First ecological study of the Bawean warty pig (Sus blouchi), one of the rarest pigs on earth

Rademaker, Mark, Meijaard, Erik, Semiadi, Gono, Blokland, Simen, Neilson, Eric W. and Rode-Margono, Eva Johanna (2016) First ecological study of the Bawean warty pig (Sus blouchi), one of the rarest pigs on earth. PLoS ONE, 11 4: . doi:10.1371/journal.pone.0151732


Author Rademaker, Mark
Meijaard, Erik
Semiadi, Gono
Blokland, Simen
Neilson, Eric W.
Rode-Margono, Eva Johanna
Title First ecological study of the Bawean warty pig (Sus blouchi), one of the rarest pigs on earth
Formatted title
First ecological study of the Bawean warty pig (Sus blouchi), one of the rarest pigs on earth
Journal name PLoS ONE   Check publisher's open access policy
ISSN 1932-6203
Publication date 2016-04-06
Sub-type Article (original research)
DOI 10.1371/journal.pone.0151732
Open Access Status DOI
Volume 11
Issue 4
Total pages 15
Place of publication San Francisco, United States
Publisher Public Library of Science
Collection year 2017
Language eng
Formatted abstract
The Bawean warty pig (Sus blouchi) is an endemic pig species confined to the 192 km2 large island of Bawean in the Java Sea, Indonesia. Due to a lack of quantitative ecological research, understanding of natural history and conservation requirements have so far been based solely on anecdotal information from interviews with local people and study of captive and museum specimens. In this study we provide the first assessment of population and habitat preferences for S. blouchi by using camera trapping. From the 4th of November 2014 to January 8th 2015, we placed camera traps at 100 locations in the forested protected areas on Bawean. In 690.31 camera days (16567.45 hours) we captured 92 independent videos showing S. blouchi. Variation in S. blouchi trapping rates with cumulative trap effort stabilized after 500 camera days. An important outcome is that, in contrast to the suggestion of previous assessments, only S. blouchi was detected and no S. scrofa was found, which excludes hybridization threats. We fitted a Random Encounter Model, which does not require the identification of individual animals, to our camera-trapping data and estimated 172–377 individuals to be present on the island. Activity patterns and habitat data indicate that S. blouchi is mainly nocturnal and prefers community forests and areas near forest borders. Next to this, we found a positive relationship between S. blouchi occupancy, distance to nearest border, litter depth and tree density in the highest ranking occupancy models. Although these relationships proved non-significant based on model averaging, their presence in the top ranking models suggests that these covariables do play a role in predicting S. blouchi occurrence on Bawean. The estimated amount of sites occupied reached 58%. Based on our results, especially the estimation of the population size and area of occupancy, we determine that the species is Endangered according to the IUCN/SSC Red List criteria.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: CEED Publications
HERDC Pre-Audit
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Tue, 26 Apr 2016, 00:41:59 EST by System User on behalf of Learning and Research Services (UQ Library)