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- W1990354467 abstract "Four experiments were performed to determine the effects of light intensity on the growth and survival of sea bass larvae; two experiments dealt with the photoperiod and two with the combined effects of light intensity and the photoperiod. Recently hatched larvae from the same spawning were used within each experiment. The light intensity experiments show that there is better growth but poorer survival at higher light intensities. The photoperiod experiments show a better growth at 18 h photoperiod and a better survival at 12 h exposure to light. The study of the combined effects of light intensity and photoperiod confirmed the hypothesis that strong light intensities are lethal to newly hatched larvae (with no pigmentation). If the light intensity is lowered during the first week, the best rearing conditions were found to be continuous lighting relative to survival rate, and 14–16 h photoperiod relative to growth. Huit expériences ont été menées sur les effects de la lumière sur la croissance et la survie des larves de bar de l'éclosion à 1 mois: quatre expériences sur l'intensité lumineuse, deux expériences sur la photopériode et deux expériences sur l'action combiněe de l'intensité lumineuse et de la photopériode. Dans chaque expérience, des larves issues de la même ponte ont été utilisées. Les plus fortes intensités lumineuses donnent la meilleure croissance, mais aussi la plus faible survie. Les expériences sur la photopériode donnent une meilleure croissance pour une photopériode de 18 heures et une meilleure survie pour une photopériode de 12 heures. La combinaison photopériode-intensité lumineuse confirme l'hypothèse que les fortes intensitées lumineuses sont léthales pour les larves juste écloses (non pigmentées). L'éclairage doit être réduit (700 lux) durant la première semaine; par la suite, une lumière continue (2,000 lux) favorise la survie et une photopériode de 14 à 16 heures améliore la croissance." @default.
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- W1990354467 date "1979-08-01" @default.
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- W1990354467 title "Some effects of light intensity and photoperiod on the sea bass larvae (Dicentrarchus labrax (L.)) reared at the Centre Oceanologique de Bretagne" @default.
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- W1990354467 doi "https://doi.org/10.1016/0044-8486(79)90086-3" @default.
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