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Myxosporea parasites of Bachyplatystoma filamentosum and Leiarius marmoratus - Diversity and parasite-host interaction

Grant number: 23/04537-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): August 01, 2023
Effective date (End): April 30, 2025
Field of knowledge:Biological Sciences - Parasitology
Principal Investigator:Edson Aparecido Adriano
Grantee:Francine Coelho da Rosa
Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:18/24980-8 - Myxozoa - cnidarians adapted to parasitismo: integrating different tools to investigate diversity, evolutionary history, development, and host-parasite interactions, AP.BTA.TEM

Abstract

Fish, in natural or farmed systems, are hosts to a wide diversity of parasites belonging to several taxa. Among the fish parasites, the species belonging to the Phylum Cnidaria, subphylum Endocnidozoa, Class Myxozoa (myxozoans) stand out. Myxozoans are organisms that, as an adaptation to parasitism, have undergone intense simplification and reduction in body size in relation to free-living cnidarians. South America is one of the continents with the largest freshwater ichthyofauna, and interest in studying fish parasitic Myxozoa in this region has recently intensified. Studying the diversity of parasites and understanding their role in the environment is crucial for conservation purposes. Brachyplatystoma filamentosum and Leiarius marmoratus are Siluriformes of the family Pimelodidae with great importance for commercial fisheries and fish farming. Thus, this project aims to identify and describe the myxozoan fauna found infecting B. filamentosum and L. marmoratus caught in the Amazon basin, region of Santarém, State of Pará and Manaus, State of Amazonas. To this end, morphological, histological, ultrastructural (scanning and transmission electron microscopy) and molecular (small subunit ribosomal DNA - SSU rDNA sequencing) analyses will be carried out, aiming at taxonomy, parasite-host interaction and phylogeny of the parasites to be found.

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