Nicht nachhaltiges Ernten mittels Werkzeugeinsatz ist ein typisches Verhalten von Primaten- hier auch bei Thailändischen Makakenaffen:
Stone Tool Use: Monkeys overharvest shellfish
The use of stone tools by macaques in Thailand has reduced the size and population density of coastal shellfish; previously it was thought that tool-assisted overharvesting effects resulted uniquely from human activity...
Fascinatingly, Koram macaques also selected significantly smaller stones to process their (commensurately smaller) shellfish, despite the fact that small stones were relatively less abundant on this island than on NomSao. This result neatly illustrates how technological innovations can themselves be driven by overexploitation. That is, relatively high intensity foraging by tool-using macaques likely led to reductions in the average sizes of local shellfish, necessitating the use of smaller tools (which in turn could further drive down shellfish sizes, and so on). A similar feedback loop was previously proposed to drive technological innovation for human hunter-gatherers (e.g., Morgan, 2015).