Universidade Regional do Cariri (URCA), Departamento de Ciências Biológicas (DCBio), Laboratório de Ecologia Parasitária (LABEP), Rua Cel. Antônio Luis, 1161, 63105-000 Crato, CE, Brazil.
An Acad Bras Cienc. 2021 Oct 29;93(suppl 3):e20200472. doi: 10.1590/0001-3765202120200472. eCollection 2021.
The present study is the first report of Spiroxys larvae parasitizing stomach and intestine of three fish species in stream of Caatinga domain, Northeast, Brazil. A total of 120 fish specimens, 40 of Astyanax bimaculatus, 40 of Hoplias malabaricus, and 40 of Hoplosternum littorale were examined for nematodes. A total of 633 specimens of Spiroxys larvae were recovered for the three fish species: 227 in A. bimaculatus (prevalence (%) = 48; mean abundance = 5.78 ± 1.78 (range = 0-70); and mean intensity = 11.95 ± 2.7 (range = 2-70)), 176 in H. malabaricus (prevalence (%) = 42.5; mean abundance = 4.40 ± 1.55 (range = 0-53); and mean intensity = 10.35 ± 2.38 (range = 2-53)) and 230 in H. littorale (prevalence (%) = 42.5; mean abundance = 5.75 ± 1.98 (range = 0-52); and mean intensity = 13.53 ± 3.04 (range = 1-52)). This study expands the range of the geographic distribution of nematodes of the genus Spiroxys and increase the list of hosts, as well as contributing to the knowledge of fish parasites biodiversity in Caatinga domain.
本研究首次报道了 Spiroxys 幼虫寄生在巴西东北部卡廷加地区溪流中的三种鱼类的胃和肠道。共检查了 120 条鱼标本，其中 40 条 Astyanax bimaculatus、40 条 Hoplias malabaricus 和 40 条 Hoplosternum littorale 被检查是否有寄生虫。从这三种鱼中共回收了 633 条 Spiroxys 幼虫：227 条在 A. bimaculatus（流行率（%）=48；平均丰度=5.78±1.78（范围=0-70）；平均强度=11.95±2.7（范围=2-70）），176 条在 H. malabaricus（流行率（%）=42.5；平均丰度=4.40±1.55（范围=0-53）；平均强度=10.35±2.38（范围=2-53））和 230 条在 H. littorale（流行率（%）=42.5；平均丰度=5.75±1.98（范围=0-52）；平均强度=13.53±3.04（范围=1-52））。本研究扩展了 Spiroxys 属线虫的地理分布范围，增加了宿主名单，并有助于了解卡廷加地区鱼类寄生虫的生物多样性。
