Page 1


Adult Adult Adult Infant Adult Infant

Mat Pangkor

Ompung

Suci + offspring

Anak - (Marina's offspring)

Yanti + offspring

Yeni (Yanti's offspring) -

Adult

Marina + anak

Total

Adult

Infant

Irvan (Irma’s offspring)

Madeline

Adult

Irma + offspring

Adolescent

Infant

Boy - (Suci's offspring)

Kundur

Adult

Age Class

Bendot

Name

-

?

Female

?

Female

Male

Male

Female

Female

Male

Male

Female

?

Male

Sex

2

-

-

-

-

-

-

-

-

2

-

-

-

-

Jan

0

-

-

-

-

-

-

-

-

-

-

-

-

-

Feb

Table 1. Focal orangutans at Sikundur and their 2013 monthly contacts.

27

-

-

-

6

5

-

-

10

-

-

-

6

-

Mar

11

-

-

1

4

1

-

1

-

-

-

-

4

-

Apr

26

6

6

-

5

-

-

-

4

-

-

-

5

-

May

3

-

-

-

-

2

-

-

-

-

-

-

-

1

Jun

20

-

-

-

5

-

5

-

5

-

-

-

5

-

Jul

0

-

-

-

-

-

-

-

-

-

-

-

-

-

Aug

4

2

2

-

-

-

-

-

-

-

-

-

-

-

Sep

10

-

-

-

-

-

-

-

-

-

5

5

-

-

Oct

5

-

-

-

-

-

-

-

5

-

-

-

-

-

Nov

3

-

-

-

-

-

-

-

3

-

-

-

-

-

Dec

7


Orangutan Behavior at Sikundur - 2013

14

% of all 2-minute observations

100 90 80 70 60 50 Adult Female 40

Adol. Male

30

Adult Male

20 10 0 Feed

Rest

Move

Social

Other

Behavior Figure 1: A comparative look at orangutan behavior at Sikundur. The Sikundur dataset is based on 33,483 instantaneous 2-minute focal animal samples.

% of all 2-minute feeding observations

Orangutan Diet at Sikundur - 2013 100 90 80 70 60 50 Adult Female

40

Adol. Male

30

Adult Male 20 10 0

Food Resource Figure 2: A comparative look at orangutan diet at Sikundur. The Sikundur dataset is based on 10,141 instantaneous 2-minute focal animal samples.


Correlation between fruit availability & fruit consumption

A

15

0.350

Log (%fruit feeding +1)

0.300 0.250 0.200 0.150 0.100 0.050 R² = 0.5979 0.000 0.000

0.002

0.004

0.006

0.008

0.010

0.012

0.014

0.016

0.018

Log (% trees with fruits + 1)

Correlation between fruit availability & leaf consumption

B 0.140

R² = 0.6571

Log (%leaf feeding +1)

0.120 0.100 0.080 0.060 0.040 0.020 0.000 0.000

0.002

0.004

0.006

0.008

0.010

0.012

0.014

0.016

0.018

Log (% trees with fruits +1)

Correlation between fruit availability & bark consumption

C

0.140 R² = 0.4626

Log (% bark feeding +1)

0.120 0.100 0.080 0.060 0.040 0.020 0.000 0.000

0.002

0.004

0.006

0.008

0.010

0.012

0.014

0.016

0.018

Log (% trees with fruits +1)

Figure 3: Comparisons between fruit abundance and the consumption of fruits (A), leaves (B), and bark (C), the three most frequently consumed food items at Sikundur during 2013. The comparisons are based on six feeding periods.


Comparative Sumatran Orangutan Behavior

17

100 90

% of all observations

80 70 60 Batang Toru

50

Suaq Balimbing 40

Ketambe

30

Sikundur

20 10 0 Feed

Rest

Travel

Other

Behavior Figure 4: A comparative look at Sumatran orangutan behavior. The Sikundur dataset is based on 33,483 instantaneous 2-minute focal animal samples. The data for each of the other Sumatran orangutan populations comes from Wich et al. (2014).

Comparative Sumatran Orangutan Diet 100

% of feeding observations

90 80 70 60 50 Batang Toru 40

Suaq Balimbing

30

Ketambe

20

Sikundur

10 0

Food Resource Figure 5: A comparative look at Sumatran orangutan diet. The Sikundur dataset is based on 10,141 instantaneous 2-minute focal animal samples. The data for each of the other Sumatran orangutan populations comes from Wich et al. (2014).


Sikundur report 2013  
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