全球智库信息集成服务系统(G2TT): High variability in spawning migration of sea trout, Salmo trutta, in two northern Swedish rivers.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1111/j.1365-2400.2010.00774.x
	High variability in spawning migration of sea trout, Salmo trutta, in two northern Swedish rivers.
	Oestergren J; Lundqvist H; Nilsson J
发表日期	2011
出处	Fisheries Management and Ecology 18 (1): 72-82
出版年	2011
语种	英语
摘要	Telemetry was used to examine spawning migration of sea trout, Salmo trutta L. (n = 126), in two rivers in northern Sweden. The spawning areas defined by radio-tagged fish differed between the river systems. In the River Vindelaelven, sea trout spawned in the main stem and 80% of tagged individuals returned to areas where hatchery-reared juveniles had been previously stocked. In the River Piteaelven, 74% of tagged sea trout ascended tributaries for spawning. Tagged fish were categorised into three groups of migratory pattern. CART (classification and regression tree) analysis indicated that distance from tagging location to spawning site (Sdist) explained the migratory patterns. Large Sdist separated fish with stepwise upstream migration from those with up- and downstream migrations and one-directional direct migration. Fish tagged early in the season migrated the longest distance to spawning areas. Stocking locations and sex explained the large search behaviour up- and downstream in the rivers. The findings are important for the sustainable management of sea trout in the Gulf of Bothnia.
主题	Evolution and Ecology (EEP)
关键词	Hatchery Homing Human impact Radio-tagging Salmonid Water temperature
URL	http://pure.iiasa.ac.at/id/eprint/9637/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/129346
推荐引用方式 GB/T 7714	Oestergren J,Lundqvist H,Nilsson J. High variability in spawning migration of sea trout, Salmo trutta, in two northern Swedish rivers.. 2011.