Trophic ecology and physiological biomarkers of two species of fish belonging to different trophic guilds (omnivorous and carnivorous) associated to cage fish farms

• Grant number: 18/01117-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): December 01, 2019
• Effective date (End): February 28, 2023
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Principal Investigator: Igor Paiva Ramos
• Grantee: Bruna Caroline Kotz Kliemann
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated scholarship(s): 22/00839-0 - Trophic ecology and isotopic and physiological biomarkers of two species of fish belonging to different trophic guilds (omnivorous and carnivorous) associated with cage fish farms, BE.EP.DR

Abstract

Currently, national public policies encourage the substitution of extractive fisheries for aquaculture activities, whose annual growth rate in Brazilian territory is the highest among zootechnical activities. However, the implementation and management of this activity can influence the aquatic ecosystem, acting as a source of secondary energy through leftover rations, dead fish and metabolites, and may cause changes in the structure of local communities. There are studies that demonstrate the feeding alteration of wild fish associated to fish farms, however, little is known about the biological effects of the consumption of fish remains on the wild fish fauna of Brazilian reservoirs. The objective of this proposal is to evaluate the influence of Oreochromis niloticus fish farms in trophic ecology (consumption and assimilation through stable isotopes) and in the metabolic aspects of two species of wild fish, in the Ilha Solteira Reservoir, SP. Thus, food and physiological aspects of two species of wild fish belonging to different trophic guilds, associated to three fish farming systems and two areas without the influence of this type of aquaculture activity, will be evaluated. Four samplings will be performed in the 24-month period. The collection period was determined considering the feed conversion rate of the fish in cultivation throughout the year. The results obtained with this research may contribute to the planning and mitigation of the impacts of this economic activity, aiming to indicate and characterize the effects on the aquatic system involving biological communities and abiotic variables. (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)

JULIA KAORI KURIYAMA RAMOS; NATÁLIA LUIZA DA SILVA; VINICIUS CESAR DO BONFIM; BIANCA YUNES FORNARI; BRUNA CAROLINE KOTZ KLIEMANN; CIBELE DIOGO PAGLIARINI; HELENO BRANDÃO; IGOR PAIVA RAMOS. Caracterização da dieta e guilda trófica de peixes silvestres em área protegida. Acta Limnol. Bras., v. 34, 2022-06-03. (18/01117-2)

Academic Publications

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

KLIEMANN, Bruna Caroline Kotz. Trophic ecology and isotopic and physiological biomarkers of wild fish species associated with cage fish farms. 2023. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Biociências. Botucatu Botucatu.