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A study of first feeding herring (Clupea harengus L.) larvae during the period 1985- 1993
(ICES CM Documents;1993/H:21, Working paper, 1993)Hatching and distribution of first feeding larvae of Norwegian spring spawning herring have been monitored on the Norwegian shelf in March and April since 1985. During this period the spawning stock increased from 0.5 ... -
An attempt to start feed cod larvae with artificial diets
(ICES CM Documents;1981/F:14, Working paper, 1981)Larval cod were fed 8 different diets based on zooplancton and hen's eggs. All but one diets were ingested, but no growth was observed. The failure of the diets to promote growth is thouqht to be related to the low digestive ... -
An automatic feeding system for culturing rotifers with dry feed
(ICES CM Documents;1985/F:42, Working paper, 1985)An automatic feed distribution system for culturing rotifers is described and discussed. The system has been successfully used at the Austevoll Marine Aquaculture Station for 3 years. -
Artificial feeding of crabs (Cancer pagurus)
(ICES CM Documents;1970/K:18, Working paper, 1970) -
Diet of harp seals (Phoca groenlandica) feeding between the breeding and moulting seasons in the southern Barents and White Seas
(ICES CM Documents;1993/N:8, Working paper, 1993)The harp seal Phoca groenlandica is the most abundant seal species in the Barents Sea. In order to evaluate the ecological importance of the species, diet studies have recently been carried out at various times of the ... -
Diet of the harbour seal, Phoca vitulina, in the Hvaler area in 1990 and 1991, compared to the abundance of fish in the area
(ICES CM Documents;1992/N:19, Working paper, 1992)The harbour seal, Phoca vitulina, occurs in small groups along the entire coast of Norway. It is thought to interact with the commercial fisheries, both as predator and as final host for parasitic nematodes infecting ... -
Feeding and migration of Norwegian spring spawning herring in the Norwegian Sea
(ICES CM Documents;1994/R:9, Working paper, 1994)After spawning on the shelf off Møre, Western Norway, the spawning stock of Norwegian spring spawning herring migrates to the Norwegian Sea for feeding. Simultaneously, the adolescent part of the stock leaves the wintering ... -
Feeding of crabs (Cancer pagurus L.)
(ICES CM Documents;1973/K:44, Working paper, 1973) -
Fjordranching with conditioned cod
(ICES CM Documents;1987/F:29, Working paper, 1987)In June 1986, 1600 pond-reared one-year old cod were released into a fjord after being conditioned with a pulsed 160 Hz sound signal to search for food at a feeding location. Echosounders, UW-video and ultrasonic ... -
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea
(ICES CM Documents;1996/L:20, Working paper, 1996)The feeding ecology of herring was studied using samples collected during cruises in 1994 and 1995. Investigations were carried out in the Møre shelf region off western Norway where the major spawning of herring occurs, ... -
Food and feeding of young herring larvae of Norwegian spring spawners
(ICES CM Documents;1976/H:36, Working paper, 1976)The gut contents of young herring larvae sampled each hour from 4 to 9 April 1967 around a floating drogue at three depth intervals were examined to study their feeding. Copepod eggs constituated more than 90% of the ... -
Harp seal (Phoca Groenlandica) invasions in north Norwegian coastal waters: A preliminary report on age composition and feeding habits
(ICES CM Documents;1990/N:6, Working paper, 1990)Since 1978 large numbers of harp seals (Phoca groenlandica) have invaded areas of North Norway in winter and spring. In 1987 and 1988 dramatic increases occurred both in magnitude and geographic extent of these seal ... -
Hydroacoustic detection of food waste - a method to estimate maximum food intake of fish populations in sea cages
(ICES CM Documents;1990/F:7, Working paper, 1990)A linear relationship between echo energy and amount of salmon dry food was established. Measurements were carried out both for food batches (5-400 gram) and single pellets. For a certain amount of food, the echo energy ... -
Illumination in first feeding tanks for marine fish larvae
(ICES CM Documents;1992/F:6, Working paper, 1992)Illumination levels were measured in three artificially illuminated tanks: a black tank, a white tank and a tank with black sides and white bottom, in order to test how well normal tank illumination in different tank ... -
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 ... -
The influence of light and food density on the feeding success in larvae of cod (Gadus morhua L.); field and laboratory observations
(ICES CM Documents;1976/F:34, Working paper, 1976) -
Initial feeding rates of Atlantic halibut larvae (Hippoglossus hippoglossus) at different prey densities
(ICES CM Documents;1990/F:44, Working paper, 1990)At the end of yolksac stage (36 days after hatching) halibut larvae were offered the prey organism Artemia salina at different densities ranging from 1 to 100.000 litre ^- 1. The feeding experiment was carried out in 11 ... -
Live and frozen freshwater zooplankton as alternative startfeeding diets for Atlantic salmon in trays
(ICES CM Documents;1985/F:15, Working paper, 1985)Six groups of Atlantic salmon (Salmo salar) fry were starfed with frozen Daphnia longispina, standard start food type EWOS or water with natural content of live zooplankton drained from the littoral zone in a coastal ... -
Natural and cultivated zooplankton as food for halibut (Hippoglossus hippoglossus) larvae
(ICES CM Documents;1987/F:17, Working paper, 1987)Natural zooplankton were pumped into a collector and size-fractionated. The zooplankton smaller than 350 ym were fed on a diatom dominated algal suspension cultured in 3 m deep out-door plastic bags. Halibut larvae ... -
Pigmentation of salmonid - a comparison of astaxanthin and cantaxanthin as pigment sources for rainbow trout
(ICES CM Documents;1985/F:24, Working paper, 1985)Rainbow trout were fed a diet supplemented with astaxanthin and cantaxanthin. The ratios of astaxanthin to cantaxanthin were determined in plasma, faeces and flesh. During 65 days of feeding the flesh reached a level ...