Results 61 to 70 of about 1,092 (209)

A study of approach to assessing a functional relationship between solidity ratios for the rope/net part of midwater trawl

open access: yesИзвестия ТИНРО, 2020
In this paper we have analyzed an approach to assessing the relationship between some characteristics of the net panels forming the rope/net cone of a fishing trawl.
L. M. Simkin
doaj   +1 more source

Environmental Drivers of Jumbo Squid During Fishery Collapse in the Gulf of California (2019–2024)

open access: yesFisheries Oceanography, Volume 35, Issue 4, Page 477-491, July 2026.
ABSTRACT The jumbo squid (Dosidicus gigas) is a cephalopod endemic to the eastern Pacific with significant ecological and economic importance. Its exploitation in the Gulf of California (GC) peaked in the 1990s, with catches exceeding 100,000 tons, but collapsed in 2009 and virtually disappeared by 2015, largely due to environmental changes and ...
Mario Vásquez‐Ortiz   +5 more
wiley   +1 more source

Using the Diet Composition of Adult Chinook Salmon to Understand the Regional Structure of Salish Sea Forage Communities

open access: yesFisheries Oceanography, Volume 35, Issue 4, Page 565-579, July 2026.
ABSTRACT Small pelagic fish and other forage species are patchily distributed over space and time, resulting in variable foraging conditions experienced by their predators. The high‐resolution data necessary to understand the spatiotemporal structure of forage communities are challenging to collect with expensive fishery‐independent surveys, meaning ...
Wesley L. Greentree   +4 more
wiley   +1 more source

Shape and Hydrodynamic Characteristics of Canvas Kite for Midwater Trawl.

open access: yesNIPPON SUISAN GAKKAISHI, 1999
キャンバスカイトの流体特性を明らかにするために, 形状の異なる5種類のキャンバスカイトの模型を用いて, 0.2から0.5までの4段階の異なるキャンバーと迎角30°から130°の範囲で水槽実験を行った。実験で得られた揚力と抗力から求めた最大揚力係数と最大揚抗比は, I型の反り比0.2と迎角度50°で, それぞれ1.37と2.00であった。また, 簡単な構造の拡網装置としてキャンバスカイトを用いるには, I型が最適形状であるといえた。
Ishizaki, Munechika, Fuwa, Shigeru
openaire   +2 more sources

Stage‐Specific Indicators of Northern Yellowtail Rockfish (Sebastes flavidus) Recruitment in the California Current Ecosystem

open access: yesFisheries Oceanography, Volume 35, Issue 4, Page 630-649, July 2026.
ABSTRACT Oceanographic and ecological conditions can be used to inform forecasts and decision‐making for marine resources, but the dominant drivers of recruitment variability remain poorly understood for many fish stocks. We developed a conceptual life‐history model of the oceanographic and ecological variables that influence the recruitment of ...
Megan L. Feddern   +3 more
wiley   +1 more source

Historical Records of Tumours in New Zealand Marine Fishes

open access: yesNew Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 2, June 2026.
Tumours were first described in New Zealand marine fishes in 1982 but those early records have been difficult to access and subsequently few tumours have been collected and little has been published. This review updates records of identified tumours from teleosts in the New Zealand marine environment and may encourage more work to identify background ...
John Brian Jones
wiley   +1 more source

Numerical Analysis of a Mid-Water Trawl System With a 6-DOF Otter Board Model and Sea-Trial Verification

open access: yesIEEE Access, 2018
In this paper, we proposed a mathematical model of a mid-water trawl system. The model consisted of towing warps, otter boards, a trawl net, and other rigging components. The warp and the net were modeled with the lumped mass method.
Yinglong Chen   +3 more
doaj   +1 more source

PROBLEMS OF CONTROL OF MIDWATER TRAWL COMPLEXES USING EQUATIONS OF ELECTRIC AND MECHANICAL DRIVES OF TRAWL WINCHES

open access: yesVestnik of Astrakhan State Technical University. Series: Fishing industry, 2020
The paper touches upon the problems of transition to advanced digital, intelligent man-ufacturing technologies, robotic systems, new materials and design methods, the creation of systems for processing large amounts of data, machine learning and artificial intelligence.
Vyacheslav Valerievich Makarov   +2 more
openaire   +2 more sources

Trends in marine species distribution models: a review of methodological advances and future challenges

open access: yesEcography, Volume 2026, Issue 5, May 2026.
Correlative species distribution models (SDMs) are quantitative tools in biogeography and macroecology. Building upon the ecological niche concept, they correlate environmental covariates to species presence to model habitat suitability and predict species distributions.
Moritz Klaassen   +3 more
wiley   +1 more source

Synthetic pelagic biomass size spectra of the tropical and subtropical Atlantic

open access: yesEcosphere, Volume 17, Issue 5, May 2026.
Abstract Synthetic normalized biomass size spectra (NBSS) comprising non‐synoptically sampled phytoplankton, meso‐ and macrozooplankton, and micronekton including mesopelagic fishes were explored to analyze pelagic community structure in seven regions of the tropical and the subtropical Atlantic representative of different water bodies (NE Brazil shelf,
Heino O. Fock   +25 more
wiley   +1 more source

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