| dc.contributor.advisor | Mühlenberg, Michael Prof. Dr. | de |
| dc.contributor.author | Hadi, Susilo | de |
| dc.date.accessioned | 2013-01-14T15:07:24Z | de |
| dc.date.available | 2013-01-30T23:51:28Z | de |
| dc.date.issued | 2012-12-17 | de |
| dc.identifier.uri | http://hdl.handle.net/11858/00-1735-0000-000D-EF8E-1 | de |
| dc.identifier.uri | http://dx.doi.org/10.53846/goediss-1475 | |
| dc.description.abstract | Schlank- und Stummelaffen (Colobinae)
zeichnen sich durch einen spezialisierten Verdauungsapparat aus,
der wiederum eine relativ spezialisierte Nahrung bedingt. Die
dadurch entstehende Konkurrenz um geeignete Nahrung sollte daher
eher zu einer parapatrischen Verbreitung von Colobinen führen, wie
sie bei der Mehrheit der Arten dieser Gattung zu beobachten ist. Es
gibt aber auch sympatrisch vorkommende Arten unter den Schlank- und
Stummelaffen die in Afrika und Asien zu finden sind. Ein extremes
Beispiel sind die zwei Arten Presbytis potenziani und Simias
concolor, die innerhalb ihres gesamten Verbreitungsgebietes, was
lediglich ein Archipel von nur 4.000m | de |
| dc.format.mimetype | application/pdf | de |
| dc.language.iso | eng | de |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | de |
| dc.title | Niche differentiation of two sympatric colobines, Simias concolor and Presbytis potenziani on the Mentawai Island of Siberut, Indonesia | de |
| dc.type | doctoralThesis | de |
| dc.title.translated | Nischendifferenzierung zweier sympatrisch lebender Langurenarten, Simias concolor und Presbytis potenziani, auf der Mentawai Insel Siberut, Indonesien | de |
| dc.contributor.referee | Mühlenberg, Michael Prof. Dr. | de |
| dc.date.examination | 2012-08-05 | de |
| dc.subject.dnb | 500 Naturwissenschaften | de |
| dc.subject.gok | WNI 000 | de |
| dc.description.abstracteng | Colobines or leaf eating monkeys are characterized by a specialized
digestive system and hence, rather specialized dietary
requirements. Therefore, the resulting competition over suitable
food would favor a parapatric distribution of leaf eating monkeys
as observed in the majority of the species within this genus.
However, there are sympatrically living leaf-eating monkeys in
Africa as well as in Asia. An extreme example for the latter is
represented by the the two colobine monkeys Presbytis potenziani
and Simias concolor, which live sympatrically throughout their
entire distribution range, an archipelago of only 4000km2 off the
west coast of Sumatra. Within this restricted distribution, the two
poorly studied Colobine species share all types of habitats found
on these Mentawai islands.
This is the first study, which was set up to identify the
behavioral-ecological mechanisms that enable these food specialists
to coexist within an isolated and spatially restricted habitat. To
investigate the ecological niche differentiation between the two
colobines P. potenziani and S. concolor on the Mentawai islands,
the studies were focused on the characterization of their joint
habitat as well as the spatial use and diet of these species. Most
of the data presented in this thesis were collected during a long
term field study, conducted, from January 2008 to July 2009, which
included more than 4000 hours of close contact with the study
groups. These data, collected in the Peleonan forest in northern
Siberut. Results show that home ranges and canopy use of the 2
species are overlapping completely. The home range size of P.
potenziani was on average 4 times larger than that of S. concolor.
Apart from foraging and other activities, there was little
difference in overall activity budgets of the 2 species. Regarding
diet, although 60% of all food species examined were used by both
langur species, they shared only 3 of the 10 most commonly eaten
species. P. potenziani fed more selectively on fruits, whereas S.
concolor fed predominantly on leaves. Niche breadth indices
revealed that the diet of Simias concolor and Presbytis potenziani
are low. However, S. concolor seems more generalistic than that of
P. potenziani. Based on a overlapping index of 0.32, we conclude
that there is a relatively small food niche overlap between the 2
colobine species and that diet represents an important mechanism
enabling their coexistence. | de |
| dc.contributor.coReferee | Hodges, Keith J. Prof. Dr. | de |
| dc.contributor.thirdReferee | Waltert, Matthias Dr. | de |
| dc.subject.topic | Biology (incl. Psychology) | de |
| dc.subject.ger | diät | de |
| dc.subject.ger | raumnutzung | de |
| dc.subject.ger | Mentawai Inseln | de |
| dc.subject.ger | nischendifferenzierung | de |
| dc.subject.ger | Simias concolor | de |
| dc.subject.ger | Presbytis potenziani | de |
| dc.subject.eng | diet | de |
| dc.subject.eng | habitat use | de |
| dc.subject.eng | Mentawai islands | de |
| dc.subject.eng | niche separation | de |
| dc.subject.eng | Simias concolor | de |
| dc.subject.eng | Presbytis potenziani | de |
| dc.subject.bk | 42.90 | de |
| dc.identifier.urn | urn:nbn:de:gbv:7-webdoc-3842-6 | de |
| dc.identifier.purl | webdoc-3842 | de |
| dc.affiliation.institute | Biologische Fakultät | de |
| dc.identifier.ppn | 737897872 | de |