Navegando por Autor "OLIVEIRA, Rory Romero de Sena"

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Acesso aberto (Open Access)
Biometric relationships between body size and otolith size in 15 demersal marine fish species from the northern Brazilian coast
(Instituto Nacional de Pesquisas da Amazônia, 2019-12) OLIVEIRA, Rory Romero de Sena; ANDRADE, Marcelo Costa; MACHADO, Fabiola Seabra; CUNHA, Élida Jesana Santana; FREITAS, Flaviane Souto de; KLAUTAU, Alex Garcia Cavalleiro de Macedo; GIARRIZZO, Tommaso; SAINT-PAUL, Ulrich
The relationships between fish size and sagitta otolith measurements were calculated for the first time for 15 species belonging to six families from the northern Brazilian coast. A total of 220 fish were sampled from the bycatch landed by the bottom-trawl industrial shrimp-fishing fleet between August and September 2016. All species had strong relationships between otolith measurements and fish total length with the coefficient of determination (r 2) ranging between 0.71 and 0.99. The variable most strongly related to fish total length was found to be the sagittal otolith length (OL) with 98% of the variability. These relationships are a useful tool to estimate length and mass of preyed fish from otoliths found in stomach contents of marine predators.
Acesso aberto (Open Access)
Distribuição espaço-temporal da ictiofauna de poças de maré de um estuário amazônico: interação de fatores
(Universidade Federal do Pará, 2012-02-28) OLIVEIRA, Rory Romero de Sena; GIARRIZZO, Tommaso; http://lattes.cnpq.br/5889416127858884
The intertidal rockpool ichthyofauna has been studied for several years in temperate and tropical regions at the Pacific Coast, however, in Brazil, the knowledge about it is still incipient. The aim of the present study was to investigate the fish assemblages in tidepools located in three different habitats: rocky outcrop, mangrove forest and salt marsh, at Areuá Island, Curuçá river estuary, North Brazil. Samples were taken quarterly from February 2009 to November 2009, during the spring tide, following a standardized methodology. The physicochemical parameters changed along a topographic gradient and were responsible for the spatio-temporal distribution of fish fauna at rocky outcrop tidepools. Salinty, mean depth and substrate heterogeneity were the parameters that more explained the variations in fish fauna distribution A clear segregation of fish assemblages was found between the tidepools of rocky outcrop and vegetated habitats (tideools in mangrove forest and saltmarsh). These findings suggest that the fish fauna has preferences for some habitats influenced by environmental variables and substrate heterogeneity. However, more researches should be conducted taking into account inter-and intra-specific relationships.