East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; College of Marine Sciences of Shanghai Ocean University, Shanghai 201306, China.
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; Key Laboratory of East China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, Shanghai 200090, China.
Mar Pollut Bull. 2024 Sep;206:116789. doi: 10.1016/j.marpolbul.2024.116789. Epub 2024 Aug 1.
This study thoroughly examines three cetacean monitoring methods and assessing their advantages and limitations, establishing a foundational basis for comprehensive information on composition, distribution, and behavior. While real-time and non-invasive, visual surveys favor surface-active cetaceans and are weather-dependent. Local ecological knowledge supplements insights into group behavior. Environmental DNA (eDNA) analysis efficiently detects species like the narrow-ridged finless porpoise (Neophocaena asiaeorientalis) and common bottlenose dolphin (Tursiops truncatus), offering non-invasive, and spatially adept monitoring. Furthermore, eDNA provides prey species information, revealing the narrow-ridged finless porpoise's winter migration to deeper waters due to prey distribution. The study identifies prevalent prey species, like the Japanese Anchovy (Engraulis japonicus) and Osbeck's grenadier anchovy (Coilia mystus), offering insights into the porpoise's feeding ecology and adaptation to changing prey availability in winter. This study systematically compares diverse methodologies employed in cetacean surveys, thereby yielding a comprehensive understanding of cetacean distribution, behavior, and feeding ecology.
本研究彻底考察了三种鲸目动物监测方法，并评估了它们的优点和局限性，为全面了解组成、分布和行为奠定了基础。虽然实时和非侵入性的视觉调查有利于表面活动的鲸目动物，但它们依赖天气。当地的生态知识补充了对群体行为的了解。环境 DNA（eDNA）分析有效地检测到窄脊江豚（Neophocaena asiaeorientalis）和宽吻海豚（Tursiops truncatus）等物种，提供非侵入性和空间适应性监测。此外，eDNA 提供了猎物物种的信息，揭示了由于猎物分布，窄脊江豚在冬季向更深水域的迁徙。该研究确定了普遍存在的猎物物种，如日本沙丁鱼（Engraulis japonicus）和Osbeck's 长颌鲚（Coilia mystus），为江豚的摄食生态和适应冬季猎物可利用性变化提供了深入了解。本研究系统比较了鲸目动物调查中使用的多种方法，从而全面了解了鲸目动物的分布、行为和摄食生态。
