CE0504 Celtic Explorer Blue Whiting Acoustic Survey North East Atlantic Ocean 2005

Published by: Marine Institute
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An acoustic survey targeting blue whiting (Micromesistius poutassou) spawning and post spawning aggregations in the north east Atlantic in 2005. Spawning takes place from January through to April along the shelf edge from the southern Porcupine Bank area northwards to the Faroe"Shetland Ridge including offshore areas as the Rosemary, Hatton and Rockall Banks. Peak spawning occurs between mid-March and mid April and acoustic surveys are timed to occur during this phase. The acoustic survey programme is carried out for fishery management purposes, results are presented annually at the ICES led Northern Pelagic and Blue Whiting Fisheries Working Group and from this catch advice is determined for the following year. This survey was conducted as part of a collaborative survey coordinated by the Institute of Marine Research, Bergen, Norway, using the vessel the RV “G.O. Sars”. Also participating were the RV Fridtjof Nansen” (PINRO, Russia), RV “Atlantniro” (Russia), RV “Tridens” (RIVO, Netherlands) and the RV “Magnus Heinason” (Faroes). The 2005 survey area extended from the north Porcupine shelf edge as the southern limit, west to the Rockall Bank and northerly extension reached to the Hatton Bank. The Irish component of the survey was made up of transects covering 2,228 nautical miles. To optimise the allotted time a zig-zag transect design was employed. Acoustic data were collected using the Simrad ER60 scientific echosounder. Biological sampling was done using a single pelagic midwater trawl.Fish samples were divided into species composition by weight. Species other than the blue whiting were weighed as a component of the catch. Measurements of blue whiting lengths were taken to the nearest 0.5 cm. Age, length, weight, sex, maturity and stomach fullness data were recorded for 100 blue whiting within a random 150 fish sample from each trawl haul. Visual observations for marine mammals and seabirds were also conducted on the survey. Oceanographic data on temperature, depth and salinity (CTD) were collected at set stations. 1. Collect acoustic data on blue whiting spawning aggregations s of blue whiting (Micromesistius poutassou) along the northern migration pathway 2. Collect biological samples from directed trawling on fish echotraces to determine age structure and maturity state of survey stock 3. Collect CTD data 4. Conduct visual surveys of marine mammals and seabirds

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Date released 2017-11-14
Date updated 2022-11-11
Dataset conforms to these standards See the referenced specification
Rights notes {"While every effort is made in preparing the dataset no responsibility is accepted by or on behalf of the Marine Institute for any errors, omissions or misleading information. The Marine Institute accepts no responsibility for loss or damage occasioned or claimed to have been occasioned, in part or in full, as a consequence of any person acting, or refraining from acting as a result of a matter contained in this datasets or as a consequence of using this dataset for any purpose whatsoever.","A Creative Commons (CC) license is one of several public copyright licenses that enable the free distribution of an otherwise copyrighted work. A CC license is used when an author wants to give people the right to share, use, and build upon a work that they have created. Under Creative Commons CC BY 4.0 the following is grantedRights:  Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially.The licensor cannot revoke these freedoms as long as you follow the license terms.Requirements Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",CC%20BY%204.0,CC%20BY%204.0}
Update frequency Other
Language English
Geographic coverage in GeoJSON format {"type":"Polygon","coordinates":[[[-16.6947347, 53.2012695],[-16.6947347, 59.9012858003], [-9.0241781, 59.9012858003], [-9.0241781, 53.2012695], [-16.6947347, 53.2012695]]]}
Spatial Reference Systems (SRS) WGS 84 (EPSG:3857)
Provenance information Data supplied by Marine Institute.
Period of time covered (begin) 2005-03-25
Period of time covered (end) 2005-04-14

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