Blar i Brage IMR på forfatter "Boyer, Helen"
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Acoustic observations of jellyfish in the Namibian Benguela
Brierley, Andrew S.; Axelsen, Bjørn Erik; Buecher, Emmanuelle; Sparks, Conrad A. J.; Boyer, Helen; Gibbons, Mark J. (Journal article; Peer reviewed, 2001-01-26)Multi-frequency acoustic data (18, 38 and 120 kHz) were collected in conjunction with pelagic trawl sampling for gelatinous macrozooplankton during a cruise to the Namibian Benguela in September 1999. Sampling focused ... -
Towards the acoustic estimation of jellyfish abundance
Brierley, Andrew S.; Boyer, D.; Axelsen, Bjørn Erik; Lynam, Christopher P.; Sparks, Conrad A. J.; Boyer, Helen; Gibbons, Mark J. (Journal article; Peer reviewed, 2005-06-23)Acoustic target strengths (TSs) of the 2 most common large medusae, Chrysaora hysoscella and Aequorea aequorea, in the northern Benguela (off Namibia) have previously been estimated (at 18, 38 and 120 kHz) from acoustic ...