Niche overlap among three species of pinworm parasitic in the hindgut of the American cockroach, Periplaneta americana
Niche overlap among three species of pinworm parasitic in the hindgut of the American cockroach, Periplaneta americana
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DOI：
10.2307/3284477
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发表时间：
1998-04-01
影响因子：
1.3
通讯作者：
Adamson, M
中科院分区：
文献类型：
--
作者：
Connor, S;Adamson, M
美洲大蠊（Periplaneta americana）个体常同时携带3种蛲虫（尖尾目：线虫纲），即布尔霍氏绦虫（Thalena bulhoesi）、无尾雷线虫（Leidynema apaptulatum）和狄氏锤线虫（Hammerschmidtiella diesingi）。我们寻找证据的营养生态位分离的基础上的差异，大小偏好之间的3个物种。将直径为1、3、6和10 μ m的荧光珠在琼脂中混合，并喂给各个宿主。从宿主中取出每个物种的成年雌性蠕虫，并评估每个蠕虫中每个大小的珠子的数量。霍恩的R-0和Hurlbert的L指数的生态位重叠的infractionities包含至少1个每种计算。Hurlbert指数扩展了Horn指数所提供的信息，以包括每种资源的比例可用性的影响。这两项指控表明，缺乏营养隔离的基础上，颗粒大小之间的3个物种。然而，不同物种的消耗率不同：L。apapericulatum比T. bulhoesi，比H.迪辛吉。
Individual American cockroaches, Periplaneta americana, often harbor 3 species of pinworm (Oxyurida: Nematoda) Thelastoma bulhoesi, Leidynema appendiculatum, and Hammerschmidtiella diesingi, simultaneously. We looked for evidence of trophic niche segregation based on differences in size preference among the 3 species. Fluorescent beads of 1, 3, 6, and 10 mu m diameter were mixed in agar and fed to individual hosts. Adult female worms of each species were removed from hosts, and the number of each size of bead in each worm was assessed. Horn's R-0 and Hurlbert's L indices of niche overlap were calculated for infracommunities containing at least 1 of each species. Hurlbert's index extends the information given by Horn's index to include the effects of proportional availability of each resource. Both indicts indicated a lack of trophic segregation based on particle size among the 3 species. Species did, however, differ in consumption rate: L. appendiculatum ate more than T. bulhoesi, which ate more than H. diesingi.