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1992 ICES coordinated acoustic survey of ICES divisions IVa, IVb and VIa
(ICES CM Documents;1993/H:11, Working paper, 1993)This papers provides a report on the combined acoustic survey of herring stocks in the North Sea and ICES Division IVa in July 1992. Surveys by Norway, Scotland and the Netherlands are included covering the period 24 ... -
1993 ICES coordinated acoustic survey of ICES Division IVa, IVb and VIa
(ICES CM Documents;1994/H:22, Working paper, 1994)Summary: This paper provides a report on the combined acoustic survey of herring stocks in the North Sea and ICES division IVaN in June-July 1993. The surveys were carried out by Norway, Scotland, Denmark and Netherlands ... -
1996 ICES coordinated acoustic survey of ICES Divisions IIIa, IVa, IVb and VIa
(ICES CM Documents;1997/H:11, Working paper, 1997)Summary: Seven surveys were carried out during late June and July covering most of the continental shelf north of 54°N in the North Sea and lreland to the west of Scotland to a northern limit of 62°N. The eastern edge of ... -
1997 ICES coordinated acoustic survey of ICES Division IIIa, IVa, IVb and VIa
(ICES CM Documents;1998/OPEN:22, Working paper, 1998)Summary: Six surveys were carried out during late June and july covering most of the continental shelf north of 54°N in the North Sea and lreland to the west of Scotland to a northern limit of 62°N. The eastern edge of ... -
1999 ICES coordinated acoustic survey of ICES Divisions IIIa, IVa, IVb and VIa
(ICES CM Documents;2000/K:39, Working paper, 2000)Five surveys were carried out during late June and July covering most of the continental shelf north of 54°N in the North Sea and Ireland to the west of Scotland to a northern limit of 62°N. The eastern edge of the survey ... -
A combined fish larval, phytoplankton and oceanographic survey in the Skagerrak and the Kattegat in April 1983
(ICES CM Documents;1983/L:26, Working paper, 1983) -
A method to estimate the annual larval production of the Norwegian spring-spawning herring (Clupea harengus L.)
(ICES CM Documents;1997/BB:1, Working paper, 1997)A comprehensive survey in the larval distribution area of Norwegian spring-spawning herring along the Norwegian west coast was carried out annually by the Institute of Marine Research, Bergen in the years 1986-1990. ... -
A preliminary review of the joint investigations on the distribution of herring in the Norwegian and Iceland Seas 1950- 1970
(ICES CM Documents;1996/H:14, Working paper, 1996)The paper reviews the joint international investigation of the distribution of the Atlanto-Scandian herring in relation to temperature during the period prior to the collapse of the stock in the late 1960s. The results ... -
A review of the process leading to the establishment of limit and precautionary reference points for the stock of Norwegian spring spawning herring
(ICES CM Documents;2000/X:8, Working paper, 2000)The Coastal State Regional Management Organisation agreed in October 1999 on a on a long time strategy for Norwegian spring spawning herring. Limit and precautionary reference points are fundamental parts of this long ... -
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 ... -
Absorption of acoustic energy in dense herring schools studied by the attenuation in the bottom echo signal
(ICES CM Documents;1990/B:2, Working paper, 1990)The absorption of acoustic energy in herring schools is studied by echo integration of the bottom signal under various densities of herring. The investigations were carried out in a fjord in northern Norway, where large ... -
Abundance estimation of herring hibernating in a fjord
(ICES CM Documents;1993/D:45, Working paper, 1993)A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was conducted in Ofotfjorden and Tysfjorden in December 1992. Preliminary results are reported. These include compensation for ... -
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996
(ICES CM Documents;1997/FF:13, Working paper, 1997)The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation ... -
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996
(ICES CM Documents;1996/H:33, Working paper, 1996)Standard echo integration methodology has been applied to the stock of Norwegian spring spawning herring (Clupea harengus) wintering in the Ofotfjord-Tysfjord-Vestfjord system during late autumn 1995 and early winter ... -
Acoustic abundance estimation of wintering Norwegian spring spawning herring, with emphasis on methodological aspects
(ICES CM Documents;1994/(B+D+G+H):1, Working paper, 1994)The spawning component and part of the juvenile stock of Norwegian spring spawning herring have been wintering in a fjord system in northern Norway in recent years. Conditions for measuring the stock size have been ... -
Acoustic assessment of Norwegian spring spawning herring in the wintering area, December 1995 and January 1995
(ICES CM Documents;1995/H:9, Working paper, 1995)The abundance of the mature component of the stock of Norwegian spring spawning herring has been estimated based on a series of echo integration surveys. These were performed in the wintering area of Ofotfjord, Tysfjord, and ... -
Acoustic measurements of schooling herring. Estimation of school biomass and target strength
(ICES CM Documents;1988/B:26, Working paper, 1988)The connections between reflected echo energy and dimensions of fatty herring schools were studied by a combination of multibeam sonar and a calibrated echo integration unit. A relation between the area and the biomass ... -
Acoustic portrait of herring in Vestfjord, january 1996, with geostatistical analysis
(ICES CM Documents;1996/H:31, Working paper, 1996)In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically surveyed in the wintering area. Both immature and mature fish were present. Because of the comparative lateness of the ... -
The agreed recovery plan in the management of Norwegian spring-spawning herring
(ICES CM documents, Working paper, 2003)In October 2001 the management agency (Coastal States) for Norwegian spring spawning herring agreed to a recovery plan which will become operative if the spawning stock falls below Bpa. The main element in this recovery ... -
Application of Coded Wire Tagging Technology in Pacific Herring to Investigate Stock Structure and Migration
(ICES CM documents, Working paper, 2001)Tagging of Pacific herring in British Columbia has a long history dating to the mid-1930s but uncertainty in tag recovery locations and low tag return rates limited the utility of these studies. Currently, a larger and ...