Threshold values of river discharge and temperature for anglers' catch of Atlantic salmon, Salmo salar L.
Abstract The catch by anglers of adult Atlantic salmon, Salmo salar L., was studied over a 5‐year period in the River Gaula, Norway. Atlantic salmon were caught over a wide range (23–570 m 3 s −1 ) of the observed extent of river discharge (13–950 m 3 s −1 ) and throughout the range of temperature (...
| Published in: | Fisheries Management and Ecology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1999
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1365-2400.1999.tb00083.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2400.1999.tb00083.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2400.1999.tb00083.x |
| Summary: | Abstract The catch by anglers of adult Atlantic salmon, Salmo salar L., was studied over a 5‐year period in the River Gaula, Norway. Atlantic salmon were caught over a wide range (23–570 m 3 s −1 ) of the observed extent of river discharge (13–950 m 3 s −1 ) and throughout the range of temperature (4–23 °C), but both factors strongly affected catch rate. Significant correlations between the number of Atlantic salmon caught daily, and water temperature ( r = 0.33) and river discharge ( r = −0.42) were found in 1987 and 1989, respectively. The highest daily catch occurred between 50 and 150 m 3 s −1 , and at temperatures between 13 and 16 °C. Threshold values for water discharge and temperature were found to exist at 250 m 3 s −1 and 8 °C, with the highest catches below and above these values, respectively. |
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