Trap design for catching fish unharmed and the implications for estimates of sea lice (Lepeophtheirus salmonis) on anadromous brown trout (Salmo trutta)

Barlaup, Bjørn Torgeir; Gabrielsen, Sven-Erik; Løyland, Jon; Schläppy, Marie‐Lise; Wiers, Tore; Vollset, Knut Wiik; Pulg, Ulrich

doi:10.1016/j.fishres.2012.01.024

Cited by 18 publications

(19 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These traps are specifically designed to capture sea trout, and might be generally described as an anchored netting structure which consists in two wings and a lead net that form the entrance to an open cube. This cube leads the fish into a tunnel with consecutive funnels and residence chambers, where the fish are trapped (Barlaup et al 2013). These particular fish traps consisted of a lead net (50 m long 9 5 m high) and two wings (10 m long 9 5 m Fig.…”

Section: Methodsmentioning

confidence: 99%

“…1 Map of Romsdalsfjord (Norway) showing the sampling locations where traps (circles) were deployed during the study period high), leading to an open cube (5 m long 9 5 m high 9 5 m wide) and into consecutive chambers (approx. 2.5 m long 9 1.2 m diameter) where the fish are trapped (for further details see Barlaup et al 2013). Traps were put out from a small boat and attached to the shoreline, covering a depth range from 0 to 5 m depth.…”

Section: Methodsmentioning

confidence: 99%

“…The grid, similar to that one described by Lehtonen and Suuronen (2004), prevents the entrance of seals and lets in a wide size range of fishes. Trapped fish are usually alive and unharmed, allowing selective fish harvesting and live releasing without modification on fish migration behaviour, if handled properly (Siira et al 2006;He and Inoue 2010;Barlaup et al 2013).…”

Section: Methodsmentioning

confidence: 99%

“…Skilbrei and Jørgensen 2010;Chittenden et al 2011;Liu et al 2011;Solem et al 2013), but also to monitor parasitic infestations of salmon lice (Lepeophtheirus salmonis) (e.g. Barlaup et al 2013;Skaala et al 2014;Arechavala-Lopez et al 2016). However, many other fish species are regularly caught by traps, but they are scarcely reported in aforementioned studies.…”

Section: Introductionmentioning

confidence: 99%

“…Traps hardly cause damages or mortalities among trapped fish so they are more recommended than other fishing methods (i.e. netting, angling) for fish research and conservation purposes (Barlaup et al 2013). Information about the presence of fish species captured by this kind of traps should help to better understand the dynamics of coastal fish populations along Norwegian coast, which are important nursery areas for several species (Olsen et al 2010).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Variations in coastal fish species composition captured by traps in Romsdalsfjord, Western Norway

et al. 2016

View full text Add to dashboard Cite

Fish traps are widely used in Norwegian fjords, especially those designed for monitoring salmonid populations in the marine environment, although many other marine fish species are also captured. The composition and spatio-temporal variations of fish species captured by fish traps were monitored in five different coastal locations throughout the Romsdalsfjord region, Western Norway, from May to August during the three consecutive years (2011)(2012)(2013). Twenty-three fish species were captured by traps in coastal waters, both resident and migratory fishes. The most common fish and with greater catchability were saithe (Pollachis virens) and sea trout (Salmo trutta), followed by cod (Gadus morhua), pollack (P. pollachius), herring (Clupea harengus) and mackerels (Trachurus trachurus and Scomber scombrus). However, the captured assemblage presented great spatial and seasonal variations, in terms of mean daily catch, probably associated with hydrographical conditions and migrational patterns. Information obtained in this study will help us to better understand the compositions and dynamic of coastal fish populations inhabiting Norwegian coastal waters. In addition, traps are highly recommended as a management tool for fish research (e.g. fish-tagging experiments, mark and recapture) and conservation purposes (coastal use and fisheries studies).

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Variations in coastal fish species composition captured by traps in Romsdalsfjord, Western Norway

et al. 2016

View full text Add to dashboard Cite

show abstract

Towards direct evidence of the effects of salmon lice (Lepeophtheirus salmonis Krøyer) on sea trout (Salmo trutta L.) in their natural habitat: proof of concept for a new combination of methods

et al. 2018

View full text Add to dashboard Cite

Studies addressing the impact of salmon lice (Lepeophtheirus salmonis Krøyer) on sea trout in their natural habitat are scarce and mostly limited to prophylaxis-based experiments. The main drawbacks with this approach are that lice infestations on control fish are not known and the anti-parasitic treatment is of unknown efficacy and may have unwanted side-effects. We tested an innovative approach where prophylaxis is replaced with artificial infestation of the fish. Twenty-nine sea trout post-smolts were caught in a farming-free area in southern Norway and half the fish were artificially infested with lice. Survival and behavior of individual fish was investigated using acoustic telemetry. Furthermore, salinity values were extracted from an hydrodynamical model simulation and connected to individual 3D positions. Results from this pilot study show consistent trends in behavioral differences between artificially infested and control fish. All fish that died or prematurely returned to freshwater were artificially infested fish, although results were not statistically significant. Besides, power analysis confirmed the limitations of this small pilot study for delivering statistically significant inferences. We found also indications of artificially infested fish remaining in shallower waters and within shorter distance to low salinity habitats, but only differences in modelled salinity values were statistically significant. Methodological progress and limitations with this original approach are discussed, and we recommend further studies using this combination of methods and the lessons learnt from this pilot study to provide better quantitative evidence on the effect of salmon lice on sea trout in the wild.

show abstract

Large-scale use of fish traps for monitoring sea trout (Salmo trutta) smolts and sea lice (Lepeophtheirus salmonis) infestations: efficiency and reliability

Arechavala-López

Uglem

Berg

et al. 2015

Marine Biology Research

View full text Add to dashboard Cite

Trap design for catching fish unharmed and the implications for estimates of sea lice (Lepeophtheirus salmonis) on anadromous brown trout (Salmo trutta)

Cited by 18 publications

References 9 publications

Variations in coastal fish species composition captured by traps in Romsdalsfjord, Western Norway

Variations in coastal fish species composition captured by traps in Romsdalsfjord, Western Norway

Towards direct evidence of the effects of salmon lice (Lepeophtheirus salmonis Krøyer) on sea trout (Salmo trutta L.) in their natural habitat: proof of concept for a new combination of methods

Large-scale use of fish traps for monitoring sea trout (Salmo trutta) smolts and sea lice (Lepeophtheirus salmonis) infestations: efficiency and reliability

Contact Info

Product

Resources

About