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Effects of bottom trawling on ecosystem functioning
Journal of Experimental Marine Biology and Ecology, 2008By combining field observations with data from controlled mesocosm experiments this study demonstrated that bottom trawling has the potential to cause long-term impacts on sediment nutrient fluxes. Field observations confirmed that trawling reduced the density of important bioturbators in the study area, but revealed only weak effects of trawling on ...
Frode Olsgard +4 more
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Preliminary bottom trawling experiments with a newly designed separator fish trawl
Fisheries Research, 1991Abstract A separator trawl was designed by introducing a short horizontal panel of net webbing between the upper and lower belly of a 29.7 m/34.2 m (head rope/foot rope) high opening bottom trawl (HOBT), dividing the net into two equal horizontal compartments terminating in two independent codends.
M.K. Ashok, D.S. Sheshappa
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, 2020
In the Falkland Islands, the South American fur seal and South American sea lion spatially overlap and interact with bottom-trawling fisheries. Until 2015, interactions of these species with the Patagonian bottom trawl squid fishery were uncommon. During
V. Iriarte, A. Arkhipkin, D. Blake
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In the Falkland Islands, the South American fur seal and South American sea lion spatially overlap and interact with bottom-trawling fisheries. Until 2015, interactions of these species with the Patagonian bottom trawl squid fishery were uncommon. During
V. Iriarte, A. Arkhipkin, D. Blake
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Exploratory bottom trawling in Lake Victoria
2021When the Lake Victoria Fisheries Research Project began, the background information necessary for the successful application of quantitative stock assessment was lacking. For this. reason and also due to the size of Lake Victoria, the complexity and variety of its many habitats, and its multispecies fishery, it was decided that initial stock assessment
Bergstrand, E., Cordone, A.J.
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Marine litter in bottom trawls off the Portuguese coast
Marine Pollution Bulletin, 2015Benthic marine litter along the Portuguese coast, was recorded in 14 trips on stern trawlers covering a distance of 2117 km and an area of 56.2 km(2), average depth range 90-349 m. 2034 items of marine litter were registered, 76% were plastics and 38.6% were originated from fishing related activities.
Diogo, Neves +2 more
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A Transactional and Collaborative Approach to Reducing Effects of Bottom Trawling
Conservation Biology, 2013Abstract 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
Mary, Gleason +7 more
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Performance of new hyper-lift trawl door for both mid-water and bottom trawling
, 2020A hyper-lift trawl door (HLTD) which is not heavily dependent on the bottom for its hydrodynamic performance was developed for both bottom and midwater trawling.
Xinxing You +4 more
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The geometrical gear shape of a bottom trawl
Ocean Engineering, 2014Abstract An estimation of the gear shape during a bottom trawl can be achieved through geometrical modeling of the trawl system. This can be implemented by processing the field data obtained using the Scanmar system. The gear shape from the square through the bag net was assumed to be the upper and lower parts of different elliptic cones of which the
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Mapping change in bottom trawling activity in the Mediterranean Sea through AIS data
Marine Policy, 2018A growing concern about the depletion of marine resources due to fishing overexploitation and degradation of ecosystems has been demonstrated over the last decade.
C. Ferrà +6 more
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Dynamic Analysis of Trawl Doors Applied in Bottom Trawls to Catch Shrimp
2016This work deals with the dynamic analysis of a new design of trawl doors. The model is constrained to steady towing conditions with velocity constant, flat seabed and gear symmetry. The Ordinary Differential Equations (ODE) of the system includes the effects of the warp and the ropes in terms of external forces. In the mathematical model the influences
S. Sarmiento-Nafaté +3 more
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