Whale sightings during POLARSTERN cruise PS125

Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly....极地海洋中鲸类分布与丰度的相关数据相当匮乏，原因在于实施标准调查方法——截线抽样调查（line-transect surveys）——既颇具挑战性，且成本高昂。