Results 11 to 20 of about 32,183 (242)

Hydrodynamic interactions in midwater trawl nets: combined effects of flow velocity and door spreading through numerical and experimental approaches

Brodogradnja
Owing to escalating fuel costs and dwindling fish stocks, optimising midwater trawl efficiency requires a thorough investigation of net design variables.
Zhao Cheng, Xiaobin Li, Yonghe Xie, Panpan Jia, Li Guoqiang, Wang Wei   +5 more
doaj   +2 more sources

A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear

Fishes
The National Institute of Fisheries Science in Korea is developing marine mammal bycatch reduction devices (BRDs) for high-risk fishing gear, such as trawls.
Jung-Mo Jung, Min-Seuk Park, Kyu-Suk Choi   +2 more
doaj   +2 more sources

An Improved Backstepping-Based Controller for Three-Dimensional Trajectory Tracking of a Midwater Trawl System

Journal of Control Science and Engineering, 2016
An improved backstepping control method for three-dimensional trajectory tracking of a midwater trawl system is investigated. A new mathematical model of the trawl system while considering the horizontal expansion effect of two otter boards is presented ...
Zhao Yan, Yun sheng Mao, Cheng gang Liu
doaj   +2 more sources

A study of approach to assessing a functional relationship between solidity ratios for the rope/net part of midwater trawl

Известия ТИНРО, 2020
In this paper we have analyzed an approach to assessing the relationship between some characteristics of the net panels forming the rope/net cone of a fishing trawl.
L. M. Simkin
doaj   +2 more sources

Bycatch of Loggerhead Turtle (Caretta caretta) in the Italian Adriatic Midwater Pair Trawl Fishery

Frontiers in Marine Science, 2019
Despite the fact that Mediterranean loggerhead turtles are listed as “Least Concern” by the International Union for the Conservation of Nature (IUCN), they are among the most threatened marine megafauna worldwide, because of fishery-related incidental ...
Jacopo Pulcinella, Sara Bonanomi, Alessandro Colombelli, Caterina Maria Fortuna, Fabrizio Moro, Alessandro Lucchetti, Antonello Sala   +6 more
doaj   +2 more sources

Catch Losses and Reduction of Bycatch for Jellyfish Using Marine Mammal Bycatch Reduction Devices in Midwater Trawl Gear

Fishes
The National Institute of Fisheries Science in Korea is developing marine mammal bycatch reduction devices (BRDs) for midwater trawl gear. In this study, we tested two BRD-type guide nets (inclined net panel) with 30° and 45° tilt angles to prevent ...
Jung-Mo Jung, Hyun-Young Kim, Bong-Jin Cha, Sung-Jae Kim, Tae-Suk Kim, Gyeong-Cheol Hyun, Kyu-Suk Choi   +6 more
doaj   +2 more sources

PROBLEMS OF CONTROL OF MIDWATER TRAWL COMPLEXES USING EQUATIONS OF ELECTRIC AND MECHANICAL DRIVES OF TRAWL WINCHES

Vestnik of Astrakhan State Technical University. Series: Fishing industry, 2020
The paper touches upon the problems of transition to advanced digital, intelligent man-ufacturing technologies, robotic systems, new materials and design methods, the creation of systems for processing large amounts of data, machine learning and artificial intelligence.
Vyacheslav Valerievich Makarov, Alexey Olegovich Razhev, Aleksandr Nedostup   +2 more
openaire   +3 more sources

Modeling of the Midwater Trawl Dynamical Behavior Based on R Language [PDF]

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering, 2015
The midwater trawl is used widely in many oceanic fisheries. In this study, the midwater trawl dynamical behavior was simulated and modeled with the mathematical mechanic equations based on R language platform. A lump-mass and spring method was used to build the physical model.
Yingqi Zhou, Liming Song, Xinjun Chen, Min Zhang, Xinfeng Zhang, Xiaorong Zou, Yuwei Li   +6 more
openaire   +2 more sources

Biodiversity and distribution of gelatinous macrozooplankton in the North Sea and adjacent waters - dataset from winter 2022ZENODO [PDF]

Data in Brief
The diversity and distribution of gelatinous macrozooplankton is described by presenting qualitative and quantitative data of the jellyfish and comb jelly community encountered in the North Sea and Skagerrak/Kattegat during January/February 2022.
Camilla Juul Dahl Jensen, Louise G. Køhler, Bastian Huwer, Malin Werner, Leslie Cieters, Cornelia Jaspers   +5 more
doaj   +2 more sources

Population Dynamics and Body Size Structure of the Antarctic Krill Euphausia superba in the Bransfield Strait and South Shetland Islands [PDF]

Biology
Antarctic krill (Euphausia superba) is a keystone species in the marine ecosystem of the Antarctic Ocean, bringing about significant ecological and economic value.
Guoqing Zhao, Shuai Li, Jialiang Yang, Gangchen Zhang, Bo Xu, Hewei Liu, Xin Rao, Peng Lian, Hongliang Huang, Lingzhi Li   +9 more
doaj   +2 more sources