Blar i Fiskeridirektoratets skrifter, Serie Havundersøkelser (1900-1990) på tittel
Viser treff 205-224 av 314
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On the possibility of estimating year-class strength by measuring echo-abundance of 0-group fish
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1965)The possibility of estimating the distribution and abundance of 0-group fish by a combination of echo surveying and fishing experiments with pelagic trawl and purse seine is discussed. The existence of scattering layers, ... -
On the problem of the effect of fisheries on fish stocks
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)It is demonstrated by examples that morphological, physiological and behavioural features of fish developed evolutionary and normally of protective value are directly disadvantageous to the fish when subjected to intensive ... -
On the relation between echo intensity and fish density
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1976)On the relation between echo intensity and fish density. FiskDir. Skr.Ser.HavUnders., 16: 301-314. Integrated echo intensities for a wide range of fish densities were measured. The experiments were carried out on live ... -
On the Tidal Waters in the Nordåsvatn - A home-made, self-recording Tide-gauge
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1944) -
On the variability of Atlantic Influence in the Norwegian and Barents Seas
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)Variability in Atlantic influence in the regime of the Norwegian Atlantic current and its branches in the Barents Sea are studied by establishing time series of mean temperature and salinity values in four hydrographic ... -
Oppdrett av østersyngel : Forsøk utført ved Statens Utklekningsanstalt ved Flødevigen 1933 -1943
(Fiskeridirektoratets skrifter, Serie Havundersøkelser;vol 8 no 3, Research report, 1945) -
The Otholiths of the Cod - Preliminary Report
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1933) -
Oversigt over Norsk Fiskeri- og Havforskning 1900-1908
(Report on Norwegian Fishery and Marine Investigations, Research report, 1909) -
Physical variability in the sea and the consequences for fisheries hydrography
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)Progress in fisheries hydrography depends on progress in the knowledge of physical and chemical variability in the sea. This variability is caused by short term changes in the fine structure of layering in temperature, ... -
Phytoplankton Distribution in the Norwegian Sea in June, 1952 and 1953
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1960)1. The quantitative observations which have been made up to now (cp. Fig. 1) have demonstrated that the Norwegian Sea is an area where great variations are encountered in the phytoplankton vegetation. 2. Within the ... -
Phytoplankton Distribution in the Norwegian Sea in June, 1954, Related to Hydrography and Compared with Primary Production Data
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1960)I. Quantitative phytoplankton samples, collected during a cruise in the Norwegian Sea in June, 1954, by the research vessel «G. O. Sars», were worked up by means of the sedimentation metliod. Data on hydrography, primary ... -
Phytoplankton observations in offshore Norwegian coastal waters between 62°N and 69°N - I. Variation in time of the spring diatom maximum 1968-71
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1978)An attempt was made to trace yearly fluctuations in the timing of the spring diatom maximum along the Norwegian west coast, 62°N-69°N. Qantitative data on the diatom population at 281 stations with 0 m samples and 120 ... -
The plastic seabed "oyster" for measuring bottom currents
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969) -
Polymorphism of serum transferrin in cod
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1966)Sera from 682 cod from six different localities along the Norwegian coast and in the Barents Sea have been investigated by starch/agar gel electrophoresis. Eleven different patterns composed by five molecular types have ... -
Population genetic studies in cod (Gadus morhua L.) by means of the haemoglobin polymorphism; observations in a Norwegian coastal population
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1984)A total of 1205 immature and mature cod (Gadus morhua L.) of both sexes, caught during 1976-1981 in the Trondheimsfjord, Norway, were investigated in a population-genetic study by means of the polymorphic haemoglobin ... -
Populations of the deep-sea shrimp (Pandalus borealis Krøyer) in the Barents Sea
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1983)Three populations of P. borealis were identified in the open part of the Barents Sea. In the (4-1) population the females spawn each year and sex-change occurs 4 years old. This population was found in the soutwestern ... -
Predicted effects of fertilizers upon the algae production in Fern Lake
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)1. With the object of predicting effects of different amounts of fertilizers, upon the rate of primary production in Fern Lake, a bioassay was carried out in a series of 14 twenty liters glass carboys. 2. The experiment ... -
A Pressure Aquarium for Experimental Use
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1962) -
Primary growth increments in otoliths of cod larvae (Gadus morhua L.) of the Arcto-Norwegian cod stock
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1982)Primary growth increments have been detected in the otoliths of wild-caught, first-feeding cod larvae, living in a habitat where the light intensity is above the light threshold for visual feeding during 24 hours, and ... -
Primary growth rings in otoliths of Barents Sea capelin
(Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1985)Formation of primary growth rings in otoliths of Barents Sea capelin was studied both for fish of known age, from rearing in a basin, and for field-sampled fish. The numbers of growth rings were related to fish length ...