Modeling submergence success of discarded yelloweye rockfish (Sebastes ruberrimus) and quillback rockfish (Sebastes maliger): Towards improved estimation of total fishery removals

Hochhalter, Samuel J.

doi:10.1016/j.fishres.2012.03.009

Cited by 8 publications

(8 citation statements)

References 21 publications

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“…Hochhalter (2012) showed that the impairment index and barotrauma indicators, both associated with maximum gas retention, were identified as important predictor variables for both yellow eye (Sebastes ruberrimus) and quillback rockfish (Sebastes maliger) submergence success. The ability to submerge is thus intuitively coupled to buoyancy status and the vitality of the fish, as a strong and vital fish may be able to dive while an exhausted fish may not, given the same positive buoyancy status.…”

Section: Discussionmentioning

confidence: 99%

“…Cod have been shown to have a mechanism for dealing with swimbladder rupture, gas release and healing (Humborstad and Mangor-Jensen 2013;Midling et al, 2012) that counteracts the adverse effects of positive buoyancy and is an important reason for the success of CBA of cod in demersal seine fisheries. Individuals showing signs of positive buoyancy and an inability to submerge (Hochhalter, 2012) cannot be used for live storage purposes and are easily sorted out, as can fish with other visible physical injuries.…”

Section: Introductionmentioning

confidence: 99%

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Survival and recovery of longline- and pot-caught cod (Gadus morhua) for use in capture-based aquaculture (CBA)

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Survival and recovery of longline- and pot-caught cod (Gadus morhua) for use in capture-based aquaculture (CBA)

et al. 2016

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“…). Although this approach has been used to assess the discard and escape mortalities of trawled, seined and angled organisms (Davis ; Hochhalter ; Raby et al . ), its utility rarely has been tested for gillnets and traps (Frick et al .…”

Section: Reviewmentioning

confidence: 99%

“…In contrast, and although perhaps not as accurate, indirect assessments generally are easier to achieve because they infer the fate of organisms, often by measuring either physical damage or vitality indices (Davis 2007;Benoît et al 2012Benoît et al , 2013Raby et al 2012) or physiological parameters indicative of stress (Patterson et al 2007;Snoddy and Southwood Williard 2010;Gale et al 2011b). Although this approach has been used to assess the discard and escape mortalities of trawled, seined and angled organisms (Davis 2007;Hochhalter 2012;Raby et al 2012), its utility rarely has been tested for gillnets and traps (Frick et al 2010Gale et al 2011b).…”

Section: Experimental Approaches To Quantify and Mitigate Unaccountedmentioning

confidence: 99%

Mitigating unaccounted fishing mortality from gillnets and traps

2013

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Gillnets and traps often are considered to have fewer holistic environmental impacts than active fishing gears. However, in addition to the targeted catches, gillnets and traps still cause unwanted mortalities due to (i) discarding, (ii) ghost fishing of derelict gear, (iii) depredation, (iv) escaping or dropping out of gear, (v) habitat damage, and potentially (vi) avoiding gear and predation and (vii) infection of injuries sustained from most of the above. Population‐level concerns associated with such ‘unaccounted fishing mortalities’ from gillnets and traps have been sufficient to warrant numerous attempts at mitigation. In this article, we reviewed relevant research efforts, locating 130 studies in the primary literature that concomitantly quantified mortalities and their resolution through technical modifications, with the division of effort indicating ongoing concerns. Most studies (85) have focused on discard mortality, followed by ghost‐fishing (24), depredation (10) and escape (8) mortalities. The remaining components have been poorly studied (3). All problematic mortality components are affected by key biological (e.g. species), technical (e.g. fishing mechanisms) and/or environmental (e.g. temperature) factors. We propose that these key factors should be considered as part of a strategy to reduce impacts of these gears by first assessing modifications within and then beyond conventional configurations, followed by changes to operational and handling practices. Justification for this three‐tiered approach is based not only on the potential for cumulative reduction benefits, but also on the likely ease of adoption, legislation and compliance.

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“…Without such curves, it is difficult to ultimately assign final outcomes regarding survival; however, there is a clear relationship between reflex impairment and delayed mortality. This technique has also been used with various reef fish to assess the effects of barotrauma (Campbell et al 2010a, 2010b; Hochhalter 2012). To our knowledge, RAMP has not been used to refine best practices for CAR bass tournaments, but it could be a valuable approach in this area.…”

mentioning

confidence: 99%

Comparison of Angler Interventions for Smallmouth Bass Experiencing Barotrauma in Catch‐and‐Release Angling Tournaments

Elliott

Row

Tufts

2021

N American J Fish Manag

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Black bass Micropterus spp. in North America are commonly targeted by recreational anglers who are participating in catch‐and‐release angling tournaments. In deeper water bodies, Smallmouth Bass M. dolomieu are often caught from depths greater than 6 m and held in a boat’s live well until they are weighed in. Smallmouth Bass that are caught from such depths typically display symptoms of barotrauma, where the swim bladder becomes overinflated and the fish cannot maintain proper orientation. We examined the effects of three common practices that are used by tournament anglers who hold fish that exhibit symptoms of barotrauma: no treatment, weighted fin clips (rubber‐coated weighted alligator clips), and fizzing (venting the swim bladder with a hypodermic needle). After receiving a treatment, the Smallmouth Bass were held in experimental live wells for a period of 3 h and their condition was monitored using reflex action mortality predictors. Condition declined for the Smallmouth Bass that received no treatment, whereas both fin clips and fizzing demonstrated improved fish condition. Fizzing was also found to be a more rapid and effective treatment than fin clips. As the weight and capture depth of fish in the control group increased, there was a significant decrease in final condition, as indicated by reflex impairment. For tournaments that hold fish in live wells prior to release, these results demonstrate that interventions shortly after capture can effectively reduce reflex impairment in Smallmouth Bass that experience barotrauma and that fizzing is more effective than fin clips.

show abstract

Modeling submergence success of discarded yelloweye rockfish (Sebastes ruberrimus) and quillback rockfish (Sebastes maliger): Towards improved estimation of total fishery removals

Cited by 8 publications

References 21 publications

Survival and recovery of longline- and pot-caught cod (Gadus morhua) for use in capture-based aquaculture (CBA)

Survival and recovery of longline- and pot-caught cod (Gadus morhua) for use in capture-based aquaculture (CBA)

Mitigating unaccounted fishing mortality from gillnets and traps

Comparison of Angler Interventions for Smallmouth Bass Experiencing Barotrauma in Catch‐and‐Release Angling Tournaments

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