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Process-based modelling of decadal trends in growth, survival, and smolting of wild salmon (Salmo salar) parr in a Scottish upland stream

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Figure

Fig. 1. Spawning and emigration in the Girnock Burn between1967 and 2003. (a) Adult female spawners, with grilse indicated bythe dotted line and multi-sea-winter fish indicated by the solid line.(b) Total emigrant production (solid line), with younger emigrants(river age at emigration <2.5 years) shown by the dotted line andolder emigrants (river age at emigration >2.5 years) shown by thebroken line.
Fig. 2. Trends in emigrant size and age by cohort (year of hatch) between 1967 and 2003
Fig. 3. Historical stock–fry relationship. This figure shows total frynumbers (circles) in the Girnock Burn above the smolt trap, esti-mated from electrofishing surveys, against total numbers of femalespawners (grilse plus multi-sea-winter females)
Fig. 4. Monthly average temperatures at Littlemill on the Girnock Burn from 1966 to 2005
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