Ecological implications of floods on the parasite communities of two freshwater catfishes in a Neotropical floodplain

Autor(es)

Fadel Yamada, Priscilla de Oliveira ; Yamada, Fabio Hideki ; da Silva, Reinaldo Jose ; dos Anjos, Luciano Alves

• Tipo de documento: Artigo Científico
• Fonte: ACTA PARASITOLOGICA; v. 62, n. 2, p. 312-318, JUN 2017.
• Citações Web of Science: 1

Resumo

The parasite communities of two freshwater catfishes (Auchenipterus osteomystax and Trachelyopterus galeatus) were analyzed during the dry and rainy seasons in a Neotropical floodplain. The nature of river-floodplain systems places specific demands on parasite community structure, due to changes in the host environment. It was therefore hypothesized that flood conditions lead to an increase in the richness and abundance of fish parasites in the rainy season at the mouth of Aguape +/- River floodplain. The Auchenipterus osteomystax parasite community was richer (11 vs. eight) in species than T. galeatus, although the latter exhibited a greater parasite burden (F 1,108 = 126.99, P< 0.0001). During the rainy season both host species demonstrated high levels of parasitism (least squared means +/- SE = 1.69 +/- 0.05 vs. 1.34 +/- 0.05; F 1,108 = 21.45, P< 0.0001). Differences were found in the composition of the parasite species and the proportion of parasites for each host species and between each seasonal period. Flood conditions during the rainy season caused a change in the composition and structure of the parasitic communities. The results corroborate the hypothesis that floods are one of the most significant influences on shaping the parasite communities of fish in floodplains. Our greatest concern is the reduction these dynamics and effects bring about on local biota and, consequently, in host-parasite interaction. We would therefore like to take this opportunity to warn environmental agencies and hydroelectric companies about the importance of the conservation of the diversity of this location. (AU)

• Processo FAPESP: 14/14298-4 - Interação parasito hospedeiro e os efeitos recíprocos potencial sobre o ecossistema
• Beneficiário: Fábio Hideki Yamada
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 11/22603-3 - Helmintos de peixes como bioindicadores ambientais na represa de Jurumirim (Alto rio Paranapanema, SP, Brasil).
• Beneficiário: Fábio Hideki Yamada
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/50377-1 - Taxonomia morfológica e molecular de helmintos parasitas de animais ectotérmicos no Brasil
• Beneficiário: Reinaldo José da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/25786-7 - Estrutura da comunidade parasitária de duas espécies de peixes autóctone da RPPN Foz do Rio Aguapeí, Alto Rio Paraná
• Beneficiário: Priscilla de Oliveira Fadel Yamada
• Modalidade de apoio: Bolsas no Brasil - Mestrado