Actas X Congreso Internacional de Aracnologia, Jaca (España), Septiembre 1986 PDF Download
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Author: J. A. Barrientos
Publisher:
ISBN:
Category : Arachnida
Languages : en
Pages : 104
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Book Description
Author: J. A. Barrientos
Publisher:
ISBN:
Category : Arachnida
Languages : en
Pages : 104
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Book Description
Author: Ricardo Pinto-da-Rocha
Publisher: Harvard University Press
ISBN: 9780674023437
Category : Nature
Languages : en
Pages : 624
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Book Description
The 25 authors provide a much-needed synthesis of what is currently known about these relatives of spiders, focusing on basic conceptual issues in systematics and evolutionary ecology, making comparisons with other well-studied arachnid groups, such as spiders and scorpions. --from publisher description.
Author:
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 1152
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Book Description
Author:
Publisher:
ISBN:
Category : Classification
Languages : en
Pages : 780
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Book Description
Author:
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 486
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Book Description
Author: Janet Leonard
Publisher: Oxford University Press
ISBN: 0195325559
Category : Medical
Languages : en
Pages : 550
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Book Description
Primary sexual traits, those structures and processes directly involved in reproduction, are some of the most diverse, specialized, and bizarre in the animal kingdom. Moreover, reproductive traits are often species-specific, suggesting that they evolved very rapidly. This diversity, long the province of taxonomists, has recently attracted broader interest from evolutionary biologists, especially those interested in sexual selection and the evolution of reproductive strategies.Primary sexual characters were long assumed to be the product of natural selection, exclusively. A recent alternative suggests that sexual selection explains much of the diversity of "primary" sexual characters. A third approach to the evolution of reproductive interactions after copulation or insemination has been to consider the process one of sexual conflict. That is, the reproductive processes of a species may reflect, as does the mating system, evolution acting on males and on females, but in different directions.In this volume, authors explore a wide variety of primary sexual characters and selective pressures that have shaped them, from natural selection for offspring survival to species-isolating mechanisms, sperm competition, cryptic female choice and sexual arms races. Exploring diverse reproductive adaptations from a theoretical and practical perspective, The Evolution of Primary Sexual Characters will provide an unparalleled overview of sexual diversity in many taxa and an introduction to the issues in sexual selection that are changing our view of sexual processes.
Author: Roland Stockmann
Publisher:
ISBN: 9782913688117
Category : Scorpions
Languages : en
Pages : 565
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Book Description
Author: V. Fet
Publisher: Springer Science & Business Media
ISBN: 9401111162
Category : Science
Languages : en
Pages : 654
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Book Description
remnants of gene pools of these species. Badghyz Natural Reserve, established in 1941, became a refuge for the last existing population of the Turkmen onager (Equus hemionus onager) and a unique pistachio woodland. A new generation oflocal Turkmen scientists, many of whom were trained by the Russian researchers in the graduate schools of Moscow and Leningrad arose from the 1930s through the 1950s. The Turkmen Academy of Sciences and its journal, Proceedings (including the monthly biological series), served to record the results of diverse biological studies in the republic. While basic science in the Middle Asian republics rather gained from the Russian "colonial" influence, natural resources, in contrast, were severely damaged by the Soviet way of handling the economy and social issues. Severe environmental problems have been inherited by the now independent Turkmenistan, including overgrazed desert pastures, deforested mountains, depleted water resources, accumulated pesticides in cotton fields, declining populations of endangered species of animals and plants, and - worst of al- progressing, human-caused desertification (Kharin this volume). In order to approach a solution to these problems, scientists and officials in the republic will need the close attention and help of the international scientific community.
Author: Gary A. Polis
Publisher:
ISBN:
Category : Scorpions
Languages : en
Pages : 428
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Book Description
Author: Nentwig
Publisher: CRC Press
ISBN: 9781877743184
Category : Science
Languages : en
Pages : 284
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Book Description
in collaboration with Bruce Cutler and Stefan Heimer The available information, personal observations, and study of one facet of the beauties of the tropical rain forest of Panama is gathered into a much needed volume which includes the physical, biological, and spider environment of Panama. The complete list of known Panama spiders with literature references and a key to the families and most genera provides the user with an up-to-date guide to this fauna. With over 350 illustrations, numerous charts, graphs, and tables, the coverage of this volume goes far beyond the geographical boundary of the study, making it useful to all students of spiders.
