By Pierre Magnan, Céline Audet, Hélène Glémet, Michel Legault, Marco A. Rodríguez, Eric B. Taylor
Salvelinus species are some of the most completely studied teams of fishes. Many purposes clarify this extreme curiosity in charr biology. Charrs have a Holarctic distribution encompassing many Asian, North American, and eu international locations and occupy different marine and freshwater environments. moreover, the present distribution of charr comprises parts that have been without delay motivated by way of weather and topographic switch linked to the numerous Pleistocene glaciations. unquestionably, those stipulations have promoted a lot of the super morphological, ecological, and genetic variability and plasticity inside Salvelinus species and so they make charr excellent versions to check evolutionary strategies 'in action'. Many charr species additionally express demographic features reminiscent of gradual development, past due adulthood, and lifestyles in severe environments, which could raise their susceptibility to extinction from habitat adjustments and overexploitation, in particular in depauperate aquatic habitats. This vulnerability makes figuring out their biology of serious relevance to biodiversity and conservation. eventually, charr are of significant cultural, advertisement, and leisure value to many groups, and their intimate linkage with human societies has motivated a lot curiosity during this enigmatic genus. This quantity contains a range of papers awarded on the fourth foreign Charr Symposium held in Trois-Rivières (Québec, Canada), from 26 June to at least one July 2000. It contains 31 papers on ecological interactions and behavior, trophic polymorphism, flow and migration, ecophysiology and evolutionary genetics, ecological parasitology, environmental pressure and conservation. those reports can't hide all fresh advancements within the ecology, behaviour and conservation of Salvelinus species, yet gathering them right into a specified quantity may still deliver awareness to present learn in this very important genus and stimulate additional paintings on Salvelinus species.
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Salvelinus species are the most completely studied teams of fishes. Many purposes clarify this severe curiosity in charr biology. Charrs have a Holarctic distribution encompassing many Asian, North American, and ecu nations and occupy various marine and freshwater environments. additionally, the present distribution of charr contains parts that have been at once stimulated via weather and topographic swap linked to the numerous Pleistocene glaciations.
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Additional info for Ecology, behaviour and conservation of the charrs, genus Salvelinus
Zone, but many moved up to the littoral zone. The pelagic density decreased to zero during the intensive fishing period, so all charr left this habitat. Cannibalism was never observed in the littoral zone before the intensive fishing (Amundsen 1994), probably because the littoral fish were too similar in size (15-23 em). This changed during the intensive fishing because small charr appeared in the littoral zone and because the increased growth produced larger charr that became cannibalistic (Amundsen 1994).
1986. Reproductive hahitat and behaviour of anadromous Arctic charr (Salvelinus alpinus) in the Koroc River, Quebec. Naturaliste can. (Rev. Ecol. ) 113: 383-387. D. L. Parrish. 1998. Atlantic salmon (Salmo salar) in winter: 'the season of parr discontent'? Can. J. Fish. Aquat. Sci. 55(Suppl. 1): 161-180. Curry, RA. G. Noakes. 1995. Groundwater and the selection of spawning sites by brook tront (Salvelinus fontinalis). Can. J. Fish. Aquat. Sci. 52: 1733-1740. G. B. Morgan. 1995. Groundwater and the incubation and emergence of brook trout (Salvelinus fontinalis).
We investigated the habitat, growth, size and age distributions, and feeding of Arctic charr for 10 years after the intensive fishing and discuss the results for the entire 20-year period from 1980 to 1999. We also studied the populations ofbrown trout and sticklebacks and some important species of planktonic and benthic crustaceans. 1. and 69"N in the M81selv River system, North Norway (Klemetsen et al. 1989). 3 metric tons) were removed by intensive fishing with baited funnel traps (see Amundsen et al.
Ecology, behaviour and conservation of the charrs, genus Salvelinus by Pierre Magnan, Céline Audet, Hélène Glémet, Michel Legault, Marco A. Rodríguez, Eric B. Taylor