Selection Against Inbreeding And Outbreeding
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The Natural History Of Inbreeding And Outbreeding
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Author : Nancy Wilmsen Thornhill
language : en
Publisher: University of Chicago Press
Release Date : 1993-08-15
The Natural History Of Inbreeding And Outbreeding written by Nancy Wilmsen Thornhill and has been published by University of Chicago Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-08-15 with Science categories.
Inbreeding, the mating of close kin, and outbreeding, the mating of distant relatives or unrelated organisms, have long been important subjects to evolutionary biologists. Inbreeding reduces genetic diversity in a population, increasing the likelihood that genetic defects will become widespread and deprive a population of the diversity it may need to cope with its environment. Most plants and animals have evolved behavioral and morphological mechanisms to avoid inbreeding. However, today many endangered species exist only in small, very isolated populations where inbreeding is unavoidable, so it has become a concern for conservationists. In this volume, twenty-six experts in evolution, behavior, and genetics examine the causes and consequences of inbreeding. The authors ask whether inbreeding is as problematic as biologists have thought, under what ecological conditions inbreeding occurs, and whether organisms that inbreed have mechanisms to dampen the anticipated problems of reduced genetic variation. The studies, including theoretical and empirical work on wild and captive populations, demonstrate that many plants and animals inbreed to a greater extent than biologists have thought, with variable effects on individual fitness. Graduate students and researchers in evolutionary biology, animal behavior, ecology, and conservation biology will welcome this wide-ranging collection.
Selection Against Inbreeding And Outbreeding
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Author : Bengt Hansson
language : en
Publisher:
Release Date : 1998
Selection Against Inbreeding And Outbreeding written by Bengt Hansson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Inbreeding And Outbreeding
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Author : Edward Murray East
language : en
Publisher:
Release Date : 1919
Inbreeding And Outbreeding written by Edward Murray East and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1919 with Breeding categories.
Inbreeding And Outbreeding Their Genetic And Sociological Significance
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Author : Edward M. East
language : en
Publisher: Holloway Press
Release Date : 2007-10
Inbreeding And Outbreeding Their Genetic And Sociological Significance written by Edward M. East and has been published by Holloway Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-10 with Science categories.
PREFACE. THE Author of this very practical treatise on Scotch Loch - Fishing desires clearly that it may be of use to all who had it. He does not pretend to have written anything new, but to have attempted to put what he has to say in as readable a form as possible. Everything in the way of the history and habits of fish has been studiously avoided, and technicalities have been used as sparingly as possible. The writing of this book has afforded him pleasure in his leisure moments, and that pleasure would be much increased if he knew that the perusal of it would create any bond of sympathy between himself and the angling community in general. This section is interleaved with blank shects for the readers notes. The Author need hardly say that any suggestions addressed to the case of the publishers, will meet with consideration in a future edition. We do not pretend to write or enlarge upon a new subject. Much has been said and written-and well said and written too on the art of fishing but loch-fishing has been rather looked upon as a second-rate performance, and to dispel this idea is one of the objects for which this present treatise has been written. Far be it from us to say anything against fishing, lawfully practised in any form but many pent up in our large towns will bear us out when me say that, on the whole, a days loch-fishing is the most convenient. One great matter is, that the loch-fisher is depend- ent on nothing but enough wind to curl the water, -and on a large loch it is very seldom that a dead calm prevails all day, -and can make his arrangements for a day, weeks beforehand whereas the stream- fisher is dependent for a good take on the state of the water and however pleasant and easy it may be for one living near the banks of a good trout stream or river, it is quite another matter to arrange for a days river-fishing, if one is looking forward to a holiday at a date some weeks ahead. Providence may favour the expectant angler with a good day, and the water in order but experience has taught most of us that the good days are in the minority, and that, as is the case with our rapid running streams, -such as many of our northern streams are, -the water is either too large or too small, unless, as previously remarked, you live near at hand, and can catch it at its best. A common belief in regard to loch-fishing is, that the tyro and the experienced angler have nearly the same chance in fishing, -the one from the stern and the other from the bow of the same boat. Of all the absurd beliefs as to loch-fishing, this is one of the most absurd. Try it. Give the tyro either end of the boat he likes give him a cast of ally flies he may fancy, or even a cast similar to those which a crack may be using and if he catches one for every three the other has, he may consider himself very lucky. Of course there are lochs where the fish are not abundant, and a beginner may come across as many as an older fisher but we speak of lochs where there are fish to be caught, and where each has a fair chance. Again, it is said that the boatman has as much to do with catching trout in a loch as the angler. Well, we dont deny that. In an untried loch it is necessary to have the guidance of a good boatman but the same argument holds good as to stream-fishing...
Encyclopedia Of Rose Science
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Author : Thomas Debener
language : en
Publisher: Academic Press
Release Date : 2003-10-27
Encyclopedia Of Rose Science written by Thomas Debener and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-10-27 with Science categories.
The Encyclopedia of Rose Science brings together a wealth of information on the rose, long treasured for its captivating perfumes and splendid colors. Now, more than ever, science plays a central place in the production of this flower at the center of one of the world's biggest floricultural industries. A team of internationally renowned experts has contributed scores of articles, from the history of rose cultivation to discoveries in rose genetics. For researchers and students, as well as commercial rose growers and breeders, the Encyclopedia of Rose Science is an invaluable reference. The Encyclopedia of Rose Science is available online on ScienceDirect. The print edition price for this reference work does not include online access. For more information on pricing for access to the online edition, please review our Licensing Options. The richness and authority of Elsevier reference works is now lent valuable functionality and accessibility through the online launch of Elsevier Reference Works on ScienceDirect. Features: Extensive browsing and searching across subject, thematic, alphabetical, author and cited author indexes - as applicable to the work Basic and advanced search functionality within volumes, parts of volumes, or across the whole work Ability to build, save and re-run searches as well as combine saved searches Internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy All articles are available as full-text HTML files, and as PDF files that can be viewed, downloaded or printed out in their original print format A dedicated Reference Works navigation tab and homepage on ScienceDirect to enable easy linking from your OPAC or library website For more information about the Elsevier Reference Works on ScienceDirect Program, please visit: http://www.info.sciencedirect.com/reference_works. Presents complete, up-to-date information on over 35 subject areas of major importance to rose scientists Encyclopedic format provides for concise, readable entires, easy searches, and extensive cross-references Incorporates MODERN ROSES XI, published by the American Rose Society as International Cultivar Registration Authority for Roses, the most comprehensive list of roses of historical and botanical importance! High quality full-color production, with many figures and tables
The Effect Of Inbreeding Outbreeding And Selection On Expression Of A Mutant In Drosophila Subobscura
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Author : K. G. Sondhi
language : en
Publisher:
Release Date : 1959
The Effect Of Inbreeding Outbreeding And Selection On Expression Of A Mutant In Drosophila Subobscura written by K. G. Sondhi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with categories.
The Natural History Of Inbreeding And Outbreeding
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Author : Nancy Wilmsen Thornhill
language : en
Publisher: University of Chicago Press
Release Date : 1993-08-15
The Natural History Of Inbreeding And Outbreeding written by Nancy Wilmsen Thornhill and has been published by University of Chicago Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-08-15 with Science categories.
Inbreeding, the mating of close kin, and outbreeding, the mating of distant relatives or unrelated organisms, have long been important subjects to evolutionary biologists. Inbreeding reduces genetic diversity in a population, increasing the likelihood that genetic defects will become widespread and deprive a population of the diversity it may need to cope with its environment. Most plants and animals have evolved behavioral and morphological mechanisms to avoid inbreeding. However, today many endangered species exist only in small, very isolated populations where inbreeding is unavoidable, so it has become a concern for conservationists. In this volume, twenty-six experts in evolution, behavior, and genetics examine the causes and consequences of inbreeding. The authors ask whether inbreeding is as problematic as biologists have thought, under what ecological conditions inbreeding occurs, and whether organisms that inbreed have mechanisms to dampen the anticipated problems of reduced genetic variation. The studies, including theoretical and empirical work on wild and captive populations, demonstrate that many plants and animals inbreed to a greater extent than biologists have thought, with variable effects on individual fitness. Graduate students and researchers in evolutionary biology, animal behavior, ecology, and conservation biology will welcome this wide-ranging collection.
Ascaris
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Author : Celia Holland
language : en
Publisher: Newnes
Release Date : 2013-05-09
Ascaris written by Celia Holland and has been published by Newnes this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-09 with Medical categories.
This book tackles a number of different perspectives concerning the parasitic helminth Ascaris, both in animals and in humans and the disease known as ascariasis. It seeks to identify interesting, exciting and novel aspects, which will interest readers from a broad range of disciplines.Over a quarter of the world's population are infected with the human roundworm, and the equivalent in pigs is equally ubiquitous. Both contribute to insidious and chronic nutritional morbidity, and this has been quantified, in humans, as disability adjusted life years approximating 10.5 million. Ascaris larvae develop in host parenteral tissues, and the resultant pathology has been condemnation. Ascariasis, despite its staggering global prevalence and the sheer numbers of people it infects, remains a classic neglected disease. However, renewed interest in the consequences of early infection with worms from the perspective of immune modulation, co-infections and the development of allergy further enhances the relevance of these parasites. Brings together a wide range of topics and approaches and recent, comprehensive and progressive research concerning the neglected parasite Ascaris Provides a blueprint of how a single parasite entity can stimulate interest in basic biology, clinical science, veterinary science, public health and epidemiology Presents a wealth of new insights given that a book on this parasite has not been published for over 20 years 16 chapters from a range of top authors from around the world
Natural Hybridization And Evolution
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Author : Michael L. Arnold
language : en
Publisher: Oxford University Press
Release Date : 1997-01-30
Natural Hybridization And Evolution written by Michael L. Arnold and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-01-30 with Science categories.
Michael L. Arnold offers an exploration of the evolutionary process of natural hybridisation, and presents data from various sources that support the paradigm of natural hybridisation as an important evolutionary process.
Behaviour Development And Evolution
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Author : Patrick Bateson
language : en
Publisher: Open Book Publishers
Release Date : 2017-02-20
Behaviour Development And Evolution written by Patrick Bateson and has been published by Open Book Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-20 with Science categories.
The role of parents in shaping the characters of their children, the causes of violence and crime, and the roots of personal unhappiness are central to humanity. Like so many fundamental questions about human existence, these issues all relate to behavioural development. In this lucid and accessible book, eminent biologist Professor Sir Patrick Bateson suggests that the nature/nurture dichotomy we often use to think about questions of development in both humans and animals is misleading. Instead, he argues that we should pay attention to whole systems, rather than to simple causes, when trying to understand the complexity of development. In his wide-ranging approach Bateson discusses why so much behaviour appears to be well-designed. He explores issues such as ‘imprinting’ and its importance to the attachment of offspring to their parents; the mutual benefits that characterise communication between parent and offspring; the importance of play in learning how to choose and control the optimal conditions in which to thrive; and the vital function of adaptability in the interplay between development and evolution. Bateson disputes the idea that a simple link can be found between genetics and behaviour. What an individual human or animal does in its life depends on the reciprocal nature of its relationships with the world about it. This knowledge also points to ways in which an animal’s own behaviour can provide the variation that influences the subsequent course of evolution. This has relevance not only for our scientific approaches to the systems of development and evolution, but also on how humans change institutional rules that have become dysfunctional, or design public health measures when mismatches occur between themselves and their environments. It affects how we think about ourselves and our own capacity for change.