Article (Scientific journals)
Annual activity cycle of adult brown trout (Salmo trutta L.): A radio-telemetry study in a small stream of the Belgian Ardenne
Ovidio, Michaël
1999In Bulletin Français de la Pêche et de la Pisciculture, (352), p. 1-18
Peer reviewed
 

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Keywords :
migration; management of population; life history strategy; weir; trout; Salmo trutta; River Meuse basin; Belgium; movement
Abstract :
[en] During a study period of 26 months, twenty trout (26.0-57.0 cm FL; 198-1,685 g) were daily located from 16 to 466 days in a small stream of the Belgian Ardenne, the Aisne stream (tributary of the river Ourthe) in order to characterize their annual pattern of mobility. Daily movements were more frequent and longer during the spawning period (October-December) than at any other time of the year. Upstream migrations (max.: 25 km) generally occurred during October and the first fortnight of November and were triggered by a combination of Variations of water temperature and water level within a thermal range of 10-14 degrees C. Spawning activity (second fortnight of November until late December) took place in the Aisne stream (max. width : 10 m) or in its small tributaries. Trout surviving spawning undertook a fast (max.:9,200 m in 24 h) and precise post reproductive homing. From winter to summer, daily movements were shorter and mainly corresponded to changes of residences within a home range of which the size was proportional to the trout's size. In March and June, some trout made long upstream unidirectional migrations of which the biological signification is still unknown. These results are discussed within the context of life history strategies and management of trout populations.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Ovidio, Michaël  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Démographie des poissons et hydroécologie
Language :
French
Title :
Annual activity cycle of adult brown trout (Salmo trutta L.): A radio-telemetry study in a small stream of the Belgian Ardenne
Publication date :
1999
Journal title :
Bulletin Français de la Pêche et de la Pisciculture
ISSN :
0767-2861
Publisher :
Conseil Supérieur de la Pêche
Issue :
352
Pages :
1-18
Peer reviewed :
Peer reviewed
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since 06 February 2009

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