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Tesis sobre el tema "Orangutans"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 30 de julio de 2024

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1

Citrynell, Pamela Jill. "Behaviour and cognition in captive Bornean orangutans : an ecological and comparative study of Bornean orangutan cognition in captivity." Thesis, University of Exeter, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501222.

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The study of orangutan cognition is significant to understanding the connection between human intellectual qualities and that of non-human great apes, In their isolated position as the last existing link to the Asian Hominidae lineage and the first to depart from our clade's common ancestry, orangutans may hold the key to the evolution of our own behavioural adaptations. By using a hierarchy of species appropriate Piagetian type developmental tasks supported by theories of evolutionary cognitive expansion we place orangutans in a broader phylogenetic developmental level. Each of the experiment
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2

Rafaela, Sayuri Cicalise Takeshita. "Factors regulating steroid hormones in Japanese macaques and orangutans." Kyoto University, 2018. http://hdl.handle.net/2433/232299.

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付記する学位プログラム名: 霊長類学・ワイルドライフサイエンス・リーディング大学院<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第20964号<br>理博第4416号<br>新制||理||1634(附属図書館)<br>京都大学大学院理学研究科生物科学専攻<br>(主査)准教授 Michael Alan Huffman, 准教授 足立 幾磨, 教授 友永 雅己<br>学位規則第4条第1項該当
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3

Walkup, Kristina Ralene. "Comprehension of tools by orangutans causality, tool properties, and manufacture /." [Ames, Iowa : Iowa State University], 2009.

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4

Reid, Michael John Charles. "Plasmodium sp. Infections in ex-captive bornean Orangutans (pongo pygmaeus) housed at the Orangutan Care Center and Quarantine, Pasir Panjang, Kalimantan Tengah, Indonesia /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2172.

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5

Buckley, Benjamin James William. "Ranging behaviour of male orang-utans in an unfragmented Bornean habitat and implications for mating-system mechanics." Thesis, University of Cambridge, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708701.

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6

Kim, Yena. "The origin of prosociality and fairness: Perspectives from experiments with orangutans." Kyoto University, 2017. http://hdl.handle.net/2433/227583.

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7

Phillips, Abigail Cora. "Locomotor development and gap crossing behaviour in Bornean orangutans (Pongo pygmaeus)." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3852/.

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Orangutans are the largest predominantly arboreal primate and consequently have a diverse repertoire of positional behaviour. Problems associated with travel on thin flexible supports worsen as body size increases; therefore locomotion should vary with body size. The aim of this thesis was to explore how orangutans solve problems related to life in wild and captive environments and how this changes with growth and development. A cross-sectional sample of wild orangutans (Pongo pygmaeus wurmbii) was studied at Tuanan Field Station in Central Borneo with subjects ranging from infant to adult. Re
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8

Mallavarapu, Suma. "Object permanence in orangutans, gorillas, and black-and-white ruffed lemurs." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29651.

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Thesis (Ph.D)--Psychology, Georgia Institute of Technology, 2009.<br>Committee Chair: Maple, Terry; Committee Member: Blanchard-Fields, Fredda; Committee Member: Hampton, Robert; Committee Member: Marr, Marcus; Committee Member: Stoinski, Tara. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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9

Trayford, Hannah Rose. "Continuity and change : (re)conceptualising practice in orangutan (Pongo spp.) rehabilitation and reintroduction in Indonesia." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648384.

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10

Cartmill, Erica A. "Gestural communication in orangutans (Pongo pygmaeus and Pongo abelii) : a cognitive approach /." St Andrews, 2008. http://hdl.handle.net/10023/634.

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11

Anderson, Ursula Simone. "Color, shape, and number identity-nonidentity responding and concept formation in orangutans." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42740.

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The ability to recognize sameness among objects and events is a prerequisite for abstraction and forming concepts about what one has learned; thus, identity and nonidentity learning can be considered the backbone of higher-order human cognitive abilities. Discovering identity relations between the constituent properties of objects is an important ability that often characterizes the comparisons that humans make so it is important to devote attention to understanding how nonhuman primates process and conceptualize part-identity as well as whole-identity. Because the ability to generalize the re
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12

Cartmill, Erica A. "Gestural communication in orangutans (Pongo pygmaeus and Pongo abelii) : a cognitive approach." Thesis, University of St Andrews, 2009. http://hdl.handle.net/10023/634.

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While most human language is expressed verbally, the gestures produced concurrent to speech provide additional information, help listeners interpret meaning, and provide insight into the cognitive processes of the speaker. Several theories have suggested that gesture played an important, possibly central, role in the evolution of language. Great apes have been shown to use gestures flexibly in different situations and to modify their gestures in response to changing contexts. However, it has not previously been determined whether ape gestures are defined by structural variables, carry meaning,
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13

Manduell, Kirsten L. "Habitat variation and its influence on the locomotor ecology of wild orangutans." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4700/.

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Orangutans are the largest arboreal primate and have a diverse locomotor repertoire. The principal aim of this thesis was to explore the dynamic between morphology, behaviour and habitat to better understand the influences on orangutan locomotion. Positional behaviour data was collected at two peat-swamp forest sites: Sabangau, Central Kalimantan; and Suaq Balimbing, Aceh. We quantified forest structure and support availability in the dry-lowland forest of Ketambe, Aceh, in addition to the aforementioned peat-swamp forests and found that the three forests were structurally different. We used a
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14

Voros, Joan. "Geophagy by rehabilitated orangutans (Pongo pygmaeus pygmaeus) in Sungai Wain Forest, Indonesian Borneo." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ56214.pdf.

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15

Perkins, Lorraine Allison. "An examination of the influences of the captive environment on activity in orangutans." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/29531.

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16

Kopp, Kathrin Susanne [Verfasser]. "Prosocial Behaviour in Captive Sumatran Orangutans (Pongo abelii) / Kathrin Susanne Kopp." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/112758037X/34.

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17

Madsen, Elainie Alenkær. "Attention following and nonverbal referential communication in bonobos (Pan paniscus), chimpanzees (Pan troglodytes) and orangutans (Pongo pygmaeus)." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1893.

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A central issue in the study of primate communication is the extent to which individuals adjust their behaviour to the attention and signals of others, and manipulate others’ attention to communicate about external events. I investigated whether 13 chimpanzees (Pan troglodytes spp.), 11 bonobos (Pan paniscus), and 7 orangutans (Pongo pygmaeus pygmaeus) followed conspecific attention and led others to distal locations. Individuals were presented with a novel stimulus, to test if they would lead a conspecific to detect it in two experimental conditions. In one the conspecific faced the communica
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18

Snaith, Tamaini. "The behaviour of free-ranging ex-captive orangutans in Tanjung Puting National Park, Indonesia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ47965.pdf.

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19

Singleton, Ian. "Ranging behaviour and seasonal movements of Sumatran orangutans (Pongo pygmaeus abelii) in swamp forests." Thesis, University of Kent, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327487.

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20

Claßen, Dorothee [Verfasser], Thomas [Akademischer Betreuer] Ziegler, and Ansgar [Akademischer Betreuer] Büschges. "Social relationships in captive Bornean orangutans (Pongo pygmaeus) / Dorothee Claßen. Gutachter: Thomas Ziegler ; Ansgar Büschges." Köln : Universitäts- und Stadtbibliothek Köln, 2011. http://d-nb.info/103811148X/34.

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21

Talbot, Catherine F. "Performance on a Face Discrimination Task by Orangutans Reflects a Possible Interaction between Familiarity and Novelty." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/psych_theses/92.

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Faces provide humans with information on the age, sex, individual identity, and emotional state of others. Although comparatively less is known about nonhuman primates’ face processing abilities, several gregarious group living species are able to discriminate conspecific faces. Here, we tested a less gregarious species, orangutans, to determine if they exhibit similar skills. Using a matching-to-sample paradigm, orangutans matched two identical portraits of unfamiliar orangutans. Next, subjects matched two different photographs of the same individual across viewpoints. During testing, subject
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22

Smith, Zachary Joseph. "Mapping the Spatial Movements, Behaviors, and Interactions of Captive Orangutans using Terrestrial Laser Scanning and GIS." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5312.

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Five captive Bornean orangutans (Pongo pygmaeus) were observed in order to better understand their spatial selection, behavior, and interaction with their environment and each other. A newly introduced adult male's interactions with a female group containing two adults, one adolescent, and one juvenile, was documented. Visual observations were performed to document individual behaviors, along with any interactions with silvery langur monkeys, public crowd levels, temperature, and enrichment props. Methods included 15 observation periods, 0.5-3 hours in length each, during which behaviors were
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23

Colell, Mimó Montserrat. "Lateralidad manual en chimpancés (Género "Pan") y orangutanes ("Pongo pygmaeus")." Doctoral thesis, Universitat de Barcelona, 1992. http://hdl.handle.net/10803/2718.

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El objeto de nuestra investigación ha sido el estudio de la posible lateralidad manual (grado y direccionalidad de la misma) de los sujetos de una muestra integrada por 31 chimpancés comunes ("Pan troglodytes"), 2 chimpancés pigmeos o bonobos ("Pan paniscus") y 3 orangutanes ("Pongo pygmaeus"), todos ellos en condiciones de cautividad.<br/><br/>Se ha observado a los individuos mientras llevaban a cabo la acción de recoger comida (y llevársela a la boca), considerando todos aquellos factores circunstanciales que pudieran incidir sobre la elección preferente de una u otra extremidad. Así, el tam
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24

Older, Aguilar Anastazia Magdalena. "Comparison of genomic structure and MHC specificities of killer cell immunoglobulin-like receptors in humans and orangutans /." May be available electronically:, 2009. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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25

Tingey, Leigha. "Post-occupancy Evaluation at the Zoo: Behavioral and Hormonal Indicators of Welfare in Orangutans (Pongo pygmaeus abelii)." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/901.

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An increased understanding of species-specific behavioral needs has lead zoos to focus on providing more naturalistic and stimulating environments. Scientific assessments of how changes in habitat affect animal behavior are necessary in improving overall animal welfare. This study examined the move of three orangutans housed at the Oregon Zoo into a new and innovative exhibit. Post-occupancy evaluation (POE), which offers systematic information regarding the success or failure of the built environment (Maple & Finlay, 1987), was utilized to effectively evaluate the results of the move. The col
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26

Renata, Andreia da Silva Mendonca. "Development of independence and behavior of wild immature East Bornean orangutans (Pongo pygmaeus morio), Danum Valley Conservation Area." Kyoto University, 2017. http://hdl.handle.net/2433/225987.

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27

Tajima, Tomoyuki. "Relationship between male reproductive tactics and intersexual food transfer in a free-ranging population of Bornean orangutans (Pongo pygmaeus)." Kyoto University, 2018. http://hdl.handle.net/2433/233831.

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28

O'Hara, Mackie C. "Investigating the regularity of linear enamel hypoplasia in Bornean and Sumatran orangutans and in a primate community from Sabah, Borneo." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461162720.

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29

Bentley, Ruth H. "A comparison of methods of quantifying and assessing the behaviour and welfare of Bornean orangutans (Pongo pygmaeus) : a case study at Twycross Zoo." Thesis, University of Derby, 2018. http://hdl.handle.net/10545/623076.

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The maintenance of both the psychological and physiological health of captive animals is a key priority of modern zoos. Recognising that characteristics of the captive environment have the potential to decrease animal welfare, methods for quantifying and assessing welfare have been developed as part of the process for improving animal welfare. Traditionally, observations of animal behaviour and quantifying time budgets in relation to those of the animals’ wild counterparts have been utilised to assess animal welfare. Hormonal assays have also been implemented to quantify the physiological stre
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30

Warren, Kristin Shannon. "Orang-utan conservation: epidemiological aspects of health management and population genetics." Thesis, Warren, Kristin Shannon ORCID: 0000-0002-9328-2013 (2001) Orang-utan conservation: epidemiological aspects of health management and population genetics. PhD thesis, Murdoch University, 2001. https://researchrepository.murdoch.edu.au/id/eprint/392/.

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This research addressed two important issues concerning conservation of orang-utans in Indonesia, the prevalence of diseases in orang-utans at reintroduction centres and the extent of intra-subspecific genetic variation between isolated populations of Bornean orang-utans. The research was conducted at the Wanariset Orang-utan Reintroduction Centre in East Kalirnantan fiom 1994 to 1997, during which time extensive field excursions were made throughout Borneo, and at the Biomedical Primate Research Centre in the Netherlands in 1998. Analysis of clinical records fiom 1991 to 1997 showed that d
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31

Warren, Kristin Shannon. "Orang-utan conservation : epidemiological aspects of health management and population genetics /." Warren, Kristin Shannon (2001) Orang-utan conservation: epidemiological aspects of health management and population genetics. PhD thesis, Murdoch University, 2001. http://researchrepository.murdoch.edu.au/392/.

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This research addressed two important issues concerning conservation of orang-utans in Indonesia, the prevalence of diseases in orang-utans at reintroduction centres and the extent of intra-subspecific genetic variation between isolated populations of Bornean orang-utans. The research was conducted at the Wanariset Orang-utan Reintroduction Centre in East Kalirnantan fiom 1994 to 1997, during which time extensive field excursions were made throughout Borneo, and at the Biomedical Primate Research Centre in the Netherlands in 1998. Analysis of clinical records fiom 1991 to 1997 showed that d
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32

Harrison, Mark Edward. "Orangutan feeding behaviour in Sabangau, Central Kalimantan." Thesis, University of Cambridge, 2009. https://www.repository.cam.ac.uk/handle/1810/237472.

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Detailed studies of energy/nutrient acquisition and food selection have been completed for both African apes and orangutans in mast-fruiting dipterocarp forests, but, to date, no studies of this type have been completed on orangutans in non-masting forests, which experience more muted fluctuations in fruit availability. Such studies may be instructive in understanding whether the observations on orangutans in masting habitats are specific to orangutans, or specific only to orangutans in masting habitats. To investigate this, orangutan diet composition, energy intake, food selection and behavio
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33

Carne, Charlotte Veryan. "Modelling approaches to orangutan and chimpanzee conservation." Thesis, University of Roehampton, 2014. https://pure.roehampton.ac.uk/portal/en/studentthesis/modelling-approaches-to-primate-conservation(971be913-3b24-4269-9d06-9da5963d102c).html.

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The future survival of the orangutan is extremely uncertain; as hunting and deforestation continue to exert pressure on surviving populations, new threats such as climate change and potential disease transmission are emerging that may exacerbate an already critical situation. The potential impacts of these threats were investigated in this thesis using modelling approaches, to provide insights that will be valuable for planning effective conservation strategies. Anthropogenic factors were identified as important determinants of the current range of the orangutan, while resting time also appear
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34

Parreñas, Rheana. "Arrested Autonomy: An Ethnography of Orangutan Rehabilitation." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10443.

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This dissertation is an ethnographic study about ecological displacement, affective encounters, the work of care, and human and animal subjectivities involved in rehabilitating endangered orangutans in Sarawak, Malaysia. Using participant-observation, interviews, archival research, and animal behavioral methods during seventeen months of fieldwork, this work exemplifies Donna Haraway's idea of 'zooethnography' by treating animals and humans as situated subjects. Specifically, I examine encounters between semi-wild orangutans, indigenous Sarawakian workers, Sarawakian Chinese and Malay middle-c
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35

Meyfarth, Elke Rosaleen. "Biological conservation, orangutan-rattan relationships in Indonesian Borneo." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ42577.pdf.

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36

Palmer, Alexandra. "Saving and sacrificing : ethical questions in orangutan rehabilitation." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10053367/.

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The survival of wild orangutans, our close relatives and members of the great ape family, is increasingly threatened by anthropogenic activities, such as clearcutting for oil palm. In this context, orangutan mothers are often killed, and their infants turned into pets. If lucky, traumatised and sick orphans may be rescued by conservationists, who help the infant recover and gain survival skills (known as rehabilitation) before released back into the wild (reintroduction: together, R&R). Drawing on in-depth interviews with orangutan conservation and welfare workers, and visits to the majority o
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37

Van, Casteren Adam. "The mechanical behaviour of wood in relation to orangutan locomotion and nest building." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/the-mechanical-behaviour-of-wood-in-relation-to-orangutan-locomotion-and-nest-building(f42aa1a5-3902-4912-8610-024db5967cb5).html.

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Orangutans are the only great ape to live an almost completely arboreal lifestyle, spending the majority of their time in the canopy of the tropical forest. The orangutans’ large size and habitual arboreal lifestyle means they are uniquely constrained by the mechanical properties of their canopy habitat. It is therefore necessary to have knowledge of the mechanics of trees and the wood material of which they are made in order to gain a greater understanding of orangutan ecology. This thesis begins with an investigation into the bending failure of three temperate tree species. Observations and
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38

Agnes, Maria M. "Orangutan, Pongo pygmaeus abelii, spatial memory and foraging behaviour." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22841.pdf.

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39

Hamilla, Rachel A. Hamilla. "Orangutan health and behavior: Implications for nutrition in captivity." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1524433293426808.

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40

au, K. Warren@murdoch edu, and Kristin Shannon Warren. "Orang-utan conservation : epidemiological aspects of health management and population genetics." Murdoch University, 2001. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20070824.94929.

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This research addressed two important issues concerning conservation of orang-utans in Indonesia, the prevalence of diseases in orang-utans at reintroduction centres and the extent of intra-subspecific genetic variation between isolated populations of Bornean orang-utans. The research was conducted at the Wanariset Orang-utan Reintroduction Centre in East Kalirnantan fiom 1994 to 1997, during which time extensive field excursions were made throughout Borneo, and at the Biomedical Primate Research Centre in the Netherlands in 1998. Analysis of clinical records fiom 1991 to 1997 showed that dur
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41

Parsons, Sera. "Adult male orangutan ranging behaviours in Gunung Palung National Park, West Kalimantan, Indonesia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ38546.pdf.

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42

Cassella, Christine M. "Relationships Among Captive Orangutan Diets, Undesirable Behaviors, and Activity: Implications for Health and Welfare." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333656271.

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43

Vergamini, Marie. "Managing Sociality of a Captive Female Bornean Orangutan from Breeding to Post-partum at The Smithsonian's National Zoo." VCU Scholars Compass, 2017. https://scholarscompass.vcu.edu/etd/5161.

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The Association of Zoos and Aquariums’ Orangutan Species Survival Plan® aims to maintain 100 Bornean orangutans (Pongo pygmaeus) in captivity. Because investment in breeding these lineages is high, properly managing sociality of potential mothers is essential. This study assessed how behaviors of a captive breeding female at the Smithsonian’s National Zoo changed from pre-gestation through the offspring’s sixth month of age to improve breeding recommendations. The infant Bornean orangutan was born September 2016. Results indicate that during breeding, the mother socialized most with two adult
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44

Banes, Graham L. "Genetic analysis of social structure, mate choice, and reproductive success in the endangered wild orang-utans of Tanjung Puting National Park, Central Kalimantan, Republic of Indonesia." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608063.

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45

Muir, Cedric Campbell. "The descendants of our ancestors, investigating population structure of the orangutan, Pongo pygmaeus, using DNA sequence and paleomigration modeling." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0019/NQ37735.pdf.

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46

Myatt, Julia Patricia. "Applying an ecomorphological framework to the study of orangutan positional behaviour and the morphological variation within non-human apes." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1769/.

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Establishing relationships between morphology and behaviour in response to environmental selection pressures are crucial to understand the evolution of diversity within groups such as the hominoids. Muscle architecture (fascicle length and physiological cross-sectional area) from the fore and hindlimbs in the non-human apes were compared, with the result that it did not differ substantially, likely reflecting their characteristic use of orthograde behaviours. At the micro-architecture level, significant differences in the proportions of fast and slow muscle fibres of the triceps surae were fou
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47

Bauer, Philip Agustin. "The Environmental Consequences of Deforestation in Indonesia and Malaysia for Palm Oil Plantations: A Presentation Board for the Use by Reid Park Zoo to Educate the Public on Orangutan Conservation." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/579000.

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The following thesis is a presentation board made for the use by Reid Park Zoo to educate the public on the deforestation of the rainforests of Indonesia and Malaysia for the purpose of establishing palm oil plantations, and its negative impact on the conservation of orangutans and other critically endangered species. Volunteers at the Reid Park Zoo will be able to take the display board on grounds and educate the public on ways in which they can limit their purchasing of products containing palm oil. The following text will be used as an aid to help educate the zoo's volunteers initially, and
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Ruysschaert, Denis. "Le rôle des organisations de conservation dans la construction et la mise en œuvre de l'agenda international de conservation d'espèces emblématiques : le cas des orangs-outans de Sumatra." Phd thesis, Université Toulouse le Mirail - Toulouse II, 2013. http://tel.archives-ouvertes.fr/tel-00951940.

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La thèse analyse le rôle des organisations de conservation dans la contradiction croissante entre, d'une part, la formalisation continue d'un cadre politique - juridique - institutionnel - financier - médiatique pour la conservation de l'orang-outang de Sumatra et, d'autre part, le constat avéré du déclin continu de son habitat et de ses populations. Partant du niveau global, elle se concentre ensuite dans le contexte indonésien, porteur d'un conflit aigu autour de la transformation de la forêt de basse altitude -habitat de l'orang-outan de Sumatra- en culture de palmier à huile.Le rôle des or
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Robertson, Jessie C. "Temperament assessment in rehabilitant orangutans /." 2003. http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss&rft%5Fval%5Ffmt=info:ofi/fmt:kev:mtx:dissertation&rft%5Fdat=xri:pqdiss:MQ99378.

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Thesis (M.A.)--York University, 2003. Graduate Programme in Psychology.<br>Typescript. Includes bibliographical references (leaves 64-70). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss&rft%5Fval%5Ffmt=info:ofi/fmt:kev:mtx:dissertation&rft%5Fdat=xri:pqdiss:MQ99378
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Adams, Laura C. "Social learning opportunities in orangutans /." 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR19717.

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Thesis (M.A.)--York University, 2005. Graduate Programme in Psychology.<br>Typescript. Includes bibliographical references (leaves 80-86). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR19717
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