Sabagh L T, Ferreira V L, Rocha C F D
Departamento de Ecologia, Universidade do Estado do Rio de Janeiro, RJ, Brasil.
Braz J Biol. 2010 Nov;70(4):955-9. doi: 10.1590/s1519-69842010000500006.
We studied the feeding ecology of two Hylinae anurans (Hypsiboas raniceps and Scinax acuminatus), living sympatrically and syntopically in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil. The two hylid species had similar relative mouth width but differed in body size. The diet of the two frog species were composed of arthropodan prey. Both species consumed 11 different prey types, of which seven were common among them. Hypsiboas raniceps had a larger niche breadth (B(A) = 0.64) than S. acuminatus (B(A) = 0.48). Trophic niche overlap among frog species was 60.7 %. Our data are suggestive that although for many anurans the diet simply tend to reflect prey availability in the microhabitat, these two frog species, despite sharing similar microhabitat and period of activity (thus potentially exposed to a similar array of preys), tends to differ somewhat in diet (about 40%) which may result from some intrinsic ecological aspects to each of them (e.g. ecophysiology) and/or differences in body size.
我们研究了两种雨蛙科无尾目动物（黑头雨蛙和尖吻琴蛙）的食性生态，它们在巴西南马托格罗索州米兰达潘塔纳尔湿地同域且同地生活。这两种雨蛙科物种的相对口宽相似，但体型不同。这两种蛙类的食物均由节肢动物猎物组成。两种物种都捕食11种不同的猎物类型，其中7种是它们共有的。黑头雨蛙的生态位宽度（B(A)=0.64）比尖吻琴蛙（B(A)=0.48）更大。蛙类物种之间的营养生态位重叠为60.7%。我们的数据表明，尽管对于许多无尾目动物来说，其饮食往往只是反映微生境中的猎物可获得性，但这两种蛙类，尽管共享相似的微生境和活动时期（因此可能接触到相似的猎物种类），在饮食上仍存在一定差异（约40%），这可能是由于它们各自的一些内在生态因素（如生态生理学）和/或体型差异所致。
