Page 10 - Demo

Akamatsu et al. (2023) ingeniously use kayaks as silent, mobile platforms for passive acoustic surveys of small animals in coral reefs. Their methodology employs a rule-based detector for audio files, calculating pulse train numbers for damselfish and band energy at 8,000 Hz in rectangular meshes for snapping shrimp. Additionally, dives in coral reef areas recorded audio and images to verify damselfish species. Using GPS positions of survey trajectories, they successfully quantified and mapped the acoustic density of daselfish and snapping shrimp in coral reefs. Fang et al. (2024) analyzed nearly a decade of passive acoustic monitoring data from western Taiwan's waters, before and during offshore wind farm development. Their results reveal significant correlations in the biophony component through automated acoustic indicators, identifying increased fish calls linked to rising sea surface temperatures and new moon phases. Literature review shows dolphins' behavioral responses to vessel transits, reducing call rates and simplifying frequency patterns during ship construction. These findings underscore the importance of comprehensive underwater acoustic surveys to harmonize wind farm development with ecosystems, mitigate auditory impacts, and informregulatory and conservation efforts. These studies offer diverse perspectives on investigating ocean noise and its impact on the ocean ecology. The scientific findings and emerging trends generated from this research provide governments and organizations with valuable insights to formulate effective environmental protection strategies.Best regards,Chi-Fang Chen, Ph.DGuest Editor, Department of Engineering Science and Ocean Engineering, National Taiwan University