The age and growth of juvenile brown trout in Loch Leven, Kinross, Scotland

Arawomo, G.A.O.

Archiv fur Hydrobiologie 93(4): 466-483


ISSN/ISBN: 0003-9136
Accession: 006598170

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The age and growth of juvenile trout in Loch Leven were determined from the fish scale studies. Of the 363 specimens studied among the loch trout, 55.9% were 1-migrants, 37.2 and 6.9% were 2- and 3-migrants, respectively. Growth in length and weight differed between 1-, 2- and 3-migrants. Fast growth in Loch Leven feeder streams was responsible for the high proportion of early migrants of juvenile trout into the loch. All migrant groups showed a faster growth during their 1st loch year. Compared with other lochs, growth of juvenile trout in Loch Leven was good and this was linked with the high productivity of the loch and the area of loch habitat relative to that of nursery stream habitat.