Diet, helmintofauna and metabolic aspects of Oreochromis niloticus from cage fish farms escapes

• Grant number: 16/23468-6
• Support Opportunities: Scholarships in Brazil - Master
• Effective date (Start): June 01, 2017
• Effective date (End): February 28, 2019
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Igor Paiva Ramos
• Grantee: Cibele Diogo Pagliarini
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated scholarship(s): 18/08164-6 - Parasites, metabolic parameters and trophic ecology of Oreochromis niloticus cultivated and wild, from Grande River, Brazil, BE.EP.MS

Abstract

Brazilian aquaculture has been showing increased production and rapid financial returns, with Nile tilapia being the most produced species, with approximately 260 thousand tons / year. Specifically, the West of the State of São Paulo is responsible for about 1,500 t / month, with the Ilha Solteira reservoir, estimated production potential at 30,000 t / year. However, the environmental influences of this activity are not yet fully elucidated. Thus, the objective of the present proposal is to characterize the diet, parasitofauna and muscle metabolic factors of O. niloticus from escapes of cage fish farming in the Ilha Solteira reservoir, SP. The fish from escapes and wild will be collected with the aid of casting net and gill nets, while those coming from captivity with the help of sieve. The fish will be euthanized and the skin mucus collected for parasitological analysis. Subsequently, the stomachs will be removed and fixed in 4% formalin solution and muscle tissue will be collected, kept in liquid nitrogen at the time of collection and kept in ultrafeezer -80ºC until the moment of the metabolic analyzes. After all the samples of O. niloticus will be individualized in plastic bags and kept frozen until the moment of the laboratory analyzes. In the laboratory the stomach contents will be analyzed under stereomicroscope and the food items identified and quantified. Also, the collection of endohelminths will be performed for parasitological analysis. Afterwards, the results for diet, parasitological and muscle metabolic aspects will be compared between culture specimens and specimens from escapes. For analysis of dietary and parasitological data, the two-way Permanova will be used to evaluate differences between groups and SIMPER in order to verify the contribution of each food item and parasite species to difference, if observed. Also for diet, specialization of the diet and food overlap with wild species adjacent to the cage fish farming will be evaluated through niche overlap analysis and PERMDISP. For the metabolic analyzes will be used analysis of variance. All statistical analyzes will be performed using the program Primer 6.0 + Permanova, RStudio and EcoSim® 7.0 and the level of significance adopted will be p <0.05. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PAGLIARINI, CIBELE DIOGO; FRANCESCHINI, LIDIANE; RIBEIRO, CRISTIELE DA SILVA; DELARIVA, ROSILENE LUCIANA; DE ARRUDA AMORIM, JOAO PAULO; RAMOS, IGOR PAIVA. Dolops carvalhoi como vetor de Epistylis sp. entre espécimes cultivados e silvestres de Oreochromis niloticus no Brasil. Revista Brasileira de Parasitologia Veterinária, v. 28, n. 2, p. 325-329, APR-JUN 2019. (16/23468-6)

IGOR P. RAMOS; CIBELE D. PAGLIARINI; LIDIANE FRANCESCHINI; REINALDO J. DA SILVA. Metacercariae of Austrodiplostomum compactum (Trematoda, Diplostomidae) in non-native fish species in Brazil: a possible explanation for the high rate of parasitic infection. Anais da Academia Brasileira de Ciências, v. 92, 2020-09-14. (16/23468-6)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PAGLIARINI, Cibele Diogo. Dieta, metabolic and parasitological aspects of Oreochromis niloticus cultivated and wild, in the reservoir of Ilha Solteira, from Grande river, SP. 2019. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Biociências. Botucatu Botucatu.