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Please use this identifier to cite or link to this item: http://hdl.handle.net/10793/135

Title: Population specific smolt development, migration and maturity schedules in Atlantic salmon in a natural river environment
Authors: McGinnity, P
deEyto, E
Cross, T F
Coughlan, J
Whelan, K
Ferguson, A
Keywords: common garden experiment
parr migration
Salmo salar
smoltification
Issue Date: 2007
Publisher: Elsevier
Citation: Philip McGinnity, Elvira de Eyto, Thomas F. Cross, Jamie Coughlan, Ken Whelan, Andy Ferguson, Population specific smolt development, migration and maturity schedules in Atlantic salmon in a natural river environment, Aquaculture, Volume 273, Issues 2-3, Smolt 2005: Proceedings of the 7th International Workshop on Salmonid Smoltification, 18 December 2007, Pages 257-268
Series/Report no.: Aquaculture;273 (2-3)
Abstract: Identifying differences in quantitative life history traits between cultured and native or non-native wild populations is important in assessing the impact of accidental and deliberate introductions of hatchery-reared fish into the wild. As the ability to exploit the marine environment is the defining life history characteristic of anadromous salmonids, knowledge of variation in smoltification characteristics among populations is crucial in determining how these introductions affect fitness in recipient populations. Data are presented here describing the timing and extent of the autumn migration; the propensity for male parr maturation; the timing of the spring migration; and the size of autumn and spring migrants from Atlantic salmon (Salmo salar) populations from various genetic backgrounds. These experiments were carried out under common garden conditions over a decade in the Srahrevagh River in the west of Ireland. Population specific genetically determined differences in quantitative life history traits associated with smoltification were apparent. These differences may reflect smolt quality and therefore impact on marine survival and ultimately lifetime fitness. Both hatchery domestication and geography (different selective environments) were found to be important factors determining smolt phenotypes, although it was difficult to measure the relative contribution of each. These results indicate that farm, native hatchery, non-native wild salmon (even from a neighbouring catchment) and their hybrids with native wild fish, are likely to produce less well adapted and thus poorer quality smolts than native wild populations and, where wild populations are extant, such stocks should not be used for enhancement purposes.
Description: NOTICE: this is the author’s version of a work that was accepted for publication in Aquaculture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquaculture, [Volume 273, Issues 2-3, (December 2007)] doi:10.1016/j.aquaculture.2007.10.008 http://www.sciencedirect.com/science/article/pii/S0044848607009428
peer-reviewed
URI: http://hdl.handle.net/10793/135
http://dx.doi.org/10.1016/j.aquaculture.2007.10.008
ISSN: 0044-8486
Appears in Collections:Peer Reviewed Scientific Papers

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