Abstract:
:Variation in the body morphology of juvenile brown trout Salmo trutta was studied for both wild and hatchery-reared individuals from the same gene pool. The thin-plate spline (TPS) method by pointing landmarks was used to characterize juveniles from their natal environment, the River Kuusinkijoki in eastern Finland, and from wild parents raised in a hatchery environment. Differences were found in the morphometrics of juvenile S. trutta from the two different environments. Wild S. trutta are characterized by a longer head and shorter anterior part of the trunk compared to hatchery S. trutta. Stocked to their natal river with wild S. trutta, the hatchery fish became characterized with more similar morphometrics to their wild counterparts. The characteristics of the body form are explained by the differing environmental conditions in the wild and hatchery. It is concluded that a simple hatchery environment may delay the development of morphological characteristics important in a natural river environment.
journal_name
J Fish Bioljournal_title
Journal of fish biologyauthors
Vehanen T,Huusko Adoi
10.1111/j.1095-8649.2011.03093.xsubject
Has Abstractpub_date
2011-11-01 00:00:00pages
1167-81issue
5eissn
0022-1112issn
1095-8649journal_volume
79pub_type
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