Related items
Showing items related by metadata.
-
Book (series)Structures assisting the migrations of non-salmonid fish: USSR 1989
Also available in:
No results found.This technical paper provides information on provisions, made in the USSR, to facilitate fish migra-tion under conditions of modified river flow resulting from engineering construction and water abstraction. The fish-pass and fish protection structures described utilise a knowledge of the physiology, biology, ecology and behaviour of the migrating species. The principles of their design and operation are elaborated in relation to characteristics of the species of fish concerned. Structures described include sluice fish-passes, hydraulic and mechanical fish-lifts and mobile devices for fish collection and transfer, together with protection and guiding devices used to ensure downstream migration of young fish. -
Book (stand-alone)Fish passes. Design, dimensions and monitoring. 2002(Originally published in German by Deutscher Verband für Wasserwirtschaft und Kulturbau e.V.) Many fish species, like salmon and sturgeon, undertake extended migrations as part of their basic behavior, and other fish and invertebrates also undertake short-term or small-scale migrations at certain phases of their life cycles. Activities such as dam construction for water supply and power generation, channelization for navigation and flood control, land drainage and wetland reclamation for agricul tural and urban use all have profound impact on the aquatic ecosystem and thus on natural fish populations. Fish passes are often the only way to make it possible for aquatic fauna to pass obstacles that block their up-river journey. Based on knowledge and experience from mainly Europe and North America, this book describes the various types of fish passes, with special emphasis to "close-to-nature" solutions. It is hoped that this book contributes largely to increase the awareness of the need f or unobstructed fish passage and to multiply the number of well-designed and well-dimensioned fish passes around the globe to restore lost migration routes.
-
No Thumbnail AvailableProjectDistribution, Migration and spawning of the main fish resources in the Northern CECAF Area 1982
Also available in:
No results found.These maps have been prepared on the basis of data in the reports listed in the bibliography of this paper. The work makes no claim to have covered all the available literature and I apologize in advance to any authors whom I may have unwittingly omitted. The quality of the data base was variable, necessitating much interpretation on my part in preparing the maps, and I claim full responsibility for any errors which may appear. The preparation of a detailed Atlas of th e region's resources is a long-range, team effort. So this is by way of a preliminary, and is meant to summarize present knowledge, provoke constructive criticism and be improved over time by the scientists concerned. This work was made possible by more than ten years of sustained efforts on the part of my predecessors in the major laboratories of the region. I feel justice has been done to them in the bibliography but I would also like to thank all those in the CECAF working parties whose sometimes anonymous contribution helped to make this Atlas.
Users also downloaded
Showing related downloaded files
No results found.