Vol. 7 No.1 (2016) 5-9. and folivore needs longer feeding time. The risk of losing Two Newly Observed time when folivore fail to catch fish or vertebrate might Cases of Fish-eating in be serious for them. Examination of possible factors of fish-eating in non-human primates shed a light on this Anubis Baboons question. One of the factors is seasonality. Catching fish be- Akiko Matsumoto-Oda 1,*, Anthony D. Collins 2 comes easier during the dry season because temporary small pools or shallow rivers appear (Hamilton & Tilson, 1 Graduate School of Tourism Sciences, University of the Ryukyus, Okinawa 903-0213, Japan 1985; de Waal, 2001). Most of cases that non-human 2 The Jane Goodall Institute, Gombe Stream Research Centre, Kigoma P.O. primates obtained fishes were beside shallow water Box 185, Tanzania (Stewart, Gordon, Wich, Schroor, & Meijaard, 2008). *Author for correspondence (
[email protected]) In rehabilitant orangutans in Central Kalimantan, 79% events (19/24) were in the wet-dry transition or in the dry Most non-human primates are omnivorous and eat season, and they obtained 21% (4/19) of fsh from shallow a wide variety of food types like as fruit, leaves, ponds and 79% (15/19) on riverbanks (Russon et al., 2014). seeds, insects, gums or a mixture of these items. In Hunting frequency becomes high when low availability spite of frequent eating of fish in human, there are of preferred foods create a need for fallback foods (e.g., few species to eat fishes in non-human primates. Teleki, 1973; Rose, 2001).