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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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    New neurons follow the flow of cerebrospinal fluid in the adult brain (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-01-18
    Description: In the adult brain, neuroblasts born in the subventricular zone migrate from the walls of the lateral ventricles to the olfactory bulb. How do these cells orient over such a long distance and through complex territories? Here we show that neuroblast migration parallels cerebrospinal fluid (CSF) flow. Beating of ependymal cilia is required for normal CSF flow, concentration gradient formation of CSF guidance molecules, and directional migration of neuroblasts. Results suggest that polarized epithelial cells contribute important vectorial information for guidance of young, migrating neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sawamoto, Kazunobu -- Wichterle, Hynek -- Gonzalez-Perez, Oscar -- Cholfin, Jeremy A -- Yamada, Masayuki -- Spassky, Nathalie -- Murcia, Noel S -- Garcia-Verdugo, Jose Manuel -- Marin, Oscar -- Rubenstein, John L R -- Tessier-Lavigne, Marc -- Okano, Hideyuki -- Alvarez-Buylla, Arturo -- HD 32116/HD/NICHD NIH HHS/ -- NS 28478/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2006 Feb 3;311(5761):629-32. Epub 2006 Jan 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurological Surgery and Developmental and Stem Cell Biology Program, University of California San Francisco, San Francisco, CA 94143, USA. sawamoto@sc.itc.keio.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16410488" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Tissue Transplantation ; Cell Movement ; Cell Polarity ; Cerebral Ventricles/cytology/physiology ; Cerebrospinal Fluid/*physiology ; Choroid Plexus/secretion ; Cilia/physiology ; Ependyma/cytology/*physiology ; Epithelial Cells/physiology ; Intercellular Signaling Peptides and Proteins ; Mice ; Nerve Tissue Proteins/cerebrospinal fluid ; Neurons/cytology/*physiology ; Olfactory Bulb/cytology/physiology ; Recombinant Fusion Proteins/cerebrospinal fluid
    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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    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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  • 4
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    Profile: Thomas Kaplan. From making a killing to saving a species (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-09-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garcia, Diane -- Stokstad, Erik -- New York, N.Y. -- Science. 2006 Sep 1;313(5791):1226-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16946047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Conservation of Natural Resources/*economics/history ; *Felidae ; Fellowships and Scholarships ; *Fund Raising ; History, 20th Century ; History, 21st Century ; Research Support as Topic ; 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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  • 5
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    Type 1 interferons and the virus-host relationship: a lesson in detente (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-05-13
    Description: The interface between an infectious agent and its host represents the ultimate battleground for survival: The microbe must secure a niche for replication, whereas the host must limit the pathogen's advance. Among the host's arsenal of antimicrobial factors, the type 1 interferons (IFNs) induce potent defense mechanisms against viruses and are key in the host-virus standoff. Viruses have evolved multiple tricks to avoid the immediate antiviral effects of IFNs and, in turn, hosts have adapted use of this innate cytokine system to galvanize multiple additional layers of immune defense. The plasticity that exists in these interactions provides us with a lesson in detente.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garcia-Sastre, Adolfo -- Biron, Christine A -- P01AI52106/AI/NIAID NIH HHS/ -- P01AI58113/AI/NIAID NIH HHS/ -- R01AI46954/AI/NIAID NIH HHS/ -- R01AI55677/AI/NIAID NIH HHS/ -- R01CA41268/CA/NCI NIH HHS/ -- U19AI62623/AI/NIAID NIH HHS/ -- U54AI57158/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2006 May 12;312(5775):879-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690858" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytokines/physiology ; *Immunity, Innate ; Interferon Regulatory Factors/physiology ; Interferon Type I/biosynthesis/genetics/*physiology ; Models, Biological ; RNA Helicases/metabolism ; Signal Transduction ; Toll-Like Receptors/physiology ; Viral Proteins/metabolism ; *Virus Physiological Phenomena ; Viruses/*immunology
    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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  • 6
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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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