نتایج جستجو برای: bottom trawling
تعداد نتایج: 60372 فیلتر نتایج به سال:
Private-sector financial and legal transactions have long been used to protect terrestrial habitats and working landscapes, but less commonly to address critical threats in marine environments. Transferrable and marketable fishing privileges, including permits and quotas, make it possible to use private-sector transactions as conservation strategies to address some fishery management issues. Ab...
In order to influence global policy effectively, conservation scientists need to be able to provide robust predictions of the impact of alternative policies on biodiversity and measure progress towards goals using reliable indicators. We present a framework for using biodiversity indicators predictively to inform policy choices at a global level. The approach is illustrated with two case studie...
Onboard discards of a fraction the catch can be considered one main issues related to bottom trawling fisheries. The magnitude and composition still need better understood. We assessed industrial pair fishery’s from southern Brazil by monitoring 159 fishing hauls during four trips. From 318.9 mt captured, 77.7 t were discarded (24%). per haul highly variable, on average 488.9 kg (95% CI: 433.6-...
Juvenile and trash fish excluder devices (JTEDs) are used to mitigate the ecological impact of trawling. Trawling has a large footprint in Taiwan. Thus, this study designed three JTEDs, which differed only grid interval, for single boat bottom otter trawls that commonly The JTEDs were tested waters off Kaohsiung on Kaohsiung-based trawler, results as follows. (1) At least 300 species caught, 18...
Abstract Increases of water turbidity and suspended sediment transport in submarine canyons have been associated with high-energy events such as storms, river floods dense shelf cascading (DSWC), occasionally bottom trawling along canyon flanks rims. To assess the variations on column Palamós Canyon linked to both natural trawling-induced processes, an autonomous hydrographic profiler, well a n...
BACKGROUND Environmental impacts of human activities on the deep seafloor are of increasing concern. While activities within waters shallower than 200 m have been the focus of previous assessments of anthropogenic impacts, no study has quantified the extent of individual activities or determined the relative severity of each type of impact in the deep sea. METHODOLOGY The OSPAR maritime area ...
Selection of indicators for assessing and managing the impacts of bottom trawling on seabed habitats
Disturbances due to trawling and dredging is a serious threat to assemblages of benthic marine animals. We tested hypotheses about effects of trawling on benthic assemblages in a manipulative field experiment, using gear and intensities relevant to future management of trawling in a Swedish fjord. Three trawled and three control sites were sampled at several times before and after trawling was ...
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