Mazzoni R, Rezende C F
Universidade do Estado do Rio de Janeiro, Instituto de Biologia Roberto Alcântara Gomes/Setor de Ecologia, Rua São Francisco Xavier, 524, Maracanã, CEP 20550-013, Rio de Janeiro, RJ, Brazil.
Braz J Biol. 2003 Feb;63(1):69-74. doi: 10.1590/s1519-69842003000100009.
In the present study, we describe feeding habits of Deuterodon sp. from the Ubatiba River and explore if diet changes according to a temporal cycle of dry and wet seasons. We observed that Deuterodon sp. fed on an extremely high diversity of items ranging from organic matter, sediment (sand plus quartz parts), algae, seeds and leaves to animal organisms, such as, crustaceans, oligochaets and several life stages of terrestrial and aquatic insects, indicating an omnivorous diet. An important shift in the use of feeding resources was also registered; animal and vegetal items had alternated importance between both seasons. Allochthonous vs. autochthonous items analysis showed predominance of allochthonous items during dry season while no significant differences were registered during wet season.
在本研究中，我们描述了来自乌巴蒂巴河的德氏牙甲属物种的摄食习性，并探讨其饮食是否会根据干湿季节的时间周期而变化。我们观察到，德氏牙甲属物种的食物种类极其多样，从有机物质、沉积物（沙子和石英颗粒）、藻类、种子和树叶到动物有机体，如甲壳类动物、寡毛纲动物以及陆生和水生昆虫的几个生命阶段，表明其为杂食性饮食。在摄食资源的利用上也有一个重要转变；动物和植物性食物在两个季节的重要性交替出现。外来与本地食物分析表明，旱季外来食物占主导，而雨季未发现显著差异。
