Results 1 to 10 of about 267 (147)

Turbulent flow interacting with flexible trawl net structure including simulation catch in flume tank [PDF]

open access: yesScientific Reports, 2023
The interaction between fluid and the midwater trawl with stocked catches is extremely complex, but essential to improve the understanding of the drag force acting on the trawl, the behavior of the fishing structure during a trawling process, and to ...
Bruno Thierry Nyatchouba Nsangue   +4 more
doaj   +2 more sources

A comparison of hydrodynamic forces in knotted and knotless netting, using both helix and conventional ropes for midwater trawls

open access: yesAquaculture and Fisheries, 2021
This study evaluated the hydrodynamic forces produced by whole panels of hand-made (geometrically different) rope meshes typically found in midwater trawls.
Gebremeskel Eshetu Kebede, Paul D Winger
exaly   +3 more sources

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

open access: yesFrontiers 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.
Bent Herrmann
exaly   +3 more sources

Methоd of rigging parameters calculation for midwater trawls

open access: yesИзвестия ТИНРО, 2018
The rigging parameters calculation for midwater trawls are discussed with description of numerical model for calculating the parameters of trawl boards, hydrodynamic kites, and dispersed and concentrated weights which provide the designed values of ...
V. I. Gabruk   +3 more
doaj   +3 more sources

VERDA: A Multisampler Tool for Mesopelagic Nets

open access: yesJournal of Marine Science and Engineering, 2023
Different types and systems to discriminate plankton samples at different strata in the water column have been developed in recent decades. For sampling at sufficient depth, opening and closing zooplankton multinets are ideal because there is no ...
Arturo Castellón, María Pilar Olivar
doaj   +1 more source

A Gear Shape of a Midwater Trawl and Its Change [PDF]

open access: yesBulletin of the Korean society of Fisheries Technology, 2002
How to estimate the shape of trawl net and ropes of a midwater trawl on full scale was described by implementing a three-dimensional semi-analytic treatment of a towing cable system with the field experiments obtained with the Scanmar system.
Matuda, Ko   +4 more
openaire   +3 more sources

Size at sexual maturity estimation for 36 species captured by bottom and mid-water trawls from the marine habitat of Balochistan and Sindh in the Arabian Sea, Pakistan, using maximum length (Lmax) and logistic (L50) models [PDF]

open access: yesBrazilian Journal of Biology, 2022
The aim of this study was to estimate the size at first sexual maturity (Lm) for 36 species belonging to 24 families from the marine habitat of Balochistan and Sindh in Arabian Sea, Pakistan through maximum length based an empirical and logistic model ...
H. U. Hassan   +12 more
doaj   +1 more source

Spatial distribution of pacific herring Clupea pallasii on the northeastern shelf of Sakhalin Island in the modern period

open access: yesИзвестия ТИНРО, 2023
Spatial distribution of pacific herring Clupea pallasii in the Okhotsk Sea waters at the northeastern coast of Sakhalin Island is described on the data of surveys conducted in June-October of 1989 and 1997-2020 using bottom and midwater trawls and Danish
E. R. Ivshina, I. N. Mukhametov
doaj   +1 more source

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

open access: yesFrontiers 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   +3 more
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

open access: yesИзвестия 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   +2 more
doaj   +1 more source

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