Results 91 to 100 of about 4,677 (222)
Ecological InformaticsPelagic pair trawling involves two vessels towing a single midwater net in coordinated motion to target schooling pelagic species. Monitoring and distinguishing pair-trawl operations remain challenging for fisheries management, particularly when analyses
Taner Yıldız +4 more
doaj +1 more source
Ocean distribution of the American shad (Alosa sapidissima) along the Pacific coast of North America [PDF]
, 2011 We examined the incidental catches of American shad (Alosa sapidissima) taken during research cruises and in commercial and recreational landings along the Pacific coast of North America during over 30 years of sampling.
Fisher, Joseph P., Pearcy, William G.
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Frontiers in Marine Science, 2019 Micronekton are a key component of the pelagic food web of the Chatham Rise east of New Zealand. The Chatham Rise is an important fishing area for hoki (Macruronus novaezelandiae), New Zealand’s largest finfish fishery, and a predator on mesopelagic fish.
Pablo Christian Escobar-Flores +2 more
doaj +1 more source
Pacific herring, Clupea harengus pallasi, studies in San Francisco and Tomales Bays, April 1989 to March 1990 [PDF]
, 1990 Herring schools were surveyed hydroacoustically in San Francisco Bay from early November 1989 through mid March 1990. Seven large schools (>1000 tons) and two smaller ones were detected. The total acoustic biomass estimate based on visual integration
Oda, Kenneth T., Wendell, Frederick
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FishesThe National Institute of Fisheries Science in Korea is developing marine mammal bycatch reduction devices (BRDs) for midwater trawl gear. In this study, we tested two BRD-type guide nets (inclined net panel) with 30° and 45° tilt angles to prevent ...
Jung-Mo Jung +6 more
doaj +1 more source
Pacific herring, Clupea harengus pallasi, studies in San Francisco and Tomales Bays, April 1987 to March 1988 [PDF]
, 1988 Herring schools were surveyed hydroacoustically and sampled in San Francisco Bay from late October 1987 to March 1988. Nine large schools (greater than 1000 tons) and four smaller ones were detected.
Moore, Thomas O., Reilly, Paul N.
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Cruise 3 of the N. B. Scofield for 1953. Cruise Report 53-S-3 [PDF]
, 1953 (PDF contains 3 pages.
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Static characteristics of a midwater trawl net using canvas mouth opening devices.
NIPPON SUISAN GAKKAISHI, 1988 Amidwater trawl net using canvas sheet outside the wings in place of the otter boards was designed, and the static characteristics of the model net were examined in a circulating water tank within flow speed ranging from 25 to 110cm/s. The width and height of the mouth opening and the total drag of the 1.3m model net were measured varying the canvas ...
Ko Matuda, Fuxiang Hu, Atsushi Koike
openaire +2 more sources
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
Historical background to the South African horse mackerel fishery and its management [PDF]
, 2016 The commercial fishery for the South African horse mackerel Trachurus capensis began in 1950. Horse mackerel are exploited by four fleets: purse-seine, offshore demersal, inshore demersal, and midwater trawl.
Butterworth, Doug S +2 more
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