中文摘要：

调查了大亚湾海域13种石斑鱼（Epinephelus spp.）寄生单殖吸虫群落,结果发现有10种鱼感染单殖吸虫,占调查鱼种类的四分之三,检获单殖吸虫16种,隶属于3科5属,其中拟合片虫属（Pseudorhabdosynochus spp.）10种;除鞍带石斑（E.lanceolatus）和拟青石斑（E.fasciatomaculosus）外,8种鱼可分别感染3—7种单殖吸虫;感染单殖吸虫种类最多的是玳瑁石斑（E.quoyanus）达7种,次之是青石斑（E.awoara）和养殖的橙点石斑（E.bleekeri）均感染6种;各单殖吸虫种类中,感染强度最大的是拟合片虫（P.serrani））（棕点石斑,E.fuscoguttatus）128只/尾,次之是石斑拟合片虫（P.grouperi）（青石斑）62只/尾,接下来是斜带拟合片虫（P.coioidesis）（大斑石斑,E.macrospilos）59只/尾和杯阴拟合片虫（P.cupatus）（玳瑁石斑）49只/尾;平均密度最高的是棕点石斑上检获的拟合片虫128只/尾;在检获的16种单殖吸虫中,8种可分别寄生于2种或2种以上石斑鱼,石斑鳞盘虫（Diplectanum grouperi）和拟合片虫在6种石斑鱼上都能检获,符合广寄生单殖吸虫种特征。有5种鱼检查尾数5尾以上的,其中玳瑁石斑单殖吸虫感染率最高62.07%,其内群落的物种丰富度与宿主体长呈显著正相关。

英文摘要：

The community structure of monogeneans in Epinephelus spp. from Daya Bay, South China Sea was studied, Thirteen species of Epinephelus spp. （12 wild species and 2 species cultured-cage） were studied, from which 16 mongenean species, belonging to 5 genera of 3 families were found in 10 species of Epinephelus spp., more than three fourth. Except for E. lanceolatus and E. fasciatomaculosus, every of 8 species of fish severally harboured 3 to 7 species of monogeneans. In the species richness： 7 in E. quoyanus and 6 in E. awoara and E. Bleekeri; in intensity： 128 parasites/fish for P. serrani （E. fuscoguttatus）, 62 for P. grouperi （E. awoara）, 59 for P. coioidesis （E. macrospilos）, and 49 for P. cupatus （E. quoyanus）; the most abundance is P. serrani （E.fuscoguttatus） reached at 128 parasites per fish. Among the 16 species of monogeneans, 8 could parasitize more than 2 fish species. Diplectanum grouperi and Pseudorhabdosynochus serrani were detected from 6 fish species in the study. Among 5 fish species screened for over 5 individuals, E. quovanus was the most prevalence of 62.07%, in which the species richness of ectoparasites in E. quoyanus at infracommunity level was significantly correlated positively with the size of host.