Effect of Light Intensity on Initial Survival of Fat Snook (Centropomus parallelus, Pisces: Centropomidae) Larvae

Cerqueira, Vinícius Ronzani; Brügger, André Macedo

doi:10.1590/s1516-89132001000400004

Cited by 17 publications

(10 citation statements)

References 14 publications

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“…This especially applies to visual-feeding larvae (Skiftesvik 1992, Cerqueira & Brugger 2001, Downing & Litvak 2001, Utne-Palm & Stiansen 2002). Recent studies have described the advantage of natural light for the growth of Arcto-Norwegian and coastal Atlantic cod (van der Meeren & Jørstad 2001), while other studies have examined the effect of light on the metabolic rate of other larval fishes (Finn et al 1995c,d, Porter 2001.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Fuel and metabolic scaling during the early life stages of Atlantic cod Gadus morhua

Finn¹,

Rønnestad²,

Meeren³

et al. 2002

Mar. Ecol. Prog. Ser.

151

115

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The simultaneous effect of temperature (5, 7, 10 and 13°C) and light on the rates of oxygen consumption and ammonia excretion of larval and early juvenile Atlantic cod Gadus morhua was examined. Larvae increased their mean dry body mass by 2000 times within 48 d. Instantaneous growth rate exceeded 30% d -1 towards the end of the study period, and proportionality of growth followed a triphasic pattern, during which body water content significantly declined but no inflection could be detected in the metabolic exponents. Data were rigorously tested via Model-I (least squares) and Model-II (geometric mean) regression techniques, and the aerobic metabolic rate was found to scale allometrically with both dry and wet body mass. The metabolic exponent was not affected by increasing temperature, but was significantly decreased by the presence of light (b = 0.88 to 0.89 for light-adapted larvae; b = 0.90 to 0.91 for dark-adapted larvae). The effect of light on small larvae (4 to 7 mm standard length, SL) caused a 30 to 40% increase in metabolic rate, while no effect was observed in larger juveniles (40 to 60 mm SL). Acute temperature acclimation of Atlantic cod of 4 to 60 mm SL (0.04 to 350 mg dry mass) demonstrated normal thermal sensitivity with Q 10 values of 2.4 for dark-adapted larvae and 2.6 for light-adapted larvae. Rates of ammonia excretion also scaled allometrically with wet and dry body mass and showed greater variability in dark-adapted compared to light-adapted larvae. Comparison of the molar rates of ammonia excretion and oxygen consumption revealed that Atlantic cod larvae have a high reliance on amino acids as fuel for energy dissipation. With lipids as the assumed co-substrate, amino acids were estimated to account for 70 to 95% of total substrate oxidation for larvae up to 7 mm SL (first 3 to 4 wk of post-hatch development). Beyond 7 mm SL, the reliance on amino acids as fuel began to decline, but even in juveniles of 40 to 60 mm SL, amino acids still represented the dominant source of fuel. For juveniles of between 10 and 20 mm SL, both the rates of oxygen consumption and ammonia excretion remained unaffected by the presence of food in the gut. For short-term fasted juveniles (35 to 60 mm SL), however, a substantial decline in the rate of ammonia excretion was observed. This indicates that during short-term fasting (8 to 12 h) early juvenile Atlantic cod conserve amino acids, rather than funneling them into the tricarboxylic acid cycle.KEY WORDS: Scaling · Metabolism · Fuel preference · Free amino acid · Q 10 · Temperature · Cod larvae Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 243: [217][218][219][220][221][222][223][224][225][226][227][228][229][230][231][232][233][234] 2002 1975). For the juvenile and adult stages of fishes, however, a general exponent of 0.8 has been proposed (Winberg 1956, Wieser 1995, Clarke & Johnston 1999. Giguère et al. (1988) have proposed that the metabolic rates of larval fishes scale isometrically with incre...

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Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Fuel and metabolic scaling during the early life stages of Atlantic cod Gadus morhua

Finn¹,

Rønnestad²,

Meeren³

et al. 2002

Mar. Ecol. Prog. Ser.

151

115

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“…Light has been correlated with a variety of responses such as growth (Wallace et al 1988;Downing & Litvak 1999), survival (Soderberg 1990;Cerqueira & Brugger 2001), swimming activity (Oppedal et al 2001;Marchesan et al 2005;Johansson et al 2006), cannibalism (Appelbaum & Kamler 2000;Han et al 2005), metabolism (Appelbaum & Kamler 2000), metamorphosis (Puvanendran & Brown 2002), swim bladder inflation (Battaglene et al 1994), and feeding behaviour (Puvanendran & Brown 1998;Noble et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Growth, behaviour and colour changes of juvenile King George whiting (Sillaginodes punctata) mediated by light intensities

Meakin¹,

Qin²

2012

New Zealand Journal of Marine and Freshwater Research

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Light is an important environmental factor regulating physiological processes and ecological activities in fishes. This research aimed to examine the effect of light on the growth, distribution and body colour of juvenile King George whiting (Sillaginodes punctata) when fish were exposed to different light levels under laboratory conditions. In this study, the fish were exposed to three light levels (25, 500, and 1000 lux) in triplicate for two months. Comparisons were made for growth, body colour and behavioural changes between treatments. During the experimental period, there were no statistical differences in specific growth rate, survival, growth efficiency and condition factor between the light levels. Although light did not affect swimming speed or encounter rates, it did influence group flight activity and fish distribution in the tanks. Whiting in low light preferred to spend more time grouped at the bottom of the tank than at medium (500 lux) or high light (1000 lux). Likewise, after having been exposed to low light, whiting exhibited a brighter colour and had fewer body markings and counter-shading than fish in medium and high light intensities. Differences in fish distribution and body colour between medium and high light intensities were not detected. This study offers a new insight into understanding the impact of light on behaviour and body colour of fish, which may contribute to the spatial distribution, predator avoidance and recruitment of fish in inshore coastal waters.

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“…We are going to focus on the experiments were authors found effects on growth. For photoperiod, authors found out that on species such as Salmo salar and Oncorhynchus mykiss, natural changes during the year enhance growth (Cerqueira & Brügger, 2001), (Handeland & Stefansson, 2001), (Taylor et al, 2006). However, species such as Oreochromis niloticus, Pagrus major and Scophthalmus maximus reach the maximum growth under permanent light (24L:0D).…”

Section: Discussion On the Effects Of Environmental Parameters On Fishmentioning

confidence: 99%

“…Contrastingly,, larvae of Plectropomus leopardus present the maximum survival rate at 1000lux (Yoseda et al, 2008). Larvae of Centropomus parallelus present 0% of survival under dark conditions, and a relatively good survival rate from 200 to 2500 lux (Cerqueira & Brügger, 2001). The larvae are also sensitive to the tank color.…”

Section: Discussion On the Effects Of Environmental Parameters On Fishmentioning

confidence: 99%

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Study of requirements and design of sensors for monitoring water quality and feeding process in fish farms and other environments

Boronat¹

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There are many efforts done in the aquaculture to reach its sustainability, although in reality, it is far from being sustainable. Its negative impacts on the environment can be prevented and corrected by the use of sensors, developing precision aquaculture. The water quality affects to the fish performance. The temperature and salinity are some factors that affect to the fish growth. Nevertheless, other factors such as turbidity, photoperiod and dissolved oxygen among other can affect to the fish feeding needs. To adjust the amount of feed needed is crucial to ensure the sustainability of the aquaculture and to increase the economic profit of the facilities. Monitoring the water quality allows estimating the feed needs. However, it is not enough. To monitor the fish behavior, especially during the feeding period can help to adapt the provided feed. Then, if it is so clear that the monitoring can help to the aquaculture production, why we do not see this monitoring systems in the aquaculture facilities? Why in most of the facilities the feed is given manually without considering the fish feeding behavior?Nevertheless, the current price of the sensors for monitoring the fish farms is extremely high. The employed sensors are in most of the cases, the same that are used for oceanography. The proposed systems in the literature only cover some water quality parameters and usually do not consider fish feeding behavior. It is need low-cost sensors suitable for aquaculture monitoring. Those sensors must also be low-energy consumption, easy to use and with the option to include them in a network in order to send the data. Thus, we can use these sensors and sensors network to monitor the activity, to send alarms if it is necessary and to automatize processes. Moreover, including Internet, the data can be seen remotely. The use of those sensors can help to the aquaculture production.In this thesis, we show the study of requirements and design of sensors for monitoring water quality and feeding process in fish farms and other environments. First, we study in detail the requirements of sensors in aquaculture. Then, we show the state of the art of the current sensors for water quality monitoring and for aquaculture monitoring.Following, we present the design and development of some low-cost sensors and their applications in fish farm facilities with open system and recirculating system. Moreover we show a complete system which monitors up to 10 parameters including water quality (temperature, salinity, turbidity and presence of hydrocarbon/oil layer), tank environment (water level, illumination, presence of workers), and fish feeding behavior (shoal swimming depth, estimation of changes on shoal swimming velocity and feed falling). Moreover, it accomplishes the features of low-cost and low energy consumption. The estimated price for proposed system is less than 100€ per tank. In addition, we show the use of some of the aforementioned sensors for automatic adjustment of fish feeding process.Finally, some of the develop...

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Effect of Light Intensity on Initial Survival of Fat Snook (Centropomus parallelus, Pisces: Centropomidae) Larvae

Abstract: ABSTRACT

Cited by 17 publications

References 14 publications

Fuel and metabolic scaling during the early life stages of Atlantic cod Gadus morhua

Fuel and metabolic scaling during the early life stages of Atlantic cod Gadus morhua

Growth, behaviour and colour changes of juvenile King George whiting (Sillaginodes punctata) mediated by light intensities

Study of requirements and design of sensors for monitoring water quality and feeding process in fish farms and other environments

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