Download or read book Nesting in reptiles natural and anthropogenic threats and evolutionary responses written by J. Sean Doody and published by Frontiers Media SA. This book was released on 2023-01-06 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reptilian Incubation written by Denis Charles Deeming and published by . This book was released on 2004-01-01 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reptiles have been a topic for scientific study for many decades and remain widely studied around the world. In particular, their reproductive patterns and strategies have been extensively studied, proving useful in analysis of life-history strategies. A pivotal aspect of reptilian reproduction is incubation of eggs. Oviparity is found in all turtles, crocodilians and the tuatara and is prevalent in many lizards and snakes. Many aspects of the eggs, embryos and incubation conditions have been the subject of numerous scientific reports. This volume is dedicated to systematic analysis of reptilian incubation. The concept for the book is to look at reptilian eggs, development and incubation conditions in a functional way with particular emphasis on the natural incubation environment and, rather than concentrating on Family accounts, (e.g. incubation in crocodilians) the chapters review the topics in all reptile types allowing for the first time a systematic comparison of incubation between crocodilians, turtles and squamates. In addition to reviewing current information, the authors briefly look towards the future and outline areas where further research is needed.

Download or read book Temperature Dependent Sex Determination in Vertebrates written by Nicole Valenzuela and published by Smithsonian Institution Scholarly Press. This book was released on 2004 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by the world's foremost authorities on the subject, with essays by leading scholars in the field, this work shows how the sex of reptiles and many fish is determined not by the chromosomes they inherit but by the temperature at which incubation takes place.

Download or read book Sex Reversal in the Alpine Skink Bassiana Duperreyi written by Duminda S.B.D.D. Mudiyanselage and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Global climatic change has significant impacts on several aspects of the biology and ecology of many reptile species on earth, which in some cases has led to population declines or other severe threats. Until now, however, such impacts have not been reviewed for many reptiles, even though these species are often at the critical stage at the conservation priorities. Changing temperature is increasingly being considered one of the major threats for reptiles, especially for species where temperature extremes can influence the outcome of sex determination. In reptiles, sex can be determined genetically (genotypicsex determination or GSD) or environmentally, depending on their incubation temperature (temperature sex determination or TSD). Typically, the two alternatives of sex determination were thought to be incompatible and were never observed in the same species, however sex reversal of some GSD species under extreme environmental conditions, confirmed in wild populations, has revealed that intermediate states are possible. Sex determination in the endemic Australian skink Bassiana duperreyi is influenced by both genetic factors and nest temperature. The discordance between genotypic and phenotypic was observed definitively in the laboratory conditions. Whether sex reversal occurs in natural nests and whether sex-reversed individuals survive to adulthood in wild populations is unknown. Furthermore, it is unclear whether the interaction of sex reversal of male XX individuals under low temperatures occurs at a rate sufficient to trigger loss of the Y chromosome and evolutionary transitions between GSD and TSD. To address these questions in the wild population of B. duperreyi, we first developed reliable molecular techniques to identify sex reversal male (XX) from normal male (XY), is known as in silico whole-genome subtraction. We used this technique to isolate seven Y chromosome specific markers for B. duperreyi. In chapter 3, using these markers, we demonstrated that sex reversal in the wild for the first time in adults of a reptile species with XX/XY sex determination. The highest frequency of sex reversal occurred at the highest coolest elevation location, Mt Ginini (18.46%) and decreased in frequency to zero with decreasing elevation. We model the impact of this under Fisher's frequency-dependent selection to show that, at the highest elevations, populations risk the loss of the Y chromosome and a transition to temperature-dependent sex determination. We also applied our Y chromosome markers to hatchlings, in chapter 5, similar to what we discovered in adults, we discovered that the levels of sex reversal in nests of B. duperreyi, ranged from 28.6% at the highest, coolest locations to zero at the lowest, warmest locations. Further, we observed that the constant temperature equivalent in wild nests dropped below the 20°C during the thermosensitive period, for even for a short time during the incubation period, sex reversal was observed. Therefore, extreme cold temperature events might lead to 100% sex reversal of the XX genotype in the alpine populations. The variation in the frequency of sex reversal in B. duperreyi as a phenotypicresponse to environmental temperature with altitude, and early work using mtDNA has raised the possibility that underlying phylogenetic history may be confounding interpretation of variation in the frequency of sex reversal with elevation. To test this, in chapter 4, we examined the underlying genetic structure within the geographic wide populations on its distribution used single nucleotide polymorphisms (SNP) generated by reduced representation sequencing. We generated 12,532 reliable polymorphic SNP loci from 60 populations (263 individuals) covering the distribution of B. duperreyi to assessgene flow and to define population structure in the form of diagnosable lineages. We identified five well-supported diagnosable operational taxonomic units (OTUs) within B. duperreyi. Low levels of divergence of B. duperreyi between mainland Australia and Tasmania (no fixed allelic differences) support the notion of episodic exchange of alleles across Bass Strait (ca 60 m, 25 Kya) during periods of low sea level during the Upper Pleistocene rather than the much longer period of isolation (1.7 My) indicated by earlier studies using mitochondrial sequence variation. Our study provides foundational work forthe detailed taxonomic re-evaluation of this species complex and the need for biodiversity assessment to include an examination of cryptic species and/or cryptic diversity below the level of species. This thesis contributes to our understanding of the risks of population demography due to climate change in species subject to sex reversal by temperature, and sex reversal in this alpine skink makes it a sensitive indicator of climate change, both in terms of changes in average temperatures, and in terms of climatic variability will provide focus for future research to test on-the-ground management strategies to mitigate the effects of climate in local populations. Further, we provide evidence that sex reversal by cool temperatures in B. duperreyi occurs in the wild, influences the sexual genotypes-phenotype combinations in adult populations, and is as such a potential means of rapid evolutionary responses to climate change.

Download or read book Reptile Ecology and Conservation written by C. Kenneth Dodd and published by Oxford University Press. This book was released on 2016 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical handbook of reptile field ecology and conservation brings together a distinguished, international group of reptile researchers to provide a state-of-the-art review of the many new and exciting techniques used to study reptiles. The authors describe ecological sampling techniques and how they are implemented to monitor the conservation status and population trends of snakes, lizards, tuatara, turtles, and crocodilians throughout the world. Emphasis is placed on the extent of statistical inference and the biases associated with different techniques and analyses. The chapters focus on the application of field research and data analysis for achieving an understanding of reptile life history, population dynamics, movement patterns, thermal ecology, conservation status, and the relationship between reptiles and their environment. The book emphasises the need for thorough planning, and demonstrates how a multi-dimensional approach incorporates information related to morphology, genetics, molecular biology, epidemiology, statistical modelling, animal welfare, and biosecurity. Although accentuating field sampling, sections on experimental applications in laboratories and zoos, thermal ecology, genetics, landscape ecology, disease and biosecurity, and management options are included. Much of this information is scattered in the scientific literature or not readily available, and the intention is to provide an affordable, comprehensive synthesis for use by graduate students, researchers, and practising conservationists worldwide.

Download or read book Reptiles in Research written by Claudia Altavilla and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reptiles demonstrate remarkable diversity across the landscape. From inland habitats of deserts and grasslands to coastal plains and oceans, the unique adaptations and life histories of reptiles have been shaped by a suite of abiotic and biotic factors. It is the interface between the organism and its environment that present biologists with the opportunity to explore how reptiles behaviourally and physiologically respond to their environments and to determine what factors govern their ecology. This book captures the interests of all readers with a text that is foundational for the novice herpetologist, while informative for beginning students and seasoned research scientists. This book offers its readers a glimpse into the passions of scientists who find reptiles fascinating creatures of study. You will see how reptiles serve as organismal models that continue to advance our knowledge and understanding of complex biological processes and systems. Dr William I Lutterschmidt (Professor of Physiological Ecology) has invited top researchers from around the world to share their personal research interests and illustrate how environment influences the ecology, physiology, and behaviour of reptiles. This book will introduce a diversity of research fields and reptilian species, from how web-footed geckos move in desert sands to how sea snakes cope physiologically with high salinity. Topics include invasive species, urban ecology, mathematical simulation, sexual selection, hybridisation and gene flow, chemical ecology, neurobiology, spatial ecology, conservation biology, biodiversity, immunology, and molecular biology.

Download or read book Ecology and Conservation of Birds in Urban Environments written by Enrique Murgui and published by Springer. This book was released on 2017-02-10 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides syntheses of ecological theories and overarching patterns of urban bird ecology that have only recently become available. The numerous habitats represented in this book ranges from rows of trees in wooded alleys, to wastelands and remnants of natural habitats encapsulated in the urban matrix. Authored by leading scientists in this emergent field, the chapters explore how the characteristics of the habitat in urban environments influence bird communities and populations at multiple levels of ecological organization and at different spatial and temporal scales, and how this information should be incorporated in urban planning to achieve an effective conservation of bird fauna in urban environments. Birds are among the most conspicuous and fascinating residents of urban neighborhoods and provide urban citizens with everyday wildlife contact all over the world. However, present urbanization trends are rapidly depleting their habitats, and thus knowledge of urban bird ecology is urgently needed if birds are to thrive in cities. The book is unique in its inclusion of examples from all continents (except Antarctica) in an effort to arrive at a more holistic perspective. Among other issues, the individual chapters address the censusing of birds in urban green spaces; the relationship between bird communities and the structure of urban green spaces; the role of exotic plant species as food sources for urban bird fauna; the influence of artificial light and pollutants on bird fauna; trends in long-term urban bird research, and transdisciplinary studies on bird sounds and their effects on humans. Several chapters investigate how our current knowledge of the ecology of urban bird fauna should be applied in order to achieve better management of urban habitats so as to achieve conservation of species or even increase species diversity. The book also provides a forward-looking summary on potential research directions. As such, it provides a valuable resource for urban ecologists, urban ecology students, landscape architects, city planners, decision makers and anyone with an interest in urban ornithology and bird conservation. Moreover, it provides a comprehensive overview for researchers in the fields of ecology and conservation of urban bird fauna.

Download or read book Reptile Ecology and Conservation written by C. Kenneth Dodd Jr. and published by Oxford University Press. This book was released on 2016-05-05 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical handbook of reptile field ecology and conservation brings together a distinguished, international group of reptile researchers to provide a state-of-the-art review of the many new and exciting techniques used to study reptiles. The authors describe ecological sampling techniques and how they are implemented to monitor the conservation status and population trends of snakes, lizards, tuatara, turtles, and crocodilians throughout the world. Emphasis is placed on the extent of statistical inference and the biases associated with different techniques and analyses. The chapters focus on the application of field research and data analysis for achieving an understanding of reptile life history, population dynamics, movement patterns, thermal ecology, conservation status, and the relationship between reptiles and their environment. The book emphasises the need for thorough planning, and demonstrates how a multi-dimensional approach incorporates information related to morphology, genetics, molecular biology, epidemiology, statistical modelling, animal welfare, and biosecurity. Although accentuating field sampling, sections on experimental applications in laboratories and zoos, thermal ecology, genetics, landscape ecology, disease and biosecurity, and management options are included. Much of this information is scattered in the scientific literature or not readily available, and the intention is to provide an affordable, comprehensive synthesis for use by graduate students, researchers, and practising conservationists worldwide.

Download or read book Biology Digest written by and published by . This book was released on 1996 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecotoxicology of Amphibians and Reptiles written by Donald W. Sparling and published by CRC Press. This book was released on 2010-06-02 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building on the success of its popular predecessor, the second edition of Ecotoxicology of Amphibians and Reptiles presents newly available findings on the species that are important environmental indicators. This new edition covers nearly twice as many topics as the first, including recent developments in the ecotoxicology of amphibians and reptil

Download or read book Reptiles written by T. S. Kemp and published by Oxford University Press, USA. This book was released on 2019 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: From dinosaurs to lizards, snakes, and turtles, Tom Kemp considers the range of reptiles which have walked our Earth. Exploring how evolutionary adaptions have fitted them to their individual niches, he discusses their biology, such as cold bloodedness and feeding habits, and analyses why reptiles have been so successful throughout history.

Download or read book Alien Reptiles and Amphibians written by Fred Kraus and published by Springer Science & Business Media. This book was released on 2008-12-19 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transportation of species to areas outside their native ranges has been a feature of human culture for millennia. During this time such activities have largely been viewed as beneficial or inconsequential. However, it has become increasingly clear that human-caused introductions of alien biota are an ecological disruption whose consequences rival those of better-known insults like chemical pollution, habitat loss, and climate change. Indeed, the irreversible nature of most alien-species int- ductions makes them less prone to correction than many other ecological problems. Current reshuffling of species ranges is so great that the present era has been referred to by some as the “Homogocene” in an effort to reflect the unique mag- tude of the changes being made. These alien interlopers often cause considerable ecological and economic d- age where introduced. Species extinctions, food-web disruptions, community alte- tions, ecosystem conversion, changes in nutrient cycling, fisheries collapse, watershed degradation, agricultural loss, building damage, and disease epidemics are among the destructive – and frequently unpredictable – ecological and economic effects that invasive alien species can inflict. The magnitude of these damages c- tinues to grow, with virtually all environments heavily used by humans now do- nated by alien species and many “natural” areas becoming increasingly prone to alien invasion as well. Attention to this problem has increased in the past decade or so, and efforts to prevent or limit further harm are gaining wider scientific and political acceptance.

Download or read book Conservation of Caribbean Island Herpetofaunas Volume 2 Regional Accounts of the West Indies written by Adrian Hailey and published by BRILL. This book was released on 2011-04-07 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the islands of the Caribbean have long histories of herpetological exploration and discovery, and even longer histories of human-mediated environmental degradation. Collectively, they constitute a major biodiversity hotspot – a region rich in endemic species that are threatened with extinction. This two-volume series documents the existing status of herpetofaunas (including sea turtles) of the Caribbean, and highlights conservation needs and efforts. Previous contributions to West Indian herpetology have focused on taxonomy, ecology and evolution, particularly of lizards. This series provides a unique and timely review of the status and conservation of all groups of amphibians and reptiles in the region. This volume provides regional accounts of the islands of the West Indies biogeographic region.

Download or read book Taking Back Philosophy written by Bryan W. Van Norden and published by Columbia University Press. This book was released on 2017-12-05 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are American colleges and universities failing their students by refusing to teach the philosophical traditions of China, India, Africa, and other non-Western cultures? This biting and provocative critique of American higher education says yes. Even though we live in an increasingly multicultural world, most philosophy departments stubbornly insist that only Western philosophy is real philosophy and denigrate everything outside the European canon. In Taking Back Philosophy, Bryan W. Van Norden lambastes academic philosophy for its Eurocentrism, insularity, and complicity with nationalism and issues a ringing call to make our educational institutions live up to their cosmopolitan ideals. In a cheeky, agenda-setting, and controversial style, Van Norden, an expert in Chinese philosophy, proposes an inclusive, multicultural approach to philosophical inquiry. He showcases several accessible examples of how Western and Asian thinkers can be brought into productive dialogue, demonstrating that philosophy only becomes deeper as it becomes increasingly diverse and pluralistic. Taking Back Philosophy is at once a manifesto for multicultural education, an accessible introduction to Confucian and Buddhist philosophy, a critique of the ethnocentrism and anti-intellectualism characteristic of much contemporary American politics, a defense of the value of philosophy and a liberal arts education, and a call to return to the search for the good life that defined philosophy for Confucius, Socrates, and the Buddha. Building on a popular New York Times opinion piece that suggested any philosophy department that fails to teach non-Western philosophy should be renamed a “Department of European and American Philosophy,” this book will challenge any student or scholar of philosophy to reconsider what constitutes the love of wisdom.

Download or read book Gal pagos written by John Kricher and published by Princeton University Press. This book was released on 2022-11-29 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A richly illustrated nature tour of Galápagos—now expanded, thoroughly updated, and with more than 650 color photographs Galápagos is a comprehensive, up-to-date, and profusely illustrated natural history of this spectacular archipelago. Offering much more information than identification guides, the book provides detailed accounts and more than 650 color photographs of the islands’ habitats, marine life, reptiles, birds, mammals, and plants, making the book a virtual nature tour of Galápagos. Galápagos experts John Kricher and Kevin Loughlin have thoroughly revised the original text, bringing all the taxonomy up to date and adding a wealth of new information. Individual chapters cover geology, ecology, human history, Darwin’s finches and how Darwin came to his theory of natural selection from his visit to the islands, Galápagos tortoises, marine and land iguanas, mammals, seabirds, landbirds, marine life, and conservation challenges and initiatives. The concluding chapter covers each of the individual islands, including landing sites, unique plant and animal species, and points of interest, and serves as a wonderful guide for visitors as they move from island to island or plan a trip to Galápagos. With its combination of rich text and splendid photos, Galápagos is essential reading for the ecotraveler and nature enthusiast alike. Now with more than 650 color photographs, showing habitats, geology, marine life, and all the commonly encountered reptiles, birds, mammals, and plantsFeatures a detailed island-by-island guide, including landing sites and what visitors can expectEssential reading for the ecotraveler and nature enthusiast

Download or read book Gal pagos written by John C. Kricher and published by Princeton University Press. This book was released on 2022-11-29 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A richly illustrated nature tour of Galápagos—now expanded, thoroughly updated, and with more than 650 color photographs Galápagos is a comprehensive, up-to-date, and profusely illustrated natural history of this spectacular archipelago. Offering much more information than identification guides, the book provides detailed accounts and more than 650 color photographs of the islands’ habitats, marine life, reptiles, birds, mammals, and plants, making the book a virtual nature tour of Galápagos. Galápagos experts John Kricher and Kevin Loughlin have thoroughly revised the original text, bringing all the taxonomy up to date and adding a wealth of new information. Individual chapters cover geology, ecology, human history, Darwin’s finches and how Darwin came to his theory of natural selection from his visit to the islands, Galápagos tortoises, marine and land iguanas, mammals, seabirds, landbirds, marine life, and conservation challenges and initiatives. The concluding chapter covers each of the individual islands, including landing sites, unique plant and animal species, and points of interest, and serves as a wonderful guide for visitors as they move from island to island or plan a trip to Galápagos. With its combination of rich text and splendid photos, Galápagos is essential reading for the ecotraveler and nature enthusiast alike. Now with more than 650 color photographs, showing habitats, geology, marine life, and all the commonly encountered reptiles, birds, mammals, and plants Features a detailed island-by-island guide, including landing sites and what visitors can expect Essential reading for the ecotraveler and nature enthusiast

Download or read book The Reptiles of Ohio written by Roger Conant and published by Sagwan Press. This book was released on 2018-02-08 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.