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Intra-Specific Communication of Andean Bears in the Peruvian
Transcript of Intra-Specific Communication of Andean Bears in the Peruvian
Intra-specific communications of Andean bears
This study investigated field signs of Andean bear in the Peruvian Dry forest to gain an insight into the intra-specific communication of bears living in this unique and highly threatened habitat.
There will be a significant correlation between the height and the circumference of the rub post.
There will be a significant correlation between the height of the rub and height of plant chosen to rub on.
There will be a significant correlation between the frequency of bear signs and their distance to water holes.
30 day session in the dry forest.
57.6 km of bear trail were surveyed for field signs.
A total of 2 scratch marked trees, 18 rub posts and 7 sunken footprints were found.
The location, characteristics, size and other parameters surrounding these marks were recorded.
Bears of the Peruvian dry forest were found to rub at heights of <107cm, on small shrub species such as Lucraco (Waltheria ovata) and Cerezo (Muntingia calabura)
The low height of rub posts used by bears in this study could be due to a lack of diversity in the tree species found.
The scatter plot, shows that bears of the study sight preferred to rub at a height of <170cm. There was a positive correlation between the height of the rub and the shrub chosen by the bear (Anova-test P= 0.00327).
There was a positive correlation between the bear rub and the circumference of the shrub (Correl-test P= 0.695157581).
As seen in both images (left and below), the highest number of marks were found close to water.
Marking trees, selection of species and their location are crucial to the bears’ communication system and their survival.
The loss or endangerment of these plants, trees or shrub species could impede their ability to effectively communicate making it difficult to find other con-specifics during the breeding season.
This study presents the first insight into how bears of the Peruvian dry forest interact with each other and could assist in future study and conservation of this species
Clapham, M, Nevin T. O, Ramsey D. T, Rosell F,. (2012). A Hypothetico-Deductive Approach to Assessing the Social Function of Chemical Signalling in a Non-Territorial Solitary Carnivore. Plosone . 7 (4),p1-9.
Goldstein, I., Velez-Liendo, X., Paisley, S. & Garshelis, D.L. 2008. Tremarctos ornatus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 21 February 2012.
The climate in the dry forest is extreme with temperatures in low elevations averaging 30o C and highs reaching above 40 o C. Marking on substrate close to the ground could be a more energy efficient way for the bears to communicate their presence.
The highest number of marks were found less than 10 meters from water. These sites are a limited resource and frequently used by bears. Marking close would optimize their probability of detection and intra-specific communication.
Jack Kleiner, Norwegian University of Life Sciences. Email firstname.lastname@example.org
Robyn Appleton, Spectacled bear Conservation Society Peru. Email email@example.com