Banca de DEFESA: CLAUDIO NONA MORADO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CLAUDIO NONA MORADO
DATE: 07/11/2025
TIME: 14:00
LOCAL: on-line
TITLE:

Local ecological knowledge of artisanal fishers from the coast of Rio de Janeiro State on anthropogenic influences on the ichthyofauna and the bioecology of two main target species

KEY WORDS:

Artisanal fishing, Anthropogenic actions, Bays, Traditional ecological knowledge, Ichthyofauna, Overfishing, Marine food web, Fisheries resource management

PAGES: 245
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

Local Ecological Knowledge (LEK) of small-scale fishers is essential for understanding changes in coastal environments, contributing to biodiversity conservation, sustainable fisheries management, and the mitigation of socio-environmental problems. This study used LEK to assess temporal changes in fish abundance, identify anthropogenic pressures, analyze shifts in trophic structure (“fishing down marine food web”), and deepen the bioecological understanding of Mugil liza and Micropogonias furnieri in Sepetiba, Ilha Grande, and Guanabara bays (Rio de Janeiro, Brazil). Semi-structured interviews were conducted with 267 fishers from 59 communities using the “snowball” technique. The analyses combined quantitative approaches (univariate statistical techniques) and qualitative approaches (IRAMUTEQ – R Interface for Multidimensional Analysis of Texts and Questionnaires). LEK revealed marked declines in the abundance of ecologically and commercially important species such as Scomberomorus brasiliensis, Scomberomorus cavala, Pomatomus saltatrix, Sardinella brasiliensis, and Epinephelus itajara, as well as reductions in the size of M. furnieri and M. liza, indicating overfishing. The mean trophic level of landed species decreased over the decades, corroborating the “fishing down marine food web” hypothesis. The main anthropogenic drivers cited were industrial pollution, large-scale trawling and purse seine fisheries, and lack of enforcement, with Guanabara Bay showing the most severe impacts due to industrial projects and environmental accidents. LEK also provided novel insights into the biology and ecology of M. furnieri and M. liza, including patterns of reproduction, migration, parasitism, and evidence of resident populations in the Sepetiba Bay. These findings highlight the value of LEK in complementing scientific knowledge, reinforcing the need to integrate small-scale fishers into coastal management, and recommending greater dialogue and collaboration between local communities and environmental authorities.

COMMITTEE MEMBERS:
Externo à Instituição - MAURÍCIO DÜPPRÉ DE ABREU - UFF
Externa à Instituição - CATIA ANTONIA DA SILVA - UERJ
Externa à Instituição - ELLEN MARTINS CAMARA - UFRRJ
Interno - 387200 - FRANCISCO GERSON ARAUJO
Externo à Instituição - José da Silva Mourão - UEPB
Externo ao Programa - 1849562 - MARCIO DE ALBUQUERQUE VIANNA - nullInterno - 1341945 - RAFAEL DE ALMEIDA TUBINO