Os parasitos de peixes de igarapés da reserva florestal Ducke, Manaus, AM
Small fishes from streams the upland forests represent at least half of the South American ichthyofauna diversity. However, these fishes are poorly studied and, for the majority of species, their parasites are still unknown or not described. In this study 190 fishes belonging to 26 species from R...
| Autor principal: | Anjos, Camila Saraiva dos |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11350 http://lattes.cnpq.br/7847296155030845 |
| Resumo: |
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Small fishes from streams the upland forests represent at least half of the South American
ichthyofauna diversity. However, these fishes are poorly studied and, for the majority of
species, their parasites are still unknown or not described. In this study 190 fishes belonging
to 26 species from Reserva Florestal Ducke were examined in order to identify their parasites.
Fishes were captured between January and September 2011 with one single collection
conducted in each stream, totaling six. Sampling locations are chosen in order to include three
streams from both drainage areas on each side of the plateau which divides the reserve. All
streams were georeferenced and environmental variables such as water temperature, pH,
average channel width, depth, average current velocity and substrate were measured. Fishes
were identified, measured, and necropsied in order to collect their parasites. The abundance
and diversity of fishes collected (N = 190) ranged among streams, as well as the amount of
parasites found (N = 1608). From the five groups of parasites collected, Nematoda was the
most abundant with 972 individuals. The most common organ site of infestation was the swim
bladder. The prevalence of infestation, mean abundance and mean intensity had great
variation among fish species and taxonomic groups between the two watersheds. A significant
negative relationship between parasite prevalence and fish standard length was found (r = -
0.45, P = 0.03). However, there was no significant relationship between the parasite
abundance and the fish standard length (r = 0.18, P = 0.37). Stream fishes from Reserva
Florestal Ducke host a diverse parasite fauna, where many species have not been described,
being an important contribution for the knowledge of the parasite-host relationship in the
Amazon. |