Parasitism by Sphincterodiplostomum musculosum (Digenea, Diplostomidae) metacercariae in the eyes of Steindachnerina insculpta (Characiformes, Curimatidae)

被引:4
作者
Brandao, Heleno [1 ]
Yamada, Fabio Hideki [1 ]
Toledo, Gislayne de Melo [1 ]
Acosta, Aline Angelina [1 ]
Carvalho, Edmir Daniel [1 ]
da Silva, Reinaldo Jose [1 ]
机构
[1] Univ Estadual Paulista Julio de Mesquita Filho UN, BR-18618970 Botucatu, SP, Brazil
来源
REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA | 2014年 / 23卷 / 02期
基金
巴西圣保罗研究基金会;
关键词
Paranapanema River; freshwater fish; Steindachnerina insculpta; Brazil; JURUMIRIM RESERVOIR; FRESH-WATER; SAO-PAULO; BRAZIL; FISH; DIVERSITY; BIOLOGY; TROUT; RIVER;
D O I
10.1590/S1984-29612014038
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
New occurrences and effects of parasitism by metacercariae in fish eyes have recently been discussed in many studies. The aim of the present study was to evaluate the infection levels of the eye flukes Sphincterodiplostomum musculosum Dubois, 1936 (metacercariae) in Steindachnerina insculpta (Fernadez-Yepez, 1948) from three ecosystems under the influence of the Jurumirim reservoir (Paranapanema, Taquari and Veados Rivers). A total of 174 fish specimens were sampled between April 2011 and April 2012. There were high levels of infection by S. musculosum metacercariae in the eyes of S. insculpta from all the sampled ecosystems, thus presenting broad geographical distribution. The histological analyses revealed that the metacercariae were apparently lodged behind the retina. The smaller fish from the Taquari River were less parasitized by metacercariae than the adults. This pattern can be explained by the cumulative effect of parasitism, as demonstrated by the positive correlation between the abundance of metacercariae and fish body size.
引用
收藏
页码:144 / 149
页数:6
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