Banca de DEFESA: LAIANE LANE LUCENA DE MEDEIROS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : LAIANE LANE LUCENA DE MEDEIROS
DATE: 27/02/2026
TIME: 14:30
LOCAL: Google Meet (https://meet.google.com/xbs-ubcj-eyz)
TITLE:

Spatial and temporal management of artisanal shrimp fishing resources in a tropical region

KEY WORDS:

artisanal fishing; penaeid shrimp; fisheries management; ecosystem modeling; climate change.

PAGES: 195
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Artisanal marine shrimp fishing plays a central role in the economy and food security of coastal communities in northeastern Brazil, especially in the state of Rio Grande do Norte. Despite its high socioeconomic relevance, this activity remains marked by gaps in knowledge about the ecological dynamics of the species exploited, weaknesses in fisheries monitoring, and the absence of specific and territorialized management tools. This scenario is aggravated by intensified fishing pressure and the growing effects of environmental and climate change on coastal ecosystems. Given this context, this thesis aimed to assess the sustainability of artisanal shrimp fishing in Rio Grande do Norte using an integrated approach, combining spatiotemporal analysis of species distribution, ecosystem assessment of future scenarios, and the translation of these results into technical subsidies for the management and planning of the activity. In Chapter 1, the spatial and temporal patterns of distribution, abundance, and recruitment of penaeid shrimp on the eastern coast of Rio Grande do Norte were investigated, with an emphasis on identifying essential habitats for juveniles and adults. The results showed that the distribution of shrimp is not homogeneous along the coast, being strongly influenced by seasonality, proximity to estuaries, and local environmental characteristics. Hotspots of recruitment and differential habitat use between ontogenetic stages and species were identified, especially during the rainy season, highlighting the importance of shallow coastal and estuarine areas for stock maintenance. These findings reinforce the potential of management strategies based on spatial and temporal restrictions adjusted to local dynamics. Chapter 2 adopted an ecosystem approach to assess the isolated and cumulative effects of increased fishing effort and climate change on the structure and functioning of coastal food webs, using Ecopath with Ecosim modeling. A comparison between two contrasting ecosystems, Baía Formosa and Porto do Mangue, revealed that reductions in primary production and increases in water temperature act synergistically with fishing pressure, resulting in significant declines in biomass and catch, with more intense impacts on ecosystems historically degraded by macroalgae blooms. The simulated scenarios indicated distinct sustainable limits for increased fishing effort, highlighting differences in ecological resilience and the need for adaptive and territorialized management strategies in the face of plausible future scenarios. In Chapter 3, the ecological results produced in the previous chapters were integrated into the analysis of the current legal and institutional framework and the technical guidelines developed under the FAO–GEF REBYC II-LAC Project, taking on an applied and public policy-oriented character. Based on this integration, technical recommendations were systematized for the management of artisanal shrimp fishing, including temporal and spatial measures, control of fishing effort, mitigation of environmental impacts, strengthening of monitoring, and promotion of co-management instruments. Together, the results of this thesis demonstrate that the sustainable management of artisanal shrimp fishing in Rio Grande do Norte requires an integrated approach, contributes to the advancement of knowledge about the dynamics of shrimp stocks, and offers concrete subsidies for the construction of more adaptive and participatory management strategies that are aligned with the socio-environmental specificities of the Potiguar coast.

COMMITTEE MEMBERS:
Externa à Instituição - CAROLINA TEIXEIRA PUPPIN GONÇALVES - ICMBio
Presidente - 1545394 - FULVIO AURELIO DE MORAIS FREIRE
Externo à Instituição - PAULO VICTOR DO NASCIMENTO ARAÚJO - IFRN
Interno - 1177742 - RONALDO ANGELINI
Externo à Instituição - WELTON DIONISIO DA SILVA - USP