Th. Chen et Ky. Lue, Food habits of the Chinese stripe-necked turtle, Ocadia sinensis, in the Keelung River, northern Taiwan, J HERPETOL, 33(3), 1999, pp. 463-471
Stomach contents from 186 Ocadia sinensis collected from the Keelung River,
northern Taiwan, between July 1995 and April 1997 were examined. Diet comp
osition varied by sex. Females shifted from an omnivorous to a herbivorous
diet as they grew, and they consumed more plant material compared to males.
Volumetrically, plant matter represented 87.7% of the total stomach conten
ts in females, whereas it only constituted 39.5% in males. Seasonal differe
nces in diets were also found. Animal matter contributed more to cool seaso
n diets. Females, especially, tended to take plants in much greater proport
ion in the warm season (94.8% in volume) compared to the cool season (50.9%
). In males, animal matter occupied 54.4% and 71.1% of the total volume of
stomach contents both in the warm and cool season, respectively. The percen
tage of empty stomachs was greater in the cool season (41.2%) than in the w
arm season (13.3%).