Results 31 to 40 of about 1,092 (209)

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

Arctic cod (Boreogadus saida, Gadidae) in the Chukchi Sea and adjacent waters

open access: yesИзвестия ТИНРО, 2021
Biology, spatial distribution, migrations, and stock dynamics are considered for arctic cod in the Russian sector of the Chukchi Sea and adjacent waters of the northern Bering Sea on the data of trawl surveys conducted by Pacific Res. Inst.
A. B. Savin
doaj   +1 more source

Variability in micronekton active carbon transport estimates on the Southwest Coast of Oahu using three different sampling gears

open access: yesFrontiers in Marine Science, 2022
Micronekton were sampled off the southwest coast of Oahu in October of 2004 as part of the North Pacific Marine Sciences Organization (PICES) Micronekton Sampling Gear Intercalibration experiment (MIE-1).
Lian E. Kwong   +5 more
doaj   +1 more source

A Comparative Assessment of Mid-Water Trawl and Deep Vision for Investigating Fishery Resources in the Coastal Waters off Jeju Island, Korea

open access: yesApplied Sciences, 2022
Acoustic-trawl surveys use trawl sampling to identify aquatic species. The Deep Vision stereo camera system collects images of fish passing through trawl extensions.
Yong-Deuk Lee   +5 more
doaj   +1 more source

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

open access: yes, 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   +3 more
core  

Development of a new midwater sampling trawl

open access: yesFisheries science, 2002
To collect he pelagic larval and juvenile fish, several kinds of midwater trawling gear have been developed.1-4) A common disadvantage of these trawls is that depth of the net changes greatly by the towing speed. In order to overcome the disadvantages of these sampling trawls, Hu et al.
HU, FUXIANG   +3 more
openaire   +2 more sources

Estimating the Catch Efficiency of a Framed Midwater Trawl under Different Sampling Conditions Using an Acoustic Method

open access: yesJournal of Marine Science and Engineering, 2023
The authors have developed a method to estimate the catch efficiency of sampling gear using acoustic information. Since different sampling conditions will cause different sampling results, it is necessary to know more details about catch efficiency to ...
Zhen Lu   +3 more
doaj   +1 more source

Midwater Trawling Studies in the North Pacific1 [PDF]

open access: yesLimnology and Oceanography, 1959
A modified version of the Isaacs‐Kidd midwater trawl was used for 149 exploratory hauls in the Northeastern Pacific at depths ranging from 20 to 250 meters. Catches are discussed in terms of such factors as diurnal migration, seasonal variation, patchiness, and geographic variation.There was wide difference between day and night hauls.
openaire   +1 more source

DEVELOPMENT AND TESTING OF ALGORITHM FOR CALCULATION OF OPERATING PARAMETERS OF TRAWLING SYSTEMS

open access: yesИзвестия ТИНРО, 2019
Numerical model of trawling system is developed on the base of equilibrium principle, using F.I. Baranov’s scheme of its power and geometric parameters interdependence.
E. A. Zakharov   +2 more
doaj   +1 more source

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