Results 31 to 40 of about 4,677 (222)

Development of a new midwater sampling trawl

Fisheries 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.
FUXIANG HU, YOSHIOKI OOZEKI, Tadashi TOKAI, Ko MATUDA   +3 more
openaire   +2 more sources

Midwater Trawling Studies in the North Pacific1 [PDF]

Limnology 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

Известия 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, O. N. Kruchinin, D. L. Shabelsky   +2 more
doaj   +1 more source

Spatiotemporal patterns of variability in the abundance and distribution of winter-spawned pelagic juvenile rockfish in the California Current.

PLoS ONE, 2021
Rockfish are an important component of West Coast fisheries and California Current food webs, and recruitment (cohort strength) for rockfish populations has long been characterized as highly variable for most studied populations.
John C Field, Rebecca R Miller, Jarrod A Santora, Nick Tolimieri, Melissa A Haltuch, Richard D Brodeur, Toby D Auth, E J Dick, Melissa H Monk, Keith M Sakuma, Brian K Wells   +10 more
doaj   +1 more source

Daily ration of Antarctic silverfish (Pleuragramma antarcticum Boulenger, 1902) in the Eastern Weddell Sea

Scientia Marina, 2004
The daily ration of Pleuragramma antarcticum in the Eastern Weddell Sea was investigated from midwater and bottom trawl samples collected in the Antarctic in the summer of 1998.
Ignacio Olaso, Antoni Lombarte, Francisco Velasco   +2 more
doaj   +1 more source

San Francisco Estuary mysid abundance in the fall, and the potential for competitive advantage of Hyperacanthomysis longirostris over Neomysis mercedis

California Fish and Wildlife Journal, 2020
Historically, the native mysid Neomysis mercedis was a key source of food for fish in the San Francisco Estuary (SFE). Following the introductions of the over-bite clam and many invasive zooplankton species in the mid-1980s, populations of native ...
Michelle Avila, Rosemary Hartman
doaj   +1 more source

Hydrodynamic interactions in midwater trawl nets: combined effects of flow velocity and door spreading through numerical and experimental approaches

Brodogradnja
Owing to escalating fuel costs and dwindling fish stocks, optimising midwater trawl efficiency requires a thorough investigation of net design variables.
Zhao Cheng, Xiaobin Li, Yonghe Xie, Panpan Jia, Li Guoqiang, Wang Wei   +5 more
doaj   +1 more source

Bycatch of Loggerhead Turtle (Caretta caretta) in the Italian Adriatic Midwater Pair Trawl Fishery

Frontiers in Marine Science, 2019
Despite the fact that Mediterranean loggerhead turtles are listed as “Least Concern” by the International Union for the Conservation of Nature (IUCN), they are among the most threatened marine megafauna worldwide, because of fishery-related incidental ...
Jacopo Pulcinella, Sara Bonanomi, Alessandro Colombelli, Caterina Maria Fortuna, Fabrizio Moro, Alessandro Lucchetti, Antonello Sala   +6 more
doaj   +1 more source

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

Известия 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

A practical approach to the design, construction and operation of midwater trawl used in Kainji Lake, Nigeria [PDF]

, 1979
(19 page ...
Yaro, I.
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