Animal science: reproduction, climate, meat, wool , Animal science: reproduction, climate, meat, wool , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
Abstract Scientific research on ‘animal welfare’ began because of ethical concerns over the quality of life of animals, and the public looks to animal welfare research for guidance regarding these concerns. The conception of animal welfare used by scientists must relate closely to these ethical concerns if the orientation of the research and the interpretation of the findings is to address them successfully. At least three overlapping ethical concerns are commonly expressed regarding the quality of life of animals: (1) that animals should lead natural lives through the development and use of their natural adaptations and capabilities, (2) that animals should feel well by being free from prolonged and intense fear, pain, and other negative states, and by experiencing normal pleasures, and (3) that animals should function well, in the sense of satisfactory health, growth and normal functioning of physiological and behavioural systems. Various scientists have proposed restricted conceptions of animal welfare that relate to only one or other of these three concerns. Some such conceptions are based on value positions about what is truly important for the quality of life of animals or about the nature of human responsibility for animals in their care. Others are operational claims: (1) that animal welfare research must focus on the functioning of animals because subjective experiences fall outside the realm of scientific enquiry, or (2) that studying the functioning of animals is sufficient because subjective experiences and functioning are closely correlated. We argue that none of these positions provides fully satisfactory guidance for animal welfare research. We suggest instead that ethical concerns about the quality of life of animals can be better captured by recognizing three classes of problems that may arise when the adaptations possessed by an animal do not fully correspond to the challenges posed by its current environment. (I) If animals possess adaptations that no longer serve a significant function in the new environment, then unpleasant subjective experiences may arise, yet these may not be accompanied by significant disruption to biological functioning. Thus, a bucket-fed calf may experience a strong, frustrated desire to suck, even though it obtains adequate milk. (2) If the environment poses challenges for which the animal has no corresponding adaptation, then functional problems may arise, yet these may not be accompanied by significant effects on subjective feelings. Thus, a pig breathing polluted air may develop lung damage without appearing to notice or mind the problem. (3) Where animals have adaptations corresponding to the kinds of environmental challenges they face, problems may still arise if the adaptations prove inadequate. For example, an animal's thermoregulatory adaptations may be insufficient in a very cold environment such that the animal both feels poorly and functions poorly. We propose that all three types of problems are causes of ethical concern over the quality of life of animals and that they together define the subject matter of animal welfare science.
Animals are biological transformers of dietary matter and energy to produce high-quality foods and wools for human consumption and use. Mammals, birds, fish, and shrimp require nutrients to survive, grow, develop, and reproduce. As an interesting, dynamic, and challenging discipline in biological sciences, animal nutrition spans an immense range from chemistry, biochemistry, anatomy and physiology to reproduction, immunology, pathology, and cell biology. Thus, nutrition is a foundational subject in livestock, poultry and fish production, as well as the rearing and health of companion animals. This book entitled Principles of Animal Nutrition consists of 13 chapters. Recent advances in biochemistry, physiology and anatomy provide the foundation to understand how nutrients are utilized by ruminants and non-ruminants. The text begins with an overview of the physiological and biochemical bases of animal nutrition, followed by a detailed description of chemical properties of carbohydrates, lipids, protein, and amino acids. It advances to the coverage of the digestion, absorption, transport, and metabolism of macronutrients, energy, vitamins, and minerals in animals. To integrate the basic knowledge of nutrition with practical animal feeding, the book continues with discussion on nutritional requirements of animals for maintenance and production, as well as the regulation of food intake by animals. Finally, the book closes with feed additives, including those used to enhance animal growth and survival, improve feed efficiency for protein production, and replace feed antibiotics. While the classical and modern concepts of animal nutrition are emphasized throughout the book, every effort has been made to include the most recent progress in this ever-expanding field, so that readers in various biological disciplines can integrate biochemistry and physiology with nutrition, health, and disease in mammals, birds, and other animal species (e.g., fish and shrimp). All chapters clearly provide the essential literature related to the principles of animal nutrition, which should be useful for academic researchers, practitioners, beginners, and government policy makers. This book is an excellent reference for professionals and a comprehensive textbook for senior undergraduate and graduate students in animal science, biochemistry, biomedicine, biology, food science, nutrition, veterinary medicine, and related fields.
Volume 1: A-D: Foreword. Preface. How to Use the Encyclopedia. Agricultural Experiment Stations. Agroforestry. Air Pollution: Plant Growth and Productivity. Animal Behavior (Ethology). Animal Breeding and Genetics. Animal By-Products from Slaughter. Animal Diseases. Animal Nutrition, Nonruminant. Animal Nutrition, Ruminant. Animal Reproduction, An Overview of the Reproductive System. Animal Reproduction, Male. Animal Reproduction, Nonpregnant Female. Animal Reproduction, Pregnancy, Animal Waste Management. Apiculture. Bananas. Barley. Beef Cattle Production. Berries. Biomass. Biotechnology and Biological Sciences Research Council, United Kingdom. Brewing Technology. Cabbage and Cole Crops. Carbohydrates, Role in Human Nutrition. Christmas Tree Production. Citrus Fruits. Cocoa. Computer Applications in Agriculture. Consultative Group on International Agricultural Research. Cooperative Extension System. Cooperatives. Corn Crop Production. Corn Genetics and Breeding. Corn Processing and Utilization. Cotton Crop Production. Cotton Processing and Utilization. Crop Subsidies. Cultivar Development. Dairy Cattle Production. Dairy Processing and Products. Deciduous Fruit Trees. Desertification of Drylands. Dormancy. Draft Animal Power. Dryland Farming. Volume 2: E-L: Edible Tree Nuts: Pecan and Other Hickories. Edible Tree Nuts, Walnuts. Education: Children and Youth. Education: Undergraduate and Graduate University. Egg Production, Processing, and Products. Embryo Transfer in Domestic Animals. Energy Utilization. Entomology, Horticultural. Entomology, Veterinary. Environmental Horticulture. Ethics. Evolution of Domesticated Plants. Farming Systems. Fats and Cholesterol, Role in Human Nutrition. Feeds and Feeding. Fertilizer Management and Technology. Finance. Floriculture. Food Biochemistry: Lipids, Carbohydrates, and Nucleic Acids. Food Biochemistry: Pigments, Flavors, Aromas, and Stability. Food Biochemistry: Proteins, Enzymes, and Enzyme Inhibitors. Food Chemistry. Food Composition. Food Dehydration. Food Irradiation. Food Marketing Systems. Food Microbiology. Food Packaging. Food Preservatives. Food Process Engineering: Heat and Mass Transfer. Food Process Engineering: Storage and Transport of Fluid Foods in Plants. Food Process Engineering: Thermodynamic and Transport Properties. Food Toxicology. Forages. Forest Ecology. Forest Tree, Genetic Improvement. Fungicides. Goat Production. Government Agricultural Policy, United States. Grain, Feed, and Crop Storage. Ground Water. Herbicides and Herbicide Resistance. Heterosis. Horse Industry: Trends, Opportunities, and Issues. Horticultural Greenhouse Engineering. Insect Physiology. Integrated Pest Management. International Agricultural Research. Irrigation Engineering, Evapotranspiration. Irrigation Engineering: Farm Practices, Methods, and Systems. Irrigation in Humid Regions. Labor. Lactation. Land Use Planning in Agriculture. Livestock Pests. Volume 3: M-R: Macroeconomics of World Agriculture. Measurement of Micro-oxygen Supply and Demand. Meat Processing. Melons: Biochemical and Physiological Control of Sugar Accumulation. Meteorology. Microclimate. Minerals, Role in Human Nutrition. Natural Rubber Production in Arid and Semiarid Zones. Nematicides. Nitrogen Cycling. Oat. Orchard Management: Soil Environment and Resources. Orchard Management Systems. Peanuts. Pest Management, Biological Control. Pest Management, Chemical Control. Pest Management, Cultural Control. Photosynthesis. Plant Biochemistry. Plant Biotechnology: Food Safety and Environmental Issues. Plant Cytology, Modern Techniques. Plant Cytoskeleton. Plant Ecology. Plant Gene Mapping. Plant Genetic Enhancement. Plant Genetic Resource Conservation and Utilization. Plant Genetic Resources. Plant Pathology. Plant Physiology. Plant Propagation. Plant Stress. Plant Tissue Culture. Plant Virology. Popcorn. Postharvest Physiology. Potato. Poultry Processing and Products. Poultry Production. Prices. Production Economics. Quantitative Methods in Agricultural Economics. Rabbit Production. Rangeland. Rangeland Condition and Trend. Rangeland Ecology. Rangeland Grass Improvement. Rangeland Grazing. Rangeland Management and Planning. Rangeland Plants. Rangeland Shrubs. Rangeland Soils. Rangeland Watershed Management. Rice Genetics and Breeding. Rice Processing and Utilization. Root and Tuber Crops. Rural Development, International. Rural Sociology. Volume 4: S-W, Index: Silk Production and Processing. Silviculture. Soil, Acid. Soil and Land Use Surveys. Soil and Water Management and Conservation. Soil, Chemicals: Movement and Retention. Soil Chemistry. Soil Drainage. Soil Fertility. Soil Genesis, Morphology, and Classification. Soil Management. Soil Microbiology. Soil Pollution. Soil Testing for Plant Growth and Soil Fertility. Soil-Water Relationships. Sorghum. Soybean Genetics and Breeding. Soybean Production. Structures. Sugarbeet. Sugarcane. Sustainable Agriculture. Swine Production. Tariffs and Trade. Tea. Temperate Hardwoods. Thermal Processing: Canning and Pasteurization. Tillage Systems. Tobacco. Tomato Production in Protected Cultivation. Transgenic Animals. Transposable Elements in Plants. Tropical and Subtropical Fruit. Tropical Grasslands. Tropical Pasture Development. Tropical Rain Forests: Hydrology and Climate. Turfgrasses. U.S. Department of Agriculture: A National System of Agricultural Research. U.S.Farms: Changing Size and Structure. Viticulture. Waste Management Engineering. Water: Control and Use. Water Resources. Weed Science. Wetlands and Riparian Areas: Economics and Policy. Wheat Breeding and Genetics. Wheat Processing and Utilization. Wildlife Management. Women in Agriculture. Wood Properties. Wool and Mohair Production and Processing. World Hunger and Food Security. Appendix A: United States Colleges and Universities Offering Academic Programs in Agriculture. Appendix B: United Nations Agricultural and Other Related Organizations. Contributors. Subject Index. Index of Related Titles.
In the last two decades, the widespread application of genetic and genomic approaches has revealed a bacterial world astonishing in its ubiquity and diversity. This review examines how a growing knowledge of the vast range of animal-bacterial interactions, whether in shared ecosystems or intimate symbioses, is fundamentally altering our understanding of animal biology. Specifically, we highlight recent technological and intellectual advances that have changed our thinking about five questions: how have bacteria facilitated the origin and evolution of animals; how do animals and bacteria affect each other's genomes; how does normal animal development depend on bacterial partners; how is homeostasis maintained between animals and their symbionts; and how can ecological approaches deepen our understanding of the multiple levels of animal-bacterial interaction. As answers to these fundamental questions emerge, all biologists will be challenged to broaden their appreciation of these interactions and to include investigations of the relationships between and among bacteria and their animal partners as we seek a better understanding of the natural world.
Written and edited by a distinguished team of experts, this encyclopedia encompasses animal physiology; animal growth and development; animal behavior; animal reproduction and breeding; alternative approaches to animal maintenance; meat science and muscle biology; farmed animal welfare and bioethics; and food safety. Organized with reader-friendly descriptions of technologies, the second edition consists of more than 300 entries--many of which are new--ranging from adaptation and stress, to zoos and aquariums. With 2500 references and hundreds of figures, equations, and tables, it covers new developments in genomics, transgenesis, cloning, and mathematical model constructions--
The objectives of this paper are to provide an introduction to meta-analysis and systematic review and to discuss the rationale for this type of research and other general considerations. We highlight methods used to produce a rigorous meta-analysis and discuss some aspects of interpretation of meta-analysis drawing on examples from the animal and veterinary science literature. Meta-analysis is a rapidly expanding area of research that has been relatively underutilized in animal and veterinary science. It is a quantitative, formal, epidemiological study design used to systematically assess previous research studies to derive conclusions about that body of research. Outcomes from a meta-analysis may include a more precise estimate of the effect of treatment or risk factor for disease, or other outcomes, than any individual study contributing to the pooled analysis. The examination of variability or heterogeneity in study results is also a critical outcome. The benefits of meta-analysis include a consolidated and quantitative review of a large, and often complex, sometimes apparently conflicting, body of literature. Meta-analytic methods place less emphasis on dichotomous outcomes from null hypothesis significance testing and greater emphasis on determining the magnitude and the precision of an effect of interest. A substantial benefit of meta-analysis is the potential to investigate new hypotheses using existing data, both through the development of a priori hypotheses and by examination of the heterogeneity in study responses. The specification of the outcome and hypotheses that are tested is critical to the conduct of meta-analyses, as is a sensitive literature search. A failure to identify the majority of existing studies can lead to erroneous conclusions; however, there are methods of examining data to identify the potential for studies to be missing; for example, by the use of funnel plots. Many of the statistical methods to conduct meta-analysis are widely used. Bayesian methods are well suited to meta-analysis. The post-hoc methods used to evaluate heterogeneity and publication bias, which include the I (2) statistic, L'Abbé plots, Galbraith plots, Rosenthal's N, and influential study analysis are exclusively used in meta-analysis. Examples where meta-analyses have been repeated in animal science or veterinary medicine show good consistency in estimates of effect. Findings of studies to date have provided new understandings of rumen modifiers, milk fever, parasite control, mastitis, somatotropin, and reproductive manipulations. Rigorously conducted meta-analyses are useful tools to improve animal well-being and productivity. The need to integrate findings from many studies ensures that meta-analytic research is desirable and the large body of research now generated makes the conduct of this research feasible.
The increase in the consumption of animal products is likely to put further pressure on the world’s freshwater resources. This paper provides a comprehensive account of the water footprint of animal products, considering different production systems and feed composition per animal type and country. Nearly one-third of the total water footprint of agriculture in the world is related to the production of animal products. The water footprint of any animal product is larger than the water footprint of crop products with equivalent nutritional value. The average water footprint per calorie for beef is 20 times larger than for cereals and starchy roots. The water footprint per gram of protein for milk, eggs and chicken meat is 1.5 times larger than for pulses. The unfavorable feed conversion efficiency for animal products is largely responsible for the relatively large water footprint of animal products compared to the crop products. Animal products from industrial systems generally consume and pollute more ground- and surface-water resources than animal products from grazing or mixed systems. The rising global meat consumption and the intensification of animal production systems will put further pressure on the global freshwater resources in the coming decades. The study shows that from a freshwater perspective, animal products from grazing systems have a smaller blue and grey water footprint than products from industrial systems, and that it is more water-efficient to obtain calories, protein and fat through crop products than animal products.
The International Journal of Plant, Animal and Environmental Sciences [IJPAES] is a peer reviewed multi-disciplinary an online international journal to promote all fields of Anatomy, Agronomy, Ecology, Biodiversity, Pathology, Entomology, Forest biology Economic Botany, Morphology, Cell and Tissue Culture, Genetics, Phytochemistry, Paleobotany, Horticulture, Cell biology, Molecular Biology, EcoPhysiology, Conservation Biology, Reproductive Biology, Taxonomy, Palaeontology, Anthropology, Biochemistry, Biotechnology, Microbiology, Proteomics, Genomics, Immunology, Pathology, Mammalogy, Nemotalogy, Helminthology, Paracytology, Virology, Mycology, Bacteriology, Animal Breeding, Behavior reproduction, Husbandry, Meat Science, Cloning, Nutrition, Health and Welfare, Environmental Sciences, Environmental chemistry, Environmental Biology, Ecology, Geosciences, Abatement technology, Environmental Physics, Aquatic Environment, Polloution, Environmental health study, Natural resources, Toxicology, Environment, Climate change, Remote sensing Human Biology, Stem Cells, Evolutionary Biology, Endocrinology, Endangered Plants, Immunopathology and Hydrology. IJPAES welcomes research articles, review articles, short communications from Scientists, Biologists and Research scholars involved in Plant, Animal and Environmental Sciences and all other related areas from all over the world to publish high quality and refereed papers.
Life: Its Origins and Evolution - PART ONE: THE CELL - Life and Chemistry: Small Molecules - Life and Chemistry: Large Molecules - Cells: The Basic Units of Life - Cellular Membranes - Energy, Enzymes, and Metabolism - Cellular Pathways that Harvest Chemical Energy - Photosynthesis: Energy from the Sun - PART TWO: INFORMATION AND HEREDITY - Chromosomes, the Cell Cycle, and Cell Division - Transmission Genetics: Mendel and Beyond - DNA and its Role in Heredity - From DNA to Protein: Genotype to Phenotype - The Genetics of Viruses and Prokaryotes - The Eukaryotic Genome and its Expression - Cell Signaling and Gene Expression - Recombinant DNA and Biotechnology - Molecular Biology and Medicine - Natural Defenses against Disease - PART THREE: DEVELOPMENT - Differential Gene Expression in Development - Animal Development: From Genes to Organism - Development and Evolutionary Change - PART FOUR: EVOLUTIONARY PROCESSES - The History of Life on Earth - The Mechanisms of Evolution - Species and their Formation - Constructing and Using Phylogenies - Molecular and Genomic Evolution - PART FIVE: THE EVOLUTION OF DIVERSITY - Bacteria and Archaea: The Prokaryotic Domains - Protists and the Dawn of the Eukarya - Plants without Seeds: From Sea to Land - The Evolution of Seed Plants - Fungi: Recyclers, Killers, and Plant Partners - Ancestors and Lophotrochozoans - Ecdysozoans: The Molting Animals - Deuterostomate Animals - PART SIX: THE BIOLOGY OF FLOWERING PLANTS - The Plant Body - Transport in Plants - Plant Nutrition - Plant Growth Regulation - Reproduction in Flowering Plants - Plant Responses to Environmental Challenges - PART SEVEN: THE BIOLOGY OF ANIMALS - Physiology, Homeostasis, and Temperature Regulation - Animal Hormones - Animal Reproduction - Neurons and Nervous Systems - Sensory Systems - The Mammalian Nervous System: Structure and Higher Functions - Effectors - Gas Exchange in Animals - Circulatory Systems - Animal Nutrition - Salt and Water Balance and Nitrogen Excretion - Animal Behavior - PART EIGHT: ECOLOGY AND BIOGEOGRAPHY - Behavioral Ecology - Population Ecology - Community Ecology - Biogeography - Conservation Biology - Earth Systems Science
Throughout its 25-year history, the Five Domains Model for animal welfare assessment has been regularly updated to include at each stage the latest authenticated developments in animal welfare science thinking. The domains of the most up-to-date Model described here are: 1 Nutrition, 2 Physical Environment, 3 Health, 4 Behavioural Interactions and 5 Mental State. The first four domains focus attention on factors that give rise to specific negative or positive subjective experiences (affects), which contribute to the animal's mental state, as evaluated in Domain 5. More specifically, the first three domains focus mainly on factors that disturb or disrupt particular features of the body's internal stability. Each disturbed or disrupted feature generates sensory inputs which are processed by the brain to form specific negative affects, and these affects are associated with behaviours that act to restore the body's internal stability. As each such behaviour is essential for the survival of the animal, the affects associated with them are collectively referred to as "survival-critical affects". In contrast, Domain 4, now named Behavioural Interactions, focusses on evidence of animals consciously seeking specific goals when interacting behaviourally with (1) the environment, (2) other non-human animals and (3) as a new feature of the Model outlined here, humans. The associated affects, evaluated via Domain 5, are mainly generated by brain processing of sensory inputs elicited by external stimuli. The success of the animals' behavioural attempts to achieve their chosen goals is reflected in whether the associated affects are negative or positive. Collectively referred to as "situation-related affects", these outcomes are understood to contribute to animals' perceptions of their external circumstances. These observations reveal a key distinction between the way survival-critical and situation-related affects influence animals' aligned behaviours. The former mainly reflect compelling motivations to engage in genetically embedded behavioural responses, whereas the latter mainly involve conscious behavioural choices which are the hallmarks of agency. Finally, numerous examples of human-animal interactions and their attendant affects are described, and the qualitative grading of interactions that generate negative or positive affect is also illustrated.
Reproductive issues from sex and contraception to abortion and cloning have been controversial for centuries, and scientists who attempted to turn the study of reproduction into a discipline faced an uphill struggle. Adele Clarke's engrossing story of the search for reproductive knowledge across the twentieth century is colorful and fraught with conflict. Modern scientific study of reproduction, human and animal, began in the United States in an overlapping triad of fields: biology, medicine, and agriculture. Clarke traces the complicated paths through which physiological approaches to reproduction led to endocrinological approaches, creating along the way new technoscientific products from contraceptives to hormone therapies to new modes of assisted conception--for both humans and animals. She focuses on the changing relations and often uneasy collaborations among scientists and the key social worlds most interested in their work--major philanthropists and a wide array of feminist and medical birth control and eugenics advocates--and recounts vividly how the reproductive sciences slowly acquired standing. By the 1960s, reproduction was disciplined, and the young and contested scientific enterprise proved remarkably successful at attracting private funding and support. But the controversies continue as women--the targeted consumers--create their own reproductive agendas around the world. Elucidating the deep cultural tensions that have permeated reproductive topics historically and in the present, Disciplining Reproduction gets to the heart of the twentieth century's drive to rationalize reproduction, human and nonhuman, in order to control life itself.
This volume traces the complicated paths through which physiological approaches to reproduction led to endocrinological approaches, creating along the way new technoscientific products from contraceptives to hormone therapies to new modes of assisted conception - for both humans and animals. The author focuses on the changing relations and often uneasy collaborations among scientists and the key social worlds most interested in their work - major philanthropists and a wide array of feminist and medical birth control and eugenics advocates - and recounts how the reproductive sciences slowly acquired standing.
Humans routinely make many decisions collectively, whether they choose a restaurant with friends, elect political leaders or decide actions to tackle international problems, such as climate change, that affect the future of the whole planet. We might be less aware of it, but group decisions are just as important to social animals as they are for us. Animal groups have to collectively decide about communal movements, activities, nesting sites and enterprises, such as cooperative breeding or hunting, that crucially affect their survival and reproduction. While human group decisions have been studied for millennia, the study of animal group decisions is relatively young, but is now expanding rapidly. It emerges that group decisions in animals pose many similar questions to those in humans. The purpose of the present issue is to integrate and combine approaches in the social and natural sciences in an area in which theoretical challenges and research questions are often similar, and to introduce each discipline to the other's key ideas, findings and successful methods. In order to make such an introduction as effective as possible, here, we briefly review conceptual similarities and differences between the sciences, and provide a guide to the present issue.
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We attempted a complete review of the empirical literature on effects of roads and traffic on animal abundance and distribution. We found 79 studies, with results for 131 species and 30 species groups. Overall, the number of documented negative effects of roads on animal abundance outnumbered the number of positive effects by a factor of 5; 114 responses were negative, 22 were positive, and 56 showed no effect. Amphibians and reptiles tended to show negative effects. Birds showed mainly negative or no effects, with a few positive effects for some small birds and for vultures. Small mammals generally showed either positive effects or no effect, mid-sized mammals showed either negative effects or no effect, and large mammals showed predominantly negative effects. We synthesized this information, along with information on species attributes, to develop a set of predictions of the conditions that lead to negative or positive effects or no effect of roads on animal abundance. Four species types are predicted to respond negatively to roads: (i) species that are attracted to roads and are unable to avoid individual cars; (ii) species with large movement ranges, low reproductive rates, and low natural densities; and (iii and iv) small animals whose populations are not limited by road-affected predators and either (a) avoid habitat near roads due to traffic disturbance or (b) show no avoidance of roads or traffic disturbance and are unable to avoid oncoming cars. Two species types are predicted to respond positively to roads: (i) species that are attracted to roads for an important resource (e.g., food) and are able to avoid oncoming cars, and (ii) species that do not avoid traffic disturbance but do avoid roads, and whose main predators show negative population-level responses to roads. Other conditions lead to weak or non-existent effects of roads and traffic on animal abundance. We identify areas where further research is needed, but we also argue that the evidence for populationlevel effects of roads and traffic is already strong enough to merit routine consideration of mitigation of these effects in all road construction and maintenance projects.
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Abstract Why do dogs wag their tails and cats purr? Why do we get embarrassed, and why does embarrassment make us blush? Why do we frown when we're disappointed? These any many other questions about the emotional life of humans and animals are answered in this remarkable book. The Expression of the Emotions in Man and Animals was an immediate best-seller when it was first published in 1872 and still provides the point of departure for research into emotion and facial expression. In his study of infants and children (including delightful observations of his own baby's smiles and pouts), of the insane, of painting and sculpture, of cats and dogs and monkeys, and of the ways that people in different cultures express their feelings, Darwin's insights have not been surpassed by modern science. This definitive edition contains a substantial new Introduction and Afterword by Paul Ekman. Ekman also provides commentaries that use the latest scientific knowledge to elaborate, support, and occasionally challenge Darwin's study. When it originally appeared, this was the first scientific book to contain photographic reproductions. For this edition, Ekman has returned to Darwin's original notes in order to produce, for the first time, a corrected, authoritative text illustrated by drawings and photographs positioned exactly as its author intended. The Expression of Emotion in Man and Animals reminds us that, in addition to being the nineteenth century's most influential thinker, Darwin was also a writer of consummate skill. Beautifully and profusely illustrated, and filled with insights that immediately ring true, this new edition promises to delight and enthrall a new generation of readers.