Structure of the parasite infracommunity of Sciades proops from the Japaratuba River Estuary, Sergipe, Brazil

Abstract

The catfish species Sciades proops inhabits muddy estuaries and shallow brackish lagoons, as well as freshwater. The spatial distribution of infection with Ergasilus sp. and Contracaecum sp. showed a typical pattern of aggregate distribution. The sex of the host did not influence parasitic infections, but infection with Ergasilus sp. showed a positive and significant correlation with biometric and epidemiologic parameters, whereas infection with Contracaecum sp. was correlated only with prevalence and abundance.

Host Specificity, Community Components and Diversity Dynamics of Dactylogyrus spp. (Monogenean ectoparasites) Parasitizing Cyprinid Gills

“…The results of the present study did not observe any differences between the sexes of fish. In this regard, the current conclusions do not differ from the extracted results of some studies, which revealed the absence of any distinction in the infestation of both sexes with most monogenean parasites [31,36]. This finding also confirms the observations noted on D. minutus of Cyprinus carpio [37], and D. rectotrabus of Garra rufa in the Lesser and Greater Zab Rivers of Iraq [38].…”

“…It has been suggested that some intraspecific morphological factors in both sexes of some species have essential impacts on their occupation and survival in a particular habitat type [30]. Many factors can affect the CCs of the fish parasite fauna, such as food, host sex, physical and chemical parameters of water [31,32]. The fish of both sexes with similar morphology and feeding habits may additionally provide evidence of the similarity of the infection with parasites [33].…”

Ectoparasitic copepod infestation on a wild population of Neotropical catfish Sciades herzbergii Bloch, 1794: Histological evidences of lesions on host

“…The observed trend of increasing infestation intensity in larger individual is commonly found in studies of ectoparasitic copepod on catfish host ( Carvallho et al, 2015 ) and other fish species (eg. Cañas et al 2013 ).…”

“…According to Carvallho et al (2015) , because their feeding preferences, catfish can serve as intermediate, definitive or paratenic hosts of various species of parasites and contribute to expansion of infestations on intra or inter specific hosts. All these characteristics join to the high values of prevalence observed in “Las Marites” lagoon, seem to indicate that infestation of Lepeophtheirus sp could be an important factor affecting wild populations of S. herzbergii and another aquatic species in this water body.…”

Parasitic monogenoideans of Sciades herzbergii as bioindicators of environmental quality in amazonian estuarines ecosystems

“…Other studies have reported that parasites with low pathogenicity can occur in high abundance in the host without negatively influencing their condition (Lizama et al, 2006;Moreira et al, 2010). Furthermore, it was verified that the kn of the marine catfish, Netuma barba (Lacepède, 1803) and Sciades proops (Valenciennes, 1840), was not influenced by parasite infestation from several taxa, including monogenoids (Tavares & Luque, 2004;Carvalho et al, 2015).…”