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Reaction norm analysis of fisheries-induced adaptive change and the case of the Northeast Arctic cod
(ICES CM documents, Working paper, 2002)We present a probabilistic concept of reaction norms for age and size at maturation, and outline methods that can be used for their estimation in typical fisheries data. Such estimations are critical for calibrating size- ... -
Reaction norms for age and size at maturation: study of the long-term trend (1970-1998) for Georges Bank and Gulf of Maine Atlantic cod stocks
(ICES CM documents, Working paper, 2002)Average age and size at maturation have decreased in many commercially exploited fish stocks during the last few decades. This phenomenon could be either a direct phenotypic response to some environmental variation, or the ... -
Reactions of cod (Gadus morhua L.) to smell stimuli from bait
(ICES CM Documents;1974/F:40, Working paper, 1974) -
Reactions of herring to trawling noise
(ICES CM Documents;1988/B:36, Working paper, 1988)The reaction of herring during pelagic trawl sampling has been studied by use of a high-frequency scanning sonar mounted on the headline of the trawl. The difficulties of obtaining high catch rates on shallow herring ... -
Reappearance of Norwegian spring spawning herring on spawning grounds south of 60°N
(ICES CM Documents;1989/H:22, Working paper, 1989)In spring 1989 herring spawned west of Karmøy (near Haugesund) on the Norwegian west coast. Prior to 1945 the coastal areas around Haugesund were among the most important spawning (and fishing) grounds of the Norwegian ... -
Rearing of halibut : I. Incubation and the early larval stages
(ICES CM Documents;1974/F:41, Working paper, 1974) -
Rearing of halibut larvae (Hippoglossus hippoglossis L.) to metamorphosis and beyond.
(ICES CM Documents;1980/F:9, Working paper, 1980)A female halibut caught by gill-net was stripped and the eggs were imediately fertilized and incubated in the laboratory. About 50% of the eggs hatched when incubated in a refrigerator in stagnant water treated with ... -
Recatches of marked lobster, Homarus gammarus, released in 1988
(ICES CM Documents;1991/K:7, Working paper, 1991)A pilot scale release of juvenile lobsters, Homarus gammarus, was conducted at Austevoll, western Norway in August 1988. One and two year old lobsters were marked with a brand on either the carapace or the tail. The two ... -
Recent age compositions and aberrant migration patterns of the Barents Sea stock of harp seals Phoca groenlandica
(ICES CM Documents;1996/N:4, Working paper, 1996)Since 1978, and in particular in 1986-1988, large numbers of harp seals Phoca groenlandica have invaded coastal waters of North Norway during winter and spring. After 1988 the harp seal invasions have been restricted to ... -
Recent development of the fisheries for Greenland halibut (Reinhardtius hippoglossoides, Walbaum) in northeast Atlantic waters
(ICES CM Documents;1972/F:39, Working paper, 1972) -
Recent developments on blue whiting trawls in Norway.
(ICES CM Documents;1979/B:24, Working paper, 1979)Two new blue whiting trawls with very large meshes in the front part have been tested with regard to towing resistance, operational qualities and catching efficiency. The results confirm that the large mesh design is quite ... -
Recent experiments with net of hexagonal meshes in purse seines.
(ICES CM Documents;1980/B:25, Working paper, 1980) -
Recent migration routes of Norwegian spring spawning herring
(ICES CM Documents;1992/H:18, Working paper, 1992)The migration routes of Norwegian spring spawning herring have changed considerably during the last decades. In the 1950s and beginning of the 1960s the stock spawned off the west coast of Norway in late winter, were ... -
Recent studies of the distribution and abundance of grey seals (Halichoerus grypus) in north Norway, and their possible influence on parasitic infestations in fish
(ICES CM Documents;1991/N:2, Working paper, 1991)Distributions of grey seals Halichoerus grypus were studied during aerial and ground surveys in North Norway. Surveys were conducted from Lofoten to the Soviet border during the moult (March-April, Finnmark) and breeding ... -
Recent upper layer cooling and freshening in the Norwegian Sea
(ICES CM Documents;1996/C:7, Working paper, 1996)Several time series of temperature and salinity in the Norwegian Sea indicate a general upper layer decrease in both variables. The observations indicate that this change began in about the middle of the 1960s. Time ... -
Recent variations in recruitment of Northeast Atlantic greenland halibut (Reinhardtius hippoglossoides) in relation to physical factors
(ICES CM Documents;1997/EE:6, Working paper, 1997)Based on annual bottom trawl surveys in the Barents Sea and Svalbard area in 1983-96, the paper describes variations in abundance and composition of 1-group Greenland halibut (Reinhardtius hippoglossoides). The main ... -
Recommendations for the collection of multifrequency acoustic data
(ICES CM Documents;2004/R:36, Working paper, 2004)Traditionally, collection of acoustic data has been optimised for a single frequency, while requirements for the optimal combination of multifrequency data has been given less attention. Even though data manipulation can ... -
Reconstructing the time series of abundance of Northeast Arctic cod (Gadus morhua), taking cannibalism into account [presentation]
(IMR/PINRO Joint Report Series;5/2007, Conference object, 2007) -
Reconstructing the time series of abundance of Northeast Arctic cod (Gadus morhua), taking cannibalism into account [presentation]
(IMR/PINRO Joint Report Series;5/2007, Conference object, 2007)