Diversity of fish sound types in the Pearl River Estuary, China

作者：Zhitao Wang, Douglas P. Nowacek, Tomonari Akamatsu, Kexiong Wang, Jianchang Liu, Guo-Qin Duan, Han-Jiang Cao, Ding Wang · 年份：2017 · DOI：10.7287/peerj.preprints.3301v1 · 被引用次数：1 · 研究领域：Marine animal studies overview、Underwater Acoustics Research、Ichthyology and Marine Biology

Background. Repetitive species-specific sound enables the identification of the presence and behavior of soniferous species by acoustic means. Passive acoustic monitoring has been widely applied to monitor the spatial and temporal occurrence and behavior of calling species. Methods. Underwater biological sounds in the Pearl River Estuary, China, were collected using passive acoustic monitoring, with special attention paid to fish sounds. A total of 1408 suspected fish calls comprising 18,942 pulses were qualitatively analyzed using a customized acoustic analysis routine. Results. We identified a diversity of 66 types of fish sounds. In addition to single pulse, the sounds tended to have a pulse train structure. The pulses were characterized by an approximate 8 ms duration, with a peak frequency from 500 to 2600 Hz and a majority of the energy below 4000 Hz. The median inter-pulsepeak interval (IPPI) of most call types was 9 or 10 ms. Most call types with median IPPIs of 9 ms and 10 ms were observed at times that were exclusive from each other, suggesting that they might be produced by different species. According to the literature, the two section signal types of 1+1 and 1+N 10 might belong to big-snout croaker ( Johnius macrorhynus ), and 1+N 19 might be produced by Belanger's croaker ( J. belangerii ). Discussion. Categorization of the baseline ambient biological sound is an important first step in mapping the spatial and temporal patterns of soniferous fishes. The next ste...