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Table 1 Survey effort (time duration, length), sighting location, sighting number and number of animals estimated in each sight between August and December 2014

From: First record of the Indo-Pacific humpback dolphins (Sousa chinensis) southwest of Hainan Island, China

Date

Time duration (hrs)

Length (km)

Sighting location

Sighting number

Number of animals sighted

Longitude

Latitude

10/08/2014

6.5

52

N/A

N/A

0

0

11/08/2014

6

41

N/A

N/A

0

0

14/08/2014

7.5

71

N/A

N/A

0

0

16/08/2014

9

79

N/A

N/A

0

0

21/09/2014

2

12

N/A

N/A

0

0

22/09/2014

6

55

N/A

N/A

0

0

24/09/2014

7.5

69

N/A

N/A

0

0

26/09/2014

8.5

76

N/A

N/A

0

0

27/09/2014

7

68

N/A

N/A

0

0

19/10/2014

6

50

N/A

N/A

0

0

20/10/2014

7.5

57

108°52.219′

18°20.194′

1

20–30

21/10/2014

7.5

55

108°55.772′

18°19.198′

1

30–40

23/10/2014

8

70

N/A

N/A

0

0

11/11/2014

5

38

109°54.720′

18°19.657′

1

8

12/11/2014

6.5

60

N/A

N/A

0

0

15/11/2014

7.5

50

N/A

N/A

0

0

16/11/2014

6

38

108°56.919′

18°21.956′

1

15–20

13/12/2014

7

60

108°56.794′

18°19.523′

1

15–20

14/12/2014

6

44

N/A

N/A

0

0

15/12/2014

8

72

N/A

N/A

0

0

18/12/2014

6

56

N/A

N/A

0

0

20/12/2014

6

45

108°54.170′

18°19.339′

1

12