Download or read book The Evolutionary Significance of Wild Hybridization in South African Highveld Ducks written by P. le S. Milstein and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Avian Hybrids of the World written by Eugene M. McCarthy and published by Oxford University Press. This book was released on 2006-02-16 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 5,000 works cited, Handbook of Avian Hybrids of the World is the greatest compendium of information ever published on hybridization in birds. Worldwide in scope, it provides information on all reported avian crosses, not only those occurring in captivity, but also in a natural setting (approximately 4,000 crosses are covered). This book is a basic reference, intended both for the serious birder and the professional biologist. McCarthy's work fills a need for reference material that takes into account the last half century of data. It will be of interest to workers in a wide variety of fields, ranging from animal behavior to genetics, ecology, zoology, and systematics. In fact, it will make fascinating reading for anyone interested in birds and the natural world.
Download or read book Wildlife Review written by and published by . This book was released on 1980 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sperm Competition and the Evolution of Animal Mating systems written by Robert L. Smith and published by Elsevier. This book was released on 2012-12-02 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sperm Competition and the Evolution of Animal Mating Systems describes the role of sperm competition in selection on a range of attributes from gamete morphology to species mating systems. This book is organized into 19 chapters and begins with the conceptualization of sperm competition as a subset of sexual selection and its implications for the insects. The following chapter describes the relationship between multiple mating and female fitness, with an emphasis on determining the conditions under which selection on females is likely to counteract selection on males for avoiding sperm competition. Other chapters consider the female perspective on sperm competition; the evolutionary causation at the level of the individual male gamete; and the correlation of high paternal investment and sperm precedence in the insects. The remaining chapters are arranged phylogenetically and explore the sperm competition in diverse animal taxa, such as the Drosophila, Lepidoptera, spiders, amphibians, and reptiles. These chapters also cover the evolution of direct versus indirect sperm transfer among the arachnids or the problem for kinship theory presented by multiple mating and sperm competition in the Hymenoptera. This book further discusses the remarkable potential for sperm competition among certain temperate bat species whose females store sperm through winter hibernation and the mixed strategies and male-caused female genital trauma as possible sperm competition adaptations in poeciliid fishes. The concluding chapter examines the predictions concerning testes size and mating systems in the primates and the possible role of sperm competition in human selection. This book is of great value to reproductive biologists and researchers.
Download or read book Sexual Selection written by Malte Andersson and published by Princeton University Press. This book was released on 2019-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bright colors, enlarged fins, feather plumes, song, horns, antlers, and tusks are often highly sex dimorphic. Why have males in many animals evolved more conspicuous ornaments, signals, and weapons than females? How can such traits evolve although they may reduce male survival? Such questions prompted Darwin's perhaps most scientifically controversial idea--the theory of sexual selection. It still challenges researchers today as they try to understand how competition for mates can favor the variety of sex-dimorphic traits. Reviewing theoretical and empirical work in this very active field, Malte Andersson, a leading contributor himself, provides a major up-to-date synthesis of sexual selection. The author describes the theory and its recent development; examines models, methods, and empirical tests; and identifies many unsolved problems. Among the topics discussed are the selection and evolution of mating preferences; relations between sexual selection and speciation; constraints on sexual selection; and sex differences in signals, body size, and weapons. The rapidly growing study of sexual selection in plants is also reviewed. This volume will interest students, teachers, and researchers in behavioral ecology and evolutionary biology.
Download or read book The Birds of Africa Volume I written by and published by Bloomsbury Publishing. This book was released on 2020-06-25 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Universally recognised as by far the most authoritative work ever published on the subject, The Birds of Africa is a superb multi-contributor reference work, with encyclopaedic species texts, stunning paintings of all species and numerous subspecies, hundreds of informative line drawings, detailed range maps, and extensive bibliographies. Each volume contains an Introduction that brings the reader up to date with the latest developments in African ornithology, including the evolution and biogeography of African birds. Diagnoses of the families and genera, often with superspecies maps, are followed by the comprehensive species accounts themselves. These include descriptions of range and status, field characters, voice, general habits, food, and breeding habits. Full bibliographies, acoustic references, and indexes complete this scholarly work of reference. This first volume in the series deals comprehensively with Ostrich, albatrosses, petrels and shearwaters, storm-petrels, penguins, divers, grebes, tropicbirds, boobies, cormorants, darter, pelicans, frigatebirds, herons, Hamerkop, storks, Shoebill, ibises and spoonbills, flamingos, swans, geese and ducks, and diurnal birds of prey. The editors and artists have worked closely with other authors - all acknowledged experts in their field - to produce a superb reference in which comprehensive texts on every species are complemented by accurate and detailed paintings and drawings of the birds themselves.
Download or read book The Ostrich written by and published by . This book was released on 1979 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1976 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ducks Geese and Swans of Africa and Its Outlying Islands written by Neville Brickell and published by . This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Partial Proceedings of the Gamebird Symposium Held in Pretoria 9 11 1984 written by P. le S. Milstein and published by . This book was released on 1987 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Male Reproductive Strategies in a Wild Population of Mallards Anas Platyrhynchos written by Susan Evarts and published by . This book was released on 1990 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book African Wetlands and Shallow Water Bodies written by Bryan Robert Davies and published by IRD Editions. This book was released on 1988 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 1990 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Altitude Tropical Biogeography written by François Vuilleumier and published by . This book was released on 1986 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Altitude Tropical Biogeography provides research workers and academics with a comprehensive overview of the biogeography of high tropical mountains, covering the origin, ecology, and evolution of plants and animals of this unique ecological zone. The climate in the high altitude mountain regions of the tropics is cold, resulting in flora and fauna which more closely resemble their counterparts thousand of miles to the north or south than comparable species in the lowland jungles only a few thousand meters below. These ecological "islands", besides being very important to the economies of the tropics, pose interesting questions of physiological adaptation, biogeography, and evolutionary relationships. With contributions from twenty-four international specialists who have devoted years to the study of cold mountain tropics, this book describes some of the most characteristic plant and animal components of the ecosystem. No other book of this scope and content exists on these tropical biotas.
Download or read book Key word index of Wildlife Research written by and published by . This book was released on 1982 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Invasions in South Africa written by Brian W. van Wilgen and published by Springer Nature. This book was released on 2020-03-10 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access volume presents a comprehensive account of all aspects of biological invasions in South Africa, where research has been conducted over more than three decades, and where bold initiatives have been implemented in attempts to control invasions and to reduce their ecological, economic and social effects. It covers a broad range of themes, including history, policy development and implementation, the status of invasions of animals and plants in terrestrial, marine and freshwater environments, the development of a robust ecological theory around biological invasions, the effectiveness of management interventions, and scenarios for the future. The South African situation stands out because of the remarkable diversity of the country, and the wide range of problems encountered in its varied ecosystems, which has resulted in a disproportionate investment into both research and management. The South African experience holds many lessons for other parts of the world, and this book should be of immense value to researchers, students, managers, and policy-makers who deal with biological invasions and ecosystem management and conservation in most other regions.
