Výsledky vyhledávání - "Karl-Johan Stæhr"

Effect of spatial differences in growth on distribution of seasonally co-occurring herring Clupea harengus stocks

Autor: Karl-Johan Stæhr, Henrik Mosegaard, Lotte Worsøe Clausen, Anna Rindorf

Publikováno v: Journal of Fish Biology. 86:228-247

The mechanisms most likely to determine the distribution of the two major herring Clupea harengus stocks in their common early summer feeding ground in the eastern North Sea, Skagerrak and Kattegat were investigated through analysis of acoustic surve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::163e9d610a2c0448e52864f09a20805a
https://doi.org/10.1111/jfb.12571

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Spatial interactions between marine predators and their prey: herring abundance as a driver for the distributions of mackerel and harbour porpoise

Autor: Kim N. Mouritsen, Signe Sveegaard, Karl-Johan Stæhr, Torben Filt Jensen, Jacob Nabe-Nielsen, Jonas Teilmann

Publikováno v: Svegaard, S, Nielsen, J N, Stæhr, K-J, Jensen, T F, Mouritsen, K N & Teilmann, J 2012, ' Spatial interactions between marine predators and their prey: herring abundance as a driver for the distributions of mackerel and harbour porpoise ', Marine Ecology Progress Series, vol. 468, pp. 245-253 .
Sveegaard, S, Nabe-Nielsen, J, Stæhr, K-J, Jensen, T F, Mouritsen, K N & Teilmann, J 2012, ' Spatial interactions between marine predators and their prey : herring abundance as a driver for the distributions of mackerel and harbour porpoise ', Marine Ecology-Progress Series, vol. 468, pp. 245-253 . https://doi.org/10.3354/meps09959

The distribution of marine predators is tightly coupled with that of their prey, and may also be affected by interactions between competing predators. In order to adopt an ecosystem approach to the management of a species, it is essential to understa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ea353f4d99cd647278002710c0900c6
https://doi.org/10.3354/meps09959

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Prediction of selectivity from morphological conditions: Methodology and a case study on cod (Gadus morhua)

Autor: Ludvig Ahm Krag, Niels Madsen, Karl-Johan Stæhr, Bo Lundgren, Rikke Frandsen, Bent Herrmann

Publikováno v: Fisheries Research. 97:59-71

The FISHSELECT methodology, tools, and software were developed and used to measure the morphological parameters that determine the ability of cod to penetrate different mesh types, sizes, and openings. The shape of one cross-section at the cod's head

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f8ef08589e11f5f3f1d9ba39b6bd8d5
https://doi.org/10.1016/j.fishres.2009.01.002

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Adaptive fisheries management in Vietnam

Autor: Frank Riget, Holger Hovgård, Dao Manh Son, Nguyen Thi Dieu Thuy, Karl-Johan Stæhr, Jesper Raakjær, Phung Giang Hai, Kristine Ellegaard, Dang Van Thi

Publikováno v: Marine Policy. 31:143-152

Vietnam is in the process of introducing adaptive management based on indicators and time-series to manage its marine fisheries. The development of indicator-based frameworks for fisheries management has accelerated in recent years. This article desc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::457dde722a37ee94ae3bccd0373eac8f
https://doi.org/10.1016/j.marpol.2006.05.013

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Selectivity experiments to estimate the effect of escape windows in the Skagerak roundfish fishery

Autor: Niels Madsen, Karl-Johan Stæhr

Publikováno v: Fisheries Research. 71:241-245

The objectives were to measure roundfish selectivity and to test if square-mesh windows inserted in the codend could improve the selectivity. Sea trials were conducted with a commercial trawler in the Skagerak area. Three codend types were tested: (1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::518f1cf27e0e402d3b5a6cc7c7e112e0
https://doi.org/10.1016/j.fishres.2004.08.019

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Distribution, density and abundance of the western Baltic herring (Clupea harengus) in the Sound (ICES Subdivision 23) in relation to hydrographical features

Autor: J. Rasmus Nielsen, Karl-Johan Stæhr, Torben Filt Jensen, Bo Lundgren

Publikováno v: Fisheries Research. 50:235-258

Biomass and duration of the over-wintering period of the Rugen spring spawning herring stock (RHS) in the Sound (ICES Subdivison 23) were investigated as well as possible hydrographical factors affecting relative distribution and triggering southward

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::021f7a0ed96d20a39c2ad9b9b57a307d
https://doi.org/10.1016/s0165-7836(00)00220-4

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An Atlantic herring (Clupea harengus) size selection model for experimental gill nets used in the Sound (ICES Subdivision 23)

Autor: Søren Poulsen, Karl-Johan Stæhr, J. Rasmus Nielsen, René Holst

Publikováno v: Canadian Journal of Fisheries and Aquatic Sciences. 57:1551-1561

Size selection investigations were performed in the Sound with experimental, multipanel gill nets equipped with a broad range of mesh sizes targeting Atlantic herring (Clupea harengus). Each of the 20 experimental fishery surveys covered the central

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dad96b99e08096b206d453125b41553f
https://doi.org/10.1139/f00-087

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