Sasol Eerste Veldgids tot die Paddas van Suider-Afrika is ’n interessante gids tot die paddas van die streek. Volkleurfoto’s, verspreidingskaarte en verstaanbare teks sal nuwelinge en aspirantnatuurkenners help om die algemeenste paddaspesies in Suider-Afrika uit te ken, te ontdek waar hulle voorkom en te leer van hul unieke gedrag en buitengewone eienskappe.

Frogs from the genus Xenopus have long been used as model organisms in basic and biomedical research. These frogs have helped unlock key fundamental developmental and cellular processes that have led to important scientific breakthroughs and have had practical application in embryology, cancer research and regenerative medicine. Xenopus Development is a vital resource on the biology and development of these key model organisms, and will be a great tool to researchers using these frogs in various disciplines of biological science. Xenopus Development is divided into four sections, the first three highlight key processes in Xenopus development from embryo to metamophosis. These sections focus on the cellular processes, organogenesis and embryo development. The final section highlights novel techniques and approaches being used in Xenopus research. Providing thorough and detailed coverage, Xenopus Development, will be a timely and welcome volume for those working in cell and molecular biology, genetics, developmental biology and biomedical research. * Provides broad overview of the developmental biology of both Xenopus laevis and Xenopus tropicalis * Explores cellular to systems development in key biomedical model organisms * Timely synthesis of the field of Xenopus biology * Highlights key biomedical and basic biological findings unlocked by Xenopus

In a Panamanian pond, male tungara frogs (Physalaemus pustulosus) gather in choruses, giving their "advertisement" call to the females that move among them. If a female chooses to make physical contact with a male, he will clasp her and eventually fertilize her eggs. But in vying for the females, the males whose calls are most attractive may also attract the interest of another creature: the fringe-lipped bat, a frog eater. In the Tungara Frog, the most detailed and informative single study available of frogs and their reproductive behavior, Michael J. Ryan demonstrates the interplay of sexual and natural selection. Using techniques from ethology, behavioral ecology, sensory physiology, physiological ecology, and theoretical population genetics in his research, Ryan shows that large males with low-frequency calls mate most successfully. He examines in detail a number of explanations for the females' preferences, and he considers possible evolutionary forces leading to the males' success. Though certain vocalizations allow males to obtain mates and thus should be favored by sexual selection, this study highlights two important costs of such sexual displays: the frogs expand considerable energy in their mating calls, and they advertise their whereabouts to predators. Ryan considers in detail how predators, especially the frige-lipped bat (Trachops cirrhosus), affect the evolution of the tungara frog's calls.

The definitive photographic field guide to all of New Zealand's reptiles and amphibians With more than 400 extraordinary color photographs and richly informative text, Reptiles and Amphibians of New Zealand is the definitive field guide to all of the country's tuatara, geckos, skinks, frogs, marine turtles, and marine snakes. From the ancient tuatara, the sole surviving member of its order, to the world's largest collection of long-lived and live-bearing lizards, New Zealand's reptiles and amphibians represent an extraordinary part of the country's biodiversity. The only field guide to cover all of New Zealand's 123 currently recognized species, the book features authoritative and up-to-date species accounts, including names and description, as well as information on distribution, variation and similar species, habitat, and natural history. The book also provides a general introduction to these species, offering an overview of evolution, conservation, observing and collecting, ecosystems, and geographic history. Covers all of New Zealand's 123 species of reptiles and amphibians Contains more than 400 stunning new color photographs Includes a range map for every species Presents identification keys for each of the major groups Features a regional checklist and a handy quick guide on the inside flaps

Through its emphasis on recent research, its many summary tables, and its bibliography of more than 4,000 entries, this first modern, synthetic treatment of comparative amphibian environmental physiology emerges as "the" definitive reference for the field. Forty internationally respected experts review the primary data, examine current research trends, and identify productive avenues for future research.

Lever describes the introduction of each reptile and amphibian now living outside its natural range as a result of deliberate or accidental movement by humans.The impact (positive or negative) these alien species have had on the regions to which they have been introduced is also discussed.

This is a lightweight and portable guide, partly adapted from the popular and highly acclaimed A Field Guide to the Reptiles of East Africa by the same authors. Covering the most prominent 150 reptiles and 80 amphibians found in the region (Kenya, Tanzania, Uganda, Rwanda and Burundi), with concise text, photograph and map for each, this is a convenient and attractive pocket guide for a diverse and often conspicuous and attractive group of animals.

Historically, whenever tuna was hauled ashore, the sounds of battle were never far away. 'Tuna Wars' tells the untold story of the power struggles emerging around tuna, from the distant past to your present-day dinner table. In the ancient past, the giant tuna was the first fish to become the basis of a large-scale industry and a 'global' trade that created fortunes: Hannibal was able to finance his elephant campaign on Rome thanks to tuna. From the Middle Ages on, a tuna fishing monopoly on Spain's southern coast allowed the nobility to completely dominate the area and even lead the 'invincible' Armada. When the markets for tuna increased exponentially thanks to technical advances, tuna eventually became a billion-dollar business and one of the most-consumed fish species worldwide. But this massive expansion came at a price. An 18th century monk in Madrid was the first to warn that tuna fisheries needed to be run sustainably for the sake of future generations. And the issue of sustainability would go on to become a game-changer in the modern tuna wars, characterized by new alliances and partnerships, hybrid warfare and commercial power struggles. In addition to accompanying you through the history of tuna and sharing insights into fisheries science and approaches to sustainably managing fisheries, Tuna Wars offers practical guidance on choosing sustainably fished tuna. In short, it will tell you everything you ever wanted to know about tuna, but were afraid to ask.

This volume celebrates the contributions of Dr. Eugene Gaffney to the study of turtles, through a diverse and complementary collection of papers that showcases the latest research on one of the most intriguing groups of reptiles. A mix of focused and review papers deals with numerous aspects of the evolutionary history of turtles, including embryonic development, origins, early diversification, phylogenetic relationships, and biogeography. Moreover it includes reports on important but poorly understood fossil turtle assemblages, provides historical perspectives on turtle research, and documents disease and variation in turtles. With its broad scope, which includes descriptions of material and new taxa from Australia, Asia, and Europe, as well as North and South America, this work will be an essential resource for anyone interested in the morphology and evolution of turtles. "This volume's breadth of time, geography, and taxonomic coverage makes it a major contribution to the field and a 'must have' for all vertebrate paleontologists.", James F. Parham, California State University, CA, USA "A comprehensive and sweeping overview of turtle evolution by the top experts in the field that will interest everyone curious about these unique reptiles." Jason S. Anderson, University of Calgary, Canada "An invaluable addition to the literature that covers the full spectrum of approaches toward understanding the evolution of these noble creatures." Ann C. Burke, Wesleyan University, CT , USA "A truly comprehensive volume that both the student of fossil turtles, as well as the general reader interested in these enigmatic creatures, will find fascinating." Tyler Lyson, Yale University, CT, USA

This book represents an introductory review of disturbance ecology and threat analysis, providing schematic concepts and approaches useful for work on sites that are affected by the impact of human actions. It is aimed at conservation and environmental practitioners, who will find tips for choosing methods and approaches when there are conflicts between the natural components and human activity. It is also addressed to students of applied ecology, ecosystem management, land-use planning and environmental impact assessment. It discusses a number of topics covered in the programs of many university courses related to basic ecology and ecology of disturbance, the latter constituting a field of great interest because of its implications and repercussions in applied territorial science. The book is divided into two parts: the first focuses on the theoretical and disciplinary framework of the ecology of disturbance, while the second is devoted to the analysis of anthropogenic threats. This, in particular, discusses the most recent approach, which uses a conventional nomenclature to allow a coarse-grained quantification and objective assessment of threat impact on different environmental components. Such an approach facilitates the comparison of hierarchically different events and, therefore, helps define the priorities for management and conservation strategies.

This book gives a start-to-finish overview of the whole Fish4Knowledge project, in 18 short chapters, each describing one aspect of the project. The Fish4Knowledge project explored the possibilities of big video data, in this case from undersea video. Recording and analyzing 90 thousand hours of video from ten camera locations, the project gives a 3 year view of fish abundance in several tropical coral reefs off the coast of Taiwan. The research system built a remote recording network, over 100 Tb of storage, supercomputer processing, video target detection and tracking, fish species recognition and analysis, a large SQL database to record the results and an efficient retrieval mechanism. Novel user interface mechanisms were developed to provide easy access for marine ecologists, who wanted to explore the dataset. The book is a useful resource for system builders, as it gives an overview of the many new methods that were created to build the Fish4Knowledge system in a manner that also allows readers to see how all the components fit together.

This title now includes 30 additional species. Revised and updated to reflect the most current science, and including 30 new species, this authoritative and comprehensive volume is the definitive guide to the amphibians and reptiles of the Carolinas and Virginia. The new edition features 189 species of salamanders, frogs, crocodilians, turtles, lizards, and snakes, with updated color photographs, descriptions, and distribution maps for each species. It is an indispensable guide for zoologists, amateur naturalists, environmentalists, backpackers, campers, hikers, and everyone interested in the outdoors.

The present review covers a very neglected field in regeneration studies, namely, tissue and organ regeneration in reptiles, especially represented by the lizard model of regeneration. The term "regeneration" is intended here as "the ability of an adult organism to recover damaged or completely lost body parts or organs." The process of recovery is further termed "restitutive regeneration" when the lost part is reformed and capable of performing the complete or partial physiological activity performed by the original, lost body part. Lizards represent the only amniotes that at the same time show successful organ regeneration, in the tail, and organ failure, in the limb (Marcucci 1930a, b; Simpson 1961, 1970, 1983). This condition offers a unique opportunity to study at the same time mechanisms that in different regions of the same animal control the success or failure of regeneration. The lizard model is usually neglected in the literature despite the fact that the lizard is an amniote with a basic histological structure similar to that of mammals, and it is therefore a better model than the salamander (an a- mniote) model to investigate regeneration issues.

Amphibians are the extant descendants of the first vertebrate class to successfully colonize terrestrial environments; hence they occupy a unique position between fish and reptiles. Amphibian skin provides essentially no resistance to evaporative water loss, and consequently daily water turnover rates are an order of magnitude greater than in other terrestrial vertebrate groups. This has led to a suite of physiological, morphological and behavioural adaptations that have allowed a successful terrestrial existence in spite of this apparently spendthrift water retention strategy. Ecological and Environmental Physiology of Amphibians provides a synthesis of current research on the comparative physiology of amphibians with a particular emphasis on water balance. It adopts a strong environmental perspective and includes a wealth of information on ecology, phylogeny and development. As with other books in the Ecological and Environmental Physiology Series, the emphasis in this book is on the unique physiological characteristics of the amphibians, although the latest experimental techniques and future research directions are also considered. This accessible text is suitable for both graduate students and researchers in the fields of amphibian comparative physiology and physiological ecology, including specialist courses in amphibian ecology. It will also be of value and use to the many professional herpetologists requiring a concise overview of the topic.

This friendly, practical guide includes everything you need to know to pick up a spade, put in a pond and help wildlife flourish right outside your back door. Ponds are vital oases for nature. They are nursery grounds, feeding stops and bathing spots. They are genetic superhighways and vibrant ecosystems each brimming with life, interactions and potential. And they are for everyone. In The Wildlife Pond Book, Jules Howard offers a fresh perspective on ponds and encourages gardeners to reach for a garden spade and do something positive to benefit our shared neighbourhood nature. As well as offering practical tips and advice on designing, planting up and maintaining your pond, Jules encourages readers to explore the wildlife that colonises it with a torch, a microscope or a good old-fashioned pond-dipping net. With a foreword by award-winning wildlife-gardening author, Kate Bradbury, this helpful new guide includes a section outlining the hundreds of organisms that may turn up in your pond and is packed with creative ideas that have been tried and tested by author Jules Howard, an avid pond-builder, prolific pond-dipper and passionate voice for freshwater conservation for more than fifteen years. So, no matter how big your outdoor space is, The Wildlife Pond Book is the guide you need to create your very own haven for nature.

RSPB Spotlight: Frogs and Toads is packed with eye-catching, informative colour photos, and features succinct and detailed text written by an expert on these amphibians. They were bestowed with magical properties in folklore, they were sought after as ingredients of witches' broth, and they are comic characters that have invaded popular culture, from Kermit the Frog to Toad of Toad Hall. Frogs and toads are charismatic members of Britain's wildlife. But what do you really know about them? Scratch beneath the surface, and you will discover some of nature's weirdest creatures, amphibians whose ecology we are only now coming to understand. Spotlight Frogs and Toads is a compelling account of Britain's four native amphibian species: the Common Frog, the Pool Frog, the Common Toad and the rare and secretive Natterjack Toad. New research suggests that, in the next ten years, three out of four UK species are likely to be listed as threatened. Revealing a host of secrets, including how they migrate, what they eat, and how they got to the UK in the first place, Jules Howard inspires us all to look down, rather than up, in spring. The Spotlight series introduces readers to the lives and behaviour of our favourite animals with eye-catching colour photographs and informative expert text.

The success of the first volume of The Biology of Sea Turtles revealed a need for broad but comprehensive reviews of major recent advances in sea turtle biology. Biology of Sea Turtles, Volume II emphasizes practical aspects of biology that relate to sea turtle management and to changes in marine and coastal ecosystems. These topics include the interactions of humans and sea turtles, an introduction to sea turtle anatomy, sensory and reproductive biology, sea turtle habitat use and ecology, stress and health, and the maintenance of captured animals. This volume provides both historical and up-to-date information.

This book, proposed as a companion volume to Professor Holman's Pleistocene Amphibians and Reptiles in North America (OUP 1995), presents, in detail, occurences of the herpetofauna in Britain and Western and Central Europe as well as discussions on the paleogeography, paleoecology, and evolution of these groups. The format follows in general that of the volume on North America, starting with an overview of the Pleistocene in Europe followed by a bestiary and chapters on identification of fossils, sites yielding fossils, range adjustments, evolutionary and extinction patterns, and origins of modern herpetofauna in Europe.

Boas of the West Indies is a comprehensive survey of boid snakes, commonly known as boas, found on the islands of the Lucayan Archipelago, the Greater Antilles, and the Lesser Antilles. Bringing together the expertise of leading herpetologists R. Graham Reynolds, Robert W. Henderson, Luis M. Diaz, Tomas Michel Rodriguez, and Alberto R. Puente-Rolon, this volume synthesizes established knowledge and new findings on the evolutionary biology, natural history, and conservation statuses of these iconic snakes. One of the most ecologically diverse snake families, boas have inhabited the West Indies for millions of years. From the Cuban boa, which in many folk legends may grow to over twice a person's height, to the Hispaniolan vineboa, discovered only in 2020 and known to measure less than a meter long, Boas of the West Indies examines the eighteen species extant on these islands along with several others now extinct. Species accounts include details such as phenotypic traits, distribution, and behavior. Introductory chapters discuss the history of human-boa interaction, differences between West Indian and neotropical mainland boids, current conservation efforts, and more. Illustrated with over a hundred color photographs and range maps, Boas of the West Indies is a benchmark reference for herpetologists, conservationists, and snake hobbyists that expands our knowledge of-and celebrates-these fascinating creatures so integral to the ecology of these islands.

"To those who have carried out research at La Selva, as well as for the serious layperson or even a first-time ecotourist, this book will be a delight. Many of these species will be seen along forest trails or in clearings nearly every day. The beauty of this splendid guide is its concise but authoritative coverage. Guyer and Donnelly have been carrying out research at La Selva for more than 25 years and have contributed much new information on the lives of these animals. A great strength is the series of keys based primarily on live coloration for rapid and accurate identification in the field. The added value is that the book covers 90% of the amphibians and reptiles found in the Caribbean lowlands from northeastern Honduras to and including Bocas del Toro Province, Panama. In sum, my words for this book are: 'Mighty Fine'! "--Jay M. Savage, author of "The Amphibians and Reptiles of Costa Rica

"A 40-year intensive look, precisely what we all wished we had had when we first stepped into the Neotropical rainforest. Cleanly written, in a language easily accessible to the citizen naturalist . . . . and coupled with the essential many good color photos, this book is THE herpetological starting point for any naturalist, biodiversity manager, and scientist exploring lowland Central American rainforest. It superbly complements Savage's country-wide coverage."--Daniel H. Janzen, editor of "Costa Rican Natural History

"This book is an important contribution to our understanding of the herpetofauna of one of the world's foremost tropical field stations. It represents an essential step toward easy field identification of an important group of tropical vertebrates. It will serve as a stimulusand set the standard, not only for herpetologists, but for students of other groups interested in producing easily used, attractive guides to local faunas and floras."--Don E. Wilson, Senior Scientist, Smithsonian Institution, and Chairman of the Board, Organization for Tropical Studies

The Pacific is not only the world's largest body of water; its vast expanse also includes an extraordinary number and diversity of oceanic islands, from Palau and the Marianas east of the Philippines to Cocos Island and the Galapagos west of the Americas. The isolation of these islands and the extreme distances between them long prevented scientists from studying their floras and faunas in a comparative context. But now George R. Zug, one of the world's foremost experts on the diverse reptiles and amphibians of the Pacific Basin, offers the first such systematic overview in more than half a century. Reptiles and Amphibians of the Pacific Islands is a compendium of frogs, lizards, snakes, and turtles living on these lands and in the adjacent waters of the oceanic islands in the tropical Pacific. The means to identify each species is included, along with entries that describe each animal's form, coloration, habitat, distribution, reproductive biology, and natural history. Color plates of more than 75 percent of the species also help to facilitate visual identification. This accessible and informative guide is the most comprehensive field guide available and will appeal to both novice sightseers and professional naturalists.