Light intensity affects growth and sexual maturation of Atlantic salmon (<i>Salmo salar</i>) postsmolts in sea cages

Oppedal, Frode; Taranger, Geir Lasse; Juell, Jon‐Erik; Fosseidengen, Jan Erik; Hansen, Tom

doi:10.1051/alr:1997038

Cited by 97 publications

(83 citation statements)

References 19 publications

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“…The delayed increase in body mass observed in the continuous light treatment probably reflects the time required for hypertrophy of the muscle fibres produced once the inhibitory effects of short day length are removed. A similar delay in the growth-stimulating effects of continuous light treatment has been observed previously (Oppedal et al, 1997). It has been suggested that the ratio between day/night light intensity is important with respect to the timing and increase in growth rate observed (Steffansson et al, 1991).…”

Section: A Johnston and Otherssupporting

confidence: 80%

“…Endal et al (2000) also reported that holding fish on long days from November to July failed to reduce maturity; indeed, in their study maturity was significantly enhanced. The relationships between the light intensity of the extended photoperiod, growth rate and maturity may be more complex than previously considered (Oppedal et al, 1997).…”

Section: A Johnston and Othersmentioning

confidence: 97%

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Plasticity of muscle fibre number in seawater stages of Atlantic salmon in response to photoperiod manipulation

Johnston

Manthri

Smart

et al. 2003

Journal of Experimental Biology

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SUMMARYAtlantic salmon (Salmo salar L.) were fed to satiety and reared from ∼60 g to 5000 g at ambient seawater temperatures. The effect of photoperiod manipulation on muscle growth was investigated from the start of the first sea winter. Continuous light treatment in winter/spring (1 November to 18 June) improved growth performance in fish, resulting in a 30% increase in mean body mass relative to the ambient photoperiod fish by 12 August, but had no effect on sexual maturation. Significant increases in body mass in the continuous light groups were observed after 126 days (P<0.01). The number of fast muscle fibres per trunk cross-section was determined in a subset of the fish and was 28.5% higher in the continuous light(799×103) than the natural day length(644×103) groups after only 40 days, corresponding to the period of decreasing natural day length. Subsequent rates of fibre recruitment were similar between treatments. At the end of the fibre recruitment phase of growth (combined June and August samples), the maximum number of fast muscle fibres was 23% higher in fish from the cages receiving continuous light(881×103±32×103; N=19) than in the ambient photoperiod cages(717×103±15×103; N=20)(P<0.001). Continuous light treatment was associated with a shift in the distribution of fibre diameters, reflecting the altered patterns of fibre recruitment. However, the mean rate of fibre hypertrophy showed no consistent difference between treatments. There was a linear relationship between the myonuclear content of isolated single fibres and fibre diameter. On average, there were 27% more myonuclei in 150 μm-diameter fibres in the continuous light (3118 myonuclei cm-1) than the ambient photoperiod(2448 myonuclei cm-1) fish. After 40 days, continuous light treatment resulted in a transient increase in the density of myogenic progenitor cells, identified using a c-met antibody, to a level 70% above that of fish exposed to natural light. It is suggested that short days inhibited the proliferation of myogenic progenitor cells and that this was overcome by transferring fish to continuous light, causing an increase in the number of times the myogenic precursor cells divided and/or a decrease in cell cycle time. The net increase in myogenic progenitor cells resulted in proportional increases in the number and myonuclear content of fibres. The subsequent hypertrophy of these additional fibres can explain the delayed increase in body mass observed with continuous light treatment.

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Section: A Johnston and Otherssupporting

confidence: 80%

Section: A Johnston and Othersmentioning

confidence: 97%

Plasticity of muscle fibre number in seawater stages of Atlantic salmon in response to photoperiod manipulation

Johnston

Manthri

Smart

et al. 2003

Journal of Experimental Biology

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“…Our results showed a significant growth enhancing effect of exposure to 24L:0D and 18L:6D regimes in rainbow trout, Oncorhynchus mykiss. The data obtained from this experiment is consistent with that from other experiments on juvenile and adult salmons (Endal et al, 2000;Oppedal et al, 1997;Porter et al, 1999;Sigholt et al, 1997;Taranger et al, 1999).…”

Section: Discussionsupporting

confidence: 90%

“…Continuous additional light has also been used on the Atlantic salmon reared in the sea cages, especially during the spring and winter to enhance growth and delay sexual maturation rate (Taranger et al, 1995;Oppedal et al, 1997;Porter et al, 1999). Photoperiod manipulation applied in fish farming intends to increase the farming efficiency and get the fish to the commercial weight as soon as possible .…”

Section: Introductionmentioning

confidence: 99%

Untitled

Türker¹,

Yıldırım²

2011

Turk. J. Fish. Aquat. Sci.

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Juvenile of rainbow trout (Oncorhynchus mykiss, weight 27.39±0.16 g) were reared under four photoperiods (Light/Dark hour) (11L:13D control group; 24L:0D continuous light group; 18L:6D extended light group and 6L:18D short light group) to examine their growth performance and some feeding parameters in sea water conditions. Fish were fed on a commercial diet until satiation for 8 weeks of the trial. Fish exposed to 24L:0D (continuous light group) had a significantly higher daily growth rate, relative growth rate and specific growth rates followed by 18L:6D, 11L:13D and 6L:18D photoperiods (P<0.05). The results demonstrated that the growth performance and feed utilization of rainbow trout can be stimulated clearly by using a continuous (24L:0D) or extended light (18L:6D) photoperiods in sea water.

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“…Resultados semelhantes a este em que os pesquisadores verificaram uma relação positiva entre exposição à luz contínua crescimento somático e ingestão alimentar. Esta relação foi observada em salmão do Atlântico (OPPEDAL et al, 1997) em bacalhau do Atlântico, Gadus morhua (HANSEN et al, 2001;TARANGER et al, 2006), em Melanogrammusa eglefinus (DAVIE et al, 2007) e Pagrus major (BISWAS et al, 2010) e Sparus aurata (GINÉS et al, 2004).…”

Section: Resultsunclassified

Efeito Do Fotoperíodo No Crescimento, Consumo Alimentar E Qualidade Da Carcaça De Tilápias Invertidas

Navarro

Ferreira

Navarro

2016

ArqVet

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FERREIRA, T. M. S.; NAVARRO, F. K. S. P. Efeito do fotoperíodo no crescimento, consumo alimentar e qualidade da carcaça de tilápias invertidas. Arq. Ciênc. Vet. Zool. UNIPAR, Umuarama, v. 19, n. 2, p. 77-80, abr./jun. 2016. RESUMO:A incidência luminosa pode induzir diversos efeitos sobre o crescimento, alimentação, desenvolvimento e reprodução de peixes. O fotoperíodo é sinal principal para maior influência sobre o ritmo circadiano dos peixes e pode afetar o ganho de peso, a ingestão de alimento e a utilização de energia. O objetivo deste trabalho foi avaliar os efeitos de diferentes regimes de fotoperíodo no crescimento, consumo alimentar e qualidade da carcaça de tilápias invertidas, em um sistema fechado. Foram utilizados 150 alevinos de tilápias invertidas, provenientes da estação de piscicultura. Os peixes foram acondicionados e distribuídos em 15 aquários com a capacidade de 65 litros cada um, em delineamento inteiramente ao acaso, com três tratamentos e cinco repetições. Os tratamentos diferenciarão nas simulações dos fotoperíodos emerais (horas de luz) que durarão T1= 24 horas de escuro, T2= 12 horas de escuro e 12 horas de Luz, T3= 24 horas de luz. Cada peixe foi considerado uma unidade experimental. Não houve diferença significativa para desempenho, mas houve diferença para Índice gonadossomático (IGS). Conclui-se que o fotoperíodo (12L:12E) promove melhor índice gonadossomático em tilápia. Para melhor qualidade de carcaça e desempenho produtivo sugere o fotoperíodo (24L:0E). PALAVRA-CHAVE: Escuro. Fotoperiodo. Oreochomis niloticus. Ritmo biológico. PHOTOPERIOD EFFECT ON GROWTH, FEED INTAKE AND CARCASS QUALITY REVERSED TILAPIAABSTRACT: The light incidence can induce different effects on growth, feeding and development and reproduction of fish. The photoperiod is the main signal for greater influence on the circadian rhythm of the fish and can affect weight gain, feed intake and energy use. This study aimed to demonstrate the effects of different photoperiodic regimes on growth, feed intake and carcass tilapia quality reversed in a closed system. 150 were used fry reversed tilapia, from fish farming station. The fish were packed and distributed in 15 tanks with a capacity of 65 liters each, in a completely randomized design with three treatments and five repetitions. Treatments differentiate in the simulations of emerais photoperiod (light hours) that will last T1 = 24 hours dark, T2 = 12 hours of darkness and 12 hours light, T3 = 24 hours of light. Each fish was considered an experimental unit. There was no significant difference in performance, but there were differences for IGS. I conclude that the photoperiod (12L: 12D) promotes better GSI in tilapia. To better carcass quality and growth performance suggests the photoperiod (24L: 0D). KEYWORDS: Biological rhythm. Dark. Oreochomis niloticus. Photoperiod. EFECTO DE FOTOPERIODO EN EL CRECIMIENTO, CONSUMO ALIMENTAR Y CALIDAD DE CAPARAZÓN DE TILAPIAS INVERTIDASRESUMEN: La incidencia de luz puede inducir diversos efectos sobre el crecimiento, alimentación...

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Light intensity affects growth and sexual maturation of Atlantic salmon (Salmo salar) postsmolts in sea cages

Cited by 97 publications

References 19 publications

Plasticity of muscle fibre number in seawater stages of Atlantic salmon in response to photoperiod manipulation

Plasticity of muscle fibre number in seawater stages of Atlantic salmon in response to photoperiod manipulation

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Efeito Do Fotoperíodo No Crescimento, Consumo Alimentar E Qualidade Da Carcaça De Tilápias Invertidas

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