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Diel rythms in coastal temperate fishes at the OBSEA

2014; Technological Development Center for Remote Acquisition and Data Processing System; Issue: 17 Linguagem: Inglês

1697-2562

Jacopo Aguzzi, G M Wild Santamaría, Joaquín del Río Fernández, Francesc Sardà, Marc Nogueras Cervera, Antonio Manuel Lázaro,

Isotope Analysis in Ecology

We used for the first time a coastal cabled observatory (OBSEA, www.obsea.es) to video-monitor activity rhythms of different fish species within an artificial reef area at a high frequency (30 min). Fish counts were continuously obtained at day and night during one month and compared with the corresponding solar irradiance data. A significant (p < 0.05) 24-h patter in counts was observed in the majority of recognized taxa by periodogram analysis. Three types of rhythms were identified in waveform analysis: Dirunal, nocturnal, and crepuscular.