Results 221 to 230 of about 3,155 (256)

Bottom Trawling

2019
Bottom Trawling. One of the most common ways to catch fish is by dragging nets along the seafloor. This causes changes in the plants and animals that live there. When the same areas are trawled frequently, the community on the seafloor can be drastically changed. Long-lived species such as corals and sponges are severely affected.
Ray Hilborn, Ulrike Hilborn
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Reply to: Quantifying the carbon benefits of ending bottom trawling

Nature, 2023
[Extract] In the accompanying Comment, Hiddink et al.1 challenge our estimate2 of the magnitude of seabed carbon remineralized by bottom trawling. However, we think that the conclusions by Hiddink1 are based on incorrect assumptions and that these conclusions lack quantitative support for several of their claims.
Trisha B. Atwood, Enric Sala, Juan Mayorga, Darcy Bradley, Reniel B. Cabral, Arnaud Auber, William Cheung, Francesco Ferretti, Alan M. Friedlander, Steven D. Gaines, Cristina Garilao, Whitney Goodell, Benjamin S. Halpern, Audra Hinson, Kristin Kaschner, Kathleen Kesner-Reyes, Fabien Leprieur, Jennifer McGowan, Lance E. Morgan, David Mouillot, Juliano Palacios-Abrantes, Hugh P. Possingham, Kristin D. Rechberger, Boris Worm, Jane Lubchenco   +24 more
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Cable behavior in bottom trawling

Ocean Engineering, 1985
Abstract A method of numerical analysis based on iterative solutions of quasi-linearized differential equations describing the behavior of long cable segments is developed. The method is implemented in a computer program for use on small computer facilities, such as desktop-sized computers.
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The geometrical gear shape of a bottom trawl

Ocean Engineering, 2014
Abstract 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
exaly   +2 more sources

Effects of bottom trawling on ecosystem functioning

Journal of Experimental Marine Biology and Ecology, 2008
By 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, Morten T. Schaanning, Stephen Widdicombe, Mike A. Kendall, Melanie C. Austen   +4 more
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Preliminary bottom trawling experiments with a newly designed separator fish trawl

Fisheries Research, 1991
Abstract 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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Exploratory bottom trawling in Lake Victoria

2021
When 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, 2015
Benthic 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, Paula, Sobral, Tânia, Pereira   +2 more
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Prevent bottom trawling in southern Brazil

Science, 2021
Luís Gustavo, Cardoso, Manuel, Haimovici, Patrízia Raggi, Abdallah, Eduardo Resende, Secchi, Paul Gerhard, Kinas   +4 more
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A Transactional and Collaborative Approach to Reducing Effects of Bottom Trawling

Conservation Biology, 2013
Abstract 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, Erika M, Feller, Matt, Merrifield, Stephen, Copps, Rod, Fujita, Michael, Bell, Steve, Rienecke, Chuck, Cook   +7 more
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