نتایج جستجو برای: trawl

تعداد نتایج: 1709  

2017
Aino Hosia Tone Falkenhaug Emily J Baxter Francesc Pagès

The diversity and distribution of gelatinous zooplankton were investigated along the northern Mid-Atlantic Ridge (MAR) from June to August 2004.Here, we present results from macrozooplankton trawl sampling, as well as comparisons made between five different methodologies that were employed during the MAR-ECO survey. In total, 16 species of hydromedusae, 31 species of siphonophores and four spec...

2004
H. McElderry J. Schrader D. McCullough J. Illingworth S. Davis

Archipelago Marine Research Ltd. was selected by the Alaska Fisheries Science Center to test electronic monitoring (EM) equipment for possible use to examine seabird interactions with trawl third-wire cables on trawl vessels. This pilot study involved field testing of EM systems on shoreside delivery and head and gut bottom trawl vessels conducting operations in the Bering Sea, U.S. Exclusive E...

2007
Keiichi Uchida Tadashi Tokai

This paper presents the mesh selectivity of a net pot for white-spotted conger eel Conger myriaster. A cover-net fishing experiment was carried out in October 1995 and 1996, using five mesh openings; 11.6, 13.6, 15.5, 18.1, and 21.0 mm with a cover-net of 10.8 mm mesh opening. Each mesh-size net pot had a slightly different mesh selectivity curve in terms of R(=G/P), girth ratio G to mesh perim...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2013
Mary Gleason Erika M Feller Matt Merrifield Stephen Copps Rod Fujita Michael Bell Steve Rienecke Chuck Cook

Private-sector financial and legal transactions have long been used to protect terrestrial habitats and working landscapes, but less commonly to address critical threats in marine environments. Transferrable and marketable fishing privileges, including permits and quotas, make it possible to use private-sector transactions as conservation strategies to address some fishery management issues. Ab...

Journal: :علمی شیلات ایران 0
سارا نیکو s nikoo احمد سواری a savari پریتا کوچنین p cochnian سمین دهقان مدیسه s dehghan medise سمیه ساکی s saki

non-commercial fish species of shrimp trawls were studied monthly from october 2005 to september 2006 in mahshahr creeks (darvish, doragh, bihad, ghazaleh, ghanam, zangi and patil). the trawl nets had a cod-end mesh size of 24mm. total catch was 6431 individuals weighing 55.5kg, and included 14 species of non-commercial fish species belonging to 14 families. the caught shrimp species were from ...

2003
Michaela A. Guest Rod M. Connolly Neil R. Loneragan

Densities of nekton were estimated by comparing catch rates of two previously uncompared gear types, a beam trawl and a seine net, by day and night in a shallow seagrass (Zostera capricorni) habitat in Moreton Bay, Queensland, Australia. A total of 39,676 fish and crustaceans representing 42 species was caught. The catch rates of nekton were 1.4–68.1 times higher at night than in the day for 8 ...

2009
Mehmet Baki YOKES Murat BILECENOGLU Menachem GOREN Bella S. GALIL Arik DIAMANT Adnan Menderes

Vanderhorstia mertensi Klausewitz, 1974, is a recently acknowledged alien fish in the Mediterranean Sea, hitherto observed only from Fethiye Bay, Turkey. To explore its distribution, trawl bycatch from eastern Antalya and Iskenderun was examined and an underwater survey was performed off Kas (western Antalya). An established population was found off Güvercin Island, Kas, and six specimens were ...

2005

Objective The West Coast Groundfish Observer Program (WCGOP) collects at-sea data from limited trawl and fixed gear fleet as well as from open access nearshore, prawn, and shrimp fleets. This information is vital for determining the amount of discard and total catch of groundfish species in this region. This report summarizes discard data collected by the West Coast Groundfish Observer Program ...

2017
P. Daniël van Denderen Stefan G. Bolam Jan Geert Hiddink Simon Jennings Andrew Kenny Adriaan D. Rijnsdorp Tobias van Kooten

Bottom trawl fishing has widespread impacts on benthic habitats and communities. The benthic response to trawling seems to be smaller or absent in areas exposed to high natural disturbance, leading to the hypothesis that natural and trawl disturbance affect benthic communities in a similar way. However, systematic tests of this hypothesis at large spatial scales and with data from sites spannin...

2014
Matthew Heard Jason A. Van Rijn Richard D. Reina Charlie Huveneers

Research on physiological stress and post-capture mortality of threatened species caught as bycatch is critical for the management of fisheries. The present study used laboratory simulations to examine the physiological stress response of sparsely spotted stingarees (Urolophus paucimaculatus) subjected to one of four different trawl treatments, including two different trawl durations as well as...

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