Sazonalidade da fauna de metazoários de Pygocentrus nattereri (Kner, 1858) no lago Piranha (Amazonas, Brasil) e a avaliação de seu potencial como indicadora da saúde do ambiente

Abstract

of the metazoan fauna of Pygocentrus nattereri (Kner, 1858) in Piranha Lake, (Amazonas, Brazil), and evaluation of its potential as an indicator of environmental health. Biota Neotrop. 11(1): http://www.biotaneotropica.org.br/v11n1/en/ abstract?article+bn03111012011. Abstract:The metazoan parasitic fauna of Pygocentrus nattereri collected in different phases of hydrologic cycle of Piranha lake was studied during the year of 2007. The study area is located in gas pipeline Coari-Manaus construction zone, near the municipality of Manacapuru-Am. The relationship between condition factor and parasite occurrence and the viability of use the parasitic fauna as an environmental bio-indicator were verified. The following Monogenoidea were collected: Amphithecium microphalum, Amphitecium brachycirrum, Amphitecium calycinum, Amphithecium catalaoensis, Amphithecium junki, Pithanothecium amazonensis e Rhinoxenus piranhus, as well as the nematode Procamallanus inopinatus, the copepod Miracetyma sp. and the isopod Anphira branchialis. There was not significant correlation between the parasite occurrence and the condition factor. There were significant variances in the parasitic index according to the different periods of hydrologic cycle and P. nattereri has achieved the conditions described in the literature to be select a fish-host and his parasite fauna as biomonitor.

Ecology and seasonal variation of parasites in wild Aequidens tetramerus, a Cichlidae from the Amazon

“…However, this host had helminths species accounting on most part from its parasite fauna. The main factors responsible for structuring this parasite community in fish population have been predominantly the host behavior, availability of infective stages in the environment and seasonality (Violante-González et al 2008;Vital et al 2011;Neves et al 2013).…”

“…In addition, the appearance of a floodplain favored the reproduction of these ectoparasites with direct life cycle during the rainy season. In the Amazon, the lake-floodplain systems may change the population dynamics of native fauna, mainly invertebrate and fish populations, with direct or indirect influence on structure and species composition of parasites in fish, as well as on the host life (Vital et al 2011).…”

“…This cycle also affects the feeding behavior of hosts (ViolanteGonzález et al 2008) by modifying its exposure to certain parasite species, and it may lead to changes in the community structure of parasites from the host fish. Few investigations have evaluated the effects of seasonality on parasite communities of fish species from Amazon lakes (Vital et al 2011, Neves et al 2013; however, no study investigated the tides influence in the estuarine region of the Amazon River system. In the eastern Amazon (Northern Brazil), the tributaries of Amazon River have strong influence of tides of this river.…”

AS ESPÉCIES DE ISOPODA (CRUSTACEA: CYMOTHOIDEA) PARASITAS DE SERRASALMUS ALTISPINIS MERCKX, JÉGU & SANTOS, 2000 (CHARACIFORMES: SERRASALMIDAE) COLETADAS EM LAGOS DE VÁRZEA DA AMAZÔNIA, BRASIL

“…Em peixes da família Serrasalmidae o Isopoda Amphira branchialis foi registrado em P. nattereri (Thatcher, 1993;Carvalho et al, 2004;Vital et al, 2011;Morais, 2012, Tavares-Dias et al, 2015, em S. spilopleura e em Serrasalmus sp. (Thatcher, 1993, Tavares-Dias et al, 2015.…”

AS ESPÉCIES DE COPEPODA (CRUSTACEA: ERGASILIDAE) PARASITAS DOS FILAMENTOS BRANQUIAIS DE Potamorhina latior (Spix & Agassiz, 1829) (CHARACIFORMES: CURIMATIDAE) DE LAGOS DE VÁRZEA DA AMAZÔNIA CENTRAL, BRASIL

“…A parasitofauna de (Kner, Pygocentrus nattereri 1858) capturadas em lagos de várzea do rio Solimões apresentou as maiores prevalências durante os meses de vazante e seca (Vital ., 2011;Morais et al 2011). Neste trabalho as maiores prevalências das três espécies de Copepoda ocorreram nos meses da vazante.…”