Banca de QUALIFICAÇÃO: ÁTILA DANTAS ESCÓSSIA DE MELO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ÁTILA DANTAS ESCÓSSIA DE MELO
DATA : 01/11/2018
HORA: 09:00
LOCAL: Sala de multimídia
TÍTULO:

Dynamics of fish assemblies in temporary mangrove forest ponds.

PALAVRAS-CHAVES:

Seasonnality, diversity, gradient, community ecology

PÁGINAS: 23
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Intertidal mangrove forest play important roles for especies persistence, providing food and shelter from predators for marine and estuarine small fishes. Despite the great progress in knowledge of estuarine and mangrove systems in the last decades, including Americas, little is know about fish community dynamics in these temporary enviroments. Thus, the present study aims for understand how fish species are distributed inside the mangrove forest in temporary ponds along the stuary (spatial dynamics) and along a seasonal cicle (temporal dynamics). So, we work on the following question: Which variables are important in the formation of fish especies assemblies on mangrove ponds? Field expeditions occured from november 2017 to september 2018 on Ceará-Mirim river mangrove (Extremoz, Rio Grande do Norte, Brazil), including sites from mangrove heads to river mouth. We stabilished 17 10m x 10m quadrats distributed along the stuary, which were used as sample units. Our fish collection followed a standized effort. Limnologic variables (pH, salinity and water temperature) were mesured by portable sensors. For the analysis, we consider envirmental parameters and geographic position as independent variables. The limnologic variables indicates the phyisiological tolerance, while geopraphic position represents the acess for potential predators. Community parameters (abundance, richness and diversity) are the dependent variables. 1189 individuals belonging to 10 species, one Cynolebiidae (Kryptolebias hermaphroditus [52%]), one Poecilidae (Poecilia vivipara [24%]), four Gobiidae (Ctenogobius smaragdus [11%], Ctenogobius shufeldti [2%], Ctenogobius boleosoma [2%] and Evorthodus lyricus [3%]) and four Eleotridae (Dormitator maculatus [<1%], Eleotris pisonis [1%], Guavina guavina [4%] e Erotelis smaragdus [<1%]). Spatial gradiente and seasonality were important to limnologic parameters variation. Linear regression showed that pH increased near river mouth, independent of seasonality. Salinity decreased in the rainy season. Developed GLMs showed a significant increased in fish abundance and divesity index (Shannonweaver and Simpson) during the rain season.

MEMBROS DA BANCA:
Externo à Instituição - ALEXANDER CESAR FERREIRA ROMAN - UFC
Interno - 2319234 - GUILHERME ORTIGARA LONGO
Presidente - 983.396.135-53 - HELDER MATEUS VIANA ESPÍRITO-SANTO - INPA