Parasitismo em tambatinga (Colossoma macropomum x Piaractus brachypomus, Characidae) cultivados na Amazônia, Brasil

Abstract

RESUMOOs estudos sobre os parasitos e doenças parasitárias são de grande interesse para a piscicultura, uma vez que podem afetar o crescimento dos peixes. O objetivo deste estudo foi investigar a fauna parasitária e relação parasito-hospedeiro em Colossoma macropomum x Piaractus brachypomus (tambatinga) de 10 pisciculturas do estado do Amapá, Amazônia. Parasitism in tambatinga (Colossoma macropomum x Piaractus brachypomus, Characidae) farmed in the Amazon, Brazil ABSTRACTThe studies on parasites and parasitic diseases are of great interest to fish farms, because both can affect the performance of the fish. The aim of study was to investigate the parasitic fauna and parasite-host relationship in Colossoma macropomum x Piaractus brachypomus (tambatinga) of 10 fish farms from the Amapá State, in the Amazon. Of the 503 fish examined 63.1% were parasitized, and a total of 49,299,189 parasites were collected, including Ichthyophthirius multifiliis, Piscinoodinium pillulare, Trichodina sp., Tetrahymena sp., Anacanthorus spathulatus, Linguadactyloides brinkmanni, Mymarothecium boegeri, Notozothecium janauachensis, Procamallanus (Spirocamallanus) inopinatus, Neoechinorhynchus buttnerae and Perulernaea gamitanae. Ichthyophthirius multifiliis was the dominant species, followed by P. pillulare and monogenoideans; these two parasites and P. gamitanae showed an aggregated dispersion pattern. We found a positive correlation between host length and the overall parasitic prevalence, as well as between fish size and the abundance of I. multiliis, P. pillulare, monogenoideans and P. gamitanae, but infection levels did not affect the relative condition factor of hosts. Management, low environmental quality and poor sanitary conditions of the fish farms favored the occurrence of ectoparasites, but the presence of endoparasites was due to supplying the ponds directly with water of natural water bodies. This is first report of I. multiliis, P. pillulare, Trichodina sp., Tetrahymena sp., A. spathulatus, N. janauachensis, N. buttnerae and P. (S.) inopinatus for tambatinga in Brazil.

Neoechinorhynchus buttnerae (Acanthocephala) infection in farmed Colossoma macropomum: A pathological approach

“…macropomum × ♂Piaractus brachypomus Cuvier) and the hybrid tambacu (4.4%) (♀C. macropomum × ♂Piaractus mesopotamicus Holmberg) from Amapá (Dias et al, 2015).…”

Seasonality of parasitic helminths of Leporinus macrocephalus and their parasitism rates in farming systems in the Amazon

“…In the Amazon region, some authors (ARAÚJO et al, 2009;MARINHO et al, 2013;DIAS et al, 2015;SILVA et al, 2016) have reported that high prevalence of parasites in fish farms was associated with low levels of dissolved oxygen in the water, high temperatures and inadequate sanitary conditions. These authors also reported that replenishing the breeding areas with water from natural environments also influenced occurrences and levels of infection.…”

The digestive tube of Piaractus brachypomus: gross morphology, histology/histochemistry of the mucosal layer and the effects of parasitism by Neoechinorhynchus sp.

“…High individual values for K n , an indicator of fish health, were obtained for P. brachypomus with low levels of parasitic intensity by Neoechinorhynchus sp. These results were similar to what was obtained for the tambatinga hybrid C. macropomum x P. brachypomus (Dias et al, ), parasitised at low densities by N. buttnerae and higher densities by Ichthyophthirius multifiliis , Piscinoodinium pillulare, and Monogenoidea. In a study on the parasite infracommunity in cage‐reared rainbow trout Oncorhynchus mykiss (Walbaum 1792), which was strongly dominated by Pomphorhynchus laevis , no significant influence of acanthocephalans on fish condition was found (Çevrimel & Soylu, ).…”