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Influence Of Season And Acth On Corticosterone In Female Eastern Fence Lizards Sceloporus Undulatus
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Book Synopsis Influence of Season and ACTH on Corticosterone in Female Eastern Fence Lizards (Sceloporus Undulatus) by : Julie Baker Phillips
Download or read book Influence of Season and ACTH on Corticosterone in Female Eastern Fence Lizards (Sceloporus Undulatus) written by Julie Baker Phillips and published by . This book was released on 2006 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Exogenous Corticosterone and Testosterone on Juvenile Eastern Fence Lizards, Sceloporus Undulatus by : Courtney Marie Norjen
Download or read book The Effects of Exogenous Corticosterone and Testosterone on Juvenile Eastern Fence Lizards, Sceloporus Undulatus written by Courtney Marie Norjen and published by . This book was released on 2014 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Corticosterone on Behavior in Sceloporus Undulatus by : Whitney Paige Trompeter
Download or read book The Effect of Corticosterone on Behavior in Sceloporus Undulatus written by Whitney Paige Trompeter and published by . This book was released on 2010 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Levels of the stress hormone, corticosterone (CORT) in the blood can be a great indicator of stress levels in lizards. This approach reveals that invasive species impose novel pressure on natives, elevating stress levels. Native species often behaviorally adapt to these pressures in order to increase their chances of surviving exposure to these nonnative threats. We tested the hypothesis that eastern fence lizards (Sceloporus undulatus) that have been exposed to predatory invasive fire ants (Solenopsis invicta) for several generations exhibit different behavioral responses to experimentally elevated CORT than do lizards whose habitat has not yet been invaded. Lizards from the uninvaded site respond to elevated CORT levels by hiding more and moving and basking less, whereas those from the invaded site exhibit the opposite pattern; hiding less, moving more, and spend more time on the basking log when CORT levels are elevated. These differences in response may facilitate survival in these different environments. Within natural uninvaded populations, lizards would benefit from becoming less active and hiding in response to a stressful event, as this would reduce their vulnerability to predators and conspecifics. In contrast, within fire ant invaded sites, increased CORT levels occur following encounters with fire ants. Responding to elevated CORT levels by moving away and off the ground would increase the lizards' chances of surviving these encounters in the presence of this invader. The changes in basking behavior following elevated CORT levels appears to be due to changes in the propensity of lizards escaping up off the ground rather than having any thermoregulatory relevance. A second study revealed that lizards body temperatures were not affected by experimentally elevated CORT levels, and this response did not differ between fire ant invaded and uninvaded sites. Together, these reveal that the behavioral response to physiological stress can be altered by the introduction of non-native species, allowing native species to persist in the face of this novel threat.
Book Synopsis Hormones and Reproduction of Vertebrates by : David O. Norris
Download or read book Hormones and Reproduction of Vertebrates written by David O. Norris and published by Academic Press. This book was released on 2010-11-25 with total page 1681 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series of volumes represents a comprehensive and integrated treatment of reproduction in vertebrates from fishes of all sorts through mammals. It is designed to provide a readable, coordinated description of reproductive basics in each group of vertebrates as well as an introduction to the latest trends in reproductive research and our understanding of reproductive events. Whereas each chapter and each volume is intended to stand alone as a review of that topic or vertebrate group, respectively, the volumes are prepared so as to provide a thorough topical treatment across the vertebrates. Terminology has been standardized across the volumes to reduce confusion where multiple names exist in the literature, and a comprehensive glossary of these terms and their alternative names is provided. A complete, essential and up to date reference for research scientists working on vertebrate hormones and reproduction - and on animlals as models in human reproductive research Covers the endocrinology, neuroendocrinology, physiology, behaviour and anatomy of vertebrate reproduction Structured coverage of the major themes for all five vertebrate groups allows a consistent treatment for all Special chapters elaborate on features specific to individual vertebrate groups and to comparative aspects, similarities and differences between them
Book Synopsis Hormones and Reproduction of Vertebrates, Volume 3 by : David Norris
Download or read book Hormones and Reproduction of Vertebrates, Volume 3 written by David Norris and published by Academic Press. This book was released on 2011-05-04 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series of volumes represents a comprehensive and integrated treatment of reproduction in vertebrates from fishes of all sorts through mammals. It is designed to provide a readable, coordinated description of reproductive basics in each group of vertebrates as well as an introduction to the latest trends in reproductive research and our understanding of reproductive events. Whereas each chapter and each volume is intended to stand alone as a review of that topic or vertebrate group, respectively, the volumes are prepared so as to provide a thorough topical treatment across the vertebrates. Terminology has been standardized across the volumes to reduce confusion where multiple names exist in the literature, and a comprehensive glossary of these terms and their alternative names is provided. A complete, essential and up to date reference for research scientists working on vertebrate hormones and reproduction - and on animlals as models in human reproductive research Covers the endocrinology, neuroendocrinology, physiology, behaviour and anatomy of vertebrate reproduction Structured coverage of the major themes for all five vertebrate groups allows a consistent treatment for all Special chapters elaborate on features specific to individual vertebrate groups and to comparative aspects, similarities and differences between them
Book Synopsis Effects of Maternal Stress on Performance Behavior of Lizard Offspring by : Jennifer Heppner
Download or read book Effects of Maternal Stress on Performance Behavior of Lizard Offspring written by Jennifer Heppner and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal functioning of the hypothalamic-pituitary-adrenal (HPA) axis, and resulting production of glucocorticoids (GCs), can significantly impact how individuals cope with environmental challenges. Elevation in maternal GCs, including corticosterone (CORT), impact offspring phenotype, performance, and fitness. While many of these programed developmental changes in offspring phenotype have been perceived as negative, it is hypothesized that these maternal GCs may be plastically enacting an adaptive response in offspring phenotype that can increase fitness. However, little is known of how this maternally-derived stress (MDS) adaptively effects offspring phenotype and prepares offspring to better survive in their post-natal environments. In order to investigate the adaptive potential of maternal stress, we first must quantify effects on fitness-relevant traits. I tested the hypothesis that maternal stress will alter fitness-relevant behavior of offspring expressed early in life. I manipulated CORT of gravid female Eastern Fence Lizards (Sceloporus undulatus) by dosing them daily with ecologically-relevant concentrations of CORT, to mimic those resulting from attack by fire ants (Solenopsis invicta). I measured righting ability and sprint speed of the resulting offspring soon after hatching and found no effect of maternal CORT on these performance behaviors. In contrast to previous results of elevated maternal CORT having outcomes on offspring, our results do not show an effect of maternal GCs on offspring phenotype. Future studies should examine the plastic potential of maternal CORT on other offspring phenotypes to discover the full effects of maternal stress on offspring fitness.
Book Synopsis 11-Hydroxycorticosteroids—Advances in Research and Application: 2012 Edition by :
Download or read book 11-Hydroxycorticosteroids—Advances in Research and Application: 2012 Edition written by and published by ScholarlyEditions. This book was released on 2012-12-26 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: 11-Hydroxycorticosteroids—Advances in Research and Application: 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about 11-Hydroxycorticosteroids. The editors have built 11-Hydroxycorticosteroids—Advances in Research and Application: 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about 11-Hydroxycorticosteroids in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of 11-Hydroxycorticosteroids—Advances in Research and Application: 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Book Synopsis The Effects of Temperature and Slope on the Endurance and Sprint Speed of the Eastern Fence Lizard, Sceloporus Undulatus by : Frederick Clifford Pinch
Download or read book The Effects of Temperature and Slope on the Endurance and Sprint Speed of the Eastern Fence Lizard, Sceloporus Undulatus written by Frederick Clifford Pinch and published by . This book was released on 2001 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measuring the Effects of Temperature and Nutritional Status on Metabolic Rates of Eastern Fence Lizards (Sceloporus Undulatus) by : Julianne Therese Zannoni
Download or read book Measuring the Effects of Temperature and Nutritional Status on Metabolic Rates of Eastern Fence Lizards (Sceloporus Undulatus) written by Julianne Therese Zannoni and published by . This book was released on 1997 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vertebrate Endocrinology by : David O. Norris
Download or read book Vertebrate Endocrinology written by David O. Norris and published by Academic Press. This book was released on 2013-05-04 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vertebrate Endocrinology represents more than just a treatment of the endocrine system-it integrates hormones with other chemical bioregulatory agents not classically included with the endocrine system. It provides a complete overview of the endocrine system of vertebrates by first emphasizing the mammalian system as the basis of most terminology and understanding of endocrine mechanisms and then applies that to non-mammals. The serious reader will gain both an understanding of the intricate relationships among all of the body systems and their regulation by hormones and other bioregulators, but also a sense of their development through evolutionary time as well as the roles of hormones at different stages of an animal's life cycle. Includes new full color format includes over 450 full color, completely redrawn image Features a companion web site hosting all images from the book as PPT slides and .jpeg files Presents completedly updated and revitalized content with new chapters, such as Endocrine Disrupters and Behavioral Endocrinology Offers new clinical correlation vignettes throughout
Book Synopsis Variation in Endurance in the Fence Lizard, Sceloporus Undulatus by : Brian J. Cusack
Download or read book Variation in Endurance in the Fence Lizard, Sceloporus Undulatus written by Brian J. Cusack and published by . This book was released on 2000 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Seasonal Testosterone and Sexual Dimorphism on Locomotor Performance Variation in the Eastern Fence Lizard (Sceloporus Undulatus) by : Mindy L. Murdock
Download or read book Effects of Seasonal Testosterone and Sexual Dimorphism on Locomotor Performance Variation in the Eastern Fence Lizard (Sceloporus Undulatus) written by Mindy L. Murdock and published by . This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Sampling Effort on Home Range Estimates by : Andrew Keller
Download or read book The Influence of Sampling Effort on Home Range Estimates written by Andrew Keller and published by . This book was released on 2006 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The biology of the eastern fence lizard, Sceloporus undulatus hyacinthinus by : Joseph Patrick Kennedy
Download or read book The biology of the eastern fence lizard, Sceloporus undulatus hyacinthinus written by Joseph Patrick Kennedy and published by . This book was released on 1958 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Androgens and Ectoparasites as Proximate Factors Influencing Growth in the Sexually Dimorphic Lizard, Sceloporus Undulatus by : Nicholas Pollock
Download or read book Androgens and Ectoparasites as Proximate Factors Influencing Growth in the Sexually Dimorphic Lizard, Sceloporus Undulatus written by Nicholas Pollock and published by . This book was released on 2016 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: A growing body of evidence indicates that testosterone (T) plays an important role in regulating patterns of growth in lizards. Testosterone has also been found to facilitate the development of male-typical coloration and a suite of male behaviors that increase reproductive success. However, while T promotes male fitness through these characteristics, it appears to hinder fitness through direct molecular inhibition of growth and through indirect potential costs associated with increased parasitism. The relationship between T and ectoparasitism is complicated by seasonal variation in host circulating T levels and ectoparasite life cycles. It is unclear whether sex differences in ectoparasite loads are present year-round, are present only when circulating T is high in males, or are present only when ectoparasite abundances are high. Furthermore, it is often assumed that because ectoparasites feed by taking nutrients and energy from their hosts, then ectoparasites likely impact host growth. Effects of ectoparasitism on host growth may be particularly high in males if they have greater ectoparasite loads than females. This could indirectly lead to slower male growth and smaller overall male body size. To address the lack of information regarding direct and indirect effects of T on growth, seasonal variation in sex- biased ectoparasite loads, and of the relationship between ectoparasitism and growth, I investigated (1) whether growth inhibition in eastern fence lizards (Sceloporus undulatus) is regulated through androgen or estrogen receptors, (2) seasonal correlations of mite loads with environmental mite abundances, and (3) whether sex differences in growth are correlated with sex differences in mite loads. I found that DHT inhibits male growth in S. undulatus, suggesting that T inhibits growth through direct androgenic molecular regulation. Furthermore, as indicated by the negative correlation between male growth and mite load, I found that T may also inhibit growth in males indirectly through costs associated with increased mite parasitism. Mite loads on S. undulatus varied seasonally, with peak mite loads occurring during months of high environmental mite abundance, coincident with seasonally high circulating T in yearling males and negatively correlated with male growth. This suggests that mites may impose a cost to growth in S. undulatus and contribute to male growth-inhibition, sex-specific growth rates, and the development of sexual size dimorphism (SSD).
Book Synopsis Journal of Comparative Physiology by :
Download or read book Journal of Comparative Physiology written by and published by . This book was released on 2004 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Escaping From Predators by : William E. Cooper, Jr
Download or read book Escaping From Predators written by William E. Cooper, Jr and published by Cambridge University Press. This book was released on 2015-05-28 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a predator attacks, prey are faced with a series of 'if', 'when' and 'how' escape decisions – these critical questions are the foci of this book. Cooper and Blumstein bring together a balance of theory and empirical research to summarise over fifty years of scattered research and benchmark current thinking in the rapidly expanding literature on the behavioural ecology of escaping. The book consolidates current and new behaviour models with taxonomically divided empirical chapters that demonstrate the application of escape theory to different groups. The chapters integrate behaviour with physiology, genetics and evolution to lead the reader through the complex decisions faced by prey during a predator attack, examining how these decisions interact with life history and individual variation. The chapter on best practice field methodology and the ideas for future research presented throughout, ensure this volume is practical as well as informative.
