Results 1 to 10 of about 1,093,651 (250)

Improving penaeid-trawl efficiencies via ground gear with tickler chains

Aquaculture and Fisheries, 2021
Penaeid trawls often have poor ecological efficiencies measured as unwanted bycatches (with high discard mortality) and
Matt K Broadhurst
exaly   +6 more sources

Quantitative Analysis of the Swimming Movements of Flatfish Reacting to the Ground Gear of Bottom Trawls [PDF]

Journal of Fisheries Science and Technology, 2006
Two typical responses have been documented for flatfish when they encounter the ground gear of bottom trawls: herding response and falling back response. These two responses were analyzed from video recordings of fish and were characterized by time sequences for four parameters: swimming speed, angular velocity, acceleration, and distance between the ...
Yong-Hae Kim
exaly   +2 more sources

Increase in catch efficiency using a semicircular ground gear in demersal trawls

Reviews in Fish Biology and Fisheries
Abstract In demersal trawls, ground gears are typically fixed to the fishing line to protect against the seabed and ensure seabed contact. Rockhoppers (RH) are among the most applied types of ground gears, especially in fisheries with rough seabed. However, their use has earlier been associated with substantial loss of catch under the fishing
Manu Sistiaga, Jesse Brinkhof, Bent Herrmann   +2 more
exaly   +2 more sources

Impact of ground gear design on catch efficiency in demersal trawl fishery [PDF]

Regional Studies in Marine Science, 2023
The choice of ground gear design in demersal trawls can significantly affect both catch composition and efficiency. The preference for a specific design depends on the fishing ground. In the North-Eastern Mediterranean, two types of ground gears, Single Line and Double Line are commonly used.
Y.E. Fakıoğlu, G. Gökçe, H. Özbilgin, K. Cerbule, B. Herrmann   +4 more
openaire   +3 more sources

Study on Reducing Towing Drag by Varying the Shape and Arrangement of Floats and Gears

Applied Sciences, 2022
Many studies have been conducted with the aim of reducing fuel consumption by the fishing industry. We examined whether drag can be reduced by changing the arrangement of gears without requiring the development of new parts for the conventional float and
Jung-Mo Jung, Yoshiki Matsushita, Seonghun Kim   +2 more
doaj   +1 more source

Preliminary calculation of the landing gear of a military training aircraft [PDF]

INCAS Bulletin, 2020
The paper presents a preliminary calculation method, which is easy to apply for pre-dimensioning the landing gear. Preliminary calculation of the landing gear includes estimating the loads on landing and determining the position of the nose landing gear ...
Ilie NICOLIN, Bogdan Adrian NICOLIN
doaj   +1 more source

Effect of Assembly Errors on Ground Tooth Surface Deviations for Large-Scale CNC Gear Profile Grinding Machines

Machines, 2022
Assembling plays a significant role in the performance of large-scale CNC gear profile grinding machines. An approach in the deviation evaluation of ground tooth surfaces taking into account assembly errors is proposed in this paper.
Wenzheng Ding, Wenquan He, Hu Zhang, Yao Li   +3 more
doaj   +1 more source

Landing Impact Load Analysis and Validation of a Civil Aircraft Nose Landing Gear

Aerospace, 2023
Landing impact load design is essential, but the process has rarely been fully described, and some designers have even neglected the differences between wheel-axle and ground-contact loads, as well as loads in the longitudinal direction, especially in ...
Wenbin Liu, Youshan Wang, Yuchen Ji
doaj   +1 more source

Drone Surveys Are More Efficient and Cost Effective Than Ground- and Boat-Based Surveys for the Inspection of Fishing Fleet at Harbors

Coasts, 2022
Generating accurate estimates of the number of vessels in fishing ports using traditional methods (i.e., ground- and boat-based) can be challenging as observations are distorted by an horizontal perspective.
José Amorim Reis-Filho, Tommaso Giarrizzo   +1 more
doaj   +1 more source

Effect of ground gear modification on bycatch of rays in mediterranean bottom trawl fishery

Ocean & Coastal Management, 2022
Bycatch of rays and skates in towed fishing gears represents one of the major threats to these relatively slow-growing marine species. The objective of this study was to modify ground gear in a bottom trawl fishery to increase the escape of these species during towing without associated loss of target catch.
Y.E. Fakıoğlu, H. Özbilgin, G. Gökçe, B. Herrmann   +3 more
openaire   +3 more sources