Author(s): LIMA, E. S.; OLIVEIRA, M. S. B.; TAVARES-DIAS, M.

Summary: This study investigated the infuence of temporal and seasonal (i.e., rainy and dry seasons) in communities and infracommunities of metazoan parasites in Pimelodus ornatus, a Siluriformes from the Amazon River in the state of Amapá, in northern Brazil. A total of 144 fsh were collected during 2020 and 2021. In 2020, fve species of parasites were found (1 Monogenea, 3 Nematoda, and 1 Cestoda), and in 2021, seven species of parasites were found (1 Monogenea, 3 Nematoda, 1 Cestoda, 1 Digenea, and 1 Crustacea). In 2020, Spirocamallanus inopinatus was dominant, while in 2021, Contracaecum sp. was dominant. Brillouin diversity, species richness, and evenness were higher in 2021. There were diferences for some parasite infracommunities between years and between seasonal periods. Brillouin diversity and species richness were higher in the rainy season, but there were no diferences in evenness and Berger-Parker dominance between the seasonal periods. Temporal and seasonal variations were mainly infuenced by rainfall levels, oxygen levels, and environmental temperature and, later, by the availability of infective stages of parasites in the environment and the size of the hosts. Lastly, the infuence of the temporal and seasonal variations on the structure of communities and infracommunities of parasites was weaker than expected due to the low infection rates of the majority of parasites found.

Publication year: 2022

Types of publication: Journal article

Unit: Embrapa Amapá

Keywords: Climatologia, Climatology, Transmissão de Doença, Tristeza Parasitaria, Variação Sazonal