Download or read book Selective Small Mammal Predation on Freshwater Mussels by Size and Species in the St Croix River MN written by Megan Conlon Tyrrell and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Minnesota Academy of Science written by and published by . This book was released on 1989 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Status and Life History of the Winged Mapleleaf Mussel Quadrula Fragosa in the St Croix River Minnesota and Wisconsin written by and published by . This book was released on 1995 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of a Freshwater Mussel Bed St Croix River Minnesota written by Donald Glen Hardy and published by . This book was released on 1994 with total page 464 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 A Field Guide to the Freshwater Mussels of Minnesota written by Bernard E. Sietman and published by . This book was released on 2003 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction of a Taxonomic Key to the Freshwater Mussels of the St Croix River Using Restriction Fragment Length Polymorphisms written by Megan Albert and published by . This book was released on 2001 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater mussels are imperiled across North America. For effective conservation of native mussels, the relationships between parasitic mussel larvae (glochidia) and their fish hosts need to be clarified. This project involves constructing a genetically based key for the St. Croix River mussel populations allowing species identification of these microscopic and morphologically indistinct glochidia. A polymorphic region within the genes encoding ribosomal RNA is amplified using the Polymerase Chain Reaction (PCR). Restriction endonuclease fragemntation of amplified DNA and electrophoretic analysis of the fragments reveals unique species polymorphisms. The restriction fragment length polymorphisms obtained are assembled into a taxonomic key.
Download or read book Mussels of Central and Northern Minnesota written by and published by . This book was released on 1912 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Attack of the Zebra Mussels written by Michael Rajczak and published by Gareth Stevens Publishing LLLP. This book was released on 2016-12-15 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boaters on the Great Lakes often see clusters of small mussels stuck to docks, rocks, and even boats! Called zebra mussels, these organisms can cause people to cut their feet, filter out food for larval fish, and more. Through reading about how zebra mussels came to these freshwater lakes, readers learn what invasive species are and how they can cause great harm to native ecosystems. Facts about the spread of zebra mussels and efforts to stop this spread introduce readers to conservation and other science curriculum topics. Full-color photographs, fact boxes, and maps showing zebra mussel distribution augment readersÂ’ understanding.
Download or read book Flatworm Predation on Juvenile Freshwater Mussels written by Angela Marie Delp and published by . This book was released on 2002 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Guide to the Freshwater Mussels of the Pacific Northwest written by Ethan J.. Nedeau and published by . This book was released on 2005 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Louisiana Freshwater Mussels written by Malcolm F. Vidrine and published by . This book was released on 2019-11-24 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixty-three (63) species of freshwater mussels are known to be historically distributed in the waterways of Louisiana. Each of these species is discussed and illustrated with photographs. Maps showing the known distributions of each species are also provided. Parasitic mites (Unionicola) are also discussed. Plates from 3 earlier books are updated and annotated. Community structure of freshwater mussel beds in Louisiana is introduced.
Download or read book The Ecology of Freshwater Molluscs written by Robert T. Dillon and published by Cambridge University Press. This book was released on 2000-03-09 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: All aspects of the ecology of freshwater molluscs are discussed in this unique volume. Extensively referenced and providing a synthesis of work from the nineteenth century onwards, this book will appeal to professional ecologists, evolutionary biologists and parasitologists interested in these diverse invertebrates.
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 Ecology and Classification of North American Freshwater Invertebrates written by James H. Thorp and published by Academic Press. This book was released on 2010 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The third edition of Ecology and Classification of North American Freshwater Invertebrates continues the tradition of in-depth coverage of the biology, ecology, phylogeny, and identification of freshwater invertebrates from the USA and Canada. This text serves as an authoritative single source for a broad coverage of the anatomy, physiology, ecology, and phylogeny of all major groups of invertebrates in inland waters of North America, north of Mexico." --Book Jacket.
Download or read book Freshwater Fishes of North America written by Melvin L. Warren, Jr. and published by Johns Hopkins University Press. This book was released on 2020-07-14 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt: H. Wilson
Download or read book Quagga and Zebra Mussels written by Thomas F. Nalepa and published by CRC Press. This book was released on 2013-10-25 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction and rapid spread of two Eurasian mussel species, Dreissena polymorpha (zebra mussel) and Dreissena rostriformis bugensis (quagga mussel), in waters of North America has caused great concern among industrial and recreational water users. These invasive species can create substantial problems for raw water users such as water treatment facilities and power plants, and they can have other negative impacts by altering aquatic environments. In the 20 years since the first edition of this book was published, zebra mussels have continued to spread, and quagga mussels have become the greater threat in the Great Lakes, in deep regions of large lakes, and in the southwestern Unites States. Quagga mussels have also expanded greatly in eastern and western Europe since the first book edition was published. Quagga and Zebra Mussels: Biology, Impacts, and Control, Second Edition provides a broad view of the zebra/quagga mussel issue, offering a historic perspective and up-to-date information on mussel research. Comprising 48 chapters, this second edition includes reviews of mussel morphology, physiology, and behavior. It details mussel distribution and spread in Europe and across North America, and examines policy and regulatory responses, management strategies, and mitigation efforts. In addition, this book provides extensive coverage of the impact of invasive mussel species on freshwater ecosystems, including effects on water clarity, phytoplankton, water quality, food web changes, and consequences to other aquatic fauna. It also reviews and offers new insights on how zebra and quagga mussels respond and adapt to varying environmental conditions. This new edition includes seven video clips that complement chapter text and, through visual documentation, provide a greater understanding of mussel behavior and distribution.
