Hatano F H, Gettinger D, Van Sluys M, Rocha C F D
Departamento de Ecologia, IBRAG, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, no. 524, Maracanã, Rio de Janeiro, RJ, CEP: 20550-011, Brazil.
Parasite. 2007 Jun;14(2):107-12. doi: 10.1051/parasite/2007142107.
We studied some parameters of the parasitism by the mite Hannemonia sp. on the endemic frog Hylodes phyllodes in the Atlantic Forest of Ilha Grande (Rio de Janeiro State, Brazil). Prevalence, mean abundance, mean intensity and total intensity of infestation, body regions infected, and host sexual differences in parasitism rate of the larvae of Hannemania sp. on individuals of H. phyllodes were assessed. Prevalence was 86.5% (N = 37; total of 1,745 larvae of Hannemania sp) for male hosts and 91.7% (N = 12; total of 330 larvae) for female hosts, with no significant difference between the sexes. Overall prevalence of Hannemania sp. on H. phyllodes was 87.7%. Mean intensity of infestation in males (54.5 +/- 42.5; range 1-173 larvae) was higher than in females (29.9 +/- 47.6; range 1-166). We conclude that the rates of intensity, abundance, and prevalence of Hannemania larvae parasitizing Hylodes phyllodes at Ilha Grande were considerably high, suggesting that this species of anuran constitutes a relevant host for this mite species to complete its life-cycle in the area. Differences between males and females in infestation rates probably reflect their differential use of space in the forest.
我们研究了螨类汉内螨属（Hannemonia sp.）寄生于大伊利亚岛（巴西里约热内卢州）大西洋森林中的特有蛙类叶状溪蟾（Hylodes phyllodes）的一些参数。评估了汉内螨属幼虫在叶状溪蟾个体上的感染率、平均丰度、平均强度和总感染强度、感染的身体部位以及宿主在寄生率上的性别差异。雄性宿主的感染率为86.5%（N = 37；汉内螨属幼虫总数为1745只），雌性宿主的感染率为91.7%（N = 12；幼虫总数为330只），两性之间无显著差异。汉内螨属在叶状溪蟾上的总体感染率为87.7%。雄性的平均感染强度（54.5 +/- 42.5；范围为1 - 173只幼虫）高于雌性（29.9 +/- 47.6；范围为1 - 166只）。我们得出结论，在大伊利亚岛，汉内螨属幼虫寄生于叶状溪蟾的强度、丰度和感染率相当高，这表明这种无尾目物种是该螨类物种在该地区完成其生命周期的相关宿主。感染率在雄性和雌性之间的差异可能反映了它们在森林中对空间利用的不同。
