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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Seasonal patterns of infestation by monogenean parasites of fish and their relationship with water parameters in two rivers with different disturbance gradients in southeastern Brazil

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Author(s):
L. A. R. Leite [1] ; F. F. Januário [2] ; L. S. Pelegrini [3] ; B. Antoniassi [4] ; R. K. Azevedo [5] ; V. D. Abdallah
Total Authors: 6
Affiliation:
[1] Universidade Estadual Paulista. Instituto de Biociências - Brasil
[2] Centro Universitário do Sagrado Coração. Pró-reitoria de Pesquisa e Pós-graduação - Brasil
[3] Universidade Federal do Amazonas. Laboratório de Ictiologia e Ordenamento Pesqueiro do Vale do Rio Madeira - Brasil
[4] Centro Universitário do Sagrado Coração. Pró-reitoria de Pesquisa e Pós-graduação - Brasil
[5] Centro Universitário CESMAC. Programa de Pós-graduação em Análise de Sistemas Ambientais - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Brazilian Journal of Biology; v. 83, 2023-05-15.
Abstract

Abstract Here, we evaluate the relationships between the infestation rates of five monogenean parasites species with the dry and wet seasons, with the organic and inorganic parameters of the water of two rivers: the Jacaré-Pepira and Jacaré-Guaçú, and with the condition factors of its fish hosts: Serrasalmus maculatus and Astronotus crassipinnis, in the state of São Paulo, southeastern Brazil. Fish were collected between January and December 2017. Anacanthorus serrasalmi, Amphithecium speirocamarotum and Gussevia asota had higher abundance rates (Student’s t test, p ≤ 0.05) in the wet season. Gussevia asota had its abundance negatively correlated to nitrate in the Jacaré-Pepira River and with total nitrogen and potassium in the Jacaré-Guaçú River. Regarding the fish hosts condition factors, was observed a positive correlation with the abundances of G. asota in the Jacaré-Guaçú River, and with A. serrasalmi in the Jacaré-Pepira River. In general, wet season favored an increasing in the infestation rates of the monogeneans parasites in their host species, mainly in the river considered as the most polluted, the Jacaré-Guaçú River. Of the five parasites species analyzed in this study, only Gussevia astronoti and Rhinoxenus piranhus had no interaction with seasonality, river water variables, or fish host condition factors. On the other hand, G. asota had interactions both with water parameters (nitrate and total nitrogen) and with the hosts condition factors, which reflected in the abundance and intensity rates, showing itself as a species sensitive to changes in the environment and, therefore, that can be considered as a bioindicator organism. (AU)

FAPESP's process: 17/02901-6 - Qualitative and quantitative analysis of parasites of two species of fish from the jacaré-pepira and jacaré-guaçu rivers, belonging the middle River Tietê basin, São Paulo, Brazil
Grantee:Felipe Freitas Januário
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/00566-5 - Fish parasites as bioindicators of heavy metal accumulation in the Jacaré-Pepira and Jacaré-Guaçú rivers, Tietê-Jacaré River Basin, State of São Paulo, Brazil
Grantee:Lucas Aparecido Rosa Leite
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/21040-9 - THE METAZOAN PARASITES BIODIVERSITY OF DOMINANT FISH SPECIES FROM IBITINGA'S HYDROELECTRIC POWER STATION RESERVOIR AND ITS TWO MAIN AFFLUENTS, THE RIVERS: JACARÉ-PEPIRA AND JACARÁ-GUAÇU LOCATED IN THE STATE OF SÃO PAULO, BRAZIL.
Grantee:Angela Mitie Otta Kinoshita
Support Opportunities: Regular Research Grants