Results 91 to 100 of about 1,092 (209)

Larvae and Pelagic Juveniles of Blackgill Rockfish, Sebastes melanostomus, Taken in Midwater Trawls off Southern California and Baja California

, 1978
Examination of 217 midwater trawl samples from the coastal basins off southern California and Baja California revealed a recurring group of rockfish species.
H. Geoffrey Moser, Elbert H. Ahlstrom
core   +1 more source

EVALUATION OF MIDWATER TRAWL SELECTIVITY AND ITS INFLUENCE ON ACOUSTIC-BASED FISH POPULATION SURVEYS

, 2013
Thesis (Ph.D.)--University of Washington, 2013Trawls are used extensively during fisheries abundance surveys to derive estimates of fish density and, in the case of acoustic-based surveys, to identify acoustically sampled fish populations.
Williams, Kresimir
core  

Sample Design-based Methodology for Estimating Delta Smelt Abundance

San Francisco Estuary and Watershed Science, 2008
A sample design-based procedure for estimating pre-adult and adult delta smelt abundance is described. Using data from midwater trawl surveys taken during the months of September, October, November, and December for the years 1990 through 2006 and ...
Ken B. Newman
doaj  

Spatial and temporal changes in assemblage structure of zooplankton and pelagic fish in the eastern Bering Sea across varying climate conditions

Известия ТИНРО, 2015
Zooplankton and pelagic fish samples collected on the eastern Bering Sea shelf in late summer 2003-2010 were used to evaluate spatial and temporal changes in the plankton and nekton community structure.
Lisa B. Eisner, Elizabeth C. Siddon, Wesley W. Strasburger   +2 more
doaj   +1 more source

IDEALIZING THE DESIGN MODEL OF THE ROPE PART OF THE MIDWATER TRAWL

Vestnik of Astrakhan State Technical University. Series: Fishing industry, 2018
The article presents a perspective approach to the analysis of a stress state of net gear. A set of assumptions and simplifications of determining the forces acting on the end part of the trawl have been proposed. In terms of strength analysis of the trawl gear elements, the rope section deserves a thorough study, since the rope section elements are ...
openaire   +2 more sources

Semi-Pelagic Trawling in The U.S. West Coast Groundfish Bottom Trawl Fishery: Effects on Catch Efficiency and Seafloor Interactions [PDF]

Reducing the impacts of bottom trawling on seafloor habitats is a management priority in the U.S. West Coast groundfish bottom trawl fishery as well as other trawl fisheries internationally.
Herrmann, Bent, Wakefield, W. Waldo, Abele, Meagan, Lomeli, Mark Joseph Max, Lomeli, Mark J.M.   +4 more
core   +1 more source

Demography of Antarctic krill (Euphausia superba) from the KY1804 austral summer survey in the eastern Indian sector of the Southern Ocean (80 to 150˚E), including specific investigations of the upper surface waters

Frontiers in Marine Science
Antarctic krill (Euphausia superba) is a harvested species that has an important role in the Southern Ocean food web. Knowledge on the demography of Antarctic krill is necessary for a better understanding of the distribution of life stages and their ...
Fokje L. Schaafsma, Ryan Driscoll, Kohei Matsuno, Kohei Matsuno, Rikuto Sugioka, Sara Driscoll, Marin van Regteren, Hiroko Sasaki, Ryuichi Matsukura, Jan Andries van Franeker, Hiroto Murase   +10 more
doaj   +1 more source

Characteristics of Dynamic Control of Midwater Trawl System in Field Experiments.

NIPPON SUISAN GAKKAISHI, 1994
In order to investigate the characteristics of dynamic control of a midwater trawl, a field experiment was conducted by FRV “SINYO-Maru” of Tokyo University of Fisheries. The parameters of the midwater trawl being towed were measured with a SCANMAR system and a self-recording underwater load-depth meter.
Fuxiang Hu, Ko Matuda, Kaname Sato
openaire   +2 more sources

Length-Weight Relationship of 10 Fish Species Caught by Bottom Trawl and Midwater Trawl from Middle Black Sea, Turkey.

, 2007
Length-weight relationships are descri bed for ten important demersal and pe lagic fish species caught with bottom trawl: Merlangius merlangus , Mullus barbatus , Gobius niger, Alosa pontica, Spicara smaris, Scorpaena porcus , and midwater ...
Samsun, Necati, Samsun, Osman, Kalaycı, Ferhat, Bilgin, Sabri   +3 more
core  

STUDY OF THE POSSIBILITY OF USING THE CONCEPT OF GEOMETRIC PROBABILITY TO ESTIMATE THE PROBABILITY OF CAPTURE OF PELAGIC FISH AGGREGATIONS BY MIDWATER ROPE TRAWL

, 2017
The article discusses the possibility of using one of the methods of probability theory in the classical problem about the meeting in relation to the issue of full coverage of Jack mackerel aggregations in the Southeast Pacific by the rope part of the ...
Alexander Vasilievich Dvernik, Anna Nikolaevna Yanchuk   +1 more
core   +1 more source