Download or read book Sperm Competition in Humans written by Nicholas Pound and published by Taylor & Francis. This book was released on 2006 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the intricate ways in which sperm compete to fertilize eggs and how this has prompted reinterpretations of breeding behavior from a biological perspective. Sperm Competition in Humans: Classic and Contemporary Readings provides a theoretical framework for the study of sperm competition and also discusses the roles of females and the relationships between paternal care in sperm competition. The chapters focus on everything from evolutionary biology to taxonomic development.
Download or read book Post Darwinian questions Isolation and physiological selection written by George John Romanes and published by . This book was released on 1914 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Post Darwinian questions Isolation and physiological selection 1906 written by George John Romanes and published by . This book was released on 1906 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Darwin and After Darwin Post Darwinian questions Isolation and physiological selection written by George John Romanes and published by . This book was released on 1897 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Darwin and After Darwin Post Darwinian questions Isolation and physiological selection 1897 written by George John Romanes and published by . This book was released on 1897 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiological Adaptations for Breeding in Birds written by Tony D. Williams and published by Princeton University Press. This book was released on 2012-08-05 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiological Adaptations for Breeding in Birds is the most current and comprehensive account of research on avian reproduction. It develops two unique themes: the consideration of female avian reproductive physiology and ecology, and an emphasis on individual variation in life-history traits. Tony Williams investigates the physiological, metabolic, energetic, and hormonal mechanisms that underpin individual variation in the key female-specific reproductive traits and the trade-offs between these traits that determine variation in fitness. The core of the book deals with the avian reproductive cycle, from seasonal gonadal development, through egg laying and incubation, to chick rearing. Reproduction is considered in the context of the annual cycle and through an individual's entire life history. The book focuses on timing of breeding, clutch size, egg size and egg quality, and parental care. It also provides a primer on female reproductive physiology and considers trade-offs and carryover effects between reproduction and other life-history stages. In each chapter, Williams describes individual variation in the trait of interest and the evolutionary context for trait variation. He argues that there is only a rudimentary, and in some cases nonexistent, understanding of the physiological mechanisms that underpin individual variation in the major reproductive life-history traits, and that research efforts should refocus on these key unresolved problems by incorporating detailed physiological studies into existing long-term population studies, generating a new synthesis of physiology, ecology, and evolutionary biology.
Download or read book Adaptation and Natural Selection written by George Christopher Williams and published by Princeton University Press. This book was released on 2018-10-30 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological evolution is a fact—but the many conflicting theories of evolution remain controversial even today. When Adaptation and Natural Selection was first published in 1966, it struck a powerful blow against those who argued for the concept of group selection—the idea that evolution acts to select entire species rather than individuals. Williams’s famous work in favor of simple Darwinism over group selection has become a classic of science literature, valued for its thorough and convincing argument and its relevance to many fields outside of biology. Now with a new foreword by Richard Dawkins, Adaptation and Natural Selection is an essential text for understanding the nature of scientific debate.
Download or read book Symposium Physical Standards and Selection written by USAF School of Aviation Medicine and published by . This book was released on 1957 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sex Differences in Physiology written by Gretchen Neigh and published by Academic Press. This book was released on 2016-05-10 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sex Differences in Physiology is an all-encompassing reference that details basic science research into sex differences in all physiological fields. It includes scientific discoveries concerning sex differences in cardiovascular, respiratory, renal, gastrointestinal, and musculoskeletal physiology. In addition, coverage of the development, endocrinology, neurophysiology, immunity, and metabolism is included, making this important reference a resource that will meet the needs of investigators interested in incorporating sex differences into their research programs, while also providing clinicians with the basis for providing the best sex-based medical treatment options available. Provides a sweeping, organ-by-organ review of currently observed sex differences in animal models and human disease Explains how sex differences influence physiology and disease Provides the critical knowledge on sex differences for better understanding of prevention and treatment of diseases
Download or read book Psychological Testing in the Service of Disability Determination written by Institute of Medicine and published by National Academies Press. This book was released on 2015-06-29 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Social Security Administration (SSA) administers two disability programs: Social Security Disability Insurance (SSDI), for disabled individuals, and their dependent family members, who have worked and contributed to the Social Security trust funds, and Supplemental Security Income (SSSI), which is a means-tested program based on income and financial assets for adults aged 65 years or older and disabled adults and children. Both programs require that claimants have a disability and meet specific medical criteria in order to qualify for benefits. SSA establishes the presence of a medically-determined impairment in individuals with mental disorders other than intellectual disability through the use of standard diagnostic criteria, which include symptoms and signs. These impairments are established largely on reports of signs and symptoms of impairment and functional limitation. Psychological Testing in the Service of Disability Determination considers the use of psychological tests in evaluating disability claims submitted to the SSA. This report critically reviews selected psychological tests, including symptom validity tests, that could contribute to SSA disability determinations. The report discusses the possible uses of such tests and their contribution to disability determinations. Psychological Testing in the Service of Disability Determination discusses testing norms, qualifications for administration of tests, administration of tests, and reporting results. The recommendations of this report will help SSA improve the consistency and accuracy of disability determination in certain cases.
Download or read book Aestivation written by Carlos Arturo Navas and published by Springer Science & Business Media. This book was released on 2010-01-12 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous animal species live in environments characterized by a seasonal reduction in the availability of water, which often but not always occurs when temperatures are highest. For many such animals, survival during the toughest season requires spending long periods of time in a rather inactive state known as aestivation. But aestivation is much more than remaining inactive. Successful aestivation requires the selection of a proper microhabitat, variable degrees of metabolic arrest and responsiveness to external stimuli, the ability to sense the proper time of year for emergence, the preservation of inactive tissue, and much more. So, aestivation involves a complex collection of behaviors, ecological associations and physiological adjustments that vary across species in their type, magnitude and course. This book seeks to explore the phenomenon of aestivation from different perspectives and levels of organization, ranging from microhabitat selection to genetic control of physiological adjustments. It brings together authors from across the world working on different systematic groups, approaches, and questions, but who are all ultimately working to better understand the complex issue of aestivation.
Download or read book Using Canopy Temperature Depression to Select for Yield Potential of Wheat in Heat stressed Environments written by and published by CIMMYT. This book was released on 1997 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nature written by Sir Norman Lockyer and published by . This book was released on 1899 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Darwin and After Darwin written by George John Romanes and published by . This book was released on 1897 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Darwin After Darwin written by G. J. Romanes and published by . This book was released on 1906 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Zoological Journal of the Linnean Society written by Linnean Society of London and published by . This book was released on 1886 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Linnean Society written by Linnean Society of London and published by . This book was released on 1890 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
