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Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island

机译：马里恩岛南极海狗Arctocephalus gazella的猎物

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The prey of Antarctic fur seals, Arctocephalus gazella, was investigated through scat analysis at Marion Island from 1996 until 2000. A total of 25 different prey species were identified from scats, of which 21 were fish, 1 crustacean and 3 cephalopods. Fish were by far the main prey item, occurring in 96.1% of samples, followed by crustaceans (2.7%) and cephalopods (1.2%). Fishes from the family Myctophidae (Gymnoscopelus piabilis, Electrona carlsbergi, G. fraseri and E. subaspera) were the most abundant prey (97.2%) every year, while those from the families Notothenididae, Paralepididae, Notosudidae, Microstomatidae and Gempylidae were present in small numbers. G. piabilis, E. carlsbergi, E. subaspera and G. nicholsi contributed the most in terms of biomass to the diet. Significant seasonal differences existed in the diet when comparing summer and winter. G. piabilis, K. anderssoni, P. bolini and P. choriodon dominated in summer as opposed to E. carlsbergi, E. subaspera, G. fraseri and G. nicholsi that dominated in winter. The fish varied in size and mass, from the small K. anderssoni to the large Paranotothenia magellanica. Cephalopods and the crustacean Nauticaris marionis, in very low numbers and in winter, appeared in the scats, but not in all years of study. Unidentified penguin remains rarely turned up in scats.
机译：通过对粪便的粪便分析，从1996年至2000年对南极海狗的北极海豹Arctocephalus gazella进行了调查。从粪便中共鉴定出25种不同的猎物，其中鱼类21种，甲壳类1种，头足类3种。到目前为止，鱼类是主要的猎物，占样本的96.1％，其次是甲壳类（2.7％）和头足类（1.2％）。每年，来自Myctophidae科（Gymnoscopelus piabilis，Electrona carlsbergi，G。fraseri和E.subaspera）的鱼类是最丰富的猎物（97.2％），而来自Notothenididae，Paralepididae，Notosudidae，Microstomatidae和Gempylidae的鱼类则是小型的。数字。就饮食中的生物量而言，piabilis，E。carlsbergi，E。subaspera和G. nicholsi贡献最大。比较夏季和冬季，饮食中存在明显的季节性差异。夏季以豌豆G. piabilis，安德森K. Anderssoni，博尼尼P. bolini和脉肠球菌P. choriodon为主，冬季以E. carlsbergi，E。subaspera，F。fraseri和G. nicholsi为主。鱼类的大小和质量各不相同，从小型安第斯猪笼草到大型黑粉病。头足类动物和甲壳类Nauticaris marionis数量很少，而且在冬季出现在粪便中，但并非在所有研究中都如此。身份不明的企鹅仍然很少出现在粪便中。

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