Results 11 to 20 of about 2,895 (199)

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   +1 more
doaj   +1 more source

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

Engineering calculation of a midwater fishing trawl

open access: yesVestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, 2023
This paper presents a method for calculating the power and geometric properties of a midwater fishing trawl, which is a complicated engineering structure made up of tied flexible (threads, ropes, flap) and rigid (rigging, trawl boards) elements. A computational model, the functional relations for internal forces and geometric characteristics of the ...
Aleksey O. Razhev, Aleksandr A. Nedostup
openaire   +1 more source

Stocks and fishery of cod (Gadus macrocephalus, Gadidae) in the northwestern Bering Sea in 1965–2022

open access: yesИзвестия ТИНРО, 2023
For pacific cod in the northwestern Bering Sea, biomass of the summer-fall feeding aggregations in the specified area of their highest density (polygon) is considered as a stock unit.
A. B. Savin
doaj   +1 more source

Field experiment on static characteristics of midwater trawl system. [PDF]

open access: yesNIPPON SUISAN GAKKAISHI, 1991
A field experiment was conducted by FRV “Shinyo-maru” belonging to Tokyo University of Fisheries in order to make detailed measurements on operational characteristics of a mid-water trawl system. Time series data describing the net geometry and the towing loads occurring during hauls were measured by SCANMAR system (acoustic spreadmeter and netsonde ...
Ko Matuda   +4 more
openaire   +3 more sources

Biodiversity of commercially important finfish species caught by mid-water and bottom trawls from two different coasts of Arabian Sea: Threats and conservation strategies

open access: yesBrazilian Journal of Biology, 2021
This study was conducted to estimate the diversity and the occurrence of commercially important finfish species collected by twenty fish sampling site of Sindh and Baluchistan coasts of the Arabian Sea in Pakistan from January to December 2019 ...
H. Ul-Hassan   +12 more
doaj   +1 more source

Exploration of the “larval pool”: development and ground-truthing of a larval transport model off leeward Hawai‘i [PDF]

open access: yesPeerJ, 2016
Most adult reef fish show site fidelity thus dispersal is limited to the mobile larval stage of the fish, and effective management of such species requires an understanding of the patterns of larval dispersal.
Johanna L.K. Wren, Donald R. Kobayashi
doaj   +2 more sources

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