Suchergebnisse

The following report is an attempt to simplify and bring together some of the varied information concerning the field of stream improvement work. It is not a steadfast manual of stream improvement. It does not contain explanations of how to use the sophisticated equipment developed for stream analysis. Its purpose is to provide some guidelines in the stream improvement field which may be used by the average person, instead of the average stream biologist. It has become evident that much of the improvement of the streams in this province is attempted by outdoor clubs and organizations, and not by biologists and the Fish and Wildlife Branch. This is because of the fact that little money or time is available to these government agencies for this purpose. Therefore, groups get the idea to improve their favourite trout stream and often end up wasting their time and money and possibly even damaging the stream in the process, because they do not know what they are doing. It is toward these people, therefore, that this paper is directed. The following paper explains some of the most common and effective improvement devices used; derived from various sources which are not usually available to the average person. Also included is an example of a small stream improvement project conducted on a local stream to illustrate what one person can do with no funds and few materials. ; Student paper submitted for Wildland Recreation 271.

"March 10, 2005." ; Shipping list no.: 2005-0138-P. ; Distributed to some depository libraries in microfiche. ; Caption title. ; Mode of access: Internet.

"July 17, 2006." ; Shipping list no.: 2006-0286-P. ; Distributed to some depository libraries in microfiche. ; Caption title. ; Mode of access: Internet.

"Serial no. 110-6." ; Shipping list no.: 2007-0364-P. ; Distributed to some depository libraries in microfiche. ; Mode of access: Internet.

Many coastal and offshore fish species are highly dependent on specific habitat types for population maintenance. In the Baltic Sea, shallow productive habitats in the coastal zone such as wetlands, vegetated flads/lagoons and sheltered bays as well as more exposed rocky and sandy areas are utilized by fish across many life history stages including spawning, juvenile development, feeding and migration. Although there is general consensus about the critical importance of these essential fish habitats (EFH) for fish production along the coast, direct quantitative evidence for their specific roles in population growth and maintenance is still scarce. Nevertheless, for some coastal species, indirect evidence exists, and in many cases, sufficient data are also available to carry out further quantitative analyses. As coastal EFH in the Baltic Sea are often found in areas that are highly utilized and valued by humans, they are subjected to many different pressures. While cumulative pressures, such as eutrophication, coastal construction and development, climate change, invasive species and fisheries, impact fish in coastal areas, the conservation coverage for EFH in these areas remains poor. This is mainly due to the fact that historically, fisheries management and nature conservation are not integrated neither in research nor in management in Baltic Sea countries. Setting joint objectives for fisheries management and nature conservation would hence be pivotal for improved protection of EFH in the Baltic Sea. To properly inform management, improvements in the development of monitoring strategies and mapping methodology for EFH are also needed. Stronger international cooperation between Baltic Sea states will facilitate improved management outcomes across ecologically arbitrary boundaries. This is especially important for successful implementation of international agreements and legislative directives such as the Baltic Sea Action Plan, the Marine Strategy Framework Directive, the Habitats Directive, and the Maritime Spatial Planning Directive, but also for improving the communication of information related to coastal EFH among researchers, stakeholders, managers and decision makers. In this paper, efforts are made to characterize coastal EFH in the Baltic Sea, their importance and the threats/pressures they face, as well as their current conservation status, while highlighting knowledge gaps and outlining perspectives for future work in an ecosystem-based management framework

Many coastal and offshore fish species are highly dependent on specific habitat types for population maintenance. In the Baltic Sea, shallow productive habitats in the coastal zone such as wetlands, vegetated flads/lagoons and sheltered bays as well as more exposed rocky and sandy areas are utilized by fish across many life history stages including spawning, juvenile development, feeding and migration. Although there is general consensus about the critical importance of these essential fish habitats (EFH) for fish production along the coast, direct quantitative evidence for their specific roles in population growth and maintenance is still scarce. Nevertheless, for some coastal species, indirect evidence exists, and in many cases, sufficient data are also available to carry out further quantitative analyses. As coastal EFH in the Baltic Sea are often found in areas that are highly utilized and valued by humans, they are subjected to many different pressures. While cumulative pressures, such as eutrophication, coastal construction and development, climate change, invasive species and fisheries, impact fish in coastal areas, the conservation coverage for EFH in these areas remains poor. This is mainly due to the fact that historically, fisheries management and nature conservation are not integrated neither in research nor in management in Baltic Sea countries. Setting joint objectives for fisheries management and nature conservation would hence be pivotal for improved protection of EFH in the Baltic Sea. To properly inform management, improvements in the development of monitoring strategies and mapping methodology for EFH are also needed. Stronger international cooperation between Baltic Sea states will facilitate improved management outcomes across ecologically arbitrary boundaries. This is especially important for successful implementation of international agreements and legislative directives such as the Baltic Sea Action Plan, the Marine Strategy Framework Directive, the Habitats Directive, and the Maritime Spatial Planning Directive, but also for improving the communication of information related to coastal EFH among researchers, stakeholders, managers and decision makers. In this paper, efforts are made to characterize coastal EFH in the Baltic Sea, their importance and the threats/pressures they face, as well as their current conservation status, while highlighting knowledge gaps and outlining perspectives for future work in an ecosystem-based management framework. (C) 2018 Elsevier Ltd. All rights reserved. ; Peer reviewed

Ecohydraulics: An Integrated Approachprovides a research level text which highlights recent developments of this emerging and expanding field. With a focus on interdisciplinary research the text examines:-the evolution and scope of ecohydraulicsinteractions between hydraulics, hydrology, fluvial geomorphology and aquatic ecologythe application of habitat modelling in ecohydraulic studiesstate of the art methodological developments and approachesdetailed case studies including fish passage design and the management of environmental flow regimesresearch needs and the future of ecohydraulics researchThe contributions offer broad geographic coverage to encapsulate the wide range of approaches, case studies and methods used to conduct ecohydraulics research. The book considers a range of spatial and temporal scales of relevance and aquatic organisms ranging from algae and macrophytes to macroinvertebrates and fish. River management and restoration are also considered in detail, making this volume of direct relevance to those concerned with cutting edge research and its application for water resource management.Aimed at academics and postgraduate researchers in departments of physical geography, earth sciences, environmental science, environmental management, civil engineering, biology, zoology, botany and ecology; Ecohydraulics: An Integrated Approachwill be of direct relevance to academics, researchers and professionals working in environmental research organisations, national agencies and consultancies.