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  • 1
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    Biologie des Stöckers in Nordsee und Nordostatlantik (2021)
    In:  christopher.zimmermann@vti.bund.de | http://aquaticcommons.org/id/eprint/3302 | 1240 | 2012-11-10 17:50:14 | 3302 | Bundesforschungsanstalt für Fischerei
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    Publication Date: 2021-06-27
    Description: This paper summarises the current knowledge on horse mackerel (Trachurus trachurus) biology. The synopsis is mainly based on the report of a recently conducted EU funded workshop on horse mackerel age reading. A brief description of this workshop and of recent developments in sampling of German commercial horse mackerel catches is given.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
    Keywords: Management ; Fisheries ; Biology ; stock assessment ; otolith reading ; migration ; recruitment ; physiology ; ecology ; fisheries management ; horse mackerel ; Trachurus trachurus ; Atlantic
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 14-23
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  • 2
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    Bestandserfassung und -überwachung des atlanto-skandischen Herings. EU-Studie "Hydroacoustic Surveys of Atlanto-Scandian Herring in the Norwegian Sea, 1998-2000 (ASH-II)" (2021)
    In:  cornelius.hammer@vti.bund.de | http://aquaticcommons.org/id/eprint/3309 | 1240 | 2012-11-10 17:54:48 | 3309 | Bundesforschungsanstalt für Fischerei
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    Publication Date: 2021-06-27
    Description: The atlanto-scandian herring consists of two major stocks, i.e. the Icelandic summer spawner and the Norwegian spring spawner. Both stocks have recovered well after complete collapse in the seventies and allow for a controlled fishery. The total allowable catch of the Norwegian spring spawner is currently 1.3 mill. t. The resumption of the fishery is accompanied by an annual and multi-nationalsurvey with Norwegian, Faeroe Islands, Icelandic and Russian contribution. In 1998 the EU will contribute to the survey with the Swedish vessel ”Argos” and in 1999 with the ”Walther Herwig III” under Dutch, Swedish and German participation. About half of the survey costs are covered by the EU by means of a funded study, the other half is contributed by the participating nations.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
    Keywords: Management ; Fisheries ; assessment ; stock management ; fisheries management ; scientific advice ; sustainable fisheries ; recruitment ; catch processing ; herring
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 12-15
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  • 3
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    Lage und Entwicklung der Fischereiressources in Hinblick auf deutsche Fischereiinteressen (2021)
    In:  cornelius.hammer@vti.bund.de | http://aquaticcommons.org/id/eprint/3321 | 1240 | 2020-08-23 06:06:55 | 3321 | Bundesforschungsanstalt für Fischerei
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    Publication Date: 2021-06-27
    Description: The northern European fish stocks are assessed annually by ICES working groups. The results are evaluated biannually in two meetings of the Advisory Committee for Fisheries Management (ACFM) at ICES. Based on the working group assessments, ACFM formulates an advice for fisheries management and suggests a total allowable catch (TAC) which is based strictly on biological grounds. The summaries of the state of some selected stocks which are given here, are derived from the ACFM advice, formulated during the most recent May 1998 meeting. For many of the fish stocks the precautionary approach is still in the process of implementation, and only for some of them the management and target reference points have been fully defined.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
    Keywords: Management ; Fisheries ; fisheries management ; assessment ; scientific advice ; recruitment ; stock data
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 73-81
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  • 4
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    Die Situation der Makrelen- und Stöckerbestände. Der deutsche Beitrag zur internationalen Bestandsabschätzung (2021)
    In:  cornelius.hammer@vti.bund.de | http://aquaticcommons.org/id/eprint/3319 | 1240 | 2012-11-10 17:55:35 | 3319 | Bundesforschungsanstalt für Fischerei
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    Publication Date: 2021-06-27
    Description: The question has not yet been completely solved whether or not the mackerel and horse mackerel stocks in the waters from the Bay of Biscay to the Atlantic off the Norwegian coast are independent unit stocks or must be regarded rather as one stock with distinct stock components. The stock definition, however, is the basis for fishery management and is fundamental for the exploitation of the stocks. For this reason the extensive mackerel and horse mackerel egg survey carried out in 1998, is of high importance and significance for the fishery management of the two species. The survey has begun in January in Iberianwaters and will eventually end in the autumn north of Scotland. To cope with this task research vessels of eight European nations are participating.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
    Keywords: Management ; Fisheries ; fisheries management ; scientific advice ; stock management ; recruitment ; spawning stock ; Scomer scombrus ; Trachurus trachurus ; mackerel
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 63-67
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  • 5
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    Die vertikale Verteilung von Heringslarven im Greifswalder Bodden (2021)
    In:  julia.heiler@web.de | http://aquaticcommons.org/id/eprint/10206 | 1240 | 2012-11-11 19:28:41 | 10206 | Johann Heinrich von Thünen-Institut, Bundesforschungsinstitut für Ländliche Räume, Wald und Fischerei
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    Publication Date: 2021-06-30
    Description: KurzfassungIm Rahmen einer Bachelorarbeit wurde untersucht, ob die Larven des frühjahrslaichenden Herings der westlichen Ostsee im Greifswalder Bodden eine inhomogene vertikale Verteilung aufweisen, da in bisherigen Studien aufgrund der niedrigen Gewässertiefe des Boddens von hydrografischer Durchmischung und somit homogener Ichthyoplanktonverteilung ausgegangen wurde. Dazu wurden zwei Nullhypothesen überprüft, eine, die annimmt, dass Heringslarven allgemein im Greifswalder Bodden homogen verteilt sind, eine zweite, nach der auch verschiedenen Längenklassen der Heringe homogen verteilt sind. Die Proben, die Mitte April an drei verschiedenen Stationen im Greifswalder Bodden genommen wurden, zeigten signifikante Unterschiede der Larvenabundanzen allgemein zwischen den beprobten Tiefenstufen als auch der Längenklassen zwischen den Tiefenstufen, sodass beide Nullhypothesen abzulehnen sind. Eine homogene Verteilung der Heringslarven kann ausgeschlossen werden. AbstractLarvae of the Western Baltic Spring Spawning Herring were sampled in the Greifswalder Bodden in the course of a Bachelor Thesis to investigate whether they are inhomogeneously vertically distributed. Previous research assumed homogeneous vertical distribution because of the shallowness of the Greifswalder Bodden due to hydrographical mixing of the water and the ichthyoplankton. Two null hypotheses were tested, one which presumes even vertical distribution of the herring larvae and another which presumes even vertical distribution within different length classes in the Greifswalder Bodden. Sampling took place at three different stations in the Greifswalder Bodden during April and results showed significant differences of the larvae abundances between the sampled depths and also significant differences of the length classes between the sampled depths. Therefore both null hypotheses can be rejected and a homogeneous vertical distribution of the herring larvae in the Greifswalder Bodden can be excluded.
    Description: Johann Heintrich von Thünen-Institute, Federal Research Institute of Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung-Information on Fishery Research in 2012
    Keywords: Fisheries ; herring ; Clupea harengus ; Baltic Sea ; recruitment ; larvae ; distribution
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 25-29
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  • 6
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    Deutscher Beitrag zum internationalen Makrelen(Scomber scombrus) und Stöcker- (Trachurus trachurus) Eier-Survey (2021)
    In:  cornelius.hammer@vti.bund.de | http://aquaticcommons.org/id/eprint/4189 | 1240 | 2012-11-10 18:46:11 | 4189 | Bundesforschungsanstalt für Fischerei
    Details
    Publication Date: 2021-06-30
    Description: Based on the results from egg and larvae surveys, mackerel and horse mackerel are thought to form three more or less distinct stocks each in the North Sea and in the waters west of the British Isles. These are firstly the southernstocks in the southern part of the English Channel, Celtic Sea and Bay of Biscay, secondly the North Sea and finally the western stocks of both species, loeated between the Shetlands and southern Norway. It is argued here that in view of the high mobility and the extended seasonal migrations of both species a c1ear separation of the stocks can hardly be maintained. In this context the results of the 1995 mackerel and horse mackerel egg survey to the southern spawning location is presented.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010
    Keywords: Fisheries ; stock management ; recruitment ; stock data ; eggs ; spawning areas ; stock development
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 61-64
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