| Title |
Factors affecting reproduction in rehabilitant female orangutans: young age at first birth and short inter-birth interval
|
|---|---|
| Published in |
Primates, November 2011
|
| DOI | 10.1007/s10329-011-0285-z |
| Pubmed ID | |
| Authors |
Noko Kuze, David Dellatore, Graham L. Banes, Peter Pratje, Tomoyuki Tajima, Anne E. Russon |
| Abstract |
This study investigated the reproductive parameters of free-ranging rehabilitant female orangutans. We aimed to assess the factors that influence these parameters and provide information that could assist with the management of orangutan reintroduction programs. We analyzed the birth records of free-ranging female rehabilitants at Bukit Lawang, Bukit Tigapuluh, Sepilok, Camp Leakey, Kaja Island, Sungai Wain, and Meratus and compared them with reproductive parameters reported in wild and zoo populations. Females' ages at first birth were 10.6-14.7 years, significantly earlier than those of wild and zoo orangutans. Computed inter-birth intervals (IBIs) calculated by the Kaplan-Meier method were 65.1-90.1 months; the values for Camp Leakey and Bukit Lawang rehabilitants were significantly shorter than those reported for wild Sumatran orangutans. Infant mortality rates were 18-61%; the values for Bukit Lawang and Sepilok were significantly higher than those reported for wild Sumatran and zoo orangutans. In rehabilitants, young ages at first birth and shorter IBIs may result from the high energy intake enabled by provisioning, although the possibility exists that they reflect underestimations of age on arrival at rehabilitation centers. The observed high infant mortality rate may reflect poor mothering skills due to human rearing and/or increased disease transmission. This study demonstrates that accelerated reproductive rates (younger age at first birth and shorter IBI) are common in provisioned rehabilitant females on both Sumatra and Borneo. |
Mendeley readers
The data shown below were compiled from readership statistics for 101 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 2 | 2% |
| United Kingdom | 1 | <1% |
| Germany | 1 | <1% |
| Switzerland | 1 | <1% |
| Unknown | 96 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 25 | 25% |
| Student > Master | 14 | 14% |
| Researcher | 13 | 13% |
| Student > Bachelor | 13 | 13% |
| Student > Doctoral Student | 8 | 8% |
| Other | 18 | 18% |
| Unknown | 10 | 10% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 52 | 51% |
| Environmental Science | 9 | 9% |
| Social Sciences | 5 | 5% |
| Veterinary Science and Veterinary Medicine | 4 | 4% |
| Psychology | 4 | 4% |
| Other | 12 | 12% |
| Unknown | 15 | 15% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 March 2012.
All research outputs
#7,453,479
of 22,786,691 outputs
Outputs from Primates
#470
of 1,014 outputs
Outputs of similar age
#69,413
of 239,808 outputs
Outputs of similar age from Primates
#3
of 6 outputs
Altmetric has tracked 22,786,691 research outputs across all sources so far. This one is in the 44th percentile – i.e., 44% of other outputs scored the same or lower than it.
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We're also able to compare this research output to 6 others from the same source and published within six weeks on either side of this one. This one has scored higher than 3 of them.