Consulta: subjectFacets:"Indices d'abondance"
Registros recuperados: 4
Data/hora: 05/06/2024 16:09:34

International Program of Standardised Trawl Surveys
Provedor de dados: 5
Autores: Mahe, Jean-claude.
The IPROSTS project had two main objective : - Completionn of research vessel surveys in the autumn of 1999 and 2000 in ICES areas VI, VII and VIII in order to provide abundance indices at age for the major commercial species exploited in these areas, - Standardisation of the methodology used in bottom trawl surveys.  For completion of the first objective, the French Research institute IFREMER conducted surveys in the Celtic Sea and the Bay of Biscay on board the Research Vessel, Thalassa. The Marine Institute of Dublin conducted surveys in the Irish Sea and Celtic Sea on board the Research Vessel Celtic Voyager and in the Western area of Ireland on board two chartered commercial fishing vessels (Marliona and Shauna Ann). The Marine Laboratory of Aberdeen...
Tipo: Text
Palavras-chave: Irish sea; Celtic sea; Abundance indices at age; Gear performance; Sampling stratégies; Species distribution; Conversion coefficients; Gear calibration; Trawl surveys; Bottom trawl; Mer d'Irlande; Mer Celtique; Indices d'abondance; Performance technique; Stratégies d'échantillonnage; Distribution des espèces; Coefficients de conversion; Calibration d'engins; Campagne de chalutage; Chalut de fond.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/rapport-2250.pdf

Campagnes expérimentales de chalutage en mer du Nord et Manche Orientale. Volume I. Les campagnes I.B.T.S. 1997 &amp; 1998
Provedor de dados: 5
Autores: Verin, Yves; Dufour, Jean-louis.
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....
Tipo: Text
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.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00306/41760/40973.pdf

Evaluation des ressources halieutiques de l'ouest de l'Europe (EVHOE) par campagnes de chalutages programmes : Deuxième phase : Distribution saisonnière et évaluation des ressources halieutiques du golfe de gascogne.
Provedor de dados: 5
Autores: Ifremer, -.
Tipo: Text
Palavras-chave: Campagne de chalutage; Biomasse; EVOHE; Indices d'abondance; Halieutics; Seasonal variations; Biscay bay; Trawl survey.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-2189.pdf

Indices of bluefin tuna (Thunnus thynnus thynnus) abundance derived from sale records of French purse seine catches in the Mediterranean sea
Provedor de dados: 5
Autores: Labelle, Marc; Hoch, Thierry; Liorzou, Bernard; Bigot, Jean-louis.
Sampling operations are not routinely conducted in France to monitor the landings of bluefin tuna caught by purse seiners in the Mediterranean. The length, weight and age frequencies of bluefin caught by this fleet are predicted based on sale records, length-at-age and weight-length relations, trends in fishing and natural mortality rates, and other ancillary data. The resulting length frequencies are more accurate than those predicted by Liorzou and Bigot (1992) using a simpler algorithm, and are spread more evenly across adjacent size classes. Catch-per-unil-effort (CPUE) was expressed as the numbers of age 2 bluefin caught per successful seine fishing trip in the Gulf of Lions fall fishery. CPUE indices were computed by several methods, and compared to...
Tipo: Text
Palavras-chave: Thon rouge; Senne tournante; Prises-par-unité-d'effort; Indices d'abondance; Taux de croissance; Évaluation des stocks; Mer Méditerranée; Bluefin tuna; Purse seine; Catch-per-unit-effort; Abundance indices; Growth rates; Stock-assessment; Mediterranean sea.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00188/29880/28357.pdf