Now showing items 1-20 of 221

    • 1992 ICES coordinated acoustic survey of ICES divisions IVa, IVb and VIa 

      Simmonds, E. John; Dommasnes, Are; Aglen, Asgeir (ICES CM Documents;1993/H:11, Working paper, 1993)
      This papers provides a report on the combined acoustic survey of herring stocks in the North Sea and ICES Division IVa in July 1992. Surveys by Norway, Scotland and the Netherlands are included covering the period 24 ...
    • 1993 ICES coordinated acoustic survey of ICES Division IVa, IVb and VIa 

      Simmonds, E. John; Dommasnes, Are; Corten, A.; Pedersen, Jan Per; Reid, David (ICES CM Documents;1994/H:22, Working paper, 1994)
      Summary: This paper provides a report on the combined acoustic survey of herring stocks in the North Sea and ICES division IVaN in June-July 1993. The surveys were carried out by Norway, Scotland, Denmark and Netherlands ...
    • 1994 ICES coordinated acoustic survey of ICES Divisions IVa, IVb, VIa and VIIb 

      Simmonds, E. John; Toresen, Reidar; Corten, A.; Pedersen, Jan Per; Reid, David; Fernandes, Paul G. (ICES CM Documents;1995/H:15, Working paper, 1995)
      Summary: Six surveys were carried out during late June and July covering most of the continental shelf North of 54°N in the North Sea and Ireland to the west of Scotland to a northern limit of 62°N. The eastern edge of ...
    • 1995 ICES coordinated acoustic survey of ICES Divisions IVa, IVb, VIa and VIIb 

      Simmonds, E. John; Toresen, Reidar; Corten, A.; Pedersen, Jan Per; Reid, David; Fernandes, Paul G.; Hammer, Cornelius (ICES CM Documents;1996/H:8, Working paper, 1996)
      Summary: Seven surveys were carried out during late June and July covering most of the continental shelf North of 54°N in the North Sea and Ireland to the west of Scotland to a northern limit of 62°N. The eastern edge ...
    • 1996 ICES coordinated acoustic survey of ICES Divisions IIIa, IVa, IVb and VIa 

      Simmonds, E. John; Bailey, David M.; Toresen, Reidar; Couperus, Bram; Pedersen, Jan Per; Reid, David; Fernandes, Paul G.; Hammer, Cornelius (ICES CM Documents;1997/H:11, Working paper, 1997)
      Summary: Seven surveys were carried out during late June and July covering most of the continental shelf north of 54°N in the North Sea and lreland to the west of Scotland to a northern limit of 62°N. The eastern edge of ...
    • 1997 ICES coordinated acoustic survey of ICES Division IIIa, IVa, IVb and VIa 

      Simmonds, E. John; Bailey, M.C.; Toresen, Reidar; Torstensen, Else; Couperus, Bram; Pedersen, Jan Per; Reid, David; Hammer, Cornelius (ICES CM Documents;1998/OPEN:22, Working paper, 1998)
      Summary: Six surveys were carried out during late June and july covering most of the continental shelf north of 54°N in the North Sea and lreland to the west of Scotland to a northern limit of 62°N. The eastern edge of ...
    • 1999 ICES coordinated acoustic survey of ICES Divisions IIIa, IVa, IVb and VIa 

      Simmonds, E. John; Toresen, Reidar; Torstensen, Else; Zimmermann, Christopher; Götze, Eberhard; Reid, David; Couperus, Bram (ICES CM Documents;2000/K:39, Working paper, 2000)
      Five surveys were carried out during late June and July covering most of the continental shelf north of 54°N in the North Sea and Ireland to the west of Scotland to a northern limit of 62°N. The eastern edge of the survey ...
    • 2000 ICES coordinated acoustic survey of ICES Division IIIa, IVa, IVb and VIa (North) 

      Simmonds, E. John; Svendsen, Bjørn V.; Torstensen, Else; Fernandes, Paul G.; Reid, David; Couperus, Bram; Staehr, K. J.; Zimmermann, Christopher; Götze, Eberhard (ICES CM Documents;2001/P:28, Working paper, 2001)
      Six surveys were carried out during late June and July covering most of the continental shelf north of 54°N in the North Sea and to the west of Scotland to a northern limit of 62°N. The eastern edge of the survey area ...
    • Absorption of acoustic energy in dense herring schools studied by the attenuation in the bottom echo signal 

      Toresen, Reidar (ICES CM Documents;1990/B:2, Working paper, 1990)
      The absorption of acoustic energy in herring schools is studied by echo integration of the bottom signal under various densities of herring. The investigations were carried out in a fjord in northern Norway, where large ...
    • Abundance estimation of pelagic fish stocks by acoustic surveying 

      Foote, Kenneth G. (ICES CM Documents;1991/B:33, Working paper, 1991)
      The echo integration technique is outlined. Weaknesses are identified and remedies described. While the technique is adequate for surveying some stocks, improvements are necessary for its proper application to others. ...
    • Acoustic abundance estimate of 0-group north-east Arctic cod and haddock 

      Hylen, Arvid (ICES CM Documents;1997/BB:15, Working paper, 1997)
      The abundance of the 1991-1994-year classes of north-east Arctic cod and haddock at the age of six month have been estimated on the basis of Norwegian acoustic data from the International 0-group fish survey in the Barents ...
    • Acoustic abundance estimation of the Icelandic stock of capelin : 1978-1982 

      Vilhjálmsson, Hjálmar; Reynisson, Páll; Hamre, Johannes; Røttingen, Ingolf (Working paper, 1982)
      During the period October 1978 - february 1982 several abundance estimates and yearclass composition of the Icelandic capelin stock were obtained by acoustic methods. Surveying has been carried out in July-Agust, September, ...
    • Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 

      Foote, Kenneth G.; Ostrowski, Marek; Røttingen, Ingolf; Engås, Arill; Hansen, Kaare A.; Hauge, Kjellrun Hiis; Skeide, Roar L.; Slotte, Aril; Torgersen, Øyvind (ICES CM Documents;1996/H:33, Working paper, 1996)
      Standard echo integration methodology has been applied to the stock of Norwegian spring spawning herring (Clupea harengus) wintering in the Ofotfjord-Tysfjord-Vestfjord system during late autumn 1995 and early winter ...
    • Acoustic abundance estimation of wintering Norwegian spring spawning herring, with emphasis on methodological aspects 

      Røttingen, Ingolf; Foote, Kenneth G.; Huse, Ingvar; Ona, Egil (ICES CM Documents;1994/(B+D+G+H):1, Working paper, 1994)
      The spawning component and part of the juvenile stock of Norwegian spring spawning herring have been wintering in a fjord system in northern Norway in recent years. Conditions for measuring the stock size have been ...
    • Acoustic and Bottom Trawl Surveys; How Much Information Do They Provide for Assessing the Northeast Arctic Cod Stock? 

      Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd; Pennington, Michael (ICES CM documents, Working paper, 1999)
      Acoustic and bottom trawl surveys of the Northeast Arctic cod stock provide fishery independent estimates of trends in abundance and population characteristics. Given the recent uncertainties in the catch based assessment ...
    • Acoustic backscatter from zooplankton and fish explored through an optimized model framework 

      Lebourges-Dhaussy, A.; Knutsen, Tor; Korneliussen, Rolf J. (ICES CM Documents;2004/R:39, Working paper, 2004)
      The purpose of this work has been to test complementary methods in order to classify marine organisms, with particularly attention to zooplankton and fish. Algorithms to separate fish and zooplankton have been developed ...
    • Acoustic estimates of abundance of 0-group gadoids in the northern North Sea in July 1985 

      Lahn-Johannessen, John (ICES CM Documents;1986/G:28, Working paper, 1986)
      This paper presents the results from a joint survey with two research vessels in July 1985. Total estimates of abundance (N x 10-9 ), were: Norway pout 56, haddock 52, whiting 66 and cod 4. Comparisons are made with a ...
    • Acoustic estimates of saithe in the North Sea in 1984 and 1985 

      Smedstad, Odd M. (ICES CM Documents;1985/G:14, Working paper, 1985)
      This paper describes the results from a joint cruise in July 1984 with two vessels, and the results from two cruises in February - March 1985. In July the saithe were standing well above the bottom, but the saithe were ...
    • Acoustic estimates of saithe in the North Sea in 1985 and 1986 

      Smedstad, Odd M. (ICES CM Documents;1986/G:49, Working paper, 1986)
      This paper describes the results from a joint cruise in July 1985 with two vessels, and the results from one cruise in February 1986. The acoustic estimates agree fairly well with the estimates made by the North Sea ...
    • Acoustic estimates of spawning cod off Lofoten and Møre in 1985 

      Godø, Olav Rune; Raknes, Askjell; Sunnanå, Knut (ICES CM Documents;1985/G:66, Working paper, 1985)
      The annual surveys on the spawning stock of North-east Arctic cod were carried out in the Lofoten and Møre areas in March- April 1985. These surveys were undertaken to estimate the size and age structure of the spawning ...