The Status and Distribution of Invasive Crayfishes and Their Effects on Native Crayfish Communities in West Virginia
Author: Casey David Swecker
Publisher:
Published: 2012
Total Pages:
ISBN-13:
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Author: Casey David Swecker
Publisher:
Published: 2012
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Zachary J. Loughman
Publisher: PenSoft Publishers LTD
Published: 2011-01-06
Total Pages: 87
ISBN-13: 9546425702
DOWNLOAD EBOOKThe crayfish fauna of West Virginia consists of 23 species and several undescribed taxa. Most survey efforts documenting this fauna have been conducted in lotic waterways throughout the Appalachian plateau, Allegheny Mountains, and Ridge and Valley physiographic provinces. Bottomland forests, swamps, and marshes associated with large river floodplains such as the Ohio River floodplain historically have been under-surveyed, though these habitats harbor the richest primary burrowing crayfish fauna in West Virginia. The crayfish fauna of West Virginia?s Ohio River floodplain was surveyed from 2004 through 2009.ÿ From this survey, nine species from four genera were documented inhabiting the floodplain. Zoogeography, biology, and conservation status is provided for the nine species encountered in the survey, as well as a review of crayfish collection methods and a dichotomous key to West Virginia Ohio River floodplain crayfish species.
Author: Raymond F. Jezerinac
Publisher:
Published: 1995
Total Pages: 212
ISBN-13:
DOWNLOAD EBOOKAuthor: Frank Joseph Schwartz
Publisher:
Published: 1962
Total Pages: 273
ISBN-13:
DOWNLOAD EBOOKAuthor: Mary Caitlin Massie
Publisher:
Published: 2023
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOK"A few species of branchiobdellidan worms engage in a mutualism with native crayfish hosts. Faxonius cristavarius, an invasive crayfish, is a noncompetent host of branchiobdellidans and will remove any worms that colonize it. The distributions of three native crayfish overlap with F. cristavarius in the North and South Forks of the New River in northwestern North Carolina. If F. cristavarius acts as a sink for these worms, this could reduce the fitness of native crayfish. In a field survey, branchiobdellidan abundance and richness on native Cambarus crayfish declined significantly in response to an increasing relative abundance of F. cristavarius. I also tested whether F. cristavarius caused changes in the abundance of symbiont worms on native Cambarus robustus after subjecting individuals to one of two treatments: 1) a control treatment consisting of a single C. robustus stocked with 5 worms placed with an unstocked C. robustus and 2) an experimental treatment consisting of a single, stocked C. robustus placed with an unstocked F. cristavarius. Significantly fewer worms remained on native crayfish in the presence of F. cristavarius. This research contributes to a greater understanding of potential impacts on populations and communities of native symbionts caused by the introduction of invasive hosts."--Abstract.
Author: Lisa Breithut
Publisher:
Published: 2014
Total Pages: 74
ISBN-13:
DOWNLOAD EBOOKAuthor: Guenter A. Schuster
Publisher: University of Alabama Press
Published: 2022-04-19
Total Pages: 519
ISBN-13: 0817321063
DOWNLOAD EBOOK"This book represents the most in-depth treatment of crayfishes for the state of Alabama to date. Alabama is currently known to host 99 species of crayfishes. The findings in this book are based on more than 9,000 records gathered from across the entire state. The authors collected specimens and data from all of Alabama's major and minor waterways and lakes, as well as specialized habitats such as burrows, roadside ditches, marshes, swamps, and temporary autumnal ponds. They visited all the major museums with holdings of crayfish specimens from Alabama, yielding a list of historical records including 4,259 specimen lots from approximately 2,200 unique locations. These records were used to build a database containing all available specimen metadata, including, but not limited to: species identification, number of individuals collected, location, date of collection, names of collectors, who identified the specimens, and the museum in which they are stored. Field work was conducted over a 14-year period during which a total of 4,487 specimen lots were collected and added to the database from approximately 2,600 unique locations sampled across Alabama. Prior to this book, no single comprehensive book or reference has ever been published on the crayfishes of Alabama. This book compiles 166 years of crayfish distributional and biological data for the 99 known Alabama species. It begins with chapters on the physiography and waterways of Alabama. One chapter discusses the general distributional patterns and habitat associations of Alabama crayfishes. Subsequent chapters discuss crayfish biology, ecology, conservation, and anatomy. Detailed species accounts include descriptions of morphological characters, life color, maximum size, comparative species, distribution and habitat, biology, crayfish associates, and conservation status. Color photographs, morphological plates, and dot maps showing distributions are included for each species; for many species, multiple color photos demonstrate the known color variations within each species. An illustrated key is provided to guide the identification of all 99 species. As the most up-to-date and comprehensive source of information on Alabama crayfishes to date, "Crayfishes of Alabama" provides a new perspective on Alabama's unique place as a biodiversity hotspot. It will be of lasting value to aquatic biologists and ecologists throughout the Southeast and crayfish biologists around the world, as well as of interest to natural resource managers, aquaculture farmers, and naturalists"--
Author: Julian Reynolds
Publisher: Cambridge University Press
Published: 2011-11-10
Total Pages: 399
ISBN-13: 1139502166
DOWNLOAD EBOOKIntegrating research into freshwater biodiversity and the role of keystone species, this fascinating book presents freshwater crayfish as representatives of human-exacerbated threats to biodiversity and conservation. It uses examples from these and other large decapod invertebrates to explore how communities function and are controlled, alongside the implications of human demands and conflicts over limited resources, notably the severe impacts on biodiversity. The discussion is structured around three key topics – the present situation of crayfish in world freshwater ecosystems, the applications of science to conservation management and knowledge transfer for successful crayfish management. It outlines the historic exploitation of crayfish, addressing the problems caused by invasive alien forms and explaining the importance of correct identification when dealing with conservation issues. Offering a global perspective on freshwater systems, the book ultimately highlights how the conservation of such large and long-lived species will help protect ecosystem quality in the future.
Author: Curtis Lakeman Newcombe
Publisher:
Published: 1929
Total Pages: 60
ISBN-13:
DOWNLOAD EBOOKAuthor: Keith Lawrence Sorenson
Publisher:
Published: 2012
Total Pages:
ISBN-13:
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