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    <lastmod>2026-04-21</lastmod>
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  </url>
  <url>
    <loc>https://www.apegroup-uzh.com/research</loc>
    <changefreq>daily</changefreq>
    <priority>0.75</priority>
    <lastmod>2025-07-03</lastmod>
    <image:image>
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      <image:title>Research</image:title>
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      <image:title>Research - The Nimba Mountains</image:title>
      <image:caption>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</image:caption>
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    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1643825675807-25RBI7XDGUM3IPPHACM2/unsplash-image-rJ5vHo8gr2U.jpg</image:loc>
      <image:title>Research</image:title>
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      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/a39194e7-ca6f-41ed-b9bc-2534f274b8ef/P1090443.jpg</image:loc>
      <image:title>Research - What drives chimpanzee tool use &amp; culture?</image:title>
      <image:caption>Chimpanzees use tools in a variety of context - just like we do! Nut cracking, termite fishing and ant dipping are examples of cultural tool use variants. Yet, not all chimpanzee communities use the same types of tools. We examined the influence of environmental factors on tool use among the Seringbara chimpanzees in the Nimba Mountains, where nut cracking and termite fishing are absent, but ant dipping is present. We tested two hypotheses. The opportunity hypothesis states that encounter rates with nuts, insects or tools explain tool use patterns. The necessity hypothesis states that tool use is a response to food scarcity. Our findings supported the opportunity hypothesis: nut trees and termite mounds were rare and peripheral to the chimpanzees’ range, whereas army ants were abundant and widespread. This highlights the importance of considering environmental conditions in explaining tool use by wild chimpanzees and emphasize the interplay between environment and culture.</image:caption>
    </image:image>
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      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/e582d3e2-3fa0-43a5-b5ea-ed9e07d3519a/Bonobo_Koops2.jpg</image:loc>
      <image:title>Research - Chimpanzees and bonobos: What explains the difference in tool use?</image:title>
      <image:caption>Chimpanzees and bonobos are our closest living relatives. Whereas chimpanzees are renowned for their tool use, bonobos use few tools and none in foraging. We investigated whether extrinsic (ecological and social opportunities) or intrinsic (predispositions) differences explain this contrast by comparing chimpanzees at Kalinzu (Uganda) and bonobos at Wamba (DRC). We assessed ecological opportunities based on availability of resources requiring tool use. We also examined potential opportunities for social learning in immature apes. Lastly, we investigated predispositions for tool use by measuring object manipulation and object play. We found that extrinsic opportunities did not explain the tool use difference, whereas intrinsic predispositions did. Young chimpanzees manipulated and played more with objects than young bonobos. Our findings suggest that selection for object interest likely also played an important role in the evolution of hominin tool use.</image:caption>
    </image:image>
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      <image:title>Research - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/d5b23d0f-383f-4778-bbbc-beb5274abc67/Bossou+chimpanzee+nut+cracking+-+K.+Koops.jpg</image:loc>
      <image:title>Research - Tool use &amp; culture</image:title>
      <image:caption>We study how, and why, apes and humans develop their cultural tool use skills. We investigate the evolutionary drivers of technology, as well as the developmental process of acquiring tool use skills.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/452da2fd-40db-47d5-94e7-a00d5d6ac749/Bonobo_Koops7.jpg</image:loc>
      <image:title>Research - Behaviour &amp; ecology</image:title>
      <image:caption>We study the behaviour and ecology of wild apes. Research topics include sociality, foraging and communication. We investigate the evolutionary origins and ecological drivers of their behaviour.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/d5c61b08-3e5c-4fd2-88dc-fc1d6ad10ecf/Seringbara+chimpanzee+3+-+K.+Koops.jpg</image:loc>
      <image:title>Research - Research &amp; conservation</image:title>
      <image:caption>We investigate how wild chimpanzees utilize their environment. We employ genetic censusing, habit suitability modeling, and camera trapping. Our research helps to inform conservation strategies.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/40d9fd00-ed1e-4ba8-89b2-4bc77ec281cc/SNF_logo_standard_office_color_pos_e.png</image:loc>
      <image:title>Research - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
    </image:image>
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      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/e6cc7b5c-e017-42c2-8668-8db174456d76/Bonobo_Koops1.JPG</image:loc>
      <image:title>Research</image:title>
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      <image:title>Research - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
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  </url>
  <url>
    <loc>https://www.apegroup-uzh.com/publications</loc>
    <changefreq>daily</changefreq>
    <priority>0.75</priority>
    <lastmod>2026-04-16</lastmod>
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  <url>
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    <priority>1.0</priority>
    <lastmod>2024-02-14</lastmod>
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      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
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      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
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      <image:caption>Dr Jake Funkhouser joins the APE Group as a postdoctoral researcher.</image:caption>
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      <image:caption>An adult male chimpanzee in Bossou (Guinea) cracking oil palm nuts using a stone hammer and anvil . Photo credit: Dr. Kathelijne Koops</image:caption>
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      <image:caption>I am a Ph.D. student in the Comparative Human and Ape Technology (CHAT) Project and my research focusses on cross-cultural and cross-species comparisons of tool use development in human children and chimpanzees.</image:caption>
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    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1656325487611-09ZAX55HZ74NUFJ3C2TB/SANZ_Goualougo_Congo.jpg</image:loc>
      <image:title>Our team gallery - Prof. Crickette Sanz</image:title>
      <image:caption>I am a Professor of Anthropology at Washington University in St. Louis and a conservation scientist affiliated with the Congo Program of the Wildlife Conservation Society. As co-PI of the Goualougo Triangle Ape Project in northern Republic of Congo, Dr. Morgan and I oversee research at the Goualougo and Mondika field sites. We work together with Dr. Koops on the Comparative Human and Ape Technology (CHAT) Project.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1694177533486-NAVTNONM8PLTF57RF9HI/image.jpg</image:loc>
      <image:title>Our team gallery - Dr. Sarah Pope-Caldwell</image:title>
      <image:caption>I am an Assistant Professor at Georgia State University. I oversee cross-cultural and developmental psychology research at the Likouala field site in the Republic of the Congo. I work together with Dr. Koops on the Comparative Human and Ape Technology (CHAT) Project.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1676747323580-WE39F42KV4XF7N0B5H2V/image-asset.jpeg</image:loc>
      <image:title>Our team gallery - Dr. Laura van Holstein</image:title>
      <image:caption>I am an Assistant Professor at Emory University. Together with Dr. Koops, I study crab-fishing by the chimpanzees in the Nimba Mountains in Guinea.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677420866982-408SMNSFTQ3V3IFFBMYQ/Henry.jpg</image:loc>
      <image:title>Our team gallery - Henry Didier Camara</image:title>
      <image:caption>I am a Guinean primatologist and research team lead in the Nimba Chimpanzee Project. I completed my B.Sc. in Natural Resource Management in 2020 at UDECOM (Guinea). I have been part of the Nimba Chimpanzee Project since 2005.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677420984134-C3WUFJUCHZDZXQ4YAYYE/Gnan.jpg</image:loc>
      <image:title>Our team gallery - Gnan Mamy</image:title>
      <image:caption>I am a Guinean primatologist and research team lead in the Nimba Chimpanzee Project. I completed my M.Sc. in Conservation and Biodiversity Development in 2020 and my B.Sc. in Natural Resource Management in 2012, both at the University of N’Zérékoré (Guinea). I have been part of the Nimba Chimpanzee Project since 2014.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1678799055373-VXTVCCKF0X61YCJSNB93/6828CBCE-1412-490C-BBE5-5188C497D5F4_1_105_c.jpg</image:loc>
      <image:title>Our team gallery - Kui Gbouomy</image:title>
      <image:caption>I am a research team lead in the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2021.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1744296472436-6Q2J4IBGJ6VX5U2MLC84/Marcel%2B2025.jpg</image:loc>
      <image:title>Our team gallery - Marcel Saoromy</image:title>
      <image:caption>I am an assistant research team lead in the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2024.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1744296730808-OX2YVFH07DMGX5PJUW7J/Blaise%2B2025.jpg</image:loc>
      <image:title>Our team gallery - Blaise Gbouomy</image:title>
      <image:caption>I am an assistant research team lead in the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2024.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1756730708168-VPR991587OZBDKYAVR5W/Lakpo%2B2025.jpg</image:loc>
      <image:title>Our team gallery - Lakpo Souomy</image:title>
      <image:caption>I am an assistant research team lead in the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2024.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677422498692-DOCDUS6QR6QEDFNXBA1S/Fokaye.jpg</image:loc>
      <image:title>Our team gallery - Fokeye Zogbila</image:title>
      <image:caption>I am the first guide of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2003.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677422733801-C2MSVBCE8KT0UTH2AJ2N/Yon.jpg</image:loc>
      <image:title>Our team gallery - Yon Zogbila</image:title>
      <image:caption>I am a guide of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2011.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677422705948-D18KBT69NC34LZGOAJML/Doro.jpg</image:loc>
      <image:title>Our team gallery - Doro Zogbila</image:title>
      <image:caption>I am a guide of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2011.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677422746018-BEZYPOWDTWONCME5TCS6/Ce.jpg</image:loc>
      <image:title>Our team gallery - Cé Samy</image:title>
      <image:caption>I am a guide of the Nimba Chimpanzee Project. I am from the village of Nyon and I have been part of the Nimba Chimpanzee Project since 2011.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1677422759668-Q31O2H7SPGPVIVHL20WG/Nema.jpg</image:loc>
      <image:title>Our team gallery - Nema Guêmy</image:title>
      <image:caption>I am a guardian of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2011.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1744296920278-OPH8DDN5C5FIFHT1XSC1/Yon.jpg</image:loc>
      <image:title>Our team gallery - Nawa Gbouomy</image:title>
      <image:caption>I am the lead cook of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2011.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1744296864847-RCPNS3HLLA5GOZTLXYRX/4AA8042B-4539-45FA-80F7-BC16BDD50874_1_105_c.jpg</image:loc>
      <image:title>Our team gallery - Ellie Zogbila</image:title>
      <image:caption>I am the second cook of the Nimba Chimpanzee Project. I am from the village of Seringbara and I have been part of the Nimba Chimpanzee Project since 2021.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1718789265481-ZXJ3JCT0DJIAOZV6I2BW/Julia_Mokele_GD.jpg</image:loc>
      <image:title>Our team gallery - Dr. Julia Kunz</image:title>
      <image:caption>I am a post-doctoral researcher in the APE Group, as part of a SNSF Mobility grant to work on sexual coercion in primate societies.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1736506863305-44XG6LLUAQKCXBO8OES0/Gaia_Photo.jpg</image:loc>
      <image:title>Our team gallery - Gaia Zorzi</image:title>
      <image:caption>I am a M.Sc. student in the Comparative Human and Ape Technology (CHAT) Project and my research focusses on the development of object manipulation in wild and captive bonobos.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1745416500831-05Y7QI7TG0Y09B5D1UIG/Siana%252Bwebsite.jpg</image:loc>
      <image:title>Our team gallery - Siana Senn</image:title>
      <image:caption>I am a M.Sc. student in the Ape Behaviour &amp; Ecology Group. My research focusses on buttress drumming by the chimpanzees in the Nimba Mountains in Guinea.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1754649946989-03VGKM818GF2B5ZMIZ12/Peter_DPZ_4550.jpg</image:loc>
      <image:title>Our team gallery - Dr. Hella Péter</image:title>
      <image:caption>I am the Nimba Chimpanzee Project video data base manager. I primarily work with the long-term chimpanzee and biodiversity camera trap data from the Nimba Mountains in Guinea.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1754653281861-Z16ZAGDE5TKK0QYYVRU3/Maegan+Fitzgerald_APE+Group.jpg</image:loc>
      <image:title>Our team gallery - Dr. Maegan Fitzgerald</image:title>
      <image:caption>I am a conservation biologist at Re:wild and a research associate in the APE Group. Together with Prof. Koops I co-direct the Nimba Chimpanzee Project in Guinea.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1772791098268-TN4O2CFSZYK3GZ8GWIK3/AF40700F-D8BC-4769-97EF-0EBA234C0D80_1_105_c.jpg</image:loc>
      <image:title>Our team gallery - Zora van der Bie</image:title>
      <image:caption>I am a research assistant working within the Nimba Chimpanzee Project in Guinea.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1772796805076-JL15UNEYMVVCKBGMM1QY/R003_20.jpg</image:loc>
      <image:title>Our team gallery - Shana Koller</image:title>
      <image:caption>I am a research assistant working within the Comparative Human and Ape Technology (CHAT) Project. I will start my M.Sc. in the APE Group in the fall of 2026.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1776091726830-QEZRGIOP6A9CNWK6GJYM/4d971a7c-4a2d-4df4-928f-1897462e098b.png</image:loc>
      <image:title>Our team gallery - Nicole Scholte Lubberink</image:title>
      <image:caption>I am a Ph.D. student in the Creative Ape Project, which investigates the evolutionary foundations of creativity in chimpanzees and bonobos.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1776094527554-Z4LGVLIAIK8BK3N170IX/csm_2023_Blanca_Striegler_ChristianH%25C3%25BCller_01_724cc38801.jpg</image:loc>
      <image:title>Our team gallery - Blanca Striegler</image:title>
      <image:caption>I am a Ph.D. student in the Creative Ape Project, which investigates the evolutionary foundations of creativity in chimpanzees and bonobos.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/61d606316b15d520d1986418/1778836034971-RY84FIIO0TZVO7SSCUW4/cat.jpg</image:loc>
      <image:title>Our team gallery - Prof. Cat Hobaiter</image:title>
      <image:caption>I am a Professor in the School of Psychology at the University of St Andrews. I co-direct the Bugoma Chimpanzee Project and the Moyen-Bafing Chimpanzee Project and I work together with Dr. Koops on the Creative Ape Project.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.apegroup-uzh.com/past-lab-members</loc>
    <changefreq>daily</changefreq>
    <priority>0.75</priority>
    <lastmod>2025-08-18</lastmod>
  </url>
</urlset>

