Behavioral impairment after escape from trawl codends may not be limited to fragile fish species

Ryer, Clifford H.; Ottmar, Michele L.; Sturm, Erick A.

doi:10.1016/s0165-7836(03)00197-8

Cited by 52 publications

(65 citation statements)

References 23 publications

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“…It has been reported that some fish species have a greater capacity to survive many factors (injury, captivity stress, predation, etc.) (Ryer et al 2004) like brown comber in the present study. Ingólfsson et al (2007) also reported such differences of mortality among three fish species that although cod and saithe (Pollachius virens) were capable of surviving after their escape from the trawl, haddock was more vulnerable.…”

Section: Discussionsupporting

confidence: 72%

A Preliminary Study on the Survival of Brown Comber, <I>Serranus Hepatus</I> (Actinopterygii, Perciformes, Serranidae), Escaping from the Codend of a Bottom Trawl

Düzbastılar¹,

Özgül²,

Aydin³

et al. 2010

Acta Icth et Piscat

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Section: Discussionsupporting

confidence: 72%

A Preliminary Study on the Survival of Brown Comber, <I>Serranus Hepatus</I> (Actinopterygii, Perciformes, Serranidae), Escaping from the Codend of a Bottom Trawl

Düzbastılar¹,

Özgül²,

Aydin³

et al. 2010

Acta Icth et Piscat

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“…While previous studies have indicated a high percentage of injury resulting from the cumulative and often long-term effects of recreational and commercial fishing (an increase from 31 to 50% over a 7 mo fishing season; Davis 1981), the current study has shown that a substantial increase in the frequency of injury can occur over only 2 d. Since injuries to fishery target species can reduce survival (Ryer et al 2004), the frequency at which they occur and the subsequent increase in mortality rate should be incorporated into population and fishery stock assessment models. Alternatively, on coral patch heads we did not observe a large increase in the percentage of injured lobsters from pre-to post mini-season.…”

Section: Sublethal Lobster Injurycontrasting

confidence: 67%

“…Few studies, however, have addressed the potential for fishing practices to indirectly modify and disturb animal behavior. We do know that (1) fishes subjected to capture and release exhibit reduced growth and elevated mortality (Warner 1978, Loftus et al 1988, Diggles & Ernst 1997, (2) fish that escape through trawl nets have altered behaviors that may increase their risk of predation (Ryer et al 2004), and (3) dredge fishery discards can lead to behavioral modification of scavengers (Veale et al 2000). What is lacking and needed, is quantification of human disturbance events, the resulting behavioral modifications by target species and, if altered behaviors lead to increased mortality, the mechanisms underlying elevated mortality and population consequences of such delayed mortality.…”

Section: Introductionmentioning

confidence: 99%

Indirect effects of recreational fishing on behavior of the spiny lobster Panulirus argus

Parsons¹,

Eggleston²

2005

Mar. Ecol. Prog. Ser.

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Sublethal disturbance may lead to behavioral modifications that have detrimental consequences for the individual. Sublethal disturbance is an indirect effect of fishing that has seldom been examined. In summer 2003, we conducted surveys on the Caribbean spiny lobster Panulirus argus in the Florida Keys, USA, before and after a 2 d mini-season exclusively for recreational sportdivers to assess the frequency of injured lobsters. We also conducted (1) a tethering experiment to assess the influence of disturbance and injury on predation-induced mortality, and (2) Y-maze laboratory experiments to assess the effect of injury and disturbance on the shelter choice of conspecifics. Injury surveys revealed an immediate increase (to 27.16%) in the percentage of injured lobsters from pre-to post mini-season within patch reef habitats, but only a small increase in injured lobsters amongst patch head habitats. Tethering trials revealed that injured lobsters were more likely to succumb to predation than uninjured controls, while the shelter choice experiments demonstrated that the usual ability to attract conspecifics was altered by injury. Considering the ability of this fishery to unintentionally injure > 25% of the lobster population in patch reef habitats in just 2 d, the potential population consequences to spiny lobsters must be examined.

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“…Stressors experienced by fish during CAR fishing can include hooking trauma, physical overexertion, barotrauma, rapid thermal change, air exposure, and physical handling (Davis et al, 2001;Rummer and Bennett, 2005;Nieland et al, 2007;Jarvis and Lowe, 2008). These stressors from CAR fishing may also translate into long-term, sublethal, negative consequences, such as reduced growth and fecundity (Woodley and Peterson, 2003;Ryer et al, 2004;Davis, 2007). The effects of CAR fishing can be problematic particularly for marine species like red snapper that inhabit relatively deep water and possess a physoclis-tous gas bladder (i.e., an air bladder not connected to the alimentary canal).…”

mentioning

confidence: 99%

Release mortality in the red snapper (Lutjanus campechanus) fishery: a meta-analysis of 3 decades of research

Campbell¹,

Driggers²,

Sauls³

et al. 2014

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Abstract-The value of catch-and-release fishing as a conservation measure is highly dependent upon rates of discard frequency and release mortality. Therefore, it is important to understand how estimates of these variables are affected by factors such as capture depth and water temperature. The meta-analytical approach to modeling used here for red snapper (Lutjanus campechanus) in the Gulf of Mexico provides a robust method for dealing with studyspecific differences in experimental protocols and for estimating release (discard) mortality as a function of key factors. Results of this analysis showed significant increases in mortality by depth and for the commercial sector. The most consistent result was the positive correlation between depth and estimates of release mortality, a relationship that was present regardless of study method, fishing sector, hook type used, or season of study. The effect of venting (deflating the swim bladder by puncture) was dependent on whether the study produced estimates of immediate or delayed mortality. Immediate estimates indicated that mortality rates are lowered by venting whereas delayed estimates indicated that venting increased mortality rates. This result is largely reflective of the use of submergence ability, from surface-release studies, as a proxy for mortality. The model's interaction result indicates that recompression of fish may be a viable alternative to venting and that, if a recompression device is not available, venting at least improves the likelihood that a fish can submerge and return to protective habitat. The depth-based functional relationships developed in this model were used in the most recent red snapper stock assessment in 2012, and that use was a change from previous assessments where region-specific point estimates were used.

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Behavioral impairment after escape from trawl codends may not be limited to fragile fish species

Cited by 52 publications

References 23 publications

A Preliminary Study on the Survival of Brown Comber, <I>Serranus Hepatus</I> (Actinopterygii, Perciformes, Serranidae), Escaping from the Codend of a Bottom Trawl

A Preliminary Study on the Survival of Brown Comber, <I>Serranus Hepatus</I> (Actinopterygii, Perciformes, Serranidae), Escaping from the Codend of a Bottom Trawl

Indirect effects of recreational fishing on behavior of the spiny lobster Panulirus argus

Release mortality in the red snapper (Lutjanus campechanus) fishery: a meta-analysis of 3 decades of research

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