Influence of Seasonality and Culture Stage of Farmed Nile Tilapia (<i>Oreochromis niloticus</i>) with Monogenean Parasitic Infection
Elisabeth de Aguiar Bertaglia,
William Eduardo Furtado,
Ângela Teresa Silva e Souza,
Manoela Clemente Fernandes,
Scheila Anelise Pereira,
Elenice Martins Brasil,
José Luiz Pedreira Mouriño,
Gabriela Tomas Jerônimo,
Maurício Laterça Martins
Affiliations
Elisabeth de Aguiar Bertaglia
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
William Eduardo Furtado
Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China
Ângela Teresa Silva e Souza
Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina 86039-000, PR, Brazil
Manoela Clemente Fernandes
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
Scheila Anelise Pereira
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
Elenice Martins Brasil
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
José Luiz Pedreira Mouriño
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
Gabriela Tomas Jerônimo
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
Maurício Laterça Martins
AQUOS Laboratory Health of Aquatic Organisms, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, Florianópolis 88040-900, SC, Brazil
The aim of this study was to observe how abiotic and biotic factors in a tropical region influence the rate of monogenean parasitism in Nile tilapia (Oreochromis niloticus) that are farmed in net cages. A total of 240 sexually reversed fish were analyzed, and 20 from each culture stage were collected during each sampling month. Overall, 60 fish were sampled in April (autumn), 60 in August (winter), 60 in November (spring), and 60 in February (summer). Fish were collected from a commercial fish farm located in Capivara Reservoir in the lower Paranapanema River region of Paraná, Brazil. In total, 3290 monogenean parasites were collected from fish gills of the following species: Cichlidogyrushalli, C. thurstonae, Scutogyruslongicornis, C. cirratus, C. sclerosus, and C. tilapiae. Higher parasitological indices were observed in colder seasons with lower precipitation. Autumn had the highest parasitic infection values compared to the other seasons. The occurrence of monogenean parasites showed a negative correlation with season, in contrast to the culture stage, in which there was a positive correlation. These results may provide a means for establishing adequate fish farm management to predict periods of high monogenean infestation.
