Now showing items 90-109 of 372

    • The ecological and economic value of cold-water coral ecosystems 

      Foley, Naomi; Armstrong, Claire W. (Journal article; Tidsskriftartikkel, 2010)
      Despite the growing scientific literature on cold-water corals (CWC) there appears to be no studies that address the economic values or economic management of the resource. This paper presents an overview of the goods and services of CWC and their associated biodiversity. Use and non-use values associated with CWC are presented, and the methods relevant for assessing their valuation are discussed. ...
    • Ecological linkages in a Caribbean estuary bay. 

      Andrade, Hector; Santos, Jorge; Ixquiac, MJ (Journal article; Tidsskriftartikkel, 2015-08-06)
      Central America and the western Caribbean form a center of freshwater and marine biodiversity that is now receiving attention in ecological and evolutionary studies. We conducted one integrated ecological study of Amatique Bay, Guatemala, a major estuary lagoon connected to the Mesoamerican Reef System, and provide novel information for management and conservation of similar systems across the ...
    • Economic Impacts of Global Warming : The Case of the Barents Sea Fisheries 

      Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2007)
      Regional analyses of possible physical and biological effects of global warming in the Barents Sea area have been carried out recently. Based on such studies possible economic impacts of global warming on the Barents Sea fisheries have been quantified, assuming different types of management regimes. The EconSimp2000 model, consisting of the ecosystem model AggMult and the fleet model EconMult have ...
    • Effect of a quality-improving codend on size selectivity and catch patterns of cod in bottom trawl fishery 

      Brinkhof, Jesse; Herrmann, Bent; Larsen, Roger B.; Veiga-Malta, Tiago (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-26)
      A new codend concept developed and tested exhibited significantly improved quality of caught cod (<i>Gadus morhua</i>) compared to that of the conventional codend used in the Barents Sea bottom trawl fishery. However, the design of the new quality-improving codend raised concerns about its size selectivity and the possibility that higher retention probability could negatively impact the catch pattern ...
    • The effect of algae diets (Skeletonema costatum and Rhodomonas baltica) on the biochemical composition and sensory characteristics of Pacific cupped oysters (Crassostrea gigas) during land-based refinement 

      van Houcke, Jasper; Medina, Isabel; Mæhre, Hanne K; Cornet, Josiane; Cardinal, Mireille; Linssen, Jozef; Luten, Joop (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-20)
      <p>Oyster refinement, a common practice in France, is aimed at increasing the weight of oyster tissue and influencing the taste properties of the refined oysters. Refinement usually takes place in land-based systems where the oysters are fed with relatively high concentrations of microalgae. In this study the impact of feeding <i>Skeletonema costatum</i> and <i>Rhodomonas baltica</i> on the biochemical ...
    • Effect of Bait Type and Bait Size on Catch Efficiency in the European Hake Merluccius merluccius Longline Fishery 

      Sistiaga, Manu Berrondo; Herrmann, Bent; Rindahl, Lasse; Tatone, Ivan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-21)
      We investigated the effect of bait type and bait size on the catch ef fi ciency of a demersal longline fi shery targeting European Hake Merluccius merluccius in the North Sea. Automation of the labor-intensive processes onboard fi shing vessels requires fi nding alternatives to the traditional bait used in the fi shery (i.e., whole European Pilchard Sardina pilchardus ). Of the six ...
    • Effect of Codend Circumference on the Size Selection of Square-Mesh Codends in Trawl Fisheries 

      Sala, Antonello; Herrmann, Bent; De Carlo, Francesco; Lucchetti, Alexandro; Brcic, Jure (Peer reviewed, 2016-07-29)
      It is well established that increasing mesh number in the circumference of a diamond-mesh trawl codend can reduce size selection for round fish, whereas selection for flat fish species is unaffected. This effect has also been documented in Mediterranean trawl fisheries. In contrast, no information is available with regard to the effect of increasing mesh number in the circumference of square-mesh ...
    • Effect of Hook and Bait Size on Catch Efficiency in the Persian Gulf Recreational Fisheries 

      Herrmann, Bent; Eighani, Morteza; Paighambari, Seyed Yousef; Feeking, Jordan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-15)
      The effect of hook and bait sizes on the catch efficiency and size composition of Spangled Emperor <i>Lethrinus nebulosus</i>, Orange‐spotted Grouper <i>Epinephelus coioides</i>, and Narrowbarred Mackerel <i>Scomberomorus commerson</i> was investigated in the recreational and semi‐subsistence handline fishery in the Persian Gulf. Based on expectations that increasing hook and bait sizes would decrease ...
    • Effect of lifting the sweeps on bottom trawling catch efficiency on the Northeast arctic cod trawl fishery 

      Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Herrmann, Bent; Larsen, Roger B.; Tatone, Ivan (Research report; Forskningsrapport, 2014)
      Fuel consumption and environmental concerns have led bottom trawlers fishing for cod (Gadus morhua) in the Barents Sea to use semi-pelagic doors. However, this change may affect fish herding and consequently the catch efficiency of the gear. In this study we compared the catch efficiency of two different setups where the sweep length with bottom contact was different. This setup also enabled us to ...
    • The effect of Nordmøre grid length and angle on codend entry of bycatch fish species and shrimp catches 

      Larsen, Roger B.; Sistiaga, Manu Berrondo; Herrmann, Bent; Brinkhof, Jesse; Tatone, Ivan; Santos, Juan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-18)
      The Nordmøre grid is regarded as an efficient bycatch reducing device and is used in various shrimp trawl fisheries globally. However, in some shrimp fisheries bycatch remains a problem that seriously impacts commercial trawl activities. This study tested and compared the performance of two versions of the Nordmøre grid in the Northeast Arctic Deepwater Shrimp (Pandalus borealis) fishery; a standard ...
    • The effect of semi-pelagic trawling on american plaice (hippoglossoides platessoides) by-catch reduction in the northeast arctic shrimp fishery 

      Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Herrmann, Bent; Larsen, Roger B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      The present study reports results of a small-scale preliminary experiment to evaluate whether lifting trawl doors and sweeps from the seabed can lead to a reduction of by-catch in the Northeast Arctic shrimp trawl fishery. We carried out a catch comparison and catch ratio analysis between two gear configurations: one with trawl doors and sweeps on the seabed (traditional rigging) and the other with ...
    • Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery 

      Herrmann, Bent; Sistiaga, Manu Berrondo; Larsen, Roger B.; Brinkhof, Jesse (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-31)
      Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different sizes depends the size selection in the Nordmøre grid and the size selection in the subsequent codend, ...
    • Effects of antioxidants on copper induced lipid oxidation during salting of cod (Gadus morhua L.) 

      Lauritzsen, Kristin; Olsen, Ragnar L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2003-12-02)
      A model system for studying lipid oxidation of salted cod muscle was used for investigating the interaction effects of including antioxidants and copper in the brine. The results showed that ascorbate might have pro-oxidative or anti-oxidative effects depending on the ascorbate and metal concentrations. Without added copper in the brine, concentrations of ascorbate ≤500 ppm had a pro-oxidative effect. ...
    • Effects of calcium, magnesium and pH during salt curing of cod (Gadus morhua L.) 

      Lauritzsen, Kristin; Olsen, Ragnar L.; Akse, Leif; Gundersen, Bjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2004-01-08)
      The quality of heavily salted cod was investigated as influenced by adjusted levels of calcium, magnesium and pH in the salt. The investigation was carried out as a multivariate study consisting of two separate 23 full factorial designs. The chemical composition, waterholding capacity, weight and protein yields, colour and firmness were used as quality indicators or responses to the salt mixtures ...
    • Effects of dietary Lactobacillus plantarum and AHL lactonase on the control of Aeromonas hydrophila infection in tilapia 

      Liu, Wenshu; Ran, Chao; Liu, Zhi; Gao, Qian; Xu, Shude; Ringø, Einar; Myklebust, Reidar; Gu, Zemao; Zhou, Zhigang (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-20)
      This study addressed the effects of dietary Lactobacillus plantarum or/and N-acylated homoserine lactonase (AHL lactonase) on controlling Aeromonas hydrophila infection in juvenile hybrid tilapia (Oreochromis niloticus♀ × O. aureus ♂). Fish were fed Lb. plantarum subsp. plantarum strain JCM1149 (108 CFU/g feed) or/and AHL lactonase AIO6 (4 U/g) and were exposed to a chronic challenge of A. hydrophila ...
    • Effects of dietary soybean meal, inulin and oxytetracycline on gastrointestinal histological characteristics, distal intestine cell proliferation and intestinal microbiota in Atlantic salmon (Salmo salar L.) 

      Bakke-Mckellep, AM; Sperstad, Sigmund; Penn, MH; Salas, PM; Refstie, Ståle; Landsverk, Tor; Ringø, Einar; Krogdahl, Åshild (Journal article; Tidsskriftartikkel; Peer reviewed, 2007)
      Soyabean meal (SBM)-induced enteritis in the distal intestine of the teleost Atlantic salmon (Salmo salar L.) and other salmonids may be considered a model for diet-related mucosal disorders in other animals and man. The role of the intestinal microbiota in its pathogenesis was explored. Compared to diets containing fishmeal (FM) as the sole protein source, responses to extracted SBM or the prebiotic ...
    • Effects of inconsistent reporting, regulation changes and market demand on abundance indices of sharks caught by pelagic longliners off southern Africa 

      Jordaan, Gareth L.; Santos, Jorge; Groeneveld, Johan C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-24)
      The assumption of a proportional relationship between catch-per-unit-effort (CPUE) and the abundance of sharks caught by pelagic longliners is tenuous when based on fisher logbooks that report only retained specimens. Nevertheless, commercial logbooks and landings statistics are often the only data available for stock status assessments. Logbook data collected from local and foreign pelagic longline ...
    • Effects of similar intakes of marine n-3 fatty acids from enriched food products and fish oil on cardiovascular risk markers in healthy human subjects 

      Kirkhus, Bente; Lamglait, Amandine; Eilertsen, Karl-Erik; Falch, Eva; Haider, Trond; Vik, Hogne; Hoem, Nils; Hagve, Tor-Arne; Basu, Samar; Olsen, Elisabeth; Seljeflot, Ingebjørg; Nyberg, Lena; Elind, Elisabeth; Ulven, Stine Marie (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      There is convincing evidence that consumption of fish and fish oil rich in long-chain (LC) n-3 PUFA (n-3 LCPUFA), EPA (20 : 5n-3) and DHA (22 : 6n-3) reduce the risk of CHD. The aim of the present study was to investigate whether n-3 LCPUFA-enriched food products provide similar beneficial effects as fish oil with regard to incorporation into plasma lipids and effects on cardiovascular risk markers. ...
    • Efficiency of CQM Mechanism for Managing EU Fisheries: the Case of the 2011 Danish CQM-Trial 

      Msomphora, Mbachi Ruth (Conference object; Konferansebidrag, 2013-07-25)
    • The efficiency of sieve-panels for bycatch separation in Nephrops trawls 

      Santos, Juan; Herrmann, Bent; Mieske, Bernd; Krag, Ludvig Ahm; Haase, Stefanie; Stepputtis, Daniel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-11)
      This study investigated the efficiency of a sieve‐panel concept, intended to separate bycatch species from <i>Nephrops</i> (Norway lobster) in a trawl gear via mechanical and behavioural means. Four different designs of varying panel mesh size or inclination were tested in experimental fishing. For each design, the length‐dependent sieving efficiency, defined as the fraction of <i>Nephrops</i> or ...