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Table 2 Overview of historical and contemporary Sognefjord veteran migrant brown trout scale samples, from which the 1st / 2nd sea age specific growth (\({g}_{SW1}\) and \({g}_{SW2}\), respectively) were estimated. The number of tagged fish, for which marine migration distance and behaviour data was collected (derived by acoustic telemetry) is also stated

From: Balancing risks and rewards of alternate strategies in the seaward extent, duration and timing of fjord use in contemporary anadromy of brown trout (Salmo trutta)

River:

Aurland

Lærdal

Årdal

Fortun

Sampling period: (years)

Present

2012—2013

Past

1952—1970

Present

2009—2014

Present

2013

Present

2013

N sampled:

(Mean TL, range)

24

(44.6, 32—72)

195

(55.5, 30—94)

140

(47.9, 22—92)

17

(41.0, 34—52)

15

(52.0, 29—81)

N fish tagged:

(Mean TL, range)

24

(44.6, 32—72)

NA

84

(42.9, 22—74)

17

(41.0, 34—52)

15

(52.0, 29—81)

\({g}_{SW1}\): Mean ± SD (N)

0.580 ± 0.146 (23)

0.675 ± 0.170 (193)

0.703 ± 0.172 (115)

0.702 ± 0.142 (17)

0.696 ± 0.134 (14)

\({g}_{SW2}\): Mean ± SD (N)

0.408 ± 0.093 (12)

0.394 ± 0.110 (169)

0.380 ± 0.132 (63)

0.413 ± 0.169 (3)

0.442 ± 0.179 (8)

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BMC Ecology and Evolution

ISSN: 2730-7182

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