Dugong aerial survey year and month1 for the seven survey regions (Figure 1).
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Multiple surveys were conducted in the same survey year where there is more than one month identified in the same cell. No aerial surveys were conducted in 1989, 1998, 2002, 2003 and 2004.*denotes partial aerial surveys of the region.1April (Apr), September (Sep), October (Oct), November (Nov) and December (Dec).
创建时间：
2015-12-02
