Thermal tolerance and preferred temperature range of juvenile meagre acclimated to four temperatures

Kır, Mehmet; Sunar, Murat Can; Altındağ, Barış Can

doi:10.1016/j.jtherbio.2017.02.018

Cited by 34 publications

(15 citation statements)

References 36 publications

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“…However, few studies have attempted to evaluate biological aspects of fish such as metabolic parameters, like health or welfare when exposed to short‐term temperature variations. Generally, studies on temperature perform the acclimation procedure at a gradual temperature (on average 1°C/day) and evaluate fish status after a long period of exposure to constant temperature (between 15 and 60 days) or do a quick acclimatization (1°C every 1 or 2 hr) and evaluate the fish status in periods between 12 and 24 hr after acclimatization (Dalvi et al, ; Kır, Sunar, & Altındağ, ; Lushchak & Bagnyukova, ; Peng, Cao, & Fu, ). Many studies showed that temperature influences animal physiological parameters such as metabolic rate, specific dynamic action, heart and ventilatory rates and growth (Dalvi et al, ; Frisk, Skov, & Steffensen, ; Frisk, Steffensen, & Skov, ; Jobling, ; Portner & Knust, ).…”

Section: Introductionmentioning

confidence: 99%

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

et al. 2019

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In this study, the influence of temperature variation on the blood and oxidative stress parameters of pacu Piaractus mesopotamicus juveniles was evaluated. Fish were subjected to gradual changes of temperature, over 5 days, by 24°C until reaching to experimental temperatures 18, 21, 24 (control), 27 and 30°C. There were significant differences (p < .05) in glucose and lactate of blood in both the haematological relationships and oxidative stress parameters. Glucose levels increased at 30°C and decreased at 21°C. Lactate levels were highest at 18°C. While the haematocrit was higher at all altered temperatures, haemoglobin levels decreased at 21°C and increased at 30°C, causing alterations in haematimetric indices. In the liver, glutathione‐S‐transferase (GST) activity was reduced at 18°C while antioxidant capacity against peroxyl radicals (ACAP) was highest at 30°C. Thiobarbituric acid reactive substances (TBARS) increased at 18, 21 and 27°C. In the muscle, ACAP decreased at 27 and 30°C and TBARS increased at 30°C. The results indicate that the species shows sensitivity to temperature variations. Accordingly, we conclude that with short‐term temperature variations >3°C, it is possible to induce higher alterations in the observed parameters in pacu juveniles.

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Section: Introductionmentioning

confidence: 99%

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

et al. 2019

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“…The estimated temperature at death (Tdeath) in both trials was below 8 °C (ranging from 7.54 and 7.91 °C). A previous study in meagre reported a loss of equilibrium (LOE) temperature ranging between 11.68 and 13.24 °C [ 26 ]. Such differences in the window of temperature sensitivity could be attributable to the reference endpoint (LOE vs. Tdeath in this study), and the cooling rate (18°C h −1 vs. 0.025 °C h −1 in this study).…”

Section: Discussionmentioning

confidence: 99%

“…This species is considered a stenothermic fish species with optimal temperatures for growth between 23 and 27 °C [ 25 ]. Controlled trials have demonstrated that meagre can better adapt to warm than cold temperatures since meagre was unable to cope with a low temperature shift (from 18 to 12 °C) or temperatures below 10 °C [ 26 ]. As a consequence, high mortalities up to 100% associated with low temperatures were reported in cages located in Eastern Adriatic Sea (Bavčević, personal communication) [ 27 ] and in ponds of Southern Europe (Mazuelos, personal communication).…”

Section: Introductionmentioning

confidence: 99%

Dietary Phospholipids Enhance Growth Performance and Modulate Cold Tolerance in Meagre (Argyrosomus regius) Juveniles

Hachero‐Cruzado¹,

Manchado²

2021

Animals

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Meagre (Argyrosomus regius) is a fast-growing species currently produced in aquaculture. This species is highly sensitive to low environmental temperatures which results in high mortality events during production cycles. In this study, the effects of dietary phospholipids (PLs) on growth and cold tolerance were evaluated. For this purpose, control (CTRL) and PL-enriched diets (three-fold higher levels than CTRL) were supplied to meagre juveniles (12.9 ± 2.5g) for 60 days, and growth was determined using a longitudinal approach. Weight gaining and SGR reduction were significantly different between dietary treatments. Animals fed with the PL-enriched diet were 4.1% heavier and grew 3.2% faster than those fed with the CTRL diet. Survival was higher than 98% in both groups. After finishing the growth trial, animals were submitted to two cold challenges and cold tolerance was evaluated as temperature at death (Tdeath), risk to death and lethal doses (LD) 50 and 90 using the cumulative degree cooling hours 6 h (CD6H). Tdeath ranged between 7.54 and 7.91 °C without statistical differences between dietary treatments. However, risk to death was significantly smaller (0.91-fold lower) and LD50 and LD90 were higher in animals fed with the PL-enriched than those supplied the CTRL diet. To assess the fatty acid (FA) composition of liver and brain in animals fed both diets after a cold challenge, FA profiles were determined in juveniles maintained at 14 °C and challenged at 7 °C. FA amounts increased in the liver of animals challenged at 7 °C. In contrast, several FAs reduced their levels in the PL-enriched diet with respect to CTRL indicating that these animals were able to mobilize efficiently lipids from this organ mitigating the negative effects of lipid accumulation during the cold challenge. In brain, the PL-enriched diet increased DHA level during the cold shock indicating a role in maintaining of brain functions. These results open a new research line that could improve the cold tolerance of meagre through dietary supplementation before winter.

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“…Interestingly, meagre seems to be the fish species having the highest optimal temperature range among the three fish species examined. This fish is usually reared between 14 to 26 • C [84], and the preferred temperature range for rearing juveniles has been suggested to be between 26 and 30 • C [85]. A study investigating the effects of temperature on meagre, in the range of 20 and 26 • C, showed that most temperature-related stress markers were lowest at 26 • C [86].…”

Section: Temperature Effect On Fish Physiologymentioning

confidence: 99%

Mediterranean Aquaculture in a Changing Climate: Temperature Effects on Pathogens and Diseases of Three Farmed Fish Species

et al. 2021

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Climate change is expected to have a drastic effect on aquaculture worldwide. As we move forward with the agenda to increase and diversify aquaculture production, rising temperatures will have a progressively relevant impact on fish farming, linked to a multitude of issues associated with fish welfare. Temperature affects the physiology of both fish and pathogens, and has the potential to lead to significant increases in disease outbreaks within aquaculture systems, resulting in severe financial impacts. Significant shifts in future temperature regimes are projected for the Mediterranean Sea. We therefore aim to review and discuss the existing knowledge relating to disease outbreaks in the context of climate change in Mediterranean finfish aquaculture. The objective is to describe the effects of temperature on the physiology of both fish and pathogens, and moreover to list and discuss the principal diseases of the three main fish species farmed in the Mediterranean, namely gilthead seabream (Sparus aurata), European seabass (Dicentrarchus labrax), and meagre (Argyrosomus regius). We will attempt to link the pathology of each disease to a specific temperature range, while discussing potential future disease threats associated with the available climate change trends for the Mediterranean Sea.

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Thermal tolerance and preferred temperature range of juvenile meagre acclimated to four temperatures

Cited by 34 publications

References 36 publications

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

Dietary Phospholipids Enhance Growth Performance and Modulate Cold Tolerance in Meagre (Argyrosomus regius) Juveniles

Mediterranean Aquaculture in a Changing Climate: Temperature Effects on Pathogens and Diseases of Three Farmed Fish Species

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