Download or read book Sensitivity of British Columbia s Freshwater Fish to Timber Harvest Using Species Traits as Predictors of Species Risk written by Gordon Robert Haas and published by . This book was released on 2000 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fish stream Identification Guidebook written by British Columbia. Ministry of Forests and published by . This book was released on 1995 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The British Columbia Forest Practices Code specifies planning and operational guidelines for each phase of timber harvesting operations around streams, lakes, and wetlands. This guide describes suitable practices to meet the objectives of the riparian management regulations within the Code, specifically the requirement to correctly identify streams on the basis of fish presence in order to ensure the protection of fish populations and habitats during all phases of forest harvesting. The guide defines the classes of streams distinguished for aquatic ecosystem and riparian zone management, identifies fish species that define a stream as fish-bearing under the Code, and describes factors influencing fish-stream identification such as stream reach, gradient, stream size, natural barriers, and fisheries sensitive zones. The guide concludes with methods for identifying fish streams, including measurement, sampling, data recording, and mapping procedures.

Download or read book Life History Characteristics of Freshwater Fishes Occurring in British Columbia with Major Emphasis on Lake Habitat Requirements written by Cultus Lake Research Laboratory and published by [Cultus Lake, B.C.] : Fisheries and Oceans Canada. This book was released on 2001 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Life History Characteristics of Freshwater Fishes Occurring in British Columbia and the Yukon with Major Emphasis on Stream Habitat Characteristics written by Canada. Department of Fisheries and Oceans and published by [Cultus Lake, B.C.] : Fisheries and Oceans Canada. This book was released on 2002 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Review of the Impacts of Climate Change on BC s Freshwater Fish Resources and Possible Management Responses written by University of British Columbia. Fisheries Centre and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fish Ecology in Ootsa Lake British Columbia in Relation to Submerged Timber Harvesting written by Linda Yvonne Brooks and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ootsa Lake is part of a 48-year-old northwestern British Columbia reservoir (Nechako Reservoir) that contains extensive amounts of flooded forests. Recently, logging companies have begun harvesting this standing underwater timber because of its potential as an alternative fibre source. This project was initiated because of the general lack of information on fishes in the reservoir and because the potential impact of submerged timber removal on the fish community had not previously been explored. Catches with experimental gill nets and live traps were monitored between July 7 and October 22, 1998 to estimate the abundance, diversity, size, and condition of fishes in Ootsa Lake. Catch per unit effort (CPUE) was quantified and ranked to evaluate the impact of submerged timber harvesting on the abundance of the dominant fish species. Mean ranks were compared across species; across three near-shore habitats with different levels of structural heterogeneity (treed, harvested, or open); and across the summer and fall seasons. Shannon-Wiener diversity indices were calculated and compared across habitats. Size and condition of the main fish species were compared across habitats. Fish abundance was positively associated with habitat structural complexity. Overall abundance was highest in the treed habitat. In the summer, rainbow trout (Oncorhynchus mykiss) abundance was highest in the treed habitat whereas northern pikeminnow (Pfychochei/us oregonensis) were abundant in both treed and harvested habitats. Rainbow trout and northern pikeminnow abundance in near-shore areas decreased in the fall, but numbers of kokanee (Oncorhynchus nerka) increased. Shannon-Wiener diversity indices did not differ significantly among habitats overall, but in the summer the index was significantly higher in the open than the treed and harvested habitats, whereas it was significantly lower in the fall. Sizes of rainbow trout, kokanee, and northern pikeminnow were related to habitat structural complexity with the smallest fish occupying the treed habitat and the largest rainbow trout and northern pikeminnow occurring in the open habitat. Fulton's condition factor was not consistently related to habitat structural complexity but differed among sites within habitat. Kokanee were found to be exceptionally small (mean fork length = 180 mm ~ 0.95) with over 85% of individuals being age 2+. They also exhibited characteristics similar to "residual" sockeye salmon (Oncorhynchus nerka) including a significantly male-biased sex ratio and olive-black spawning colouration. I hypothesize that kokanee are exhibiting adaptive life history patterns in response to the cold, oligotrophic conditions in this large reservoir. Juvenile fish often seek complex underwater structure for protection from predators, and submerged structure has been shown to increase invertebrate production. Therefore, it is likely that small rainbow trout and northern pikeminnow inhabit areas with submerged timber because it provides refuge from predators and/or because of a high abundance of food. The use of benthic harvested areas by small northern pikeminnow may be for similar reasons because overturned root wads and woody debris remain post-harvest. Diversity of fish species was not positively associated with habitat structural complexity.

Download or read book Indigenous Fish Species Potentially at Risk in BC with Recommendations and Priorizations for Conservation Forestry resource Use Inventory and Research written by Gordon Robert Haas and published by . This book was released on 1998 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Indigenous Fish Species Potentially at Risk in BC with Recommendations and Prioritizations for Conservation Forestry resource Use Inventory and Research written by Gordon Robert Haas and published by . This book was released on 1998 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Foundation for Conservation the Nature and Origin of the Freshwater Fish Fauna of British Columbia written by McPhail, J. D. (John Donald) and published by . This book was released on 1992 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Columbia River Northern Pike written by Daniel James Doutaz and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Northern pike (Esox lucius) is a widely distributed freshwater fish in the northern hemisphere, holding both recreational and commercial value in many countries including Canada. Pike are apex predators and are well regarded as a sport fish due to their size and voraciousness, leading to a long history of introductions outside their native range in North America. Invasive pike populations can impose significant top-down pressure on native fish community structure through predation and competition for resources, and have been linked with significant reductions of a variety of native species. Pike have recently invaded the Columbia River in British Columbia downstream of the Hugh L. Keenleyside Dam, threatening important sport fisheries, local ecosystems, and Species at Risk recovery work currently being conducted in the Columbia and its tributaries. In response to the invasion, the province implemented a pike suppression program, yet several questions remain regarding the ecology and behaviour of the recently colonized population. This research aimed to answer these questions and aid in the development of a long term management strategy for the Columbia River. Four years of data collected through the suppression program were analyzed to investigate the potential risk the invasion poses to native fish communities in B.C., the status of pike in the B.C. Columbia River, and the efficacy and impacts of current efforts. A total of 352 northern pike were captured through the suppression program by gill-netting (n=323) and angler incentives (n=29), ranging in length from 260 mm to 1050 mm. Cleithra age estimates indicate pike from within this population are achieving sizes in excess of 1 m in five to six years, and are in better than average body condition (relative weight Wr used) when compared to other North American populations. A total of 584, 659, 407, and 676 gill-net hours were set in 2014, 2015, 2016, and 2017 respectively, and an overall reduction in pike catch per unit effort (CPUE) was observed from the initial year (0.19 pike/hr) to the final year (0.05 pike/hr). This suggests gill-netting has been effective at reducing the number of adult pike in B.C. and should be conducted annually. The capture of several juvenile pike (n = 14) near Castlegar in 2017 indicates spawning is occurring in B.C. and future years of suppression should include controlling the juvenile cohort. Salmonids, particularly whitefish spp., appear to be at the greatest risk from pike predation making up approximately 50% of pike diet overall. Acoustic tracking of pike indicated the majority of individuals from within this population remain relatively sedentary, yet one individual migrated in excess of 100 km between B.C. and Washington. Microchemical analysis of pike otoliths revealed significant differences in ratios of Sr and Ba to Ca between pike caught in the Columbia and Pend d'Oreille Rivers, and that a small portion of the current Columbia population in B.C. appears to have originated in the Pend d'Oreille River. Fluctuations in otolith elemental Mg concentrations also appear to provide information that can be used to estimate the age of northern pike and potentially other esocid species. Lastly, the use of environmental DNA (eDNA) sampling as a tool to monitor the presence and spread of northern pike in B.C. was explored with minimal success; the protocol used and results obtained are discussed.

Download or read book Economic Values and Impacts of Freshwater Sport Fishing in British Columbia written by British Columbia. Fisheries Branch and published by . This book was released on 1988 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 2012-03-12 with total page 918 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 Impacts of climate change on fisheries and aquaculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-01-06 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.

Download or read book Conservation by Proxy written by Tim Caro and published by Island Press. This book was released on 2010-06-23 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast scope of conservation problems has forced biologists and managers to rely on "surrogate" species to serve as shortcuts to guide their decision making. These species-known by a host of different terms, including indicator, umbrella, and flagship species-act as proxies to represent larger conservation issues, such as the location of biodiversity hotspots or general ecosystem health. Synthesizing an immense body of literature, conservation biologist and field researcher Tim Caro offers systematic definitions of surrogate species concepts, explores biological theories that underlie them, considers how surrogate species are chosen, critically examines evidence for and against their utility, and makes recommendations for their continued use. The book clarifies terminology and contrasts how different terms are used in the real world considers the ecological, taxonomic, and political underpinnings of these shortcuts identifies criteria that make for good surrogate species outlines the circumstances where the application of the surrogate species concept shows promise Conservation by Proxy is a benchmark reference that provides clear definitions and common understanding of the evidence and theory behind surrogate species. It is the first book to review and bring together literature on more than fifteen types of surrogate species, enabling us to assess their role in conservation and offering guidelines on how they can be used most effectively.

Download or read book Global Change and Terrestrial Ecosystems written by Brian Harrison Walker and published by Cambridge University Press. This book was released on 1996-11-13 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This major new book presents a collection of essays by leading authorities who address the current state of knowledge. The chapters bring together the early results of an international scientific research program designed to address what will happen to our ability to produce food and fiber, and what effects there will be on biological diversity under rapid environmental change. This book addresses how these changes to terrestrial ecosystems will feed back to further environmental change. International in scope, this state-of-the-art assessment will interest policymakers, students and scientists interested in global change, climate change and biodiversity. Special features include descriptions of a dynamic global vegetation model, developing generic crop models and a special section on the emerging discipline of global ecology.

Download or read book Global Climate Change Impacts in the United States written by U.S. Global Change Research Program and published by Cambridge University Press. This book was released on 2009-08-24 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the science of climate change and impacts on the United States, for the public and policymakers.

Download or read book From Impacts to Adaptation written by and published by Canadian Museum of Civilization/Musee Canadien Des Civilisations. This book was released on 2008 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses current and future risks and opportunities that climate change presents to Canada, with a focus on human and managed systems. Based on analysis of existing knowledge.