Two monogeneans species, Polylabris mamaevi Ogawa & Egusa, 1980 and Tetrancistrum nebulosi Young, 1967, are sympatric on the gills of Siganus fuscescens (Houttugn, 1782) in the South China Sea. An investigation into their distribution on the host's gills based on monthly samples from both wild and caged populations revealed that these 2 species co-occurred on the same gill arches, but they were segregated. P. mamaevi attached to the distal half of the gill filaments, whereas T. nebulosi attached to the proximal half. This difference may partly be attributed to microhabitat specialization. Microhabitat distributions were intensity dependent for both species. As intensity increased, monogeneans were increasingly found on the second, third, and even fourth gill arches, and niche breadths increased. The changes in distribution and niche breadths at the host gill arch level in relation to differences in host size and sampling period were considered to represent a functional response to increased intensity. Differences in host resources, in either net-caged or wild populations, did not significantly influence the parasite distributions at the host gill arch level. Simultaneous infections of these 2 species were common, but there was no evidence of negative interspecific interactions.
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October 2006
Research Article|
October 01 2006
SPATIAL DISTRIBUTIONS OF TWO SPECIES OF MONOGENEANS ON THE GILLS OF SIGANUS FUSCESCENS (HOUTTUYN) AND THEIR SEASONAL DYNAMICS IN CAGED VERSUS WILD-CAUGHT HOSTS
Tingbao Yang;
Tingbao Yang
Research Center for Parasitic Organisms and State Key Laboratory of Biocontrol, School of Life Sciences, Zhongshan University, Guangzhou 510275, China. tingbao123@163.com
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Jifang Liu;
Jifang Liu
Research Center for Parasitic Organisms and State Key Laboratory of Biocontrol, School of Life Sciences, Zhongshan University, Guangzhou 510275, China. tingbao123@163.com
* Guangzhou Agricultural Technology Extension Center, Tianlubei Road 468, Guangzhou, 510520 China
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David I. Gibson;
David I. Gibson
Research Center for Parasitic Organisms and State Key Laboratory of Biocontrol, School of Life Sciences, Zhongshan University, Guangzhou 510275, China. tingbao123@163.com
† Zoology Department, Natural History Museum, London SW7 5BD, U.K
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An Dong
An Dong
Research Center for Parasitic Organisms and State Key Laboratory of Biocontrol, School of Life Sciences, Zhongshan University, Guangzhou 510275, China. tingbao123@163.com
‡ State Protective Station of the Indopacific Humpback Dolphin, Sousa chinensis (Osbeck, 1765), in the Pearl River Estuary, Zhuhai, 519000, China
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J Parasitol (2006) 92 (5): 933–940.
Citation
Tingbao Yang, Jifang Liu, David I. Gibson, An Dong; SPATIAL DISTRIBUTIONS OF TWO SPECIES OF MONOGENEANS ON THE GILLS OF SIGANUS FUSCESCENS (HOUTTUYN) AND THEIR SEASONAL DYNAMICS IN CAGED VERSUS WILD-CAUGHT HOSTS. J Parasitol 1 October 2006; 92 (5): 933–940. doi: https://doi.org/10.1645/GE-796R1.1
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