Data/hora: 06/06/2024 09:42:41

Provedor de dados: 	5	
País: 	France	
Título: 	Proposals for the collection of multifrequency acoustic data	
Autores: 	Korneliussen, R; Diner, Noel; Ona, E; Berger, Laurent; Fernandes, P.	
Data: 	2008-09	
Ano: 	2008	
Palavras-chave: 	Species identification; Multifrequency acoustics; Data collection.	
Resumo: 	Acoustic surveys are used to estimate the abundance and distribution of many fish species, and have been based traditionally on data collected at a single acoustic frequency. Although it has been known for some time that the use of additional frequencies can provide information on the nature of the acoustic target, the knowledge and technology required to combine the so-called "multifrequency data" in an appropriate manner has been limited. The use of several transducers of different frequencies is now common on board research vessels and fishing vessels, so multifrequency data are often collected. In order for these data to be combined appropriately, their physical and spatial characteristics from each frequency should be as similar as possible. We detail the requirements deemed necessary to collect multifrequency data in an appropriate manner. They can be stringent and may not always be achievable, so we also consider the consequences of combining acoustic data originating in transducers with varying degrees of spatial separation and with different beam widths.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2008/publication-5286.pdf

DOI:10.1093/icesjms/fsn052	
Editor: 	Oxford university press	
Relação: 	http://archimer.ifremer.fr/doc/00000/5286/	
Formato: 	application/pdf	
Fonte: 	ICES Journal of Marine Science (1054-3139) (Oxford university press), 2008-09 , Vol. 65 , N. 6 , P. 982-994	
Fonte: 	2008 ICES/CIEM