Seasonal occurrence, diel‐vocalizing patterns, and call‐types of Antarctic minke whales are described using bio‐acoustic recordings from the west coast of South Africa and the Maud Rise, Antarctica. In Antarctica, minke whale bioduck calls were detected in seven of nine months of hydrophone deployment (peaking in May and September) while downsweeps were only detected in June. Bioduck calls were sporadically detected in South African waters with peak calling in September/October, and no bioducks were detected from March through August. Bioduck call occurrence was high during daytime in Antarctica but there was no diel‐vocalizing pattern in South African waters. We split bioduck B call‐type into two subtypes: B1 with 13 ± 1 pulses (Dominello & Širović, 2016) and B2 with 9 ± 1 pulses (this study). Bioduck B2 was detected both in Antarctic and South African waters, with harmonics up to 2 kHz. Similar bioduck call‐types were detected in Antarctic and South African waters, with bioduck A2 being the most common. Month of the year was the most important predictor of bioduck occurrence both in Antarctic and South African waters. This is the first study to describe the seasonal occurrence, diel‐vocalizing behavior and call‐types of Antarctic minke whales off the South African west coast and eastern Weddell Sea.

中文翻译：

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南非西海岸和南极莫德高地的南极小须鲸的季节性声学事件，发声方式和生物鸭呼唤型成分

利用南非西海岸和南极莫德高地的生物声记录描述了南极小须鲸的季节性发生，发声方式和叫声类型。在南极洲，部署水听器的9个月中有7个月（在5月和9月达到峰值）检测到小须鲸生物鸭叫声，而仅在6月才发现下垂声。在南非水域偶发地发现了生物鸭，在9月/ 10月达到高峰。在3月至8月，没有发现生物鸭。在南极洲，白天的鸭呼叫发生率很高，但在南非水域却没有发声的声音。我们将bio鸭B的呼叫类型分为两个亚型：具有13±1个脉冲的B1（Dominello＆Širović，2016）和具有9±1个脉冲的B2（本研究）。在南极和南非水域中都检测到了Bioduck B2，谐波高达2 kHz。在南极和南非水域中也发现了类似的生物鸭叫水类型，其中最常见的是生物鸭A2。在南极和南非水域中，一年中的月份是最重要的预测生物鸭子发生的指标。这是描述南非西南海岸和韦德海东部沿海南极小须鲸的季节性发生，发声行为和呼唤类型的第一项研究。