Applying the European hydroacoustic standard on fish abundance estimation (EN 15910) Survey experiences from three European countries
2016
Axenrot, Thomas | Guillard, Jean | Riha, Milan | Tušer, Michal | Sandin, Leonard | Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) ; Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])
Hydroacoustics is an internationally approved method to study fish for abundance estimatesand behaviour to increase our understanding of aquatic ecosystems. In Europe and North-America, the need to compare results between years, lakes and countries has been recognizedand as a consequence of this, acoustic methods are being standardized. To study how theEuropean standard Water quality – Guidance on the estimation of fish abundance with mobilehydroacoustic methods (CEN 2014) was perceived by different users, a joint evaluationof the implementation of the standard was performed in 2014 by hydroacoustic experts fromthree European countries. In some parts of the standard the participants´ actions were differentfrom what was described by the standard, and in some cases methods differed among theparticipants. A general explanation for most of these cases was that stable equipment performanceand experience from discrete surveys reduce the need of controlling actions. Wesuggest that the results of this study should be considered at the revision of the standard (EN15910) scheduled for 2017.
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