Diet and Foraging Area of Antarctic Fur Seals at Heard Island

Antarctic Fur Seals from Heard Island fed mainly on fish, but the prey species changed both seasonally and inter-annually. The majority of prey were pelagic myctophids characteristic of deep oceanic water, and were generally taken in autumn and winter. The only other fish taken in significant numbers was Champsocephalus gunnari which was mostly taken from late winter through early autumn when it was co-dominant in the diet with the Krefftichthys anderssoni. Males and females foraged in different localities and in different parts of the water column. Males foraged mainly to the south of Heard Island in winter usually diving deep by day, feeding on scattering layers. In summer males also fed on the shelf, presumably to the north and east of Heard Island on K. anderssoni at shallow depths primarily at night. Although diet studies provided little evidence of feeding on crustaceans, diving data indicate that some males may travel to Antarctic waters in winter to feed on krill.The fields in this dataset are:MonthsSpeciesScatsTime foragingNumber of DivesTime Submerged (minutes)Mean Dive Duration (minutes)Maximum Depth (metres)

赫德岛的南极毛皮海狮（Antarctic Fur Seals）主要以鱼类为食，但猎物种类随季节和年际变化。大多数猎物为远洋灯笼鱼（pelagic myctophids），这是深海水域的典型物种，通常在秋季和冬季被捕食。唯一被大量捕食的其他鱼类是贡氏南极鱼（Champsocephalus gunnari），其主要被捕食期为晚冬至早秋，此时它与安德森氏灯笼鱼（Krefftichthys anderssoni）共同主导海狮的饮食。雄性和雌性在不同区域及水体不同层次觅食。冬季，雄性主要在赫德岛南部觅食，通常白天深潜，以散射层生物为食。夏季，雄性也会在大陆架觅食，推测是在赫德岛东北部浅水区，主要于夜间捕食安德森氏灯笼鱼。尽管食性研究几乎未发现捕食甲壳类的证据，但潜水数据表明，部分雄性可能在冬季前往南极水域捕食磷虾。该数据集包含以下字段：月份、物种、粪便样本、觅食时间、潜水次数、水下时间（分钟）、平均潜水时长（分钟）、最大深度（米）