Effects of Air Exposure During Simulated Catch‐and‐Release Angling on Survival and Fitness of Yellowstone Cutthroat Trout

Roth, Curtis J.; Schill, Daniel J.; Quist, Michael C.; High, Brett; Campbell, Matthew R.; Vu, Ninh V.

doi:10.1002/nafm.10262

Cited by 9 publications

(8 citation statements)

References 46 publications

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“…Air exposure up to 60 s had no effect on relative survival of Yellowstone Cutthroat Trout. This finding is consistent with many other studies that have assessed the effects of air exposure on fishes (Schreer et al 2005;Thompson et al 2008;Rapp et al 2014;Louison et al 2016;Gange et al 2017;Roth et al 2018bRoth et al , 2019. Although average fish length was relatively small (206 mm; SD ¼ 47.2) in the present study, our findings are consistent with similar studies that sampled larger Yellowstone Cutthroat Trout and other salmonids (e.g., Gale et al 2011;Roth et al 2019).…”

Section: Discussionsupporting

confidence: 93%

“…We recorded fight time (hook set to landing), type of gear (artificial lure or fly), hook location (corner of mouth, esophagus, eye, full mouth, gills, lower jaw, snout, tongue, unknown, or upper jaw), tag number, total length, and water temperature at capture. They conducted all fish processing with the fish held underwater, and did not expose fish to air until we applied the air exposure treatment (Roth et al 2018b(Roth et al , 2019. We randomly assigned the first fish caught a treatment of 0, 30, or 60 s of air exposure.…”

Section: Methodsmentioning

confidence: 99%

“…A few studies have shown negative effects of air exposure on survival (Ferguson and Tufts 1992;Gingerich et al 2007;Graves et al 2016), but these studies all have limitations that make it difficult to apply their results more broadly (i.e., laboratory environment, extended fight time, unrealistic air exposure times). The majority of air exposure studies on wild populations have found minimal or no effect on survival (e.g., Thompson et al 2008;Rapp et al 2014;Louison et al 2016;Gange et al 2017;Roth et al 2018b;Twardek et al 2018;Roth et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Air Exposure on Survival of Yellowstone Cutthroat Trout Angled from a Stream with Warm Water Temperatures

McCarrick

Roth

Schill

et al. 2019

Journal of Fish and Wildlife Management

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We evaluated the effects of air exposure on Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri caught and released in a cold-water stream with elevated water temperatures (i.e., > 14°C) in southeastern Idaho. Anglers caught fish in a 2.3-km section of Fall Creek, Idaho, during August 2018. Sampled fish remained underwater while we measured and then tagged them with T-bar anchor tags. We exposed fish to air for 0, 30, or 60 s and then released them at the point of capture. We continuously monitored temperature during the study period. Water temperatures during the study varied from 10.0 to 19.7°C and averaged 14.9°C (SE = 0.08). In total, anglers caught 161 Yellowstone Cutthroat Trout over 10 d. Of those fish, we did not expose 54 to air; we exposed 54 to air for 30 s, and 53 for 60 s. We used electrofishing to recapture tagged fish and estimate relative survival. Relative survival was highest for fish exposed to air for 60 s (0.40 [SE = 0.25]) followed by 0 s (0.35 [SE = 0.25]) and 30 s (0.30 [SE = 0.27]), but differences were not statistically significant. Results from this study are consistent with other air-exposure studies suggesting that air exposure of 60 s or less is not likely a concern in Yellowstone Cutthroat Trout fisheries. Releasing fish as quickly as possible is always encouraged, but management regulations restricting air exposure seem unnecessary given the collective body of field-based research on air exposure. Nevertheless, similar studies on other systems and species are warranted.

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Section: Discussionsupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Air Exposure on Survival of Yellowstone Cutthroat Trout Angled from a Stream with Warm Water Temperatures

McCarrick

Roth

Schill

et al. 2019

Journal of Fish and Wildlife Management

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“…() but with a much larger sample size (i.e., >2,000 adults), fight times and air exposure times typically imposed upon trout during catch‐and‐release angling events did not affect wild adult Cutthroat Trout O. clarkii survival or progeny production (Roth et al. ).…”

Section: Discussionmentioning

confidence: 99%

Effects of Fishery‐Related Fight Time and Air Exposure on Prespawn Survival and Reproductive Success of Adult Hatchery Steelhead

Whitney

Meyer

McCormick

et al. 2019

N American J Fish Manag

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In recent years, increased scrutiny has been placed on the physiological effects of exhaustive exercise and air exposure on caught‐and‐released fish. Steelhead Oncorhynchus mykiss broodstock in the South Fork Clearwater River, Idaho, were collected by anglers during a winter fishery (water temperatures of 2–5°C); this enabled fight and air exposure times to be recorded to determine their influence on prespawn survival and progeny survival to the fry stage in the hatchery. The average fight time during angling was 164 s. Air exposure was measured when anglers landed fish and again during fish transport from the river to the hatchery vehicle; the longest interval of air exposure averaged 23 s during angling and 28 s during transport. Three‐year average prespawn survival was 97.0% for 1,148 angler‐caught fish, compared to 91.9% for 3,325 swim‐in broodstock collected at the hatchery. The top mixed‐effects logistic regression model estimated that the odds of progeny survival increased by 1.027 times with each additional day of the year until an adult fish spawned; this was likely a reflection of peak spawn time in the hatchery. Fight time and air exposure time did not influence progeny survival or prespawn mortality of adult steelhead captured by anglers.

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“…We sampled a shorter study reach in October to increase the probability of recapturing fish in the air-exposure study (see below). We used the same gear and processing methods as we did for our angling survey in May 2020 but included a stress test (air-exposure treatment) to determine the effects of parasitic copepods on the shortterm survival of Rainbow Trout (Roth et al 2018(Roth et al , 2019McCarrick et al 2019). The fish were kept in the water as much as possible while processing before the air-exposure treatment.…”

Section: Impact Statementmentioning

confidence: 99%

Low‐level infection of parasitic copepods on Rainbow Trout does not affect vulnerability to angling or short‐term survival following catch‐and‐release angling

Swain‐Menzel,

Billman

2023

N American J Fish Manag

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Parasitic copepods, or “gill lice,” can negatively impact fish hosts resulting in reduction in fitness and increased probability of mortality. The purpose of our study was to determine the effect of Salmincola californiensis on the vulnerability of Rainbow Trout to recreational angling and short‐term survival after being caught and released. We compared the prevalence and intensity of infection of S. californiensis on Rainbow Trout caught while angling and with a backpack electrofisher in May and October 2020 in Birch Creek, Idaho. In October, we also conducted a stress test (i.e. air exposure treatment) on trout caught by angling to determine the effects of parasitic copepods on short‐term survival of Rainbow Trout in a catch‐and‐release fishery. Infection with S. californiensis did not influence the vulnerability of Rainbow Trout to angling. After adjusting for sample size and size distribution, prevalence of infection in May was 48.3% for Rainbow Trout caught while electrofishing compared to 49.3% for Rainbow Trout caught while angling. In October, prevalence of infection was 41.2% for Rainbow Trout caught while electrofishing compared to 41.8% for Rainbow Trout caught while angling. We did not find a difference in short‐term survival of infected and uninfected Rainbow Trout after the stress test (4 ‐7 days after the test). We did not observe consequences of infection by parasitic copepods on vulnerability to angling or short‐term survival of Rainbow Trout in Birch Creek. However, conditions (i.e. low‐level of infection and relatively small fish) may not have been conducive to detecting differences in performance metrics; further testing at higher intensity of infection and with larger fish may uncover negative impacts of parasitic copepods on Rainbow Trout.

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Effects of Air Exposure During Simulated Catch‐and‐Release Angling on Survival and Fitness of Yellowstone Cutthroat Trout

Cited by 9 publications

References 46 publications

Effects of Air Exposure on Survival of Yellowstone Cutthroat Trout Angled from a Stream with Warm Water Temperatures

Effects of Air Exposure on Survival of Yellowstone Cutthroat Trout Angled from a Stream with Warm Water Temperatures

Effects of Fishery‐Related Fight Time and Air Exposure on Prespawn Survival and Reproductive Success of Adult Hatchery Steelhead

Low‐level infection of parasitic copepods on Rainbow Trout does not affect vulnerability to angling or short‐term survival following catch‐and‐release angling

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