Authors: Hiddink, Jan Geert; Jennings, Simon; Sciberras, Marija; Szostek, Claire L.; Hughes, Kathryn M.; Ellis, Nick; Rijnsdorp, Adriaan D.; McConnaughey, Robert A.; Mazor, Tessa; Hilborn, Ray; Collie, Jeremy S.; Pitcher, C. Roland; Amoroso, Ricardo Oscar; Parma, Ana María; Suuronen, Petri; Kaiser, Michel J.
Publication Date: 2017.
Language: English.
Abstract:
Bottom trawling is the most widespread human activity affecting seabed habitats. Here, we collate all available data for experimental and comparative studies of trawling impacts on whole communities of seabed macroinvertebrates on sedimentary habitats and develop widely applicable methods to estimate depletion and recovery rates of biota after trawling. Depletion of biota and trawl penetration into the seabed are highly correlated. Otter trawls caused the least depletion, removing 6% of biota per pass and penetrating the seabed on average down to 2.4 cm, whereas hydraulic dredges caused the most depletion, removing 41% of biota and penetrating the seabed on average 16.1 cm. Median recovery times posttrawling (from 50 to 95% of unimpacted biomass) ranged between 1.9 and 6.4 y. By accounting for the effects of penetration depth, environmental variation, and uncertainty, the models explained much of the variability of depletion and recovery estimates from single studies. Coupled with large-scale, high-resolution maps of trawling frequency and habitat, our estimates of depletion and recovery rates enable the assessment of trawling impacts on unprecedented spatial scales.
Author affiliation: Hiddink, Jan Geert. Bangor University; Reino Unido
Author affiliation: Jennings, Simon. Centre for the Environment; Reino Unido. University of East Anglia; Reino Unido
Author affiliation: Sciberras, Marija. Bangor University; Reino Unido
Author affiliation: Szostek, Claire L.. Bangor University; Reino Unido
Author affiliation: Hughes, Kathryn M.. Bangor University; Reino Unido
Author affiliation: Ellis, Nick. Commonwealth Scientific and Industrial Research Organization Oceans & Atmosphere; Australia
Author affiliation: Rijnsdorp, Adriaan D.. Institute for Marine Resources and Ecosystem Studies; Países Bajos
Author affiliation: McConnaughey, Robert A.. National Oceanic and Atmospheric Administration; Estados Unidos
Author affiliation: Mazor, Tessa. Commonwealth Scientific and Industrial Research Organization Oceans & Atmosphere; Australia
Author affiliation: Hilborn, Ray. University of Washington; Estados Unidos
Author affiliation: Collie, Jeremy S.. University of Rhode Island; Estados Unidos
Author affiliation: Pitcher, C. Roland. Commonwealth Scientific and Industrial Research Organization Oceans & Atmosphere; Australia
Author affiliation: Amoroso, Ricardo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Author affiliation: Parma, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Author affiliation: Suuronen, Petri. Food and Agriculture Organisation of the United Nations; Italia
Author affiliation: Kaiser, Michel J.. Bangor University; Reino Unido
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Hughes, Kathryn M.; Kaiser, Michel J.; Jennings, Simon; McConnaughey, Robert A.; Pitcher, Roland; Hilborn, Ray; Amoroso, Ricardo Oscar; Collie, Jeremy; Hiddink, Jan Geert; Parma, Ana Maria; Rijnsdorp, Adriaan
Publication Date: 2014.
Language: English.
Abstract:
Background: Mobile bottom fishing, such as trawling and dredging, is the most widespread direct human impact on marine benthic systems. Knowledge of the impacts of different gear types on different habitats, the species most sensitive to impacts and the potential for habitats to recover are often needed to inform implementation of an ecosystem approach to fisheries and strategies for biodiversity conservation. This knowledge helps to identify management options that maximise fisheries yield whilst minimising negative impacts on benthic systems. Methods/design: The methods are designed to identify and collate evidence from experimental studies (e.g. before/after, control/impact) and comparative studi es (spanning a gradient of fishing intensity) to identify changes in state (numbers, biomass, diversity etc.) of be nthic biota (flora and fauna), resulting from a variety of mobile bottom fishing scenarios. Th e primary research question that the outputs will be used to address is: “to what extent does a given intensity of bottom fishing affect the abundance and/or diversity of benthic biota?” Due to the variety of gear and habitat types studied, the primary question will be closely linked with secondary questions. These include: “how does the effect of bottom fishing on various benthic biota metrics (species, faunal type, trait, taxon etc.) vary with (1) gear type and (2) habitat, and (3) gear type-habitat interactions?” and (4) “how might properties of the community and environment affect the resilience (and recovery potential) of a community to bottom fishing?”
Author affiliation: Hughes, Kathryn M.. Bangor University; Reino Unido
Author affiliation: Kaiser, Michel J.. Bangor University; Reino Unido
Author affiliation: Jennings, Simon. Fisheries and Aquaculture Science. Centre for Environment; Reino Unido
Author affiliation: McConnaughey, Robert A.. National Oceanic and Atmospheric Administration; Estados Unidos
Author affiliation: Pitcher, Roland. CSIRO Oceans and Atmosphere Flagship; Australia
Author affiliation: Hilborn, Ray. University of Washington; Estados Unidos
Author affiliation: Amoroso, Ricardo Oscar. University of Washington; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Author affiliation: Collie, Jeremy. University of Rhode Island; Estados Unidos
Author affiliation: Hiddink, Jan Geert. Bangor University; Reino Unido
Author affiliation: Parma, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Author affiliation: Rijnsdorp, Adriaan. Institute for Marine Resources and Ecosystem Studies; Reino Unido
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas