Data/hora: 10/06/2024 11:04:04

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Campagnes expérimentales de chalutage en mer du Nord et Manche Orientale. Volume I. Les campagnes I.B.T.S. 1997 &amp; 1998	
Autores: 	Verin, Yves; Dufour, Jean-louis.	
Data: 	1999-08	
Ano: 	1999	
Palavras-chave: 	Mer du Nord. CIEM; Recrutement; Stocks de poissons; Indices d'abondance; Chalutage; Campagne d'échantillonnage; Mer du Nord; [CES; Recruitment; Fish stocks; Abundance indices; Trawling; Survey.	
Resumo: 	Since 1976, France participates to the International Bottom Trawl Survey (IBTS), coordinated by the International Council for Exploration of the Sea (ICES). The main objective of the survey which is carried out on board of a research vessel, is to obtain annual forecasts of recruitment for the various commercial fish species of the North Sea. These estimates are used by ICES Working Groups to assess these various stocks and to propose management measures for the following year. In addition, the data collected during these surveys concern biological and abundance analysis of main commercial fish species exploited by European countries in the North Sea. The results of studies are published in scientific papers and have improved knowledge in this field. Working methods are standardised in order to keep consistency in results. For instance, the trawl used (Grande Ouverture Verticale net) is the same on each research vessel.. During the surveys, all species sampled are identified, weighted (total or sample) and measured. For the main fish species, (gadoids, clupeoids and flatfish) sex, maturity stages are determinated and otoliths sampled for ageing estimates. Data on the trawling stations are recorded in real time and included in the biological data base. Surface and bottom temperatures and salinities are also recorded. In this preliminary report, the results of the French survey carried out in February 97 and February 98, on board of the R/V Thalassa are presented. The surveyed area covered by France in the North Sea is located south of 56° 3(7 latitude North.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/00306/41760/40973.pdf

http://archimer.ifremer.fr/doc/00306/41760/	
Formato: 	application/pdf	
Fonte: 	1999 Ifremer

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