennions, Michael D -- Kokko, Hanna -- Kotiaho, Janne S -- Lessells, C M -- Macias-Garcia, Constantino -- Moore, Allen J -- Parker, Geoff A -- Partigridge, Linda -- Pitnick, Scott -- Radwan, Jacek -- Ritchie, Mike -- Sheldon, Ben C -- Simmons, Leigh W -- Snook, Rhonda R -- Stockley, Paula -- Zuk, Marlene -- New York, N.Y. -- Science. 2006 May 5;312(5774):689-97; author reply 689-97.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16680817" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Female ; Male ; Reproduction ; Sex Characteristics ; *Sexual Behavior, Animal ; *Social Behavior
    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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    Reducing the racial achievement gap: a social-psychological intervention (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-09-02
    Description: Two randomized field experiments tested a social-psychological intervention designed to improve minority student performance and increase our understanding of how psychological threat mediates performance in chronically evaluative real-world environments. We expected that the risk of confirming a negative stereotype aimed at one's group could undermine academic performance in minority students by elevating their level of psychological threat. We tested whether such psychological threat could be lessened by having students reaffirm their sense of personal adequacy or "self-integrity." The intervention, a brief in-class writing assignment, significantly improved the grades of African American students and reduced the racial achievement gap by 40%. These results suggest that the racial achievement gap, a major social concern in the United States, could be ameliorated by the use of timely and targeted social-psychological interventions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, Geoffrey L -- Garcia, Julio -- Apfel, Nancy -- Master, Allison -- New York, N.Y. -- Science. 2006 Sep 1;313(5791):1307-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, University of Colorado, Muenzinger Psychology Building, Boulder, CO 80309-0345, USA. cohen.geoff@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16946074" target="_blank"〉PubMed〈/a〉
    Keywords: *Achievement ; Adolescent ; African Americans/*psychology ; Double-Blind Method ; Educational Measurement ; *Educational Status ; Female ; Humans ; Male ; Minority Groups/*psychology ; *Psychology, Social ; *Self Concept ; *Social Perception ; Social Values ; Stereotyping ; Stress, Psychological ; United States
    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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