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Comparison of cophylogenetic methods in the analyses of patterns of historical association between monogenoidean parasites and their marine catfish (Siluriformes: Ariidae) from Brazilian coast

Grant number: 21/07380-0
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): December 01, 2021
Effective date (End): November 30, 2022
Field of knowledge:Agronomical Sciences - Fishery Resources and Fishery Engineering - Marine Fishing Resources
Principal researcher:Edson Aparecido Adriano
Grantee:Geusivam Barbosa Soares
Supervisor abroad: Juan Antonio Balbuena Diaz-Pines
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: Universitat de València, Spain  
Associated to the scholarship:17/17531-0 - Integrative taxonomy, phylogeny and coevolution of monogenoids (Platyhelminthes: Cercomeromorpha) parasites of Ariidae (Osteichthyes: Siluriformes) from Brazilian Coast, BP.DR


Coevolutionary studies aim at testing specific hypotheses to understand the patterns of historical associations between parasites and their hosts. Fish-monogenoidean systems provide an interesting model for historical associations due to their high specificity. Therefore, the aim of the present project is to verify whether the relationship between Chauhanellus spp. and Hamatopeduncularia spp. and their ariids hosts along the Brazilian coast can be explained by means of cospeciation processes. Twelve marine catfish species and 10 monogenoidean species will be studied in the present work. Partial DNA sequences of genes RAG2 and Cytb of the fish hosts and of genes 28S rDNA, ITS1, 5.8S and ITS2 of the parasite species will be used for phylogenetic reconstruction. Maximum likelihood and Bayesian inference phylogenetic trees of the host and parasite species will be built and used for analyses of topological congruence comparing the effectiveness of the methods Procrustean Approach to Cophylogeny (PACo) and Random Tanglegram Partitions (Random TaPas) to evaluate the role of cospeciation in the diversification of these species, as opposed to duplication and host-switching events.

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