نتایج جستجو برای: purse seining

تعداد نتایج: 1386  

2015
Juan Bécares Manuel García-Tarrasón Dani Villero Santiago Bateman Lluís Jover Víctor García-Matarranz Carolina Sanpera José Manuel Arcos

Although the breeding ecology of Audouin's gull has been widely studied, its spatial distribution patterns have received little attention. We assessed the foraging movements of 36 GPS-tracked adult Audouin's gulls breeding at the Ebro Delta (NW Mediterranean), coinciding with the incubation period (May 2011). This also coincided with a trawling moratorium northwards from the colony. We modelled...

2015
Marek Šmejkal Daniel Ricard Marie Prchalová Milan Říha Milan Muška Petr Blabolil Martin Čech Mojmír Vašek Tomáš Jůza Agustín Monteoliva Herreras Lourdes Encina Jiří Peterka Jan Kubečka

The European Standard EN 14757 recommends gillnet mesh sizes that range from 5 to 55mm (knot-to-knot) for the standard monitoring of fish assemblages and suggests adding gillnets with larger mesh sizes if necessary. Our research showed that the recommended range of mesh sizes did not provide a representative picture of fish sizes for larger species that commonly occur in continental Europe. We ...

2004
Annick Cros Tim McClanahan

Two coral species, Porites palmata and Porites lutea, were transplanted into three distinct management areas adjacent to the Mombasa Marine National Park, Kenya: A no-fishing MPA; a gear-restricted reserve with no beach seining; and a reserve with beach seining. Corallivory by fish or breakage by fishing gear was measured over a 57-day period. Porites palmata, the branching species, was more su...

2008
Gala Moreno Laurent Dagorn Gorka Sancho David Itano

Purse-seining for tropical tuna is one of the most technologically advanced fisheries in the world. The purpose of this study was to apply local ecological knowledge (LEK) to assist in the planning of future in situ studies of fish behaviour around drifting fish aggregating devices (DFADs) by prioritizing research topics, thereby reducing the number of potential hypotheses to explore. Interview...

2010
Bruno Leroy David G. Itano Thomas Usu Simon J. Nicol Kim N. Holland John Hampton

Archival and acoustic tagging were carried out in the exclusive economic zone (EEZ) of Papua New Guinea (PNG) in the western Pacific Ocean during 2006–07 to investigate the vertical behavior of tropical tuna found in association with large arrays of anchored FADs. Industrialized purse-seine fishing on anchored FADs has existed in the PNG EEZ for more than a decade. Archival tags were implanted ...

2007
MARK A. STEELE STEPHEN C. SCHROETER

Beach seines are widely used to estimate the density and species richness of fishes in estuaries. We evaluated the causes and extent of bias in estimates from seines using a series of field experiments in small estuaries in southern California, USA. Seining in spatially paired areas that were either enclosed by block nets or not, revealed that seines used without block nets underestimated densi...

2004
Martha Rowan Amit Gross Claude E. Boyd Jacob Blaustein

The effectiveness of alum (aluminum sulfate) in reducing the concentrations of potential pollutants in pond effluents was investigated in catfish production ponds. Application of alum at 50 mg/l to water remaining in ponds immediately after seining for harvest did not generally result in significantly greater removal of nutrients and solids than did settling alone, although removal rates of som...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Vincent Nier Maxime Deforet Guillaume Duclos Hannah G Yevick Olivier Cochet-Escartin Philippe Marcq Pascal Silberzan

Tissue fusion eliminates physical voids in a tissue to form a continuous structure and is central to many processes in development and repair. Fusion events in vivo, particularly in embryonic development, often involve the purse-string contraction of a pluricellular actomyosin cable at the free edge. However, in vitro, adhesion of the cells to their substrate favors a closure mechanism mediated...

Journal: :Frontiers in Marine Science 2022

Understanding the drivers of greenhouse gas emissions in food production systems is becoming urgent. For wild capture fisheries, fuel use during fishing phase generally dominates and highly variable between fisheries. Fuel also essential for economy but fuel-intensive fisheries can still be profitable due to subsidies, particular, if target species high value. Developing an innovative bottom-up...

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