Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923"
Now showing items 101-120 of 541
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Harbor porpoise (Phocoena phocoena) in Norwegian waters
(ICES CM Documents;1991/N:16, Working paper, 1991)Recordings made on the Norwegian Sighting Survey 1988 and the North Atlantic Sighting Survey 1988 (NASS-89) indicate a divided off shore distribution during summer for harbour porpoises in Norwegian waters, with a southern ... -
Hatching of halibut (Hippoglossus hippoglossus L.) eggs under different light conditions
(ICES CM Documents;1986/F:17, Working paper, 1986)Halibut eggs were hatched in total darkness and in illumination (60 lux light). A simoultanous hatching to a final hatching of 99%, and positive buoyant larvae in the dark hatching jars were experienced. In the illuminated ... -
Health screening of wild Atlantic salmon (Salmo salar) from the Osterfjorden-area, western Norway
(ICES CM Documents;1991/M:39, Working paper, 1991)Wild Atlantic salmon (Salmo salar) were captured in four rivers in western Norway in 1989 and 1990. These were used as broodstock fish in a sea ranching project. In 1989 virological and bacteriological examinations of ... -
Herring Assessment Working Group for the Area South of 62°N [Copenhagen, 20 -30 March, 1984]
(ICES CM Documents;1984/Assess:12, Working paper, 1984) -
Herring Assessment Working Group for the Area South of 62°N [Copenhagen, 21- 31 March, 1994]
(ICES CM Documents;1994/Assess:13, Working paper, 1994) -
Herring Assessment Working Group for the Area South of 62°N [Copenhagen, 22 March - 2 April, 1993]
(ICES CM Documents;1993/Assess:15, Working paper, 1993) -
Herring assessment working group for the area south of 62°N [Copenhagen, 23 March -1 April, 1982]
(ICES CM Documents;1982/Assess:7, Working paper, 1982) -
Herring Assessment Working Group for the Area South of 62°N [ICES Headquarters, Copenhagen, 9- 18 April, 1996]
(ICES CM Documents;1996/Assess:10, Working paper, 1996) -
Ichthyophonus hoferi disease in the herring in Norwegian waters
(ICES CM Documents;1992/H:27, Working paper, 1992)After the discovery of I. hoferi disease in Norwegian spring spawning herring in summer 1991, a program for systematic surveillance of the disease in the herring in Norwegian waters was developed. The programme, which ... -
Incorporating experimentally derived estimates of survey trawl catchability into the stock assessment process
(ICES CM Documents;1997/W:5, Working paper, 1997)During the course of the April, 1996, meeting of the Fishing Technology and Fish Behavior Working Group it became clear to many that the methodology for experimentally estimating the catchability of survey trawls might ... -
Increased growth rate in Atlantic salmon parr by using a two-colour diet
(ICES CM Documents;1985/F:17, Working paper, 1985)Fishes hunting by sight are known to pay a cost of confusion when faced with high densities of uniform food particles. In such instances, awareness of other stimuli reduces feeding efficiency such that the fishes prefer ... -
Indication of high natural mortality for juvenile herring from acoustic and tagging data.
(ICES CM Documents;1980/H:62, Working paper, 1980)Natural mortality for juvenile herring (Norwegian Spring spawners) is discussed on the basis of following data: 1. Acoustic estimates of the 1975 and 1976 yearclasses of herring as 0-group and estimates from tagging ... -
Individual based spatial models with evolved fish behaviour
(ICES CM Documents;1998/J:16, Working paper, 1998)Due to spatial heterogeneity, the survival and growth of fishes depend upon their habitat. For mobile pelagic fishes, it hence becomes important to analyse the factors responsible for spatial dynamics in order to understand ... -
Individual growth rate and age at sexual maturity in rainbow trout
(ICES CM Documents;1978/F:22, Working paper, 1978)Growth rate and possible connection between growth rate and age at sexual maturity were studied on individually tagged rainbow trout from different sib groups. Great variation in growth rate and age at first sexual ... -
Industrial Fisheries Working Group [ICES headquarters, 7 -13 March, 1984]
(ICES CM Documents;1984/Assess:9, Working paper, 1984) -
Infection success of salmon lice related to temperature and implications for regional size of salmon production areas
(ICES CM Documents;2002/T:1, Working paper, 2002)The development rate for salmon lice larvae is highly temperature-dependent. Hence, the time from hatching of nauplii to an infectious copepodid will vary with the natural cycles in the sea. The salmon lice life span is ... -
Intensive production of cod fry at Austevoll. Final report.
(ICES CM Documents;1984/F:33, Working paper, 1984)The experiences of this final season of the intensive cod fry production experiment are summed up. The brood stock yielded 369 liters of cod eggs. The production experiment in plastic pens had very high survival, but ... -
Intensive production of cod fry systems and results so far
(ICES CM Documents;1983/F:24, Working paper, 1983) -
Inter-calibration of participating vessels in the ICES coordinated surveys of North Sea herring
(ICES CM Documents;1998/OPEN:23, Working paper, 1998)Summary: Three pairwise acoustic inter-calibrations of the performance of EK500 scientific echosounders were carried out in July 1997. The first inter-calibration was carried out at about 57 40'N by OE by GO Sars and ... -
Interannual variations in the liver condition index of cod as an indicator of temperature and feeding conditions in the Barents Sea
(ICES CM Documents;2001/V:31, Working paper, 2001)Background: Northeast Arctic cod, inhabiting the edge of the species area, experience variable environmental conditions and feeding resources, one of the main of them is capelin. Lipids are an important biochemical link ...