Catchability of Atlantic salmon at high water temperatures: Implications for river closure temperature thresholds to catch and release angling

2020 ◽  
Author(s):  
Travis E. Van Leeuwen ◽  
Brian Dempson ◽  
David Cote ◽  
Nicholas I. Kelly ◽  
Amanda E. Bates
Keyword(s):  
Atlantic Salmon ◽  
High Water ◽  
Closure Temperature ◽  
Catch And Release ◽  
Temperature Thresholds

scholarly journals The effect of catch-and-release angling at high water temperatures on behaviour and survival of Atlantic salmon Salmo salar during spawning migration

2015 ◽  
Vol 87 (2) ◽  
pp. 342-359 ◽  
Author(s):  
T. B. Havn ◽  
I. Uglem ◽  
Ø. Solem ◽  
S. J. Cooke ◽  
F. G. Whoriskey ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
High Water ◽  
Spawning Migration ◽  
Catch And Release ◽  
Atlantic Salmon Salmo Salar

scholarly journals Mortality of Atlantic salmon after catch and release angling: assessment of a recreational Atlantic salmon fishery in a changing climate

2020 ◽  
Vol 77 (9) ◽  
pp. 1518-1528
Author(s):  
Travis E. Van Leeuwen ◽  
J. Brian Dempson ◽  
Chantelle M. Burke ◽  
Nicholas I. Kelly ◽  
Martha J. Robertson ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Climate Warming ◽  
Human Activities ◽  
Population Level ◽  
High Water ◽  
Published Data ◽  
Recreational Fisheries ◽  
Catch And Release ◽  
Salmon Fishery

Human activities have the potential to accelerate population-level decline by contributing to climate warming and decreasing the capacity of species to survive warming temperatures. Here we build a predictive model to test interactions between river warming and catch and release mortality in recreational fisheries for Atlantic salmon (Salmo salar) by compiling and analyzing published data. We then test whether warming has occurred in rivers where angling occurs and whether angling opportunities have been restricted through increased river closures due to high water temperatures. We find that catch and release mortalities are low (<0.05) at cool river temperatures (<12 °C). At river temperatures often leading to fishery closures (between 18 and 20 °C), mortalities range from 0.07 to 0.33 (mean = 0.16). River temperatures on the east and southeast coasts of Newfoundland have warmed, leading to an increase in fishery closures in recent years. By contrast, river temperatures in southern Labrador have warmed slightly, with only one documented river closure. Accordingly, increasing temperatures will increase the frequency of river closures and likely result in higher mortality in caught and released Atlantic salmon in rivers that remain open to catch and release angling at warm water temperatures.

scholarly journals Influence of the dietary protein:lipid ratio and fish oil substitution on fatty acid composition and metabolism of Atlantic salmon (Salmo salar) reared at high water temperatures

2010 ◽  
Vol 105 (7) ◽  
pp. 1012-1025 ◽  
Author(s):  
Vasileios Karalazos ◽  
Eldar Å. Bendiksen ◽  
James R. Dick ◽  
Douglas R. Tocher ◽  
John Gordon Bell
Keyword(s):  
Fatty Acid ◽  
Atlantic Salmon ◽  
Fish Oil ◽  
Salmo Salar ◽  
Protein Level ◽  
Interactive Effect ◽  
High Water ◽  
Interactive Effects ◽  
Fa Composition ◽  
Oil Source

A factorial, two-way, experimental design was used for this 10-week nutritional trial, aiming to elucidate the interactive effects of decreasing dietary protein:lipid level and substitution of fish oil (FO) with rapeseed oil (RO) on tissue fatty acid (FA) composition and metabolism of large Atlantic salmon (Salmo salar L.) reared at high water temperatures (sub-optimal, summer temperatures: 11·6°C). The six experimental diets were isoenergetic and formulated to include either FO or RO (60 % of the added oil) at three dietary protein:lipid levels, specifically (1) 350 g/kg protein and 350 g/kg lipid, (2) 330 g/kg protein and 360 g/kg lipid, (3) 290 g/kg protein and 380 g/kg lipid. Final weight, specific growth rate and thermal growth coefficient were positively affected by the dietary RO inclusion at the expense of FO, while no significant effects were seen on growth due to the decreasing protein level. The oil source had a significant effect on muscle and liver FA composition. However, the changes in muscle and liver FA indicate selective utilisation or retention of individual FA and moderate reductions in tissue EPA and DHA. Pyloric caeca phospholipid FA composition was significantly affected by the two factors and, in some cases, significant interactions were also revealed. Liver and red muscle β-oxidation capacities were significantly increased due to RO inclusion, while an interactive effect of protein level and oil source was shown for white muscle β-oxidation capacity. The results could explain, at least partially, the better performance that was shown for the RO groups and the enhanced protein-sparing effect.

Physiological effects of catch and release angling in Atlantic salmon (Salmo salar) at different stages of freshwater migration

1996 ◽  
Vol 53 (9) ◽  
pp. 2036-2043 ◽  
Author(s):  
M.A. Brobbel ◽  
M.P. Wilkie ◽  
K. Davidson ◽  
J.D. Kieffer ◽  
A.T. Bielak ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Physiological Effects ◽  
Catch And Release

Impact of catch-and-release practices on behavior and mortality of Atlantic salmon (Salmo salar L.) kelts

2010 ◽  
Vol 105 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Elina Halttunen ◽  
Audun H. Rikardsen ◽  
Eva B. Thorstad ◽  
Tor F. Næsje ◽  
Jenny L.A. Jensen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Catch And Release ◽  
Atlantic Salmon Salmo Salar

Use of simulation approaches to evaluate the consequences of catch-and-release angling on the migration behaviour of adult Atlantic salmon (Salmo salar)

2016 ◽  
Vol 333 ◽  
pp. 43-50 ◽  
Author(s):  
Robert J. Lennox ◽  
Steven J. Cooke ◽  
Ola H. Diserud ◽  
Torgeir B. Havn ◽  
Martin R. Johansen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Catch And Release ◽  
Atlantic Salmon Salmo Salar ◽  
Migration Behaviour

Impact of high water carbon dioxide levels on Atlantic salmon smolts (Salmo salar L.): Effects on fish performance, vertebrae composition and structure

Aquaculture ◽  
2006 ◽  
Vol 261 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Laura Gil Martens ◽  
P. Eckhard Witten ◽  
Sveinung Fivelstad ◽  
Ann Huysseune ◽  
Bjarte Sævareid ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
High Water ◽  
Composition And Structure ◽  
Carbon Dioxide Levels ◽  
Fish Performance

scholarly journals No environmental effect on vaccine-induced reduced growth in Atlantic salmon Salmo salar smolts

2020 ◽  
Vol 12 ◽  
pp. 327-338
Author(s):  
TWK Fraser ◽  
PG Fjelldal ◽  
I Sommerset ◽  
T Søfteland ◽  
O Høstmark ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Metabolic Rate ◽  
Water Temperature ◽  
Body Mass ◽  
Salmo Salar ◽  
Environmental Conditions ◽  
Common Garden ◽  
High Water ◽  
Total N ◽  
Sea Cage

Oil-adjuvanted vaccines reduce long-term growth in farmed Atlantic salmon Salmo salar, possibly via an increase in metabolic rate due to the energetic demands of the immune system. We tested this hypothesis by comparing sham-vaccinated to vaccinated smolts (total n = 2096, ca. 80 g) under different scenarios of water temperature (12 vs. 17°C, n = 1048 per temperature) and oxygen (O2) saturation (60, 70, 80, and 100%, n = 524 per O2 saturation level) in order to manipulate metabolic rate and O2 availability. We expected a more severe vaccination effect under conditions of high water temperature and low O2 saturation. Groups were kept in duplicate tanks under controlled temperature and hypoxia conditions for 7 wk post-vaccination before being transferred to uncontrolled common-garden natural conditions for 5 mo in a sea-cage. Body mass and length were recorded at the initiation and end of the controlled and uncontrolled environmental conditions. Vaccination and low O2 saturation at 17°C significantly reduced body mass (13 and 3% through vaccination and 9 and 20% through 60% O2 saturation at the end of the tank and sea-cage periods, respectively). However, there was no interaction between vaccination, temperature, and O2 saturation at the end of the tank or sea-cage period, lending no support to our hypothesis. A secondary observation was that emaciated ‘loser’ fish were mainly associated with the 17°C and low (mainly 60%) O2 saturation treatment. In conclusion, although vaccination led to a reduction in body mass, this effect was not influenced by environmental conditions expected to alter metabolic rate.

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