Results 11 to 20 of about 26,803 (164)

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

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

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 large, opening-closing midwater trawl for sampling oceanic nekton, and comparison of catches with an Isaacs-Kidd midwater trawl [PDF]

A new midwater trawl for sampling deepsea nekton from discrete depths is described. Its mouth area is about 50 m2. The trawl body is lined with small mesh netting and terminates in a 5-net opening-closing codend device.
Pearcy, William G.
core   +6 more sources

Catch Pattern for Antarctic krill (Euphausia superba) of Different Commercial Trawls in Similar Times and Overlapping Fishing Grounds

Frontiers in Marine Science, 2021
Antarctic krill (Euphausia superba) is harvested using different design midwater trawls. Knowing the selective properties between trawls is crucial information for the management of the krill resources.
Zhongqiu Wang, Hao Tang, Hao Tang, Hao Tang, Hao Tang, Hao Tang, Bent Herrmann, Bent Herrmann, Bent Herrmann, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu   +13 more
doaj   +1 more source

Modern specialized fishery of sea fish in the western Bering Sea

Известия ТИНРО, 2021
The shelf and continental slope of the western Bering Sea, being among the most productive areas of the Far-Eastern Seas of Russia, became exploited by commercial fishery half a century ago, after introduction of 200-mile exclusive economic zones in 1977
A. O. Zolotov
doaj   +1 more source

DETERMINING OF OPERATIONAL PARAMETERS FOR TRAWL SYSTEM TAKING INTO ACCOUNT EXPERIMENTAL DATA ON SHAPE OF THE ROPE-NET SHELL OF MIDWATER TRAWLS

Известия ТИНРО, 2020
Calculating of horizontal opening for a trawl mouth using the mathematical model of midwater trawl system developed by V.I. Gabryuk gives the errors 25.4 and 32.9 %, on average, for the trawls RT 57/360 m and RT 80/396 m, respectively.
O. N. Kruchinin, E. A. Zakharov, D. L. Shabelsky   +2 more
doaj   +1 more source

Rescue of a green sea turtle caught in a midwater trawl along Palk Bay, Southeast coast of India [PDF]

, 2021
An exploratory fish trawl survey was conducted on 4th March 2021 along the Mallipattinam coast of Palk Bay, Tamil Nadu, on the southeast coast of India.
Thirumalaiselvan, S, Vinothkumar, R, Rajkumar, M, Nazar, A K A   +3 more
core   +1 more source

Flume Tank Evaluation on the Effect of Liners on the Physical Performance of the Antarctic Krill Trawl

Frontiers in Marine Science, 2022
The Antarctic krill (Euphausia superba) is one of the most abundant resources in the ocean, which provides food for several important species in the Antarctic Ocean, and is targeted commercially by humans for many decades.
Hao Tang, Hao Tang, Hao Tang, Hao Tang, Bruno Thierry Nyatchouba Nsangue, Achille Njomoue Pandong, Pingguo He, Xu Liuxiong, Xu Liuxiong, Xu Liuxiong, Xu Liuxiong, Fuxiang Hu   +11 more
doaj   +1 more source

Three Distinct Views of Deep Pelagic Community Composition Based on Complementary Sampling Approaches

Frontiers in Marine Science, 2022
Our perception of deep-sea communities has evolved as various sampling approaches have captured different components of deep-sea habitats. We sampled midwater zooplankton assemblages in Monterey Bay, California to quantify community composition ...
Elizabeth D. Hetherington, C. Anela Choy, Erik V. Thuesen, Steven H. D. Haddock   +3 more
doaj   +1 more source

Incorporating expanded sampling into an alternative abundance index for the Fall Midwater Trawl survey

California Fish and Wildlife Journal, 2022
The Fall Midwater Trawl (FMWT) Survey has been conducted near continuously since 1967 to assess the abundance and distribution of pelagic fish species throughout the San Francisco Bay/Sacramento-San Joaquin estuary (Bay Delta).
James R. White, Randall D. Baxter
doaj   +1 more source