Abstract
This study compared the parasites community in Corydoras ephippifer, Corydoras melanistius, Corydoras amapaensis and Corydoras spilurus from tributaries from the Amapari River in State of Amapá (Brazil). A total of 151 fish of these four ornamental species were examined, of which 66.2% were parasitized by one or more species, and a total of 732 parasites were collected. Corydoras ephippifer (91.2%) and C. spilurus (98.8%) were the most parasitized hosts, while C. amapaensis (9.6%) was the least parasitized. A high similarity (≅ 75%) of parasite communities was found in the host species. Hosts were parasitized by Procamallanus (Spirocamallanus) inopinatus, Camallanus sp. and metacercariae of digeneans. The parasites had an aggregated dispersion pattern, but in C. ephippifer a random dispersion of P. (S.) inopinatus was found. The parasite community was characterized by a low species richness (1-4 parasites per host), low diversity and low evenness, and consisted mainly of endoparasites with high prevalence and low abundance. An important component in the determination of the helminth parasite community composition was the dominance of species that use these fish species as secondary intermediate or paratenic hosts. This was the first study on the parasite community for these four hosts. A checklist of parasite species in wild populations of Corydoras spp. from different localities was also reported here.
Highlights
Corydoras Lacépède, 1803 (Callichthyidae) are siluriforms fish distributed in part of South and Central America, but they are most abundant in the Amazonas River basin
The mean values of parasite species richness, Shannon diversity and evenness were lowest in C. amapaensis (Table IV)
The body length of C. melanistius had no correlation with the Shannon diversity index and species richness of parasites
Summary
Corydoras Lacépède, 1803 (Callichthyidae) are siluriforms fish distributed in part of South and Central America, but they are most abundant in the Amazonas River basin. PARASITES IN FOUR SPECIES OF Corydoras fish market (Rodríguez-Ithurralde et al 2014). Corydoras ephippifer Nijssen, 1972, Corydoras melanistius Regan, 1912, Corydoras amapaensis Nijssen, 1972 and Corydoras spilurus Norman, 1926, have endemic distribution in the eastern Amazon region. Corydoras ephippifer is found in some hydrographic basins in the state of Amapá (northern Brazil), while C. melanistius is distributed in basins from Suriname, French Guiana and some basins in the state of Amapá. Corydoras amapaensis is found in tributaries of the rivers Amapari and Oiapoque in the state of Amapá (Brazil), and in rivers from the French Guiana. Corydoras spilurus have distribution known in Approuagua River in French Guiana and Suriname River, in Suriname (Froese and Pauly 2018), and in tributaries from the Amapari River in the state of Amapá
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