Banca de QUALIFICAÇÃO: MARCIO JOSE COSTA DE ALBUQUERQUE LIMA JUNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCIO JOSE COSTA DE ALBUQUERQUE LIMA JUNIOR
DATE: 17/02/2023
TIME: 14:00
LOCAL: Remoto
TITLE:

INFLUENCE OF HABITATS ON FISH ASSEMBLIES IN A COASTAL MARINE PROTECTED AREA

KEY WORDS:

BRUV, Ecological connectivity, Conservation, Ichthyofauna.

PAGES: 13
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Many ecologically and economically important fish species for fisheries use diverse habitats in their developmental stages, depending vitally on the connectivity between different ecosystems. In this context, knowledge about the relationships between habitat characteristics and fish assemblage composition is essential for the efficient conservation of coastal marine biodiversity. The present study aimed to evaluate the influence of different marine estuarine habitats on the composition of fish assemblages and, consequently, on the connectivity between environments, and to identify priority habitats for conservation. Collections were carried out between November (2021) and April (2022) in the Reserva Extrativista Marinha Lagoa do Jequiá (RESEX de Jequiá), Alagoas (Brazil). To obtain data on richness and abundance of the ichthyofauna of mangrove estuarine habitats and with sandy, rocky, artificial and coral substrate, Baited Remote Underwater Video (BRUV) were used. In all, 36 samples distributed among the habitats of RESEX de Jequiá were used, and 27 fish taxa from 16 families and 687 individuals were recorded. The coastal reefs stood out significantly, showing higher richness (means: S= 5.7; Nmax=51.8). The other estuarine habitats obtained similar values for richness and abundance. Regarding the occurrence of species, the reef environments had the highest frequency, with 31% (n=31), followed by the mangrove with 24% (n=24). The mangrove had the highest prominence and presence of important species for fishing. The species Anchoa sp. Lutjanus jocu and Caranx latus were the most abundant, being habitat generalists, representing good indicators of ecological connectivity between the estuarine-marine environment. Juveniles of endangered species such as Lutjanus cyanopterus (for estuaries), Sparisoma axillare and S. frondosum (for reefs) were also recorded. The ecological connectivity between the environments was evidenced due to the use of habitats by migrating taxa, revealing the importance of this ecological aspect in the maintenance of local populations. The results achieved are important to encourage management initiatives for estuarine and marine ichthyofauna of RESEX de Jequiá, especially focused on priority habitats for conservation, such as coastal reefs and mangroves, and for endangered species economically important for fishing.

BANKING MEMBERS:
Presidente - 1639893 - CLAUDIO LUIS SANTOS SAMPAIO
Interno(a) - 2269625 - ROBSON GUIMARAES DOS SANTOS
Externo(a) à Instituição - FERNANDA A. ROLIM
Externo(a) à Instituição - TOMMASO GIARRIZZO