Digenea of Hoplias intermedius and Hoplias malabaricus (Actinopterygii, Erythrinidae) from upper São Francisco River, Brazil

Abstract

Digenea of Hoplias intermedius and Odhner, 1902, and Pseudosellacotyla lutzi (Freitas, 1941) Yamaguti, 1953. The prevalence of the metacercariae was higher than that of the adult digeneans of erythrinids from the upper São Francisco River as a result of piscivorous feeding habits of these adult erythrinids. The presence of metacercariae and adult digeneans indicate that they act as intermediate and definitive hosts, respectively, in their biological cycles. Hoplias intermedius is a new host for the four species of Digenea, and the São Francisco River basin is a new location for the known geographical distributions of P. spatula and P. lutzi.

Digenea parasites of Acestrorhynchus falcirostris (Osteichthyes, Acestrorhynchidae) in the state of Amazonas, Brazil

“…In Brazil, it was reported by Fernandes (1984) in Colossoma macropomum Cuvier, 1816 and by Costa et al (2015) in Hoplias intermedius Günther, 1864 and H. malabaricus. The specimen studied here is in agreement with those already reported having eggs slightly wider.…”

Ithyoclinostomum dimorphum Diesing, 1850 (Digenea, Clinostomidae) in Hoplias malabaricus (Erythrinidae) with the fi rst report of infection of the eyes

“…However, it was higher than that reported for H. malabaricus from the São Francisco River (10.6 %) infected by Ithyoclinostomum sp. (Costa et al ., 2015) and from the Arari Lake, in the Ilha do Marajó in the state of Pará (0.9 %), infected by I. dimorphum (Benigno et al ., 2014). However, these last two studies examined a greater number of H. malabaricus specimens than the present study.…”

“…Hoplias malabaricus Bloch, 1794 (Trahira) is widely distributed in South America (Costa et al ., 2015), and is abundant in several environments of the Amazon, São Francisco and Paraná hydrographic basins. The dispersion of this piscivorous fish is associated with its capacity to survive for long periods without feeding and to remain in environments with a low concentration of dissolved oxygen (Malabarba, 2006).…”

<b>Chemical composition of lipids from native and exotic fish in reservoirs of the state of Ceará, Brazil

“…& Amador- Del-Angel, 2007), especially in the Brazilian and Peruvian Amazon (Simonović et al, 2010). Hoplias malabaricus is a characiform wolf-fish belonging to the Erythrinidae family, popularly known in Brazil as 'traíra' (Costa, Monteiro, & Brasil-Sato, 2015), widely distributed in South America (Corrêa, Karling, Takemoto, Ceccarelli, & Ueta, 2013). Further, the 'tucunaré' (Cichla sp.)…”