Chimpanzees routinely fish for algae with tools during the dry season in Bakoun, Guinea

@article{Boesch2017ChimpanzeesRF,
  title={Chimpanzees routinely fish for algae with tools during the dry season in Bakoun, Guinea},
  author={Christophe Boesch and Ammie K. Kalan and Anthony Agbor and Mimi Arandjelovic and Paula Dieguez and Vincent Lapeyre and Hjalmar S. K{\"u}hl},
  journal={American Journal of Primatology},
  year={2017},
  volume={79}
}
Wild chimpanzees regularly use tools, made from sticks, leaves, or stone, to find flexible solutions to the ecological challenges of their environment. Nevertheless, some studies suggest strong limitations in the tool‐using capabilities of chimpanzees. In this context, we present the discovery of a newly observed tool‐use behavior in a population of chimpanzees (Pan troglodytes verus) living in the Bakoun Classified Forest, Guinea, where a temporary research site was established for 15 months… 
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References

SHOWING 1-10 OF 36 REFERENCES
Algae Scooping Remains a Puzzle
Algae scooping is a tool-use signature marker of the Bossou chimpanzee community, as it is unique to this community and has never been observed at any other chimpanzee field site in Africa. Bossou
Chimpanzee (Pan troglodytes verus) Behavioral Responses to Stresses Associated With Living in a Savanna-Mosaic Environment: Implications for Hominin Adaptations to Open Habitats
Anthropologists have long been interested in the behavioral ecology of nonhuman primates living in savannas given what we know of early hominin environments. As expected, chimpanzees in the Fongoli
In search of the last common ancestor: new findings on wild chimpanzees
  • W. McGrew
  • Biology
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2010
TLDR
Recent findings from nature are reviewed, focusing on those with direct implications for hominin evolution, e.g. apes, using elementary technology to access basic resources such as food and water, or sheltering in caves or bathing as thermoregulatory adaptations.
Chimpanzee accumulative stone throwing
TLDR
The ritualized behavioural display and collection of artefacts at particular locations observed in chimpanzee accumulative stone throwing may have implications for the inferences that can be drawn from archaeological stone assemblages and the origins of ritual sites.
Feeding ecology of western lowland gorillas in the Nouabalé-Ndoki National Park, Congo
The feeding ecology of western lowland gorillas (Gorilla gorilla gorilla) living in the Nouabalé-Ndoki National Park, northern Congo, was surveyed for one full year. This is the first record to make
The Tool Repertoire of Bossou Chimpanzees
TLDR
This chapter aims to present globally the Diversity of tool-use behaviors of the Bossou chimpanzees, highlighting their age-class, sex, and temporal distribution, the diversity of domains in which they are observed, and patterns of hand use during tool manipulation.
Cultures in chimpanzees
TLDR
It is found that 39 different behaviour patterns, including tool usage, grooming and courtship behaviours, are customary or habitual in some communities but are absent in others where ecological explanations have been discounted.
Shallow-water habitats as sources of fallback foods for hominins.
TLDR
This study differs from traditional savanna chimpanzee models of hominin origins by proposing that access to aquatic habitats was a necessary condition for adaptation to savanna habitats, and raising the possibility that harvesting efficiency in shallow water promoted adaptations for habitual bipedality in early hominins.
The conditions for tool use in primates: implications for the evolution of material culture.
TLDR
It is concluded that strong mutual tolerance was a key factor in the explosive increase in technology among hominids, probably intricately tied to a lifestyle involving food sharing and tool-based processing or the acquisition of large, shareable food packages.
...
...