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Renni the Rescuer
by Felix Salten Kenneth C. KaufmanFrom the author of Bambi, this story of a boy, his dog, and their bravery reaches a new generation of readers with a fresh look.George has always wanted a dog, so when he picks up small Renni, the runt of a litter of German Shepherd puppies, he immediately falls in love. As Renni grows, George begins to teach him, and soon Renni is able to do remarkable things. When a trainer suggests Renni become a rescue dog, George knows it's a perfect fit for his pet. Soon Renni is able to find anyone in any situation. Then the war that has been looming finally begins, and Renni and George enlist. They are able to help many soldiers during training camp--but when they are tested in the actual battlefield, can the two friends hold their ground? Or are they unprepared for the trials ahead?
Rent a Third Grader
by B. B. HillerEveryone in Miss Bilgore's third grade class loves Partner, a retired police horse. But it looks like Partner is headed for a terrible fate--pet food! Then the kids get an idea: each third grader will find odd jobs and earn money to pay for Partner's care.
Reporting for Duty: True Stories of Wounded Veterans and Their Service Dogs
by Tracy J. LibbyInspirational accounts of veterans who have moved forward from mental and physical injuries toward healthier lives with the help of service dogs. Hundreds of thousands of military veterans seek treatment for post-traumatic stress disorder (PTSD) each year. Service dogs have been used for many years in the civilian sector to help their disabled owners perform necessary tasks in daily life; likewise, the organized use of therapy dogs to bring comfort and companionship to hospital and nursing-home patients dates back more than four decades. Reporting for Duty explores the unique and special bond between wounded warriors—especially those suffering from PTSD—and their service dogs and discusses the vital work of therapy dogs who visit VA hospitals and military rehabilitation facilities. Author Tracy Libby tells the true stories of disabled veterans who have been touched, assisted, and enriched by the dogs in their lives, and the new lease on life is reciprocal: many of these service and therapy dogs have been rescued from shelters and specially trained for their jobs. A portion of proceeds from the sale of this book will benefit a veterans&’ service-dog organization.Inside Reporting for Duty . . .True stories of physically and mentally disabled veterans who count on service dogs for assistance with daily tasksAn explanation of PTSD and how it affects military veteransHow therapy dogs and service dogs are selected and trained for their jobsRescuing shelter dogs to train for therapy and service workHow the military is training dogs to accompany soldiers on deploymentsA look at the bond between people and dogs and the positive effects it has on both
Reproduction and Development in Annelida (Reproduction and Development in Aquatic Invertebrates)
by T. J. PandianThis book is a concise informative elucidation of all aspects of reproduction and development in annelids covering from arenicola to tubifex. Annelids flourish between 4,900 m depth to 2,000 m altitude; some of them occur in unusual habitats like hydrothermal vents and subterranean aquatic system (stigobionts). A few have no gut and acquire adequate nutrients through osmotrophism and/or engaging symbiotic microbes. In the absence of exoskeleton to escape predation, the 17,000 speciose annelids have explored bewildering modes of reproduction; not surprisingly, 42–47% of them are brooders. With 13,000 species, polychaetes are gonochores but some 207 species of them are hermaphrodites. Clitellates are all hermaphrodites; of them, 76 species are parthenogens, of which 56 are earthworms. Regenerative potency of annelids ranges from an organ to an entire worm from a single ‘seminal’ segment. The head, tail and both together can be regenerated 21, 42 and 20 times, respectively. However, the potency is limited to ~1% of polychaetes and Heterogamatic sex determination is reported to occur only in six polychaete species, although karyotype is known for 83 annelid species. In temperate polychaetes, a dozen neuroendocrines, arising mostly from the ‘brain’ regulates reproductive cycle. A complete chapter devoted to vermiculture, (i) recognizes the fast-growing candidate species, (ii) distinguishes 'layers' from 'brooders', (iii) indicates that the harvest of oligochaetes may reduce the input of nitrogenous fertilizer in the ricefield, and (iv) explores the scope for increasing wealth from waste.
Reproduction and Development in Echinodermata and Prochordata (Reproduction and Development in Aquatic Invertebrates)
by T. J. PandianEchinoderms and prochordates occupy a key position in vertebrate evolution. The genomes of sea urchin share 70% homology with humans. Researches on cell cycle in sea urchin and phagocytosis in asteroids have fetched Nobel Prizes. In this context, this book assumes immense importance. Echinoderms are unique, as their symmetry is bilateral in larvae but pentamerous radial in adults. The latter has eliminated the development of an anterior head and bilateral appendages. Further, the obligate need to face the substratum for locomotion and acquisition of food has eliminated their planktonic and nektonic existence. Egg size, a decisive factor in recruitment, increases with decreasing depths up to 2,000-5,000 m in lecithotrophic asteroids and ophiuroids but remains constant in their planktotrophics. Smaller ( 110 mm) asteroids generate planktotrophic eggs only. Publications on sex ratio of echinoderms indicate the genetic determination of sex at fertilization but those on hybridization, karyotype and ploidy induction do not provide evidence for heterogametism. But the herbivorous echinoids and larvacea with their gonads harboring both germ cells and Nutritive Phagocytes (NPs) have economized the transportation and hormonal costs on gonadal function. Despite the amazing potential just 2 and 3% of echinoderms undergo clonal reproduction and regeneration, respectively. Fission is triggered, when adequate reserve nutrients are accumulated. It is the most prevalent mode of clonal reproduction in holothuroids, asteroids and ophiuroids. However, budding is a more prevalent mode of clonal reproduction in colonial hemichordates and urochordates. In echinoderms, fission and budding eliminate each other. Similarly, autoregulation of early development eliminates clonal reproduction in echinoids and solitary urochordates. In pterobranchs, thaliaceans and ascidians, the repeated and rapid budding leads to colonial formation. Coloniality imposes reductions in species number and body size, generation time and life span, gonad number and fecundity as well as switching from gonochorism to simultaneous hermaphorditism and oviparity to ovoviviparity/viviparity.
Reproduction and Development in Minor Phyla (Reproduction and Development in Aquatic Invertebrates)
by T. J. PandianThe 26 recognized minor phyla comprise aberrant clades, as most of them terminate as blind offshoots. Untied from the discussion on their phylogenesis of minor phyla, this book is largely devoted, for the first time, to aspects of reproduction and development in minor phyletics. The minor phyla are not as speciose (1,795 species/phylum) as the major phyla (157,066 species/phylum) are. The accumulation of deleterious genes causes inbreeding depression among progenies arising from parthenogenesis, clonal multiplication and selfing hermaphrodites. The reason for the limited species diversity in minor phyla is traced to (i) eutelism in 65.7% of minor phyletics and (ii) existence of 21.6% clonals, (iii) 6.4% parthenogens and (iv) 1.2% selfing hermaphroditism. Gonochorism obligately requires motility to search for a mate. The combination of low motility and gonochorism from Placozoa to hemocoelomatic minor phyla has limited diversity to
Reproduction and Development in Mollusca (Reproduction and Development in Aquatic Invertebrates #2)
by T. J. PandianThis book is perhaps the first attempt to comprehensively project the uniqueness of molluscs, covering almost all aspects of reproduction and development from aplacophorans to vampyromorphic cephalopods. Molluscs are unique for the presence of protective external shell, defensive inking, geographic distribution from the depth of 9,050 m to an altitude of 4,300 m, gamete diversity, the use of nurse eggs and embryos to accelerate the first few mitotic divisions in embryos, the natural occurrence of androgenics in a couple of bivalves, viable induced tetraploids, gigantism induced by elevated ploidy, the complementary role played by mitochondrial genome in sex determination by nuclear genes and the uptake and accumulation of steroid hormone from surrounding waters. In molluscs, sexuality comprises of gonochorism ( 24%), protandry (
Reproduction and Sexuality in Marine Fishes
by Kathleen S. ColeMarine fishes represent astonishing diversity with respect to practically every aspect of their biology. Reproductive modes and sexual patterns are especially fascinating and provide deep insight into general evolutionary problems. In this volume, chapters focus on reproduction and sexuality among groups of fishes defined by habitat, taxon, and the reproductive processes that are critical for reproductive success. The book illustrates how knowledge of reproductive biology among marine fishes can help identify vulnerable and potentially vulnerable species in the face of changing environmental conditions and increasing human-based pressures.
Reproduction in Aquatic Animals: From Basic Biology to Aquaculture Technology
by Manabu Yoshida Juan F. AsturianoThis book provides an up-to-date overview of the various reproductive systems of a variety of aquatic animals, from invertebrates to fishes. While all terrestrial animals use internal fertilization, aquatic animals have diverse reproductive systems. Some are internal fertilizers with or without mating, but many perform external fertilization. Because of this diversity, the reproductive systems of aquatic animals represent excellent models for the study of adaptive evolution and the species specificity of fertilization. In addition, many aquatic animals, including fish, crustaceans, and mollusks, are important as fishery and aquaculture resources. In this book, up-and-coming researchers examine reproductive systems in representative aquatic animals, covering both the basic knowledge and late-breaking results. Reproduction in Aquatic Animals: From Basic Biology to Aquaculture Technology will be of interest to graduate and postgraduate students in biology and agricultural sciences, as well as to researchers and technicians in the fields of reproductive biology and fishery science and to non-academics.
Reproduction in Farm Animals
by B. Hafez E.S.E. HafezWhen you’re looking for a comprehensive and reliable text on large animal reproduction, look no further! the seventh edition of this classic text is geared for the undergraduate student in Agricultural Sciences and Veterinary Medicine. In response to reader feedback, Dr. Hafez has streamlined and edited the entire text to remove all repetitious and nonessential material. That means you'll learn more in fewer pages. Plus the seventh editing is filled with features that help you grasp the concepts of reproduction in farm animals so you'll perform better on exams and in practice: condensed and simplified tables, so they're easier to consult an easy-to-scan glossary at the end of the book an expanded appendix, which includes graphic illustrations of assisted reproduction technology Plus, you'll find valuable NEW COVERAGE on all these topics: Equine Reproduction: expanded information reflecting today's knowledge Llamas (NEW CHAPTER) Micromanipulation of Gametes and In Vitro Fertilization (NEW CHAPTER!) Reach for the text that's revised with the undergraduate in mind: the seventh edition of Hafez's Reproduction in Farm Animals.
Reproduction in Mammals: The Female Perspective
by Virginia Hayssen Teri J. OrrA fascinating look at the diverse reproductive strategies of numerous female mammals, from hyenas to goats, kangaroos to whales.Newborn mammals can weigh as little as a dime or as much as a motorcycle. Some receive milk for only a few days, whereas others nurse for years. Humans typically have only one baby at a time following nine months of pregnancy, but other mammals have twenty or more young after only a few weeks in utero. What causes this incredible reproductive diversity? In Reproduction in Mammals, Virginia Hayssen and Teri J. Orr present readers with a fascinating examination of the varied reproductive strategies of a broad spectrum of mammals, from marsupials to whales. This unique book's comprehensive coverage gathers stories from many taxa into a single, cohesive perspective that centers on the reproductive lives of females. The authors shed light on a number of intriguing questions, including• do bigger moms have bigger babies?• do primates have longer pregnancies than other groups?• does habitat influence animals' reproductive patterns?• do carnivores typically produce larger litters than prey species?The book opens with the authors' definition of what constitutes a female perspective and an examination of the evolution of reproduction in mammals. It then outlines the typical individual mammalian female: her genetics, anatomy, and physiology. Taking a nuanced approach, Hayssen and Orr describe the female reproductive cycle and explore female mammals' interactions with males and offspring. Readers will come away from this thought-provoking book with an understanding of not only how reproduction fits into the lives of female mammals but also how biology has affected the enormously diverse reproductive patterns of the phenotypes we observe today.
Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage: Aphredoderidae through Cottidae, Moronidae, and Sciaenidae, Volume 5
by Robert Wallus Thomas P. SimonThis seven-volume series is the most extensive treatise on early life histories of the freshwater fishes of North America. It represents the state-of-the-art in fishery biology and provides a systematic approach to the study of early life histories of all the fishes in this region. Each volume contains distinguishing characteristics and a pictorial
Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage: Elassomatidae and Centrarchidae, Volume 6
by Thomas P. Simon Robert WallusThis seven-volume series is the most extensive treatise on early life histories of the freshwater fishes of North America. It represents the state-of-the-art in fishery biology and provides a systematic approach to the study of early life histories of all the fishes in this region. Each volume contains distinguishing characteristics and a pictorial
Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage: Ictaluridae - Catfish and Madtoms, Volume 3
by Thomas P. Simon Robert WallusThis series fills immense gaps in knowledge of issues related to early life development of fishes in the Ohio basin. Volume III addresses the developmental and morphological issues of catfish and madtoms. This volume describes the characteristics of the Ictaluridae family, and provides a detailed pictorial guide. Subtopics within each species description includes range, distribution, occurrence, spawning, eggs, development, ecology of early life phases, and more. This book serves as both a guide to help identify individual larval fish and as a reference for environmental managers concerned with the overall health of the ecosystem that they are monitoring.
Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage: Percidae - Perch, Pikeperch, and Darters, Volume 4
by Thomas P. Simon Robert WallusKnowledge of the early life stages of fishes is crucial for the effective monitoring and management of fish populations and habitats, and the evaluation of environmental impacts and recovery of endangered species. Unfortunately, the proper identification of targeted species has stunted the development of the field. Now a series has emerged
Reproductive Sciences in Animal Conservation: Progress And Prospects (Advances in Experimental Medicine and Biology #1200)
by William V. Holt Janine L. Brown Pierre ComizzoliThis second edition emphasizes the environmental impact on reproduction, with updated chapters throughout as well as complete new chapters on species such as sharks and rays. This is a wide-ranging book that will be of relevance to anyone involved in species conservation, and provides critical perspectives on the real utility of current and emerging reproductive sciences.Understanding reproductive biology is centrally important to the way many of the world’s conservation problems should be tackled. Currently the extinction problem is huge, with up to 30% of the world’s fauna being expected to disappear in the next 50 years. Nevertheless, it has been estimated that the global population of animals in zoos encompasses 12,000 – 15,000 species, and we anticipate that every effort will be made to preserve these species for as long as possible, minimizing inbreeding effects and providing the best welfare standards available. Even if the reproductive biology community cannot solve the global biodiversity crisis for all wild species, we should do our best to maintain important captive populations. Reproductive biology in this context is much more than the development of techniques for helping with too little or too much breeding. While some of the relevant techniques are useful for individual species that society might target for a variety of reasons, whether nationalistic, cultural or practical, technical developments have to be backed up by thorough biological understanding of the background behind the problems.
Reproductive Strategies in Insects
by OmkarReproduction is one of the most inherent tasks that all living organisms are actively involved in. It forms the backbone of their existence with all evolutionary energies directed over billion years of creation into maximizing reproductive effort. For so simple and directed a need such as maximizing reproduction, it is interesting to see how much diversity and complexity exists in this task. Each organism despite having the same end goal employs different strategies. The complexities, intricacies and strategies of successful reproduction while being extremely fascinating are equally befuddling. Reproductive Strategies in Insects provides an expansive critical look at the reproductive strategies of the most diverse group of animals, the insects. Insects which inhabit myriad niches in all ecosystems except the oceans, show the most diverse reproductive strategies ranging from simplest to most complex. Reproductive strategies, viz., search for mates, number of mates, display of mate quality, assessment of mate quality, acceptance of mate, rejection of mates, forced copulations, the fight for paternity pre, during and post copula, the modulation of paternity, ovipositional strategies and parental care are described in detail in this book. Also, each strategy in analyzed in relation to its morphological, physiological, ethological, ecological and evolutionary aspects. Features: Covers a wide variety of reproductive strategies, A detailed step by step description of reproductive strategies. Discusses morphological, physiological, ethological, ecological and evolutionary aspects. Modulation of these strategies and responsible modulatory factors are also discussed. Well-illustrated. Recent research results and probable future research directions. This is a niche reference book for ethologists, biologists studying behavioural evolution and entomologists. It may also be used as a textbook for a graduate level course in behaviour.
Reproductive Technologies in Farm Animals
by Ian GordonBuilding on the successful structure of the first edition, the second edition of Reproductive Technologies in Farm Animals has been totally updated and revised to provide an up to date account of the key techniques employed in manipulating reproduction in farm animals, including beef and dairy cattle, pigs, sheep, goats, buffaloes, camelids, horses and poultry. A classic introductory text to the subject, the book is based on a comprehensive review of the current literature. It: - outlines different agricultural systems and explores the ethical implications of modern farming methods; - details the many new developments, including the commercial application of sexed semen and large-scale application of in vitro produced cattle embryos; - provides a valuable synopsis of current and future reproductive technologies, such as cloning and the production of transgenic animals. This text remains key reading for students in animal science, agriculture, veterinary medicine and biology, and veterinary practitioners and farmers who wish to keep updated on developments in techniques that may be useful in their daily practice.
Reproductive and Developmental Strategies: The Continuity of Life (Diversity and Commonality in Animals)
by Kazuya Kobayashi Takeshi Kitano Yasuhiro Iwao Mariko KondoThis book provides new insights into the universality of biological systems in animal reproduction and development by a comparative study of a variety of mechanisms in animals ranging from basal invertebrates to vertebrates, including mammals.Animals accomplish genetic diversity through meiosis and fertilization, and during embryogenesis animals must produce specialized cell types, including germ cells, in accordance with their individual body plan. This series of phenomena is essential to the continuity of life in the animal kingdom, and animals show various reproductive and developmental strategies.This volume, comprising four parts, reviews animal kingdom diversity, including reproductive strategies and germ cell differentiation mechanisms (Part 1), sex determination and differentiation (Part2), the mechanisms of fertilization (Part 3), and body axis formation (Part 4). Readers will find descriptions of the reproduction or development of 180 species, 13 phyla, 35 classes, 74 orders, 117 families, and 151 genera in this book. Of particular interest is the diversity of molecules and mechanisms used to achieve the same biological purpose in different animals.Undergraduates, graduate students, and professional scientists who want a deeper understanding of animal reproductive and developmental mechanisms will find this book to be of great value.
Reptile Medicine and Surgery in Clinical Practice
by Robert Johnson Bob Doneley Deborah Monks Brendan CarmelA concise and practical quick reference guide to treating reptiles in first opinion veterinary practice Reptile Medicine and Surgery in Clinical Practice is the ideal guide for the busy veterinarian treating reptile cases. Designed as a quick reference guide, but with comprehensive coverage of all the topics needed for first opinion practice, the book presents the principles of reptile medicine and surgery. Richly illustrated chapters cover anatomy, physiology, behaviour, husbandry, reproduction, common diseases and disorders, and much more. Application in a clinical setting is emphasized throughout, including guidance on the physical examination, diagnostic testing and imaging, treatment options, and anaesthetic and surgical techniques. Practical quick-reference guide—ideal for the busy, first-opinion veterinary practitioner Richly illustrated in full colour throughout Edited by a team of highly experienced exotic animal veterinarians Useful reference for those studying for postgraduate certificates in exotic animal medicine With contributions from experts around the globe, Reptile Medicine and Surgery in Clinical Practice is a valuable reference offering a balanced international view of herpetological medicine.
Reptile and Amphibian Study (Merit Badge Series)
by Boy Scouts of AmericaThis is the pamplet for the Reptile and Amphibian Study merit badge of the Boy Scouts of America. It includes background material, requirements, suggestions for ways of meeting the requirements, and references for finding more information about reptiles and amphibians, including lizards, turtles, tortoises, snakes, crocodiles, alligators, frogs, and salamanders. It could also serve as a starting point for any teenager interested in nature study or raising reptiles or amphibians as pets.
Reptiles (Fountas & Pinnell LLI Blue)
by Melvin Berger Gilda BergerScholastic True or False is a science series aimed at second and third graders in a fun question-and-answer format. Each book contains 22 true or false questions with a full-color photograph of reptiles on every page. Kids will read the question on the right and turn the page to see the answer on the left. Every answer also includes a bonus fact related to the question.
Reptiles (Fountas & Pinnell LLI Blue)
by Melvin Berger Gilda BergerFun, photographic nonfiction at its best from the authors of the successful Question and Answer series. <P><P>Scholastic True or False is a science series aimed at second and third graders in a fun question-and-answer format. Each book contains 22 true or false questions with a full-color photograph of reptiles on every page. Kids will read the question on the right and turn the page to see the answer on the left. Every answer also includes a bonus fact related to the question.
Reptiles (National Geographic Readers)
by Jennifer SzymanskiFind out about snakes, crocodiles, lizards, turtles, and other reptiles in this new co-reader from National Geographic Kids.Learn about your favorite scaly, cold-blooded animals. Find out where they live, what they eat, why they shed their skin, and more.National Geographic readers have been a hit in the beginning reader category, and this book builds upon that success with a new approach--parents and children reading together. With the same combination of careful text, brilliant photographs, and fun approach to high-interest subjects that has proved to be a winning formula with kids, National Geographic Co-readers provide one page of adult read-aloud and one page of kid read-aloud text on each spread, building toward a collaborative reading experience.
Reptiles and Amphibians of Prince Edward County, Ontario
by Peter ChristieReptiles and Amphibians of Price Edward County, Ontario is a comprehensive look at the little-known residents of a well-known corner of rural Ontario. Complete with descriptions and illustrations, the book provides serious and amateur naturalists with a thorough compilation of recent and historic reports of the some thirty species of turtles, snakes, frogs, toads and salamanders that are – or once were – found in this unique part of the province. The text acquaints readers with the likelihood of encountering these fascinating creatures in the area while maps of all known records illustrate where these animals have been uncovered in the past. Discussions of changes in species abundance offer a sense of the shifts that have taken place in reptile and amphibian communities in the area over time.