Luisa María Vera

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In the wild, water temperature cycles daily: it warms up after sunrise, and cools rapidly after sunset. Surprisingly, the impact of such daily thermocycles during the early development of fish remains neglected. We investigated the influence of constant vs daily thermocycles in zebrafish, from embryo development to sexual differentiation, by applying four(More)
In the underwater environment, the properties of light (intensity and spectrum) change rapidly with depth and water quality. In this article, we have described how and to what extent lighting conditions can influence the development, growth, and survival of zebrafish. Fertilized eggs and the corresponding larvae were exposed to different visible light(More)
Behavioral rhythms of the Nile tilapia were investigated to better characterize its circadian system. To do so, the locomotor activity patterns of both male and female tilapia reared under a 12:12 h light-dark (LD) cycle were studied, as well as in males the existence of endogenous rhythmicity under free-running conditions (DD and 45 min LD pulses). When(More)
The wide variety of problems in fish ethology ranges from small larva motion analysis to open water tracking of big adult fish. In order to cover this variety of problems, and to develop a new systematic way to tackle them, it is necessary to perform an adequate classification attending to their properties. In this paper, we define a new taxonomy for visual(More)
Sea bass change their feeding rhythms from diurnal to nocturnal in winter, returning to diurnal feeding in spring. Despite behavioral data, the physiological changes that take place during such changes remain unexplored. In this paper, blood glucose rhythms of European sea bass with diurnal/nocturnal self-feeding rhythms were investigated during phase(More)
Seabass is a fish species with dual (diurnal/nocturnal) feeding behavior, although little is known about changes in its molecular clock, physiology and metabolism linked to this dual behavior. In the research described here possible differences in clock gene expression in central (brain) and peripheral (liver) oscillators, and in physiology (blood glucose(More)
(Oncorhynchus mykiss) and the effect of prolonged exposure to continuous 2 illumination on daily rhythms of per1, clock, and aanat2 expression 3 4 Abstract 17 It is widely held that the development of the circadian system during embryogenesis is 18 important for future survival of an organism. Work in teleosts has been, to date, limited to 19 zebrafish,(More)
The effect of temperatures from 5 degrees to 40 degrees C on EEG amplitude, evoked potentials amplitudes to optical stimuli and latencies of components of evoked potential in lizard Lacerta galloti, have been studied, by means of chronically implanted electrodes in dorsal and medial telencephalic cortex. Evoked responses show with greater amplitude in the(More)
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