Download or read book Propagation of Juvenile Freshwater Mussels Bivalvia Unionidae and Assessment of Habitat Suitability for Restoration of Mussels in the Clinch River Virginia written by Lora Leigh Zimmerman and published by . This book was released on 2003 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: A habitat survey of the Clinch River, Virginia was conducted from Blackford, Clinch River Kilometer (CRK) 478 to the Tennessee border, CRK 325. Physical characteristics identified in the survey were combined with water quality and impact source data to develop a habitat suitability index for freshwater mussels within this study reach. Model parameters were indexed and weighted to give a final suitability ranking. Habitat units having the highest overall ranking included: Nash Ford (CRK 449), Artrip (CRK 442), several riffles and runs below Carterton (CRK 417), upstream of Mill Island (CRK 389.5), and Pendleton Island (CRK 365), and Speers Ferry (CRK 333-325). Potential locations for habitat restoration projects and additional monitoring were also identified.
Download or read book North American Journal of Aquaculture written by and published by . This book was released on 2007 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Freshwater Mussel Propagation for Restoration written by Matthew A. Patterson and published by Cambridge University Press. This book was released on 2018-02-22 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical, step-by-step guide to rearing freshwater mussels, one of the most imperiled groups of animals in the world.
Download or read book An Evaluation of the Suitability of the Cedar Bluff Spill Site for Recovery of Freshwater Mussels Clinch River Tazewell County Virginia written by William F. Henley and published by . This book was released on 2001* with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A chemical spill of rubber accelerator occurred in September 1998, on Route 460 near Cedar Bluff, Virginia when a tanker truck overturned. Glycogen (mg/g WW) was measured in mantle tissue of rainbow mussels (Villosa iris) relocated to 1 upstream site and 2 sites downstream of the spill location. Sampling occurred over 4 sample dates. There were no significant differences in the mean glycogen levels of the mussels among sites (p=0.38), indicating that the river reach affected by the toxic spill is now seemingly suitable for the restoration of mussels. The maximum, minimum, and mean ages of mussels killed at the site were determined for ... 14 mussel species.... Ages of the various mussel species ranged from 4-70+ yr, with populations of each species containing individuals ranging in age from young (
Download or read book Recovery Plan for the Birdwing Pearly Mussel written by Steven Ahlstedt and published by . This book was released on 1984 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Freshwater Mussels Unionidae Big Sunflower River Maintenance Project written by Andrew C. Miller and published by . This book was released on 1995 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for the Tan Riffle Shell Mussel Epioblasma Walkeri written by Richard J. Neves and published by . This book was released on 1984 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Freshwater Bivalve Ecotoxicology written by Jerry L. Farris and published by CRC Press. This book was released on 2006-11-16 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Recovery Plan for the Tuberculed blossom Pearly Mussel Epioblasma written by Steven Ahlstedt and published by . This book was released on 1985 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North American Freshwater Mussels written by Wendell R. Haag and published by Cambridge University Press. This book was released on 2012-08-27 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizes the ecology and natural history of North American freshwater mussels for scientists, natural resource professionals, students and natural history enthusiasts.
Download or read book Development of Juvenile Culture Techniques and Testing of Potential Biomarkers of Environmental Stress in Freshwater Mussels Bivalvia Unionidae written by Braven Brock Beaty and published by . This book was released on 1999 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book What Makes a Healthy Environment for Native Freshwater Mussels written by and published by . This book was released on 2000 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Freshwater Mussels in the Lower Ohio River in Relation to the Olmsted Locks and Dam Project written by Barry S. Payne and published by . This book was released on 1999 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Demographics of Six Freshwater Mussel Species Bivalvia written by Jennifer Claire Scott and published by . This book was released on 1994 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations for the Conservation and Propagation of Freshwater Mussels written by Christopher T. Owen and published by . This book was released on 2009 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater mussels are the most imperiled freshwater fauna in North America. Species faced unregulated harvest during the 'ignorant extermination' periods where they were sought for their pearls and mother-of-pearl shells. Much of the native range of most species has dwindled due to the loss of habitat from impoundment by rivers and dams. Impoundment also impacted mussels by blocking the migration of many host fishes, as unionids are briefly parasitic on fish and thus dependent upon fishes for reproduction. Over 70% of all unionid taxa are deemed threatened, endangered or of special concern, and much of this loss of biodiversity can be embodied by E. O. Wilson's HIPPO concept. Conservation efforts to preserve and protect these species have been constrained due to the lack of understanding of the natural history of most species and currently consist of mitigating destabilizing impacts to existing populations and bolstering mussel populations in areas with critical mussel habitat through propagation. Muskrats are natural predators of all freshwater mussels and can severely impact already vulnerable populations, possibly reducing populations below the minimum number for successful reproduction (Alice effect). Muskrats appear to select mussels after developing a search image for particular prey-type. At our site, muskrats favored cube-shaped (inflated or swollen) animals, over compressed mussels of equal lengths, presumably because inflated individuals tend to have more edible soft tissues (or at least possess the appearance that they do). Muskrats were extremely efficient at finding cube shaped species that were found at extremely low densities in the live community, such as Quadrula metanevra. Muskrats also heavily favored the endangered Fanshell Pearlymussel, Cyprogenia stegaria, which was the number one favored prey item at our site. The majority of endangered unionids (measured from our site and museum specimens) fall within the same size and shape of the species favored in our study. Given the efficiency of muskrats at finding particular prey species, mitigation of predation pressure by locally trapping or relocating muskrats should be considered as part of mussel recovery programs. Mitigation may be necessary for successfully bolstering or establishing new populations with propagated juveniles released into critical mussel habitat. In vitro metamorphosis is such a propagation method. It facilitates culturing unionids without their host fish, and may be the only method of propagation for many endangered species for which the host fish is unknown. We investigated the components and protocol of the in vitro method to increase the efficacy of producing healthy juvenile mussels. Control of microbial contamination was the major impediment to successfully culturing most species. Microbial contamination is best controlled by minimizing the introduction of microbes into the culture dishes, changing the culture medium regularly and replenishing antibiotics daily. Antimycotics negatively affect the development of most species and should be used at minimum working concentrations. The protein source used in vitro may be important for host-specific mussels species, but host-generalists can be successfully cultured in either mammalian or fish serum sources, though fish serum may possess natural antibiotics that aid the control of microbial contamination. Juveniles in cultures containing fish serum increase their lipid reserves significantly over their levels as glochidia, but it is unknown how the lipid levels compare to juveniles cultured on host fishes. Lipid fortified media produces animals with high survivorship post-metamorphosis but data are conflicting as to whether the fortified media produces juveniles with greater lipid reserves than media without lipid supplements. With modifications to the in vitro medium and protocol, juvenile mussels can be easily and consistently cultured without host fishes. One cohort of Lampsilis siliquoidea was cultured in vitro using mammalian serum in the culture medium and the juveniles were grown in hatchery conditions for one year after metamorphosis. The growth of the juveniles as measured by total length exceeded the predicted length based on Von Bertalanffy growth equations, indicating our juveniles possessed no immediately observable developmental abnormalities. Variation of size, periostracum coloration and ray patterns were highly variable in the juveniles; diverse phenotypes are typical of wildtype populations and suggestive that our method may not be selective or reduce the genetic diversity of the animals to be used to bolster natural populations. Overall, we feel that with our modifications, we can successfully culture healthy, viable juveniles for bolstering existing populations of freshwater unionids. Our method also allows for the efficient production of juvenile mussels in a laboratory setting for toxicity testing, genetic work and general histological and physiological research.
Download or read book Factors Affecting Feeding and Growth of Juvenile Freshwater Mussels Unionidae written by Jennifer Duzan and published by . This book was released on 2008 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Survival and growth rates of caged juvenile mussels were determined at five sites along a thirty kilometer reach of the James River over a six week period in summer. The juveniles were initially 7.5 mm long. Two species were compared: a habitat generalist (Potamilus alatus) and a small stream specialist (Lampsilis reeveiana). Suspended particles in the size range of 1-10 um (a measure of food availablity(increased progressively from upstream to downstream. Water temperature varied among sites and was lowest at the fourth most downstream site and highest at the most downstream site. Mussels were caged with or without access to the substrate, and both upstream and downstream of structure. Growth rate (length/time) was highest at the most downstream site and was strongly correlated with temperature but not with particle concentration. Both species responded similarly, but P. alatus had higher growth than L. reeveiana at all five sites. Juveniles in contact with substrate did not grow faster than those that were not in contact, suggesting that deposited particles were not an important food source. Juveniles caged upstream of structure (a partly buried cinder block) grew more slowly and had lower survival than those caged downstream of structure.
Download or read book A Comparative Study of Freshwater Mussel Habitat Along the Clinch River Tennessee and Virginia USA written by Jennifer Lynn Krstolic and published by . This book was released on 2001 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
