Effects Of Contaminants On Naiad Mollusks Unionidae
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Effects of Contaminants on Naiad Mollusks (Unionidae) by Marian E. Havlik,Leif L. Marking Pdf
Although the uptake, storage, and elimination of contaminants by naiad mollusks has been studied, relatively little information is available on toxicity. Contaminants appear to have destroyed some populations directly by exerting toxic effects, or indirectly by causing or contributing to the elimination of essential food organisms or host fish. Often two or more factors appear to work in combination to producethe total stress that adversel affects populations. Naiad mollusks are important indicators of contaminants in the environment; residues in soft tissue indicate recent or current exposure, and residues in shells indicate past exposure.
Freshwater Bivalve Ecotoxicology by Jerry L. Farris,John H. Van Hassel Pdf
Responding to the growing need for an aggressive yet conservative approach to evaluating mussel populations, Freshwater Bivalve Ecotoxicology provides a collective review of the techniques and approaches for assessing contaminant impact on freshwater ecosystems. The editors incorporate coverage of research topics and management issues from a cross-section of scientists in the field. They explore current advances in general monitoring of population responses to stressors, fundamental concepts of ecotoxicology specific to burrowing bivalves, and useful insights that offer direction and priority for resolving specific problems challenging protection and conservation efforts. This book lays the groundwork with discussions of topics such as impact assessment, toxicokinetics, biomarkers, and pollution tolerance. The authors then explore fundamental concepts surrounding responses measured in freshwater bivalves as a consequence of chemical exposures or accumulated contaminants in target organs or tissues. They highlight the difficulties encountered with the laboratory culture of these organisms for toxicity testing or other controlled experiments, and examine the use of surrogate test organisms to relate sensitivities of response and reduce pressure on already impacted fauna. The book also reviews innovative field research using in situ bivalve toxicity testing, discusses effects-oriented tissue contaminant assessment, and concludes with threefour specific laboratory or combined field/laboratory ecotoxicology studies. A summary of methods from more than 75 laboratory toxicity studies conducted with freshwater mussels, the book provides an overview of a standardized method for conducting water-only acute and chronic laboratory toxicity tests with glochidia juvenile freshwater mussels. It focuses on studies that report measured contaminant treatments, had robust experimental designs, including replication of control and contaminant treatments, and were published in the peer-reviewed literature. The resulting array of viewpoints provides a framework that can be used to establish priorities in the rehabilitation and management of freshwater ecosystems.
Freshwater Mussels of Texas by Robert G. Howells,Raymond W. Neck,Harold D. Murray,Texas. Inland Fisheries Division Pdf
Species. Freshwater mussels are the most rapidly declining group of animals in North America. This guide represents a first-ofits-kind reference to assist both biologists and naturalists in the identification and study of freshwater mussels. Freshwater Mussels of Texas contains 224 pages with 226 black and white photographs, 144 color photographs and 79 line drawings covering all 52 species found in Texas waters. Introductory sections cover basic anatomy, reproduction.
U.S. Fish and Wildlife Service. Region 3,Michael A. Hoggarth
Author : U.S. Fish and Wildlife Service. Region 3,Michael A. Hoggarth Publisher : Unknown Page : 50 pages File Size : 47,9 Mb Release : 1990 Category : Endangered species ISBN : UOM:39015032453188
Sustainable Ecological Systems by W. Wallace Covington Pdf
"This conference brought together scientists and managers from federal, state, and local agencies, along with private-sector interests, to examine key concepts involving sustainable ecological systems, and ways in which to apply these concepts to ecosystem management. Session topics were: ecological consequences of land and water use changes, biology of rare and declining species and habitats, conservation biology and restoration ecology, developing and applying ecological theory to management of ecological systems and forest health, and sustainable ecosystems to respond to human needs. A plenary session established the philosophical and historical contexts for ecosystem management."--Title page verso.
Medical and Applied Malacology Crossing Boundaries by Gisele Orlandi Introíni,Ana Rita de Toledo Piza,Lenita de Freitas Tallarico Pdf
This book provides an overview of the XI International Congress on Medical and Applied Malacology: “Crossing Boundaries: Integrative Approaches to Malacology”. The event was held at the State University of Rio de Janeiro between the 25th and 29th of September 2012. A number of the plenary lecturers from the conference were invited to contribute their papers to these proceedings, as were speakers whose papers were eligible for student awards. The volume contains articles on bioprospecting methods; medical malacology; aquaculture; biomonitoring; alien species; reproductive and developmental biology; interdisciplinary teaching and education; and trends in malacological research. The information contained here will convey to the general public the importance of mollusks to human and animal health, as well as their applications in various areas of knowledge.
Marine, Freshwater, and Wetlands Biodiversity Conservation by David L. Hawksworth,Alan T. Bull Pdf
Marine, coastal and wetland habitats are threatened, through exploitation, and also by climate change, as ocean currents change course, sea levels rise, and rainfall patterns change. This book gathers papers on the biodiversity conservation of these increasingly threatened habitats. The papers provide a snapshot of the problems they face, and offer numerous examples which render this volume valuable to educators in marine, freshwater and wetlands ecology, conservation and ecological restoration.