ISSN:
1365-2109
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract. Effects of four types of habitat improvement structures have been evaluated in Låktabäcken Creek, a steep and infertile brown trout, Salmo trutta L., stream in Northern Sweden. Boulder dams proved to be the most efficient structure, increasing brown trout densities by up to three times and standing crop by up to five times their original values. Log deflectors gave similar effects on standing crop while boulder groupings and boulder deflectors seemed to be inefficient. Older/larger fish were primarily favoured. No increase in growth or enhanced condition has been registered. Obviously, profitable stream positions for older fish were lacking in Läktabäcken Creek. An increase in the amount of cover and an increase in the winter survival might be secondary effects of alterations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2109.1989.tb00373.x
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