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Dugongs in health and disease Helene Marsh, Carole Eros, Rachel Webb James Cook University and QDPI.

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Presentation on theme: "Dugongs in health and disease Helene Marsh, Carole Eros, Rachel Webb James Cook University and QDPI."— Presentation transcript:

1 Dugongs in health and disease Helene Marsh, Carole Eros, Rachel Webb James Cook University and QDPI

2 The modern sirenia (seacows)- dugongs and manatees

3 Distribution of extant sirenia (seacows)

4 Global conservation status of modern sirenia - dugongids and manatees Antillean manatee vulnerable Amazonian manateevulnerable West African manateevulnerable Dugongvulnerable Steller’s sea cowextinct

5 Aerial survey population estimates for dugongs ? 2,000 10,000 14,000 27,000 8,000 1,600 2,400 4,000 17,000 Unknown Stable Decreasing Large-scale distribution and abundance

6

7 Trends in dugong numbers Qld Shark Control Program 19601970198019902000 0 10 20 30 40 50 Total dugongs caught per year

8 Trends in dugong numbers: Shark Control Program Sunshine Coast 19601970198019902000 Townsville Dugongs caught per month / beach

9 Change in emphasis for necropsy No longer life history What was the cause of death? Veterinary pathologists vital

10 Results of 1999 necropsy progam for Queensland Human induced Diseased Unknown

11 What can you do when asked to necropsy dead dugong? Read the manual Endeavour to determine proximate cause of death preferably in context of biology –age –diet –fat status


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