Electrophoretic evaluation of a supplemental stocking programme for brown trout, Salmo trutta L.

Electrophoretic evaluation of a supplemental stocking programme for brown trout, Salmo trutta L. Abstract. Over a 15‐year period hatchery brown trout, Salmo trutta L., have been added 10 Lower Lough Erne, Northern Ireland to supplement declining native populations. Introductions have mainly comprised eyed ova and fingerlings, stocked into a number of rivers in the Erne drainage. Utilizing a natural genetic tag an electrophoretic assessment of the stocking programme was undertaken. The percentage hatchery genetic contribution in trout populations varied widely from river to river (19%‐91%). Lough‐caught brown trout (3+ and older) showed a substantial (21·5%) hatchery genetic component. Introgression of native‐and hatchery stocks was evident. The resultant deleterious genetic consequences for the conservation of the unique Lough Erne brown trout gene pool arc discussed and alternative management strategies are proposed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquaculture Research Wiley

Electrophoretic evaluation of a supplemental stocking programme for brown trout, Salmo trutta L.

Aquaculture Research, Volume 17 (2) – Apr 1, 1986

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Publisher
Wiley
Copyright
Copyright © 1986 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1355-557X
eISSN
1365-2109
D.O.I.
10.1111/j.1365-2109.1986.tb00097.x
Publisher site
See Article on Publisher Site

Abstract

Abstract. Over a 15‐year period hatchery brown trout, Salmo trutta L., have been added 10 Lower Lough Erne, Northern Ireland to supplement declining native populations. Introductions have mainly comprised eyed ova and fingerlings, stocked into a number of rivers in the Erne drainage. Utilizing a natural genetic tag an electrophoretic assessment of the stocking programme was undertaken. The percentage hatchery genetic contribution in trout populations varied widely from river to river (19%‐91%). Lough‐caught brown trout (3+ and older) showed a substantial (21·5%) hatchery genetic component. Introgression of native‐and hatchery stocks was evident. The resultant deleterious genetic consequences for the conservation of the unique Lough Erne brown trout gene pool arc discussed and alternative management strategies are proposed.

Journal

Aquaculture ResearchWiley

Published: Apr 1, 1986

References

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