Abstract
The animals have anatomical and physiological structures influenced by luminosity. In fish, the pineal gland cells contain photoreceptors and the suprachiasmatic nucleus seems to be involved in biological rhythm just like in other vertebrates. This work aims to describe the role of luminosity and day periods in Danio rerio's Light/Dark preference. For this purpose 160 naive adult undetermined sex Zebrafish were divided into 5 groups of 32 subjects and kept in isolated aquaria with light control. Afterwards, each fish was tested in the Light/Dark aquaria, with water column of 5 centimeters.
Highlights
The Ponta Negra beach, located in the municipality of Natal, Rio Grande do Norte, hosts a great diversity of fish species of economical and ecological importance
A ordem Perciformes teve maior representação, com seis famílias (Centropomidae, Carangidae, Sciaenidae, Ephippidae, Scombridae e Trichiuridae), com oito espécies diferentes de peixes marinhos
Summary
The Ponta Negra beach, located in the municipality of Natal, Rio Grande do Norte, hosts a great diversity of fish species of economical and ecological importance. No presente trabalho foi registrada a ocorrência dos peixes marinhos que não foram contemplados no estudo anterior (GURGEL et al, 2012).
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