Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Beltestad, Arvid K."
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Behaviour of Norwegian spring spawning herring in relation to underwater light
Beltestad, Arvid K.; Misund, Ole Arve (ICES CM Documents;1988/B:24, Working paper, 1988)The Norwegian coastal purse seiners, with shallow nets, have experienced difficulties in catching the herring due to their natura! behaviour being located too deep during day time and toe scattered during night time. ... -
Behaviour of saithe penned in different densities.
Holm, Marianne; Beltestad, Arvid K.; Chruickshank, O. (ICES CM Documents;1980/B:26, Working paper, 1980)In Norway purse seine catches of live saithe are towed to the coast and kept in net pens until the fish can be processed by the fishing industry. During penning - especially during "short-time" penning - the quality of ... -
Experience with an improved power block for purse seining
Beltestad, Arvid K. (ICES CM Documents;1983/B:30, Working paper, 1983) -
Experiments with net of hexagonal meshes in purse seine
Beltestad, Arvid K. (ICES CM Documents;1977/B:39, Working paper, 1977) -
New gear handling systems for coastal purse seining.
Beltestad, Arvid K. (ICES CM Documents;1982/B:37, Working paper, 1982)The paper is describing a new gear handling system for coastal purse seiners. The system consist of a hollow manuverable ring needle through which the purse wire is passing. Solid type rings can be used since the rings ... -
Optimization of purse seines by large meshed sections and low lead weight. Theoretical considerations, sinking speed measurements and fishing trials.
Beltestad, Arvid K.; Misund, Ole Arve (ICES CM Documents;1988/B:25, Working paper, 1988)Theoretical considerations on material requirements and sinking speed by use of different mesh size and lead weight in purse seines are outlined. Measurements confirmed that the sinking speed varied with mesh size and ... -
Recent experiments with net of hexagonal meshes in purse seines.
Beltestad, Arvid K. (ICES CM Documents;1980/B:25, Working paper, 1980) -
Relationships between the geometric dimensions and biomass of schools
Misund, Ole Arve; Aglen, Asgeir; Beltestad, Arvid K.; Dalen, John (ICES CM Documents;1990/B:41, Working paper, 1990)Acoustic measurements of the geometric dimensions and packing density of herring, sprat and saithe schools have been conducted by multi-beam sonars and echo integrator systems. Relationships between the reflected echo ... -
Selectivity experiments with topside chafers and round straps
Beltestad, Arvid K. (ICES CM Documents;1977/B:38, Working paper, 1977) -
Size-selection of mackerel and saithe in purse seine
Misund, Ole Arve; Beltestad, Arvid K. (ICES CM Documents;1994/B:28, Working paper, 1994)In purse seine fisheries, there may exist potentials for size selection because some of the fish in the catch are less than the legal size, and because different size groups are paid differently. Both potentials are ... -
Survival of mackerel and saithe escaping through sorting grids in purse seines
Beltestad, Arvid K.; Misund, Ole Arve (ICES CM Documents;1996/B:24, Working paper, 1996)Technology for efficient size-selection of mackerel and saithe in purse seines has been developed. A critical constraint for application of the technology is the survival of escaping fish. We have conducted a series of ... -
Use of acoustics in studies of fish reaction to imposed stimuli
Ona, Egil; Beltestad, Arvid K. (ICES CM Documents;1985/B:44, Working paper, 1985)The general distribution pattern of fish in a large holding pen is described through the integrated echo intensity in six separate cells using transducers mounted below the pen. The reaction of fish to different stimuli, ...