Results 11 to 20 of about 430 (170)

Identification of three cephalopods from the Iranian waters of the Gulf of Oman (Continental shelf area) [PDF]

open access: yesIranian Journal of Animal Biosystematics, 2021
This study aimed to find new species of cephalopods in the Iranian waters of the Gulf of Oman. Two species of Oegopsida (Abralia steindachneri Weindl, 1912 and Joubiniteuthis portieri (Joubin, 1916)) and also one species of Sepiida (Sepia omani Adam ...
Reza Badali   +3 more
doaj   +1 more source

A method to determine patterns for changing parameters of the rope-net shell of midwater trawl along its length

open access: yesИзвестия ТИНРО, 2023
A technique for designing the rope-net shell of midwater trawl is described on example of the trawl Sirius Shelf project AS 11.012.000 designed by Aquaservice Ltd. Diagrams of the rope-net shell parameters distribution along trawl are used. The technique
L. M. Simkin
doaj   +1 more source

Effect of Cutting Ratio and Catch on Drag Characteristics and Fluttering Motions of Midwater Trawl Codend

open access: yesJournal of Marine Science and Engineering, 2021
The codend of a trawl net is the rearmost and crucial part of the net for selective fish catch and juvenile escape. To ensure efficient and sustainable midwater trawl fisheries, it is essential to better understand the drag characteristics and fluttering
Wei Liu   +5 more
doaj   +1 more source

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.
Zhongqiu Wang   +13 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

Modern specialized fishery of sea fish in the western Bering Sea

open access: yesИзвестия 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

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

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

open access: yesFrontiers 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   +11 more
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

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

open access: yesCalifornia 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

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