Whale sightings during POLARSTERN cruise PS134

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，这是因为实施标准调查方法——线样调查法（line-transect surveys）——不仅难度颇高，且成本高昂。