2001
DOI: 10.1590/s0100-879x2001000800011
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Environmental blue light prevents stress in the fish Nile tilapia

Abstract: The present study aimed to test the effects of blue, green or white light on the stress response of the Nile tilapia, Oreochromis niloticus (L.). Each color was tested on two groups of isolated adult Nile tilapia (8 replicates each): one being subjected to confinement stress, and the other not (control). A different environmental color was imposed on each compartment by covering the light source with cellophane of the respective color (green or blue; no cellophane was used for white light). The intensity of gr… Show more

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Cited by 149 publications
(104 citation statements)
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“…Mean pre-stressor cortisol levels ranged from 41.57 to 65.67 ng/mL (Figure 2), in agreement with other studies. For instance, the baseline described for O. niloticus ranged from ~5 to 60 ng/mL (10,11,17,23,24), and for the related Cichlid, O. mossambicus, it ranged from ~20 to 60 ng/mL (33), and from about 10 to 60 for other fish species (3)(4)(5)(6)19,34).…”
Section: Discussionmentioning
confidence: 99%
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“…Mean pre-stressor cortisol levels ranged from 41.57 to 65.67 ng/mL (Figure 2), in agreement with other studies. For instance, the baseline described for O. niloticus ranged from ~5 to 60 ng/mL (10,11,17,23,24), and for the related Cichlid, O. mossambicus, it ranged from ~20 to 60 ng/mL (33), and from about 10 to 60 for other fish species (3)(4)(5)(6)19,34).…”
Section: Discussionmentioning
confidence: 99%
“…Such modifying factors may be either a non-stressor or inherent to the stressor trait. For instance, sexual maturity (4), environmental color (17,18), heritability (7), age (3), and feeding state (8) are non-stressful conditions that modulate the stress response. On the other hand, intensity and duration are stressor characteristics that affect stress (1,2).…”
Section: Introductionmentioning
confidence: 99%
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“…Blue is known to reduce stress (24) and improve reproduction (16) in Nile tilapia. Water temperature was maintained at 27 ± 1°C by individual thermostats and the photoperiod was 12-h light/dark cycles, starting at 7:00 am.…”
Section: Experiments 2: Sensorial Cues and Stimulation Of Reproductivementioning
confidence: 99%
“…Esta cor aumenta a agressividade ou estresse em peixes territoriais como O. niloticus (FANTA, 1995;MERIGHE et al, 2004), reduz o crescimento em Perca flavescens (HEAD & MALISON, 2000) e evita o aumento dos níveis plasmáticos de cortisol em resposta ao estresse em O. niloticus VOLPATO & BARRETO, 2001), Rhamdia quelen (BARCELLOS et al, 2006), Pagrus pagrus (VAN DER SALM et al, 2004) e Onchorhynchus mykiss (KARAKATSOULI et al 2008). O espectro de luz azul inibe a mobilização de lipídeos hepáticos induzida pelo estresse em O. mykiss (KARAKATSOULI et al, 2008), aumenta a eficiência alimentar em larvas de Melanogrammus aeglefinus (DOWNING & LITVAK, 2001) e favorece o crescimento em Perccottus glenii e Poecilia reticulata, efeito não observado em Carassius carassius (RUCHIN, 2004).…”
Section: Introductionunclassified