Energy consumption of three different trawl configurations used in the Barents Sea demersal trawl fishery

Testing of a helix twine off-bottom trawl on Georges Bank

“…Presumably, the OBT filtering a greater volume of water for the same fuel cost, contributed to its catch efficiency. These findings are largely consistent with other research comparing fuel consumptions between bottom, semi-pelagic, and pelagic trawls (Grimaldo et al, 2015) in which bottom trawls demonstrated the highest fuel consumption, using a constant speed (whereas our speeds were different between gear types), despite the differences in rigging and smaller fishing area of the bottom trawl (similar to our research). Due to the large size of the OBT net and despite the presence of helix twine meshes, sufficient depth is still required to attain optimal door spread and net shape.…”

Hydrodynamic Performance of Semi-Pelagic Self-Adjusting Otter Boards in Demersal Trawl Fisheries

“…We must, however, treat the fuel consumption results with caution, as they also account for the drag of the vessel and warps and will be influenced by tide, wind and sea state, and propeller pitch and rpms and hence must be assessed over a broader range of operational conditions. Nevertheless, they compare well with the results of other authors who found reductions in fuel consumption of between 12 and 22% when using doors of reduced contact or semi-pelagic doors (McHugh et al, 2015;Eayrs et al, 2012;Grimaldo et al, 2015).…”

“…In order to reduce seabed contact, semi-pelagic otter boards that have been towed above the seabed and, in principle, do not contact it have also been developed (DeLouche and Legge, 2004;Reite and Sørensen, 2006;He et al, 2006;Eayrs, 2014;Grimaldo et al, 2015;Sistiaga et al, 2015). However, using semi-pelagic otter boards without proper control on the position of them in the water column can result in seabed contact particularly on a varying seabed or during poor weather conditions (Eayrs and CraigShort, 2020).…”

A Review of Key Technologies and Trends in the Development of Integrated Heating and Power Systems in Agriculture

“…In foreign countries, the fishing industry relies heavily on fossil fuels. A series of experimental research was carried out on energy-saving research on fishing vessels [ 106 , 107 ], fishing gear [ 108 , 109 , 110 ], fishing ports [ 111 , 112 , 113 , 114 , 115 ] and other sources of fishery energy consumption. For the recirculating aquaculture systems (RAS) in China [ 116 ], which are a cooperative combination of fish culture (aquaculture) and nutrient solution for soilless plant production (hydroponics), vegetables and fish in RAS grow rapidly at higher temperatures [ 117 ] and thus, the system must be heated.…”