Electric Fish Handling Gloves Provide Effective Immobilization and Do Not Impede Reflex Recovery of Adult Largemouth Bass

Ward, Taylor D.; Brownscombe, Jacob W.; Gutowsky, Lee F.G.; Ballagh, Robert H.; Sakich, Nicholas; McLean, Daniel G.; Quesnel, Geneviѐve; Gambhir, Sahil; O’Connor, Constance M.; Cooke, Steven J.

doi:10.1080/02755947.2017.1303558

Cited by 21 publications

(23 citation statements)

References 35 publications

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“…Opercular rates of Bluegills did not differ significantly among electrosedation treatments and the control (Figure A), which is consistent with the findings of Ward et al. (). However, Largemouth Bass that were exposed to FHGs and the PES had significantly lower opercular rates than those in the control treatment during simulated surgery (Figure B); after treatment, their opercular rates increased toward the rate observed in the control group.…”

Section: Discussionsupporting

confidence: 91%

Comparing Immobilization, Recovery, and Stress Indicators Associated with Electric Fish Handling Gloves and a Portable Electrosedation System

et al. 2018

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Fish sedation facilitates safer handling of fish during scientific research or fisheries assessment practices, thus limiting risk of injury to fish and reducing stress responses. In recent years, there has been growing interest in using electricity to sedate fish; two methods include (1) lower‐voltage, non‐pulsed‐DC fish handling gloves (FHGs) that tend to only sedate fish while the gloves are touching the animal; and (2) a comparatively high‐voltage, pulsed‐DC Portable Electrosedation System (PES) that leads to galvanonarcosis. This study compared the physiological consequences of exposure to FHGs and PES in teleost fish. Bluegills Lepomis macrochirus and Largemouth Bass Micropterus salmoides were exposed to FHGs, PES, or a handling control for a 3‐min simulated surgery. Blood was then sampled at 0.5 and 4.5 h postexposure and was analyzed for blood glucose, blood lactate, and plasma cortisol concentrations. Opercular rates were monitored during surgery, at 2 min postsurgery, and 0.5 h postsurgery. At 24 h postsurgery, time to exhaustion (via a standardized swimming chase protocol) was assessed. Fish exposed to FHGs tended to exhibit lower opercular rates than fish that were sedated with the PES during simulated surgery. Cortisol levels of Largemouth Bass treated with FHGs were higher than those of fish sedated with the PES. Glucose levels recorded for Bluegills at 4.5 h postsurgery were higher with FHGs than with the PES. In both species, lactate was lower for fish treated with FHGs than for those treated with the PES. At 24 h posttreatment, Bluegills sedated with FHGs exhibited a longer time to exhaustion than those subjected to the PES, whereas Largemouth Bass sedated with the PES exhibited a longer time to exhaustion than those sedated with FHGs. Physiological responses to treatments were inconsistent between species. Further investigation to determine the optimal electrosedation method is required.

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Section: Discussionsupporting

confidence: 91%

Comparing Immobilization, Recovery, and Stress Indicators Associated with Electric Fish Handling Gloves and a Portable Electrosedation System

et al. 2018

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“…Baseline hematocrit was within the reported range for other centrarchid species (Furimsky et al 2003;McConnachie et al 2012;Ward et al 2017) and esociformes (Colotelo et al 2013;Pullen et al 2017). Traditionally, hematocrit has been used as a metric of respiratory distress because it often increases under conditions of limited oxygen availability (Randall 1982;Fange 1992).…”

Section: Hematocrit Responsesmentioning

confidence: 52%

Are 3 minutes good enough for obtaining baseline physiological samples from teleost fish?

et al. 2018

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A prerequisite to studying the physiological status of wild animals is the ability to obtain blood samples that reflect the condition prior to capture or handling. Based on research in avian taxa, it is recommended that such samples be obtained within 3 min of capture; however, this guideline has not been validated in wild teleosts. The present study addresses the time course of physiological changes in a number of blood metrics across six species of freshwater fish. Fishes were caught using a standardized angling protocol and held in a water-filled trough prior to the collection of a blood sample, via caudal phlebotomy, between 0.5 and 11 min after capture. Changes in whole-blood glucose and lactate concentrations, hematocrit, and plasma cortisol concentrations were assessed. Change-point analyses indicated that blood lactate concentrations and hematocrit did not deviate from baseline values until ∼2–5 min of handling for all species, whereas blood glucose concentrations generally did not deviate significantly from baseline over the 11 min test period. In all species, plasma cortisol concentrations began to increase above baseline between ∼4 and 8 min after capture. Thus, to ensure that blood samples are representative of baseline conditions across multiple metrics, we recommend that sampling be limited to less than 2 min in teleost fishes.

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“…All fish were handled with electroimmobilization gloves (Roscoe Medical TENS 3000 unit, DT3002, low‐voltage setting; as per Ward et al. ) and were implanted with two visible implant elastomer (VIE) tags for treatment group and individual identification prior to anesthetization for sham and tagged fish. The VIE tags were administered with handheld, 0.3‐mL tuberculin syringes (29‐gauge needle) coupled with syringe holders.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Tag Retention, Healing, Growth, and Behavior in Age‐0 Muskellunge Following Acoustic Transmitter Implantation

Walton‐Rabideau

Newell²,

Jeanson

et al. 2019

N American J Fish Manag

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The development of small acoustic transmitters has enabled researchers to monitor earlier life stages and smaller fish species than was previously possible. The underlying assumptions of any telemetry study are minimal tag loss and negligible effects on the behavior, survival, and growth of tagged individuals. To that end, tag retention, healing, survival, specific growth rates, and behavior were evaluated for 96 age-0 Muskellunge Esox masquinongy (TL [mean ± SD] = 205 ± 10 mm) from three treatment groups. Tagged fish were compared to untagged controls and sham fish (fish that had undergone anesthesia and laparotomy but not transmitter implantation). Thirtytwo fish (tagged group) were implanted with one of the smallest commercially available acoustic transmitters (Juvenile Salmon Acoustic Telemetry tag; 12.0 × 5.3 × 3.7 mm, 0.217 g in air, >120-d tag life) and monitored in a 4-month, overwinter tank experiment. Tricaine methanesulfonate was used for anesthesia, incisions were closed with a synthetic absorbable monofilament, and all surgeries were conducted by a single trained researcher. All tags were retained throughout the experiment; surgical wounds healed within 30 d, 32% of sutures were retained at 120 d postsurgery, and survival did not differ between treatments. No biologically significant effects of tagging on mean relative growth rates (percent change in weight/d) were observed among the three groups (tagged, untagged, and sham fish) at 4 months postprocessing. The reaction of tagged fish to a moving object within 15 minutes after tagging was slower than the reaction at 7 d postsurgery, reiterating the importance of testing appropriate sedation methods prior to releasing fish in field studies. Results validate the utility of surgical implantation of small acoustic transmitters in juvenile Muskellunge for future studies, although immobilization methods for early life stages require further study.

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Electric Fish Handling Gloves Provide Effective Immobilization and Do Not Impede Reflex Recovery of Adult Largemouth Bass

Cited by 21 publications

References 35 publications

Comparing Immobilization, Recovery, and Stress Indicators Associated with Electric Fish Handling Gloves and a Portable Electrosedation System

Comparing Immobilization, Recovery, and Stress Indicators Associated with Electric Fish Handling Gloves and a Portable Electrosedation System

Are 3 minutes good enough for obtaining baseline physiological samples from teleost fish?

Evaluation of Tag Retention, Healing, Growth, and Behavior in Age‐0 Muskellunge Following Acoustic Transmitter Implantation

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