By A. Lelek (auth.), Dr. A. Kirchhofer, Dr. D. Hefti (eds.)
Two occasions have lately more suitable the customers of defending fish and their atmosphere in Switzerland: the reputation of a brand new Federal Water defense legislation within the plebiscite of may perhaps seventeenth 1992, and the hot Federal laws on Fisheries, in strength in view that January 1st 1994. With this criminal framework, the probabilities for cover of nature and panorama have now significantly more desirable in Switzerland. crucial goals of the Federal legislation on Water security are to protect the usual habitats of the local natural world and water because the habitat of aquatic organisms. This comprises not just the maintenance or recovery of water caliber in lakes and rivers, but additionally, in rivers used for hydroelectricity, irrigation or as commercial or different water provides, the upkeep of enough water to satisfy the minimum necessities for fish. besides the fact that, high quality water in enough quan tities by myself isn't sufficient to assure the survival of fish. Intact fish habitats contain numerous actual buildings together with lots of hiding areas, looking grounds, replica and nursery components inside appropriate distances from one another. This 3rd point of conservation and recovery of aquatic habitats is a vital element within the new Federal legislation on Fisheries. while the previous types of this legislations have been extra curious about fishery rules, the new laws defines new components of accountability for the federal and the cantonal governments.
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Extra resources for Conservation of Endangered Freshwater Fish in Europe
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Large spotted trout - Salmo trutta macrostigma (Dumeril, 1858) The large spotted trout does not live on the continent but only in Corsica. The difference with the brown trout (Salmo truttafario) is that it is smaller and has small spots scattered on the sides and gill cover, as well as a large black spot behind the eye. Until not long ago, it could be found in most of the Corsican streams (Spillmann, 1961). But in the 1940s and 1950s, aerial eradication programmes using DDT were organised to fight Anopheles (vectors of malaria); this was followed by introductions of the brown trout for angling.
This is because of the geographical situation of the country, at the western tip of the European continent, and the bioclirnatic evolution of the area during the glaciations, in the quaternary period (Banarescu, 1965; Balon, 1968). The ichthyological fauna becomes poorer in each river system, as one moves westward. It is more varied in the Rhone (Pattee, 1988) than in the Loire (Arrignon, 1988) or the Seine (Belliard, 1994). This original structure of our ichthyological fauna has been altered from the very beginning by human activity (Guillerrne, 1983; Petts, 1988).