Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "stock assessment"
Now showing items 121-140 of 660
-
Limiting inter-annual variation in total allowable catch strategies. An application to ICES roundfish stocks
(ICES CM Documents;2003/X:7, Working paper, 2003)This study evaluated through simulation management strategy that stabilise catch levels by setting bounds on the inter-annual variability in Total Allowable Catches (TACs). An integrated modelling approach was used, which ... -
Lobster (Homarus gammarus) catches in southwestern Norway, including the first recaptures of previously released juveniles
(ICES CM Documents;1993/K:29, Working paper, 1993)Since 1990, 20-30 000 tagged lobster juveniles have been released each year at Kvitsøy, south west Norway, by the Institute of Marine Research. In 1992 the first 19, legally sized lobsters, of these releases were caught. ... -
Long rough dab (Hippoglossoides platessoides) of the Barents Sea and Svalbard area: ecology and resource evaluation
(ICES CM Documents;1994/O:8, Working paper, 1994)Based on data from Norwegian and Russian bottom trawl surveys in the years 1988-1993, the paper considers distribution, population structure, growth and reproduction of long rough dab (Hippoglossoides platessoides) of ... -
Measurements of Target stength and Spatial Orientation of Euphausiids (krill).
(ICES CM Documents;1981/B:l7, Working paper, 1981) -
Measuring the effect of changes in catchability on the variance of marine survey abundance indices
(ICES CM Documents;1992/D:9, Working paper, 1992)The average catch per tow by a research vessel survey is often used as an index of abundance. An estimate of the variance of such indices that is based only on the between station variability in catch may underestimate ... -
Measuring uncertainty in trawl surveys: implementation in DATRAS
(ICES CM documents, Working paper, 2006)Abstract The basic data from several ICES coordinated trawl and beam trawl surveys in the Baltic Sea, the North Sea, the area west of Scotland and France are stored in the DATRAS database in the ICES Secretariat; every ... -
Migration of western mackerel to the North Sea 1973 - 1988
(ICES CM Documents;1989/H:20, Working paper, 1989)The latest years, it is evident that most of the mackerel present in the North Sea belongs to the Western stock, since the yearly catches by far exceed the presumed size of the North Sea stock. The Norwegian tagging ... -
Migrations and stock size of herring in the northern North Sea in 1966; analyses of Norwegian tagging experiments
(ICES CM Documents;1972/H:29, Working paper, 1972)8000 herring were tagged with internal steel tags in the summer of 1966; 4000 were released in the north-eastern North Sea and 4000 east of Shetland. On the basis of returned tags during the first year after tagging, ... -
Minutes of the Advisory Committee on Ecosystems [ICES Secretariat, 19- 23 May, 2003]
(ICES CM Documents;2003/MCAP:3, Working paper, 2003) -
Minutes of the Advisory Committee on the Marine Environment [Højstrupgaard, 5- 9 June, 2001]
(ICES CM Documents;2001/A:4, Working paper, 2001) -
Minutes of the Advisory Committee on the Marine Environment [ICES Secretariat, 3- 7 June, 2002]
(ICES CM Documents;2002/A:5, Working paper, 2002) -
Monitoring changes in abundance of gadoids with varying availability to surveys
(ICES CM Documents;1991/G:76, Working paper, 1991)The use of scientific survey data for assessing abundance of commercially important fish stocks has become a managerial necessity in many regions. Errors and bias in estimates from such surveys may thus have great economic ... -
Monitoring ecosystems using research surveys; maximizing information and minimizing cost
(ICES CM Documents;2002/J:5, Working paper, 2002)Indices or estimates of abundance generated by research vessel surveys are becoming ever more important for assessing marine resources. Most often survey abundance indices are used in conjunction with commercial catch data ... -
Mutual impact of wild and cultured Atlantic salmon in Norway
(ICES CM Documents;1988/Mini:5, Working paper, 1988)The development and current status of the fish farming industry, enhancernent and sea ranching of salmon in Norway are briefly described, and an account is given of the natural salmon river populations in different parts ... -
NAFO/ICES Pandalus Assessment Group Meeting [20–27 October 2010 ICES Headquarters, Copenhagen Denmark]
(ICES CM documents;2010/ACOM:14, Working paper, 2010) -
NAFO/ICES Pandalus Assessment Meeting, [24 October-1 November 2007]
(ICES CM documents;2007/ACFM:32, Working paper, 2007) -
NEA saithe XSA runs with different survey tuning series
(Working paper, 2010-02)New tuning series from a combined and improved survey gives lower and more stable S. E. Log q residuals than the tuning series presently used. However, the retrospective trend is still poor and the estimates of F and SSB ... -
North-East Arctic Fisheries Working Group : Report of the Meeting at Copenhagen, December 4th-14th 1967
(ICES CM Documents;1968/F:19, Working paper, 1968) -
North-East Arctic Fisheries Working Group : Report of the Meeting at Copenhagen, Januar 13th-17th 1969
(ICES CM Documents;1969/F:2, Working paper, 1969) -
Norwegian acoustic survey of North East Arctic cod on the spawning grounds off Lofoten
(ICES CM Documents;1997/Y:18, Working paper, 1997)An acoustic survey of the spawning stock of North East Arctic Cod off Lofoten has been performed annually in March-April since 1982. The estimates for 1985-1997 have been recalculated and mean length and weight at age ...