瘦身海豚:身体状况不佳可以解释印度太平洋驼背海豚 (Sousa chinensis) 的人口下降吗?
Agathe Serres1, Wenzhi Lin1, Binshuai Liu2
1Marine Mammal and Marine Bioacoustics Laboratory, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China.
The Science of the total environment
|January 27, 2024
概括
桑尼亚湾和林丁湾的印度太平洋驼背海豚 (IPHD) 的身体状况较差,可能与人口减少有关. 需要进一步的研究来了解影响IPHD健康的因素,并为保护工作提供信息.
科学领域:
- 海洋哺乳动物生态学
- 保护生物学 保护生物学
- 野生动物健康评估
背景情况:
- 沿着中国海岸的印度太平洋驼背海豚 (IPHDs) 面临着人类造成的威胁和人口减少.
- 身体状况是鱼健康,生存和繁殖成功的关键指标.
- 了解IPHD身体状况变化对于评估人口健康和确定保护需求至关重要.
研究的目的:
- 为了调查下降人口中的IPHD是否表现出较差的身体状况,与那些健康的人群相比.
- 分析跨季节,地点和人口群体的IPHD身体状况的差异.
- 建立监测IPHD健康和告知保护战略的基准.
主要方法:
- 在2022年至2023年期间,无人机 (UAV) 飞行在四个关键地点进行:桑尼亚湾,莱州湾,江门和林丁湾.
- 从无人机图像中计算出身体比率 (长度和宽度),以评估海豚的身体状况.
- 主要成分分析 (PCA) 用于分析身体状况组成和位置之间的差异.
主要成果:
- 莱州湾和江门湾的海豚表现出比桑尼亚湾和林丁湾的海豚身体状况更好.
- 桑尼亚湾和林丁湾的IPHD种群正在经历显著的下降.
- 对于IPHDs,假设身体状况较差和人口状况下降之间的相关性.
结论:
- 身体状况不佳可能是导致印度太平洋驼海豚在桑尼亚湾和林丁湾严重减少的因素.
- 进一步的研究至关重要,以确定影响IPHD身体状况的特定压力因素,如猎物可用性,污染和人类活动.
- 建议为定期IPHD身体状况监测制定标准化评分方法,以指导有效的保护行动.
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