Download or read book Preliminary Survey for Freshwater Mussel Populations in Lake Rotoiti written by Jane Davies and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Preliminary Survey of the Freshwater Mussels of the Bayfield River Watershed and Nearby Lake Huron Tributaries written by Todd James Morris and published by . This book was released on 2012 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Surveys of the freshwater mussels (Unionidae) of the Bayfield River watershed and smaller nearby Lake Huron tributaries in southwestern Ontario were undertaken by Fisheries and Oceans Canada in 2007 and 2008, respectively. Eighteen sites were sampled along the Bayfield River, from both the main channel and its tributaries. A total of 1385 animals were found, representing 16 species. The dominant species in the Bayfield River watershed was Pyganodon grandis, which occurred at over half of the sites surveyed, and represented 44% of all mussels found."--Document.

Download or read book A Guide to Sampling Freshwater Mussel Populations written by David Lowell Strayer and published by . This book was released on 2003 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this guide is to help field biologists conduct better surveys of freshwater mussel populations. It opens with a discussion of several considerations and a question that should direct the design of any study of mussel populations. The authors then present sampling designs and methods that may be useful to mussel biologists. The also discuss examples of study designs that address several common objectives of studies of mussel populations.

Download or read book Freshwater Mussels and Other Macroinvertebrates Iowa and Cedar River Basins written by Brice, Petrides & Associates and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Survey of the Freshwater Mussel Fauna of the Little Kanawha River Basin written by J. E. Schmidt and published by . This book was released on 1983 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The West Virginia Department of Natural Resources, Division of Water Resources, is currently undertaking a statewide survey of West Virginia's freshwater mussel resources. The purpose of this statewide survey is to identify where healthy populations of freshwater mussels exist. This will provide baseline data for future wastewater management decisions. Once identified, these populations will be sampled periodically for changes in diversity and/or for tissue and shell analyses of pesticides and metals. Areas not found to have mussels in initial surveys will be checked periodically to determine if improved water quality has brought about a return of the mussles.

Download or read book A Survey of the Freshwater Mussels Mollusca Unionidae of the Dix River Drainage Upstream of Dix Dam written by Noelle Lee Smith and published by . This book was released on 2000 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The decline in freshwater mussel populations has been attributed to many point and non-point sources of pollution. These factors include habitat degradation, agricultural runoff, dams, increased siltation, and the introduction of exotic fauna. Therefore, historic data must be updated in order to monitor the current status of mussel communities. Historically 16 species of mussels have been reported from the Dix River drainage. Thirty two sites in the drainage were sampled from June 1998 - September 1999. Shells were collected in the stream, and along its banks. Live mussels were located through visual searching, and probing through sediment. All clams were identified to the species level. Eleven species were found to be currently living in the river. Simpsonias ambigua, Taxolasma parvus, and Villosa lienosa were found present only as shells. Lampsilis fasciola previously found in the drainage was not collected during the current survey. During the study Pleurobema clava sub-fossil shells were found. This species had not previously been reported from the drainage.

Download or read book A Preliminary Survey of the Freshwater Mussels Unionidae of the Nottawasaga River Watershed written by Minke-Martin, V and published by . This book was released on 2012 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Freshwater Mussels in Montana written by David Stagliano and published by . This book was released on 2010 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past three years, weve made significant strides toward documenting distributions and understanding Montanas freshwater mussels through data compilation, inventory and public education. Although the five eastern Montana mussel species (2 native and 3 introduced) have secure populations and are even expanding their ranges, one of the states native species, the western pearlshell, Margaritifera falcata has experienced significant range reductions in the past 100 years, and in 2008 was added to Montanas SOC list as a S2, vulnerable to extinction in the state. Despite finding eight western streams with large viable pearlshell populations (up to 3,000 mussels per km), we have evidence from hundreds of negative surveys documenting the extirpation of the western pearlshell from countless streams and hundreds of river miles throughout the state, as well as dozens of non-viable populations that will be extirpated from streams and whole watersheds (Smith River) within the next 25 years. This fact should be an impetus to continue to research and understand this species in Montana, in addition to actively pursuing restoration projects that would benefit this species or its native fish host the westslope cutthroat trout. We performed extensive surveys in most of the eastern watersheds of the state and report that the largest populations of warm water mussels, notably the native fatmucket and introduced black sandshell (avg. 8.2 and 4 mussels per hour, respectively), are found within the Wild & Scenic Missouri River between Fort Benton and Judith River landing and the Marias River (above Lake Elwell & within 10 miles of the confluence) where fatmucket populations are approaching Missouri River densities (avg. 7 per hr). The native giant floater, Pyganodon grandis is more evenly distributed and abundant in the Northern Glaciated Prairie River Basins compared to central and southeast Montana, but rarely did we find populations exceeding more than 10 mussels per hour. Our surveys in the Yellowstone River indicate that the mainstem river has much lower mussel density overall, with fatmucket catch rates averaging ~1 per hour. Although, large prairie rivers entering the Yellowstone River have higher fatmucket densities: Bighorn and Tongue Rivers averaged 6 and 5 individuals per hour, respectively. We documented the first records of live giant floaters in the Yellowstone Basin at 3 tributary sites (OFallon, Little Porcupine, Tongue River), but no evidence of this species found live in the mainstem. The introduced mapleleaf (Quadrula quadrula) has high densities in the lower Tongue River, but was not found live in the mainstem Yellowstone. The introduced creek heelsplitter have increased their upstream distribution in the Milk River system, but not to the extent that the black sandshell have expanded their range. The introduced mussels in Montana do not seem to be negatively affecting the native species, coexistence and non-exclusion is evident in stream reaches documented to have both present. But rather, they seem to be an augmentation to the mussel fauna of the state and in the case of the black sandshell seems to be more viable in the upper Missouri River than in its native sections of the Missouri River where it is in decline. Over the last three years weve given mussel survey and identification workshops to over 65 fisheries biologists and hydrologists in MT & ID to increase the knowledge base, interest and capacity to survey and report mussel populations in all regions of the state. Attendees of these workshops reported back data for an additional 100 survey reaches, including the identification of two new viable western pearlshell sites in 2009. To generate public interest and support of freshwater mussels, we produced a pocket-sized mussel field guide and a full-sized Mussels of Montana Poster which will be distributed around the state from various agency offices and within the science educational system. Increasing interest and knowledge in freshwater mussels and species other than the typical sportfish is essential for the sustainability of these species and for the concern of the health of their aquatic ecosystems.

Download or read book A Survey of Freshwater Mussels Unionidae in Eastern Ontario South Nation River Lyn Creek and Jones Creek in 2009 written by M. N. Sheldon and published by . This book was released on 2018 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Timed-search surveys were completed at five sites on the South Nation River (SNR), one site on Lyn Creek and one site on Jones Creek by Fisheries and Oceans Canada (DFO) in 2009. These surveys aimed to augment or determine information regarding the freshwater mussel populations in these three waterbodies as DFO had not previously surveyed these rivers. A total of 1230 live individuals were observed across the three waterbodies, representing nine species including one Species at Risk (SAR). Elliptio complanata was the most abundant species (758 individuals) in the SNR occurring at 80% of sites. Lampsilis radiata was the most abundant species (175 individuals) in Lyn Creek and ten endangered Ligumia nasuta were also observed in this waterbody, representing the only SAR observation during the Eastern Ontario surveys. Elliptio complanata (8 individuals) was the only species found in Jones Creek. DFO succeeded in strengthening mussel species inventory records in the SNR and Lyn Creek as well as generating baseline data for the relatively under-studied Jones Creek"--Abstract, p. v.

Download or read book A Handbook of Global Freshwater Invasive Species written by Robert A. Francis and published by Routledge. This book was released on 2017-08-11 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.

Download or read book Ecology and Evolution of the Freshwater Mussels Unionoida written by G. Bauer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: All those who think that bivalves are boring are in the best company. Karl von Frisch is reported to have turned the pages more quickly in texts where bivalves were treated because, according to him, they literally lack any behaviour. The fact that they can filtrate huge amounts of water, burrow into the sedi ment, actively swim, drill holes into rocks and boats or detect shadows with the aid of pretty blue eyes located on the rim of their mantle obviously left v. Frisch unimpressed. Why, then, a book on the large freshwater mussels (Naiads or Unionoida), which on first sight are much less spectacular than the marine ones? The main reason is that they are keepers of secrets which they reveal only on close and careful inspection. This is not only true for the pearls some species produce and which over centuries have contributed to the treasures of bishops and kings, but particularly for their ecology: their life cycles are linked with those of fishes, some can occur in incredible densities and some can live for more than 100 years. Thus, the presence or absence of naiads in a lake or stream has manifold implications.

Download or read book Ecosystem Services in New Zealand written by John Dymond and published by . This book was released on 2013 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management of New Zealand's environment needs to be based on sound knowledge. Natural resource managers and policy makers now have at their fingertips the first comprehensive assessment of the state of ecosystem services - the benefits people obtain from nature - in this country. More than 100 of New Zealand's leading scientists and academics have penned the 36 chapter for the new 540-page book. Ecosystem services are categorised as 'provisioning', such as food, timber and freshwater; 'regulating', such as air quality, climate and pest regulation; 'cultural' such as recreation and sense of belonging; and 'supporting', such as soil quality and natural habitat resistance to weeds.

Download or read book Ecological Effects of Pesticides on Non target Species written by David Pimentel and published by . This book was released on 1971 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology of Australian Freshwater Fishes written by Keith Walker and published by CSIRO PUBLISHING. This book was released on 2013-04-10 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume reviews our past and present understanding of the ecology of Australian freshwater fishes. It compares patterns and processes in Australia with those on other continents, discusses the local relevance of ecological models from the northern hemisphere and considers how best to manage our species and their habitats in the face of current and future threats. In view of these challenges, the need for redress is urgent. The chapters are written by some of our foremost researchers and managers, developing themes that underpin our knowledge of the ecology, conservation and management of fish and fish habitats. For each theme, the authors formulate a synthesis of what is known, consider the need for new perspectives and identify gaps and opportunities for research, monitoring and management. The themes have an Australian context but draw upon ideas and principles developed by fish biologists in other parts of the world. The science of freshwater fish ecology in Australia has grown rapidly from its roots in natural history and taxonomy. This book offers an introduction for students, researchers and managers, one that the authors hope will carry Australian fish biology and resource management to new levels of understanding.

Download or read book Lake Restoration Handbook written by David P. Hamilton and published by Springer. This book was released on 2019-01-29 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lakes across the globe require help. The Lake Restoration Handbook: A New Zealand Perspective addresses this need through a series of chapters that draw on recent advances in modelling and monitoring tools, citizen science and First Peoples’ roles, catchment and lake-focused restoration techniques, and policy implementation. New Zealand lakes, like lakes across the globe, are subject to multiple pressures that have increased in severity and scale as land use has intensified, invasive species have spread and global climate change becomes manifest. This books builds on the popular Lake Managers Handbook (1987), which provided guidance on undertaking investigations into, and understanding lake ecosystems in New Zealand. The Lake Restoration Handbook: A New Zealand Perspective synthesises contemporary issues related to lake restoration and rehabilitation, integrated with social science and cultural viewpoints, and complemented by authoritative topic-area summaries by renowned scientists and practitioners from across the globe. The book examines the progress of lake restoration and the new and emerging tools available to managers for predicting and effecting change. The book will be a valuable resource for natural and social scientists, policy writers, lake managers, and anyone interested in the health of lake ecosystems.

Download or read book Landscape and Quaternary Environmental Change in New Zealand written by James Shulmeister and published by Springer. This book was released on 2016-12-16 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together an overview of the recent geological history, active earth and biological processes and human settlement of New Zealand. Topics covered include the very active neotectonic and volcanic setting. Mountain geomorphic processes are examined and new ideas about landsliding are highlighted. The exceptional sedimentary archives of the Whanganui Basin are also presented. As one of two land masses that extend into the southern mid-latitudes, New Zealand is ideally located to investigate changes in Southern Ocean climate. Related to this, mountain glaciation in New Zealand is a focus in global climate change debates. New Zealand also has a unique biota due to its long isolation and is the last major land mass to be settled by people. Advances in DNA technologies have revolutionised our understanding of the histories and processes involved. The book provides a comprehensive review of existing work and highlights new ideas and major debates across all these fields.

Download or read book Freshwater Management written by M. Kumagai and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The globalization of trade, monetary and fiscal policies, capital markets, and investment patterns is reshaping the world economy and is leading to new financial, commercial, and marketing structures as well as unprecedented economies of scale. Simultaneously, national and international awareness and to strengthen. There is consensus among responses to accelerating environmental degradation continue most developed countries that the rapidly evolving new economic order needs to be well integrated with policies to maintain or restore environmental quality. Many challenges remain, however, in evaluating the geo-ecological implications of economic globalization, and in formulating the appropriate management responses. In lakes and rivers, the management of water supply and quality has largely proceeded on the basis of local considerations rather than at the global scale that has been more typical of environmental management of the atmosphere and ocean. It is increasingly apparent, however, that high-quality water resources are now in critically short supply not only because of local problems such as over-irrigation and eutrophication, but also as a result of larger-scale climate effects on the hydrosphere. This magnitude of impact will increasingly require the integrated monitoring and management of water resources on a planetary scale, with world criteria for environmental assessment, restoration, and conservation strategies. The increasing extent of world trade in potable freshwater heightens the urgency for establishing international approaches, criteria, and regulations.