Acoustic Characterization for the Feeding Activities of Haliotis discus Hannai

In order to analyze the sound production mechanism and acoustic characteristics of Haliotis discus hannai during feeding, this paper proposes a multi-source information fusion approach combining passive acoustics with videos. experiments, abalones shell length 60 ± 2.7 mm were divided into two groups: Group A was fed fresh macro algae Gracilaria lemaneiformis as food once each day; B placed on small amount sand impurities at bottom tank. As control groups, C did not have abalone or D but added. The eating signals mainly concentrated in frequency range between 9.49 kHz 44.36 kHz, wherein peak is 37.86 2.55 maximum energy -66.43 5.17 dBm/Hz. Each pulse sequence duration 119.12 70.51 ms consists several sub-pulses. Nearly 70% sequences consist 1~2 sub-pulses containing one sub-pulse 42.62 19.72 ms. rate kept 0.61 0.04 times/min beginning decreased significantly 0.48 0.08 after mins. Note that characteristic analysis feeding are first reported manuscript best our knowledge, also demonstrates produced by scraping grinding radula. Because decreases reduction abalone’s level hunger, results may be used an indicator strategy for aquaculture industry.