Estimating reef fish discard mortality using surface and bottom tagging: effects of hook injury and barotrauma

Rudershausen, Paul J.; Buckel, Jeffrey A.; Hightower, Joseph E.

doi:10.1139/cjfas-2013-0337

Cited by 33 publications

(58 citation statements)

References 36 publications

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“…; Rudershausen et al. , ). This postrelease mortality can result from an inability of fish to submerge.…”

mentioning

confidence: 98%

“…We worked at a depth where this species is commonly found over the continental shelf (Bacheler and Ballenger ) and where obvious barotrauma (e.g., stomach eversion) is common among individuals caught via hook and line (Rudershausen et al. ). This research provides timely information for managers who need solutions that stakeholders both find acceptable and can easily apply in their own fishing activities.…”

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confidence: 99%

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Effectiveness of Venting and Descender Devices at Increasing Rates of Postrelease Survival of Black Sea Bass

Rudershausen

Runde

Buckel

2019

N American J Fish Manag

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We tested the ability of venting and descender (recompression) devices to increase the relative survival of released Black Sea Bass Centropristis striata, a physoclistous reef species with high discard rates in hook‐and‐line fisheries that operate in the U.S. Atlantic Ocean and Gulf of Mexico. We caught fish via hook and line from waters that were 38 m deep, a depth where Black Sea Bass often exhibit signs of barotrauma and may be unable to submerge after release. Fish were conventionally tagged and vented with either an 11‐gauge cannula or a 16‐gauge needle, descended using a descender (recompression) device, or released as tagged controls (no venting or recompression). Tests of independence were used to determine the relationship between submergence and treatment (excluding recompressed fish) as well as between submergence and tag return rate. Tag‐recapture data were used to inform a Cox proportional hazards model that evaluated the survival of fish treated with each experimental device relative to the control group. A significantly greater proportion of fish submerged when treated with either venting device relative to the controls, and the fish that submerged had a greater proportion of tag returns relative to those that did not submerge. Venting and recompression increased postrelease survival compared with the controls. The results provide guidance to managers who seek methods to reduce discard mortality rates in hook‐and‐line fisheries for this important species. Future studies should examine the use of these devices at a range of depths to determine their effectiveness.

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“…; Rudershausen et al. , ). This postrelease mortality can result from an inability of fish to submerge.…”

mentioning

confidence: 98%

mentioning

confidence: 99%

Effectiveness of Venting and Descender Devices at Increasing Rates of Postrelease Survival of Black Sea Bass

Rudershausen

Runde

Buckel

2019

N American J Fish Manag

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“…Barotrauma occurs due to rapid decompression experienced during ascent and has the potential to significantly reduce the odds of survival in Red Snapper and other deepwater reef fish (Rummer and Bennett ; Rudershausen et al. ; Curtis et al. ).…”

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confidence: 99%

Recreational Angler Attitudes and Perceptions Regarding the Use of Descending Devices in Southeast Reef Fish Fisheries

et al. 2019

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Reducing discard mortality in recreational fisheries remains an important component of stock rebuilding for many reef fish species. Discard mortality for these species can be high due in part to barotrauma injury sustained during capture coupled with high catch rates, but recent advances in fish descending devices can mitigate some of these declines. Despite high survival rates with rapid recompression strategies, recreational angler opinions and perceived effectiveness of the devices are relatively unknown. This study surveyed the perceptions, opinions, and attitudes of 538 recreational anglers regarding the use of descending devices in the reef fish fisheries of the Gulf of Mexico and U.S. South Atlantic, with particular emphasis on Red Snapper Lutjanus campechanus. In total, 1,074 descending devices were distributed to marine recreational anglers from North Carolina to Texas. After using the device for an average of 8 months and 15 fishing trips, recipients completed a questionnaire assessing their perceptions on the efficacy of the device. While 72% of respondents had little to no knowledge of descending devices prior to the study, 70% indicated that they preferred this release method over venting after the study. Survey respondents released over 7,000 Red Snapper and 4,000 other reef fish species with their descending devices, and 76% were likely to continue employing the device on their vessel. Eighty‐nine percent of respondents believed descending Red Snapper would significantly reduce discard mortality in the recreational fishery. We discovered that recreational anglers perceive the devices to be highly useful in reducing discard mortality and are willing to employ them when releasing reef fish experiencing barotrauma. Other studies have demonstrated that these descending devices do reduce discard mortality of reef fishes, and this study indicates that recreational anglers are very willing to use them as a conservation tool.

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“…Although discarded and landed fish are largely subjected to the same process, landed fish are slaughtered, whereas discarded fish are exposed to air and subsequently returned to the water where these fish are vulnerable to predation (Drumhiller et al, 2014, Olla et al, 1997. Mortality of fish landed by trawls, purse seines and seines is higher than mortality of fish landed by gillnets (Benoît et al, 2010), hooks (Benoît et al, 2010, Davis and or traps (Rudershausen et al, 2014). This higher mortality for trawls, purse seines, seines and gillnets is likely explained by the higher occurrence of scale, skin and fin injuries in these gear types as compared to hooks and traps, commonly resulting in higher mortality (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Thunnus obesus Swordfish Xiphias gladius Richards et al (1995) Pacific halibut Hippoglossus stenolepis Rudershausen et al (2008) Black sea bass Centropristis striata Rudershausen et al (2014) Black sea bass Centropristis striata Smith and Scharf (2011) Southern flounder Paralichthys lethostigma Stachura et al (2012) Sablefish Anoplopoma fimbria Stein et al (2004) Atlantic sturgeon Acipenser oxyrinchus Stephen and Harris (2010) Bank sea bass Ocyurus chrysurus Stewart (2008) Snapper Pagrus auratus Suuronen et al (1996a) Herring Clupea harengus Suuronen et al (1996b) Cod Gadus morhua Suuronen et al (1996c) Herring Clupea harengus Suuronen et al (2005) Cod Gadus morhua Tenningen et al (2012) Herring Clupea harengus Turunen et al (1994) Brown trout Salmo trutta Van Beek et al (1990) Plaice …”

Section: Appendix 52mentioning

confidence: 99%

Understanding social sustainability of capture fisheries

Boer¹,

Berentsen²,

Bokkers³

et al.

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Fishing companies are faced with decreasing profitability and increasing competition. These companies can try to gain a competitive advantage by differentiating their products, e.g. by marketing new product attributes that consumers are interested in such as attributes relating to sustainability. Although consumers could be considerably interested in social sustainability of fish, this sustainability dimension has received little research interest so far. The main objective of this thesis is to understand social sustainability of capture fisheries. Social sustainability can be understood by applying the framework for social sustainability assessment, which consists of stakeholder consultation and issue selection, indicator development and quantification, and interpretation of the results, to the case considered. The case considered in this thesis was capture fisheries in the northeast Atlantic. Stakeholder consultation resulted in the identification of 27 social sustainability issues relevant for capture fisheries in the northeast Atlantic. Overall, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare were seen as more important than other social sustainability issues. Indicators were defined for the most important social sustainability issues of capture fisheries in the northeast Atlantic. To interpret values for each indicator, rubrics were developed that articulated levels of performance. Application of these indicators and their accompanying rubrics to a Norwegian trawler demonstrated that the indicators and rubrics provide insight into social sustainability at the level of the vessel, which can be used to identify potential room for improvement. To determine whether social sustainability issues can be used for product differentiation, consumer interest in social sustainability issues of whitefish from the northeast Atlantic was studied. Results from a choice modelling survey demonstrated that consumers prefer the issue fish welfare over the issues product quality, worker safety and local employment. Given the lack of overview of the knowledge on fish welfare, the most important social sustainability issue for consumers, the literature on this topic was reviewed to determine how the capture process in capture fisheries affects fish welfare, using the indicators external injuries and mortality. This review showed that scale, skin and fin injuries occur more frequently in trawls, purse seines, gillnets, traps and seines than in hooks, whereas hooking injuries occur in hooks only. Pressure injuries can occur in all gear types when deployed at greater depth. Trawls, purse seines and seines result in higher mortality than gillnets, hooks and traps. Mortality appears to increase with decreasing fish length, and differs across fish species. A greater capture depth and a longer fishing duration were associated with more external injuries and higher mortality, whereas a large change in water temperature, a longer duration of air exposure and a high density in ...

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Estimating reef fish discard mortality using surface and bottom tagging: effects of hook injury and barotrauma

Cited by 33 publications

References 36 publications

Effectiveness of Venting and Descender Devices at Increasing Rates of Postrelease Survival of Black Sea Bass

Effectiveness of Venting and Descender Devices at Increasing Rates of Postrelease Survival of Black Sea Bass

Recreational Angler Attitudes and Perceptions Regarding the Use of Descending Devices in Southeast Reef Fish Fisheries

Understanding social sustainability of capture fisheries

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