Migration of wild and hatchery reared smolts of Atlantic salmon, Salmo salar L., through lakes

Journal of Fish Biology - Tập 25 Số 5 - Trang 617-623 - 1984
Lars P. Hansen1, Bror Jönsson2, Kjell B. Døving3
1Directorate for Wildlife and Freshwater Fish, Fish Research Division, N-1432 AS-NLH, Norway
2Directorate for Wildlife and Freshwater Fish, Research Station for Freshwater Fish, Ims, N-4300 Sandnes, Norway
3Department of Biology, Division of General Physiology, University of Oslo, P.O. Box 1051 Blindern, N-0316 Oslo 3, Norway

Tóm tắt

In 1982 and 1983 descending wild Atlantic salmon smolts, Salmo salar L., were caught in a fish‐trap at the mouth of the River Imsa. Together with hatchery‐reared smolts of the River Imsa strain they were tagged and released at three different sites of the Imsa‐Lutsi watercourse: in the Imsa River 1 km above the trap, and in two lakes, 3 and 11 km upstream of the trap. The recapture‐rate in the fish‐trap decreased with increased migration distance. The hatchery‐reared smolts migrated downstream faster than wild smolts. Lake‐released smolts were considerably delayed in their downstream migration compared to the river released smolts. The results are discussed in relation to environmental and physiological parameters.

Từ khóa


Tài liệu tham khảo

10.1139/f80-108

Berg M., 1967, Release of salmon fry in lakes and tarns, Fisk og Fiskestell, 4, 1

Carlin B., 1955, Tagging of salmon smolts in the River Lagan, Rep. Inst. Freshwat. Res. Drottningholm, 36, 57

Cross T. F.&Piggins D. J.(1982).The effect of abnormal climatic conditions on the smolt run of 1980 and subsequent returns of Atlantic salmon and sea trout.I.C.E.S. C.M. 1982/M:26 pp.8.

Frantsi C. Foda A.&Ritter J. A.(1972).Semi‐natural rearing of Atlantic salmon Salmo salar in a small lake. I.C.E.S. C.M. 1972/M:15 pp.9.

Groot C., 1965, On the orientation of young sockeye salmon (Oncorhynchus nerka) during their seaward migration out of lakes, Behav. Suppl, 14, 1

Hansen L. P.(1984).Stocking streams and lakes with eggs and juveniles of Atlantic salmon Salmo salarL. InSalmo salarL.Symposium on Salmon Problems Proceedings(N.Johansson ed.) Luleå Sweden (in press).

10.1139/f76-158

Larsson P. O.(1977).The importance of time and place of release of salmon and sea trout on the results of stockings.I.C.E.S. C.M. 1977/M:42 pp.4.

10.1139/z82-236

Munro W. R.(1965).The use of hill lochs in Scotland as rearing grounds for young salmon.I.C.E.S. C.M. 1965 No 58 pp.6.

10.1111/j.1095-8649.1982.tb03923.x

Soivio A.&Virtanen E.(1982).Physiological effects of stocking stress on Baltic salmon (Salmo salar).E.I.F.A.C. Symposium on stock enhancement in the management of freshwater fisheries Budapest 1982 pp.13.

Thorpe J. E.(1983).Downstream movements of juvenile salmonids: a forward speculative view. InSalmon Migration Symposium(J. D.McCleave ed.). NATO Advanced Research Institute Acquafredda di Marahea Italy (in press).

10.1111/j.1095-8649.1978.tb04200.x

10.1111/j.1095-8649.1981.tb03820.x

Thông tin
Thông tin xuất bản

Journal of Fish Biology

Tập 25 Số 5

617-623

Thông tin tác giả