Hormone Physiology And Life History Of Spotted Hyaenas Crocuta Crocuta
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Hormone Physiology And Life History Of Spotted Hyaenas Crocuta Crocuta
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Author : Wolfgang Goymann
language : en
Publisher:
Release Date : 1999
Hormone Physiology And Life History Of Spotted Hyaenas Crocuta Crocuta written by Wolfgang Goymann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Androgen And Serotonin Concentrations In Spotted Hyenas Crocuta Crocuta
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Author : Sarah Christine Jones
language : en
Publisher:
Release Date : 2019
Androgen And Serotonin Concentrations In Spotted Hyenas Crocuta Crocuta written by Sarah Christine Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic dissertations categories.
Animals display a wide range of social behaviors, including social behaviors such as aggression, mating, and parental care. An individual's ability to express the 'right' behavior in the appropriate context is vital to its success. For instance, individuals should engage in mating behavior during the appropriate life history stage (i.e. age, season) and avoid it in inappropriate contexts, such as in the presence of a predator. Neuroendocrine systems are key in allowing individuals to match their behavior to their current situation, as these systems affect behavior and are also responsive to changes in the environment and in an organism's internal state.Serotonin, a neuromodulator, and androgenic sex steroid hormones are key regulators of aggression and appear to play a central role in matching an organism's aggressive behavior to its social environment. For instance, in many social species living in dominance hierarchies, an individual's social status affects concentrations of serotonin and androgens. Serotonin is a known inhibitor of aggression, whereas androgens often facilitate the expression of aggression; accordingly, social dominance is often negatively correlated with serotonin concentrations and positively correlated with androgens. Still, these patterns are not universal, varying with sex, species, life history stage, and social context.Here, I examined the physiological, demographic, and environmental correlates of serotonin and androgens in a despotic, female-dominant species-the spotted hyena. Specifically, I focused on the relationship between social rank and serotonin/androgens, and its modulators. I first examined predictors of two androgens, testosterone (T) and androstenedione (A4), in pregnant female hyenas. I found a positive relationship between both androgens and social rank. However, this relationship was specific to pregnant females who had previously given birth (multiparous), apparently due to an increase in maternal androgens in high-ranking but not low-ranking females after the birth of their first litter.I then examined the relationship between T and social status in adult females across different reproductive states and social contexts, I found a positive correlation between T and social status in lactating and pregnant females, but not in nulliparous females; again, this pattern appeared to be driven by an increase in high-ranking female T concentrations associated with their first breeding experience. In a comparison of T concentrations in lactating females during periods of relative social stability and instability, I found that T concentrations in low- but not high- ranking females increased during periods of social instability, resulting in the disappearance of the usual positive correlation between social rank and T.Finally, I examined predictors of serotonin concentrations in both male and female hyenas across ontogeny. Serotonin was negatively correlated with social rank in female but not male spotted hyenas. Furthermore, social status at birth was particularly predictive of serotonin, as opposed to social status at the time of physiological sampling, indicating early life social environment may have lifelong effects on serotonergic function.Overall, I found that social status was an important predictor of androgen and serotonin concentrations, but that this relationship was dependent upon characteristics of the individual (e.g. sex, life history stage) and their social environment.
Advances In The Study Of Behavior
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Author :
language : en
Publisher: Elsevier
Release Date : 2002-01-21
Advances In The Study Of Behavior written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-21 with Psychology categories.
The aim of Advances in the Study of Behavior remains as it has been since the series began: to serve the increasing number of scientists who are engaged in the study of animal behavior by presenting their theoretical ideas and research to their colleagues and to those in neighboring fields. We hope that the series will continue its "contribution to the development of the field", as its intended role was phrased in the Preface to the first volume in 1965. Since that time, traditional areas of animal behavior have achieved new vigor by the links they have formed with related fields and by the closer relationship that now exists between those studying animal and human subjects.Advances in the Study of Behavior, Volume 31 continues to serve scientists across a wide spectrum of disciplines. Focusing on new theories and research developments with respect to behavioral ecology, evolutionary biology, and comparative psychology, these volumes foster cooperation and communications in these dense fields.
Socioendocrinology Of Spotted Hyenas
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Author : Stephanie Marie Dloniak
language : en
Publisher:
Release Date : 2004
Socioendocrinology Of Spotted Hyenas written by Stephanie Marie Dloniak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Androgens categories.
Biographical History Of Behavioral Neuroendocrinology
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Author : Randy J. Nelson
language : en
Publisher: Springer Nature
Release Date : 2022-11-29
Biographical History Of Behavioral Neuroendocrinology written by Randy J. Nelson and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-29 with Medical categories.
Behavioral neuroendocrinologists are interested in the interactions between hormones and behaviors. This unique book tracks the development of behavioral neuroendocrinology from the first recognized paper in the field by Arnold Berthold in 1849 to the major contributors of the past century. It traces the history and development of the field by exploring the women and men who conducted the studies that revealed these hormone-behavioral relationships. Most chapters are written by the individuals who knew these pioneers best, and describe their stories and discuss the ways in which their work has shaped the field. Now is the perfect time for this book. The field is burgeoning and interest in the development of theoretical perspectives is thriving. Moreover, although this field was dominated by men early on, it has become a field with near sexual parity among its faculty, society membership, and leadership, and thus serves as an example of equitable science, training, and advocacy.
Proceedings
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Author :
language : en
Publisher:
Release Date : 2001
Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Biology categories.
The Spotted Hyena
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Author : Hans Kruuk
language : en
Publisher:
Release Date : 2014-09-30
The Spotted Hyena written by Hans Kruuk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-30 with Nature categories.
In this seminal study, Hans Kruuk redefines the image of the spotted hyena, not as a common scavenger, but as a complex matriarchal predator with links to human evolution. The Spotted Hyena is the first study to capture the true behavior and ecology of these formidable predators, who instinctively adapt their social structure to meet their ecological needs. Kruuk's research reveals for the first time that hyenas combine carnivorous habits with group territoriality, thus drawing parallels between their existence and that of wolves, lions, and arguably early humans. In addition to being lovable rogues, spotted hyenas are sophisticated hunters that live in complex communities of up to 80 animals. Covering more than broad facts about this species, Kruuk addresses the vital questions concerning hyena behavior such as why females are dominant, why lions scavenge from hyenas, why hyenas hunt zebra and wildebeest differently, and how their social behavior correlates with ecology. Since its original publication, The Spotted Hyena has transformed the common perception of the spotted hyena. With nearly 2,000 citations in scientific literature, The Spotted Hyena has become a classic work and trailblazer for linking changes in animal behavior with the environment, in addition to its concentration on a large carnivore that shares several characteristics with select primates. Although this is a science book, Kruuk skips the jargon and complicated theory, thus making its conclusions easily accessible to any student of natural history, African predators, or social behavior within animal communities. The Spotted Hyena features exciting field notes in addition to comprehensive graphs and tables that have made it an invaluable contribution to behavioral ecology and its methodology. Hans Kruuk studied hyenas while living in the wilderness of Africa's Serengeti and Ngorongoro Crater for many years. After completing his doctorate with Nobel Prize winner Niko Tinbergen at the University of Oxford, Kruuk was asked by the former Tanganyika (now Tanzania) National Parks to study predation in the Serengeti. Kruuk focused on the most important carnivore there—the spotted hyena—and co-founded the Serengeti Research Institute in Tanzania to carry out his research. Many years later in 1997, he retired emeritus from his position as Senior Principal Research Officer at the Institute of Terrestrial Ecology in Banchory, Scotland. Kruuk has carried out research projects on mammals and birds on all continents, published seven books and over 120 scientific papers. Among his awards are scientific medals from the Zoological Society of London and British Mammal Society, and secondary Doctorate of Science from the University of Aberdeen where he is also Honorary Professor.
Hormones And Animal Social Behavior
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Author : Elizabeth Adkins-Regan
language : en
Publisher: Princeton University Press
Release Date : 2005-08-07
Hormones And Animal Social Behavior written by Elizabeth Adkins-Regan and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-08-07 with Psychology categories.
This book is a graduate level guide to the intersection between animal social behaviour and behavioural endocrinology. The fascinating connections between steroids, peptides and social behaviour are explored through an integrative and comparative approach combining various methods.
Knobil And Neill S Physiology Of Reproduction
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Author : Ernst Knobil
language : en
Publisher: Gulf Professional Publishing
Release Date : 2006
Knobil And Neill S Physiology Of Reproduction written by Ernst Knobil and has been published by Gulf Professional Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Science categories.
The 3rd edition, the first new one in ten years, includes coverage of molecular levels of detail arising from the last decade's explosion of information at this level of organismic organization. There are 5 new Associate Editors and about 2/3 of the chapters have new authors. Chapters prepared by return authors are extensively revised. Several new chapters have been added on the topic of pregnancy, reflecting the vigorous investigation of this topic during the last decade.The information covered includes both human and experimental animals; basic principels are sought, and information at the organismic and molecular levels are presented. *The leading comprehensive work on the physiology of reproduction*Edited and authored by the world's leading scientists in the field*Is a synthesis of the molecular, cellular, and organismic levels of organization*Bibliogrpahics of chapters are extensive and cover all the relevant literature
The Evolution Of Senescence In The Tree Of Life
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Author : Richard P. Shefferson
language : en
Publisher: Cambridge University Press
Release Date : 2017-02-23
The Evolution Of Senescence In The Tree Of Life written by Richard P. Shefferson and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-23 with Health & Fitness categories.
Top researchers in the field introduce interdisciplinary perspectives on senescence, presenting new insights and cutting-edge research.