The Mayfly Nymphs (Insecta: Ephemeroptera) of the Guadalupe River Basin, Texas
Author: Michael Stahl Peters
Publisher:
Published: 1977
Total Pages: 168
ISBN-13:
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Author: Michael Stahl Peters
Publisher:
Published: 1977
Total Pages: 168
ISBN-13:
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Publisher:
Published: 1997
Total Pages: 368
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DOWNLOAD EBOOKAuthor: Janet Harker
Publisher: Richmond Publishing Limited
Published: 1989
Total Pages: 76
ISBN-13:
DOWNLOAD EBOOKAuthor: Malcolm Knopp
Publisher:
Published: 1997
Total Pages: 396
ISBN-13:
DOWNLOAD EBOOKThe new Bible on mayflies explains everything about the major species and is enhanced by numerous drawings, photos, charts, graphs, and an attractive layout.
Author: John Malcolm Elliott
Publisher:
Published: 2010
Total Pages: 152
ISBN-13: 9780900386787
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Publisher:
Published: 1983
Total Pages: 80
ISBN-13:
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Publisher:
Published: 1980
Total Pages: 1600
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DOWNLOAD EBOOKAuthor: Rudolph A. Rosen
Publisher: Texas A&M University Press
Published: 2014-11-19
Total Pages: 218
ISBN-13: 1623492270
DOWNLOAD EBOOKThis classroom resource provides clear, concise scientific information in an understandable and enjoyable way about water and aquatic life. Spanning the hydrologic cycle from rain to watersheds, aquifers to springs, rivers to estuaries, ample illustrations promote understanding of important concepts and clarify major ideas. Aquatic science is covered comprehensively, with relevant principles of chemistry, physics, geology, geography, ecology, and biology included throughout the text. Emphasizing water sustainability and conservation, the book tells us what we can do personally to conserve for the future and presents job and volunteer opportunities in the hope that some students will pursue careers in aquatic science. Texas Aquatic Science, originally developed as part of a multi-faceted education project for middle and high school students, can also be used at the college level for non-science majors, in the home-school environment, and by anyone who educates kids about nature and water. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Author: Kenneth J. Tennessen
Publisher: Springer
Published: 2019-03-11
Total Pages: 627
ISBN-13: 3319977768
DOWNLOAD EBOOKThis monograph is the first of its kind devoted entirely to the dragonfly nymphs of North America north of Mexico, the focus being accurate identification of the 330 species of Anisoptera that occur in the region. Nymphal external morphology is described and illustrated in detail, and all terms needed to navigate the dichotomous keys are defined. Species are tabulated with references that provide the most detailed, accurate descriptions for each; species that are inadequately described are so indicated. The key separating the seven families in the region contains several new characters. The families are then covered separately: Aeshnidae (13 genera), Gomphidae (17 genera), Petaluridae (2 genera), Cordulegastridae (2 genera), Macromiidae (2 genera), Corduliidae (7 genera), and Libellulidae (29 genera). Each family is further characterized, followed by a generic key. A drawing of the habitus and diagnostic details for each genus are provided, along with additional diagnostic remarks and notes on habitat and life cycle; for each genus, a map shows its geographic distribution in North America. Full-grown nymphs of all known species of each genus are keyed and diagnosed; characters that apply to earlier instars are noted. Morphological variation in character states was analyzed in order to assess the reliability of previously utilized characters and to discover new characters. Most of the characters used to distinguish all levels of taxa are illustrated; a total of 702 figures, comprising 1,800 original drawings, along with selected photographs where necessary for clarity, accompany the keys. Measurements of total length, head width, and other variables for each species are provided in tables. Difficulties with past keys and descriptions, including errors, omissions and other shortcomings, are addressed. The importance of nymph characters in helping solve generic and specific distinctions and their role in phylogenetic studies is emphasized. Methods for collecting, rearing, and preserving dragonfly nymphs and exuviae are presented. The final chapter discusses research opportunities on North American Anisoptera nymphs, including taxonomic needs, studies on structure and function, life history and microhabitat, water quality indices and conservation efforts. The habitus drawings of all genera are arranged according to family in five plates (Appendix I); although the book is intended as a lab manual, these plates conveniently allow for comparison based on nymph shape making field identification to genus possible in many cases. Appendix II contains a brief history of dragonfly nymph studies in North America. A glossary and an index to scientific names are included.
Author: Sue Wells
Publisher:
Published: 1983
Total Pages: 696
ISBN-13:
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