Browsing Brage IMR by Journals "Rapports et Procès-Verbaux des Réunions"
Now showing items 1-16 of 16
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Biology and population dynamics of the Norwegian spring- spawning herring
(Journal article; Peer reviewed, 1980) -
Biology, exploitation, and management of the northeast atlantic mackrel
(Journal article; Peer reviewed, 1980) -
Comparative studies of theoretical and empirical target-strength models of euphausiids (krill) in relation to field-experiment data
(Conference object, 1990)The authors considered complete and truncated fluid-sphere models, an approximate fluid-sphere model, complete and truncated fluid finite-length cylinder models, and an empirical model considered as a hybrid fluid bubble/fluid ... -
Day and night fish distribution pattern in the net mouth area of the Norwegian bottom-sampling trawl
(Journal article; Peer reviewed, 1990)A high-frequency scanning sonar, mounted as a net sonde, was used to study fish behaviour in the mouth area of the Norwegian bottom-sampling trawl. Fish distribution patterns were significantly different by day and night. ... -
Echo abundance indices of 0-group fish in the Barents Sea, 1965-1972
(Journal article; Peer reviewed, 1977)In order to obtain estimates of year class strength of 0-group fish, joint international surveys have been conducted each year since 1965 in the Barents Sea. The density of fish has been estimated by visual grading of the ... -
The effect of recent changes in the North Sea mackerel fishery on stock and yield
(Journal article; Peer reviewed, 1978)The paper deals with biological aspects and exploitation of the mackerel (Scomber scombrus) stocks occurring in the North Sea. The state of stocks and exploitation in the North Sea area are investigated on the basis of ... -
Fish behaviour and acoustic sampling
(Conference object, 1990)Fish behaviour may lead in several ways to uncertainties in acoustic abundance estimation. Practical echo-surveying work faces a number of situations where aspects of fish behaviour may be of importance. Unfavourable ... -
Fish reaction to trawling noise: The significance for trawl sampling
(Conference object, 1990)The reactions of fish during trawling were observed with a stationary echo sounder as a trawling vessel passed close to the transducer. Several strong, downward avoidance reactions of haddock (Melanogrammus aeglefinus ) ... -
Fluctuations in the great fisheries of Northern Europe viewed in the light of biological research
(Journal article; Peer reviewed, 1914-04) -
Mortality of herring during the early larval stage in 1967
(Journal article; Peer reviewed, 1971) -
Relationship of parent stock size and year class strength in Norwegian spring spawning herring
(Journal article; Peer reviewed, 1973) -
Session 9: Rapporteur's review. Introduction and edited discussion
(Conference object, 1990)Acoustic classification of fish must be one of the few notions in our business that appeals to the popular imagination, both among laymen and non-fisheries scientists. Just estimating fish density by acoustics has been a ... -
Some results of abundance estimation studies with echo integrators
(Journal article; Peer reviewed, 1977)Two examples of acoustic fish stock abundance estimation are given. The first is the estimation of the exploited Barents Sea capelin stock; the second is measurement of the size of the unexploited blue whiting stock. Surveys ... -
Sonar observations of schooling herring: School dimensions, swimming behaviour, and avoidance of vessel and purse seine
(Conference object, 1990)Horizontal dimensions and swimming and avoidance behaviour of herring schools were quantified by means of a multi-beam, true-motion sonar. The schools were usually elliptical with an average length to width ratio of about ... -
Target strength measurements of fish
(Journal article; Peer reviewed, 1977)During the summer of 1971, target strength measurements of fish were made at two frequencies, 38 kHz and 120 kHz. The relationships between dorsal aspect target strength and fish length were worked out for four species. ... -
Target tracking with a split-beam echo sounder
(Conference object, 1990)The split-beam technique makes it possible to determine the precise location of a fish in the acoustic beam. This is a very useful feature, as it permits behavioural observations to be conducted without disturbing the fish. ...