Technical guidelines for scientific surveys in the Mediterranean and the Black Sea: Procedures and sampling for demersal (bottom and beam) trawl ... fisheries and aquaculture technical papers) okumak kayıt olmadan

Technical guidelines for scientific surveys in the Mediterranean and the Black Sea: Procedures and sampling for demersal (bottom and beam) trawl ... fisheries and aquaculture technical papers)

Meslekler ve Endüstriyel Sektörler

This publication presents a methodology aimed at supporting the planning and implementation of regional demersal (bottom and beam) trawl and pelagic acoustic surveys. It can be useful for the implementation of new surveys-at-sea in areas where demersal trawl and pelagic acoustic surveys are not regularly carried out. In the Mediterranean and the Black Sea, the assessment of pelagic stocks is essentially based on acoustic surveys using acoustic techniques with mid-water trawling. These routine surveys-at-sea provide essential information, which are crucial to fine-tune the assessments of the status of resources. However, survey practices differ from one subregion to another, resulting in a lack of large-scale standardized surveys. According to the report, the methodology presented can tackle this issue by increasing comparability between existing surveys thanks to the standardization of methods, sampling of catches and data recording and analysis. Finally, it represents a valuable tool to define minimum requirements towards sustainability and management objectives at the regional and subregional level.

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31 Ağustos 2012 NAN RIEWALDT Icon Group International N&S Collection 3 Haziran 2009 29 Ağustos 2009 Aeryn Cartwright 21,6 x 0,6 x 27,9 cm 28 Şubat 2018 20,3 x 0,5 x 26 cm Kolektif 15,2 x 0,6 x 22,9 cm 20,3 x 0,3 x 26 cm 20,3 x 0,4 x 26 cm 20,3 x 0,2 x 26 cm 25 Mayıs 2010 1 Ocak 2013 Gerardus Blokdyk

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