Effects of photoperiod on juvenile growth and smolting of Atlantic salmon and subsequent survival and growth in sea cages

Saunders, Richard L.; Henderson, Eugene B.; Harmon, Paul R.

doi:10.1016/0044-8486(85)90257-1

Cited by 142 publications

(73 citation statements)

References 18 publications

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“…At two week intervals, from 4th October, 15 randomly selected individuals per treatment were exposed to a 96h seawater (37.5 ppt) tolerance test (Saunders et al, 1985) and mortalities recorded. On 4th January 2001, 100 non-tagged individuals per treatment group were killed and dissected to quantify internal signs of maturation i.e.…”

Section: Methodsmentioning

confidence: 99%

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Berrill

Porter

Smart³

et al. 2003

Aquaculture

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Current Atlantic salmon farming practice induces early smoltification with artificial photoperiod regimes, however the importance of these photoperiods on parr maturation and interactions with smoltification are poorly understood. These questions were addressed in the present investigation, which examined the effects of photoperiod manipulation on the development, maturation and smoltification of individually tagged parr.

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Section: Methodsmentioning

confidence: 99%

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Berrill

Porter

Smart³

et al. 2003

Aquaculture

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“…Second, the composition of wild and commercial feeds differs, especially in the proportions of terrestrially sourced nutrients important for proper development (Naylor et al, 2009). Third, hatcheries often use continuous light to enhance growth and suitability for sea-cage transfer (Saunders et al, 1985), which can affect physiology and development (Oppedal et al, 2003). Finally, temperature fluctuations within hatcheries may influence vaterite formation (Sweeting et al, 2004), which may be particularly important in early life (Wargelius et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Rapid growth causes abnormal vaterite formation in farmed fish otoliths

Reimer

Dempster

Wargelius

et al. 2017

Journal of Experimental Biology

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Sagittal otoliths are essential components of the sensory organs that enable all teleost fish to hear and maintain balance, and are primarily composed of calcium carbonate. A deformity, where aragonite (the normal crystal form) is replaced with vaterite, was first noted over 50 years ago but its underlying cause is unresolved. We evaluated the prevalence of vateritic otoliths from two captive rearing studies which suggested that fast growth, due to environmental rather than genetic control, led to vaterite development. We then tested this by varying light and temperature to create phenotypes with different growth rates, which resulted in fast growers (5 times larger) having 3 times more vaterite than slow growers. A decrease in either the ratio of otolith matrix proteins (otolin-1/OMM-64) or [Ca 2+ ]/[CO 32− ] may explain why fast growth causes vaterite deposition. As vaterite decreases hearing sensitivity, reducing growth rates in hatcheries may improve the welfare of farmed fish and increase the success of conservation efforts.

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“…The present finding was similar to the work carried out by Tandler and Helps (1985); Folkvord and Ottera (1993); Imsland et al (1995); Duncan et al (1999); Ergün et al (2003); Rad et al (2006); Yager and Yigit (2009) and Kashyap et al (2015) in various fish species, their reports also suggested that the fishes subjected to continuous photoperiod obtained highest growth. A number of workers such as Saunders and Henderson (1970); Lundqvist (1980);Brauer (1982); Saunders et al (1985) reported that artificially increased day light is the good source for the enhancement of growth and development of fishes. In contrary to this, Arvedlund et al (2000) reported slow growth under 24 L: 0 D as compared to 16 L: 8 D photoperiod regime in Amphiprion melanopus and emphasized that their developing juveniles had a period of inactivity during darkness and their growth was compromised.…”

Section: Discussionmentioning

confidence: 99%

“…The other factors affected growth of fish were found to be feeding rate, feed, water quality, stock density and size (Trzebiatowwski et al, 1981). The optimum photoperiod can successfully be used to raise the yield of fish in aquaculture was concluded by many workers such as Saunders and Henderson (1970); Lundqvist (1980); Brauer (1982) and Saunders et al (1985) who worked on relationship between photoperiod and growth rate in fishes. Ruchin (2004Ruchin ( , 2006 investigated the influence of colour light on growth performance of Carassius carassius, and also on the effect of light on white blood cell count in Cyprinus carpio.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Bano¹,

Serajuddin²

2018

Turk. J. Fish. Aquat. Sci.

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The influence of different photoperiods was studied on the growth and behaviour of the giant gourami, Trichogaster fasciata. Fish (weight=1.1g; length=4.36cm) were subjected to photoperiod regimes of 0L:24 D, 8L:16 D, 12L:12 D and 16L:8 D for 90 days in triplicates. The growth rate was highest (weight=4g) and lowest (weight=2.36g) in the groups subjected to 16L: 8D and 0L: 24D photoperiods respectively. The mean body weight and mean total length were significantly higher (P<0.05) while standard length and caudal fin length (P>0.05) were not significant in the 16 hours light. Mean values of food conversion ratio and condition factor were lowest while various growth parameters were found to be maximum in the 16 hours light. 16L:8D photoperiod regime produced pronounced effects on the welfare of giant gourami as shown by the nonintrusive welfare indicators. The photoperiodic signals were found to be capable of modifying the behavioural activities where male aggression related to territory or defence and female selection were reduced in control group. The optimum photoperiod (16 L: 8 D) was an environmental cue for the better growth, welfare and behaviour.

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Effects of photoperiod on juvenile growth and smolting of Atlantic salmon and subsequent survival and growth in sea cages

Cited by 142 publications

References 18 publications

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Photoperiodic effects on precocious maturation, growth and smoltification in Atlantic salmon, Salmo salar

Rapid growth causes abnormal vaterite formation in farmed fish otoliths

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