Injury and immediate mortality associated with recreational troll capture of bull trout (Salvelinus confluentus) in a reservoir in the Kootenay-Rocky Mountain region of British Columbia

Gutowsky, Lee F.G.; Harrison, Phil; Landsman, Sean J.; Power, Michael; Cooke, Steven J.

doi:10.1016/j.fishres.2011.02.022

Cited by 22 publications

(23 citation statements)

References 30 publications

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“…During the study period, reservoir levels reached maximum elevation (754 m) on 4 November 2011 and the reservoir was drawn down to a minimum level (722 m) on 21 April 2011. Further details about the study site have been described (Gutowsky et al , , ; Harrison et al , , ; Martins et al , , ).…”

Section: Methodsmentioning

confidence: 99%

Temporal plasticity in thermal‐habitat selection of burbot Lota lota a diel‐migrating winter‐specialist

Harrison

Gutowsky

Martins

et al. 2016

Journal of Fish Biology

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In this study, animal-borne telemetry with temperature sensors was coupled with extensive habitat temperature monitoring in a dimictic reservoir, to test the following hypotheses: behavioural thermoregulation occurs throughout the year and temperature selection varies on a diel and seasonal basis, in a winter-specialist diel-migrating fish. Burbot Lota lota demonstrated nightly behavioural thermoregulation throughout the year, with a large seasonal shift between selection for very cold temperatures (<2° C) optimal for reproduction during the spawning period and selection for warmer temperatures (12-14° C) optimal for hunting and feeding during non-reproductive periods. During daylight hours, while L. lota avoided habitats warmer than optimal for reproduction and feeding during the spawning and non-reproductive periods, respectively, active selection was limited to selection for 4-6° C habitat during the prespawning period. Although behavioural thermoregulation explained the night-time migration, behavioural thermoregulation only partially explained daytime behaviour, indicating that diel migration is best explained by a combination of factors. Thus, thermal-habitat selection was a good predictor of night-time habitat occupancy in a diel-migrating species. Together, these results show that thermal-habitat selection by fishes may be important throughout the year and a more seasonally plastic behaviour than previously recognized.

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Section: Methodsmentioning

confidence: 99%

Temporal plasticity in thermal‐habitat selection of burbot Lota lota a diel‐migrating winter‐specialist

Harrison

Gutowsky

Martins

et al. 2016

Journal of Fish Biology

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“…Bull trout, a species of high recreational value (Gutowsky, Harrison, Landsman, Power, & Cooke, 2011) are threatened throughout much of their western North American range (Post & Gow, 2012). Bull trout are often found in hydropower reservoirs of western Canada and the north-western USA.…”

Section: Entrainment Vulnerability Of Bull Troutmentioning

confidence: 99%

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

et al. 2019

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Potadromous fishes are vulnerable to involuntary entrainment through hydropower turbines. However, turbines can also provide a downstream passage route for potadromous fish. Here, we review evidence for turbine entrainment and passage in potadromous fish, and evaluate the effects of these processes on upstream and downstream populations. We develop conceptual frameworks and metrics to quantify vulnerability to turbine entrainment removals, and to quantify the efficiency of turbines as a downstream passage route. We highlight factors that influence these processes and provide case‐studies demonstrating their applicability. We found that juvenile potadromous fish are being entrained through turbines at rates high enough to impact upstream populations. Given that juvenile passage survival is often high, we argue that turbines provide an important downstream passage route for potadromous fish. We show that entrainment vulnerability is likely a function of interactions between in‐reservoir fish behaviour, habitat configuration and operations and thus not well captured by passage mortality estimates. Similarly, we show that while passage mortality can limit downstream passage efficiency, passage success is also dependent on reservoir and forebay navigation, along with survival and fitness in the downstream river. We advocate for a shift in focus away from estimates of passage mortality and injury, which have previously accounted for the majority of turbine passage research. Instead, we recommend an approach that focusses on quantification of the factors that influence downstream passage efficiency and entrainment vulnerability. Moreover, we highlight the need to better understand the broader scale impacts of these events on upstream and downstream populations.

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“…Fish were scored for the presence of injury using a standardised objective scoring system, where a score of 0 indicated no discernible injury; a score of 1 indicated a minor injury such as minor tearing of tissue (i.e. <5 mm in length, including any visible tissue tear or abrasion resulting from hooking); a score of 2 indicated moderate injury such as the presence of bleeding, bruising or a tissue tear >5 mm in length; and a score of 3 indicated major injury, such as ocular or gill damage with significant pulsatile bleeding (as per Gutowsky et al 2011). A standardised scoring system was also applied to describe the ease of hook removal, where a score of 0 referred to a hook that was removed easily and immediately (i.e.…”

Section: Rapid Assessment Protocolsmentioning

confidence: 99%

Rapid assessment of the physiological impacts caused by catch‐and‐release angling on blue‐finned mahseer (Tor sp.) of the Cauvery River, India

Bower

Danylchuk

Raghavan

et al. 2016

Fisheries Management Eco

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Forty‐nine blue‐finned mahseer (Tor sp.; mean total length 458 ± 20 mm) were angled using a range of bait/lure types, angling and air exposure times in water that averaged 27 ± 2 °C over the course of the assessment. No cases of mortality were observed, and rates of moderate and major injury were low, with 91% of mahseer hooked in the mouth. More extreme physiological disturbances (i.e. blood lactate, glucose, pH) in mahseer were associated with longer angling times. Sixteen fish (33%) exhibited at least one form of reflex impairment. Moreover, longer air exposures and angling times resulted in significant likelihood of reflex impairment. Findings suggest that blue‐finned mahseer are robust to catch‐and‐release, but that anglers should avoid unnecessarily long fight times and minimise air exposure to decrease the likelihood of sub‐lethal effects that could contribute to post‐release mortality.

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Injury and immediate mortality associated with recreational troll capture of bull trout (Salvelinus confluentus) in a reservoir in the Kootenay-Rocky Mountain region of British Columbia

Cited by 22 publications

References 30 publications

Temporal plasticity in thermal‐habitat selection of burbot Lota lota a diel‐migrating winter‐specialist

Temporal plasticity in thermal‐habitat selection of burbot Lota lota a diel‐migrating winter‐specialist

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

Rapid assessment of the physiological impacts caused by catch‐and‐release angling on blue‐finned mahseer (Tor sp.) of the Cauvery River, India

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