Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Aschan, Michaela"
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Catch statistics and life history of shrimp, Pandalus borealis, in the Jan Mayen area
Aschan, Michaela; Nilssen, Einar M.; Ofstad, Lise Helen; Torheim, Sverre (ICES CM Documents;1996/K:11, Working paper, 1996)The Norwegian shrimp (Pandalus borealis) fisheries in the Jan Mayen area in the North East Atlantic started in 1974. The catches reached 2000 tons in 1985. Since 1986 the catches decreased, but lately they have increased ... -
Changes in the Barents Sea fish community induced by environmental change and fishery
Aschan, Michaela; Fossheim, Maria; Primicerio, Raul (ICES CM documents;2009/ F:05, Working paper, 2009)A spatio-temporal analysis of Barents Sea survey data from the deeper parts of the Barents Sea shows a sudden change in fish community structure and abundance taking place in the mid 1980s and 1990s. The change in fish ... -
Evaluation of the Norwegian shrimp surveys conducted in the Barents Sea and the Svalbard area 1980- 1997
Aschan, Michaela; Sunnanå, Knut (ICES CM Documents;1997/Y:7, Working paper, 1997)Trawl surveys for shrimp (Pandalus borealis) have been conducted annually in the Barents Sea and the Svalbard area since 1980 by Norwegian research institutes. The surveys have been conducted in the period April to ... -
Results of Norwegian and Russian investigations of shrimp (Pandalus borealis) in the Barents Sea and Svalbard area in 1992
Aschan, Michaela; Berenboim, Boris I.; Mukhin, S.; Sunnanå, Knut (ICES CM Documents;1993/K:9, Working paper, 1993)The results of the Russian and Norwegian surveys for shrimp, Pandalus borealis, in the Barents Sea in spring and the Svalbard area in autumn 1992 are presented in this paper. The survey results are presented by nation ... -
Spatial and temporal patterns in recruitment of shrimp Pandalus borealis in the Barents Sea
Aschan, Michaela; Ådlandsvik, Bjørn; Tjelmeland, Sigurd (ICES CM documents, Working paper, 2000)The shrimp spawn in autumn and the eggs are carried as out roe by the females until spring when the larvae hatch. Within a period of 2-3 months the shrimp larvae settle to the bottom. Today’s assessment and forecast of ... -
Spatial variation and structural change of the Barents Sea fish community
Fossheim, Maria; Johannesen, Edda; Primicerio, Raul; Aschan, Michaela (ICES CM documents;2009/ E:21, Working paper, 2009)We document the spatial patterns found in the Barents Sea fish community in relation to environmental parameters, analysing data from the ecosystem surveys covering the Norwegian part of the Barents Sea during 2004-2008 ...