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- W767808747 abstract "Dugongs are distributed through the tropics and subtropics from east Africa to Vanuatu (Marsh et al. 2011). They prefer shallow (<10 m) protected inshore areas where their food source (seagrass) is abundant. The Cocos (Keeling) Islands (12°12′S, 96°54′E) are an oceanic coral atoll in the Indian Ocean and not typical habitat of dugongs. In June 2002, a solitary male dugong (2 m in length) colonised the Cocos Islands having travelled more than 1000 km through oceanic waters greater than 5000 m deep (Hobbs et al. 2007). This remarkable colonisation event is well beyond the known geographic range of the species (Marsh et al. 2011). Here, we describe the dugong’s unusual behavior and habitat use based on our underwater observations from 2002 to 2014. Dugongs tend not to interact with humans; however, the Cocos dugong regularly approaches divers and snorkelers, coming within 0.5 m (Hobbs et al. 2007, Fig. 1a). These interactions are commonly 5 to 20 mins duration (Hobbs et al. 2007), but can last up to an hour. The dugong’s unusual behavior includes approaching divers face-to-face, vertical orientation facing divers, circling divers, and using its forelimbs to spin around the anchor line (Fig. 1b). Human interactions have also been observed for a solitary dugong in Vanuatu (Adam 1998). The Cocos dugong occasionally lies on its side motionless on the sand. Vocalisations of the dugong can be heard throughout the dive (Hobbs et al. 2007). The dugong chases large animals, including turtles, dolphins, and manta rays, and is found with batfish and unicornfish (Fig. 1a, c). A lack of conspecifics may explain why the dugong interacts with humans and large marine fauna." @default.
- W767808747 created "2016-06-24" @default.
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- W767808747 date "2015-07-02" @default.
- W767808747 modified "2023-09-26" @default.
- W767808747 title "Unusual behavior and habitat use of a solitary male dugong inhabiting coral reefs at the Cocos (Keeling) Islands" @default.
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- W767808747 doi "https://doi.org/10.1007/s12526-015-0360-6" @default.
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