Growth performance and product quality of meagre (<i>Argyrosomus regius</i>) fed diets of different protein/lipid levels at industrial scale

Fountoulaki, Eleni; Grigorakis, Kriton; Kounna, Christiana; Rigos, George; Papandroulakis, Nikos; Diakogeorgakis, John; Kokou, Fotini

doi:10.1080/1828051x.2017.1305259

Cited by 30 publications

(28 citation statements)

References 32 publications

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“…The inclusion of dietary protein at the highest level (520g/kg) slightly improved the lipid accumulation in both the liver and intestine, in agreement with the growth data. Such an improvement with higher protein levels has also been reported in meagre (Fountoulaki et al, ). Interestingly, higher protein levels (520g/kg) were also found to improve the levels of ceruloplasmin, an acute phase hepatic protein involved in immune response (Hellman & Gitlin, ), compared to the 470g/kg levels in our previous study (Henry & Fountoulaki, ).…”

Section: Discussionsupporting

confidence: 68%

“…Moreover, the liver fat accumulation was also verified by the histological assessment of the tissue, in which was found an increase in the size and nucleus dislocation of hepatocytes with increasing dietary lipid levels. When dietary lipid or energy exceeds the capacity of the hepatocytes to oxidize fat, the accumulation of lipid vacuoles occurs within the cells that dislocates the cell nucleus, a phenomenon known as steatosis, observed often in aquaculture species (Caballero et al, ; Fountoulaki et al, ; Kokou et al, ; Sitjà‐Bobadilla et al, ). Such an effect due to dietary imbalances can also occur in the intestine, with an accumulation of lipidic vacuoles within the enterocytes; this was observed in studies using plant meal‐based diets for gilthead seabream (Kokou et al, ; Sitjà‐Bobadilla et al, ) and different lipid sources for rainbow trout (Caballero et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…When dietary lipid or energy levels exceed oxidation capacity, deposition of lipid in vacuoles occurs, a morphological pattern known as steatosis, mainly in the liver, but also can cause accumulation of lipid droplets in the enterocytes. This has been documented in several fish species such as the rainbow trout, Oncorhynchus mykiss (Caballero et al, ), the gilthead seabream (Caballero et al, ) and the meagre, Argyrosomus regius (Fountoulaki et al, ). Thus, it is crucial to determine the optimum dietary protein‒to‒lipid ratio to obtain better physiological condition and health status for fish.…”

Section: Introductionmentioning

confidence: 86%

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Optimum protein-to-lipid ratio requirement of the juvenile shi drum (Umbrina cirrosa) as estimated by nutritional and histological parameters

et al. 2018

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The shi drum, Umbrina cirrosa, is considered quite promising candidate and emerging alternative Mediterranean aquaculture species to the dominant, European seabass, Dicentrarchus labrax, and gilthead seabream, Sparus aurata, due to its high growth rate and feed efficiency (Segato, Corato, Fasolato, & Andrighetto, 2005). Shi drum feeds mainly on invertebrates and fish (Abellan & Basurco, ), suggesting that this species has high protein requirements. Moreover, the shi drum has a good adaptation capacity to culture conditions and, unlike the winter reproducers seabass and seabream, it is a spring-summer reproducer (Mylonas et al., 2004), thus providing a good species to grow in parallel with the existing cultivated species. Shi drum is a demersal fish, member of the Sciaenidae family (Nelson, Grande, & Wilson, 2016), living on the sandy bottom of maximum 100 m depth, and is distributed all around the Mediterranean Sea area, including the Black Sea. The size of the shi drum during catch is usually around 50-60 cm, but it can reach up to 1 m length and 12 kg weight (Mylonas et al., 2000a). In aquaculture settings, this species can achieve a weight of 500 g in only 15 months, which is near twice the growth rate of seabass and seabream (Fabi & Fiorentini, 1993; Mylonas et al., 2000b), thus making the shi drum a very attractive species for aquaculture. AbstractThe shi drum is an emerging Mediterranean aquaculture species that has gained increasing interest in recent years. However, the nutrient requirements of this species remain to be determined to optimize its culture. The present study evaluated the effects of dietary protein (470g/kg or 520g/kg) to lipid ratios (100g/kg, 150 or 200g/ kg) on the growth performance, nutrient utilization and tissue morphology of the shi drum (7 g average initial weight). Dietary protein levels positively correlated with weight gain, showing high protein demands (>470g/kg) for this species. Nonetheless, dietary lipid levels negatively affected growth rate, feed intake and efficiency, and protein utilization, suggesting that this macronutrient cannot be efficiently utilized in high concentrations (>100g/kg). Histological evaluation revealed fat accumulation within the hepatocytes and the enterocytes with increasing dietary lipid levels, starting from 150g/kg lipid inclusion. Overall, our results confirm the high dietary protein requirements of the shi drum (>470g/kg for fish of 7 g initial weight) and suggest that lipid levels should not exceed 100g/kg of inclusion in the diets as this species has a low tolerance to this macronutrient. K E Y W O R D Sdiversification, emerging aquaculture species, feed utilization, growth performance, histological score, nutrient requirements | 445 KOKOU et al.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

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Optimum protein-to-lipid ratio requirement of the juvenile shi drum (Umbrina cirrosa) as estimated by nutritional and histological parameters

et al. 2018

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“…This species is characterized by a high tolerance to wide ranges of salinity (5–55‰) (Mohammed‐Geba et al, ) and temperature (13–28°C) (Fountoulaki et al, ). However, to maximize meagre growth in a short period, aquaculturists seek to provide the best nutritional requirements in an ideal and healthy environment (Lisboa et al, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of salinity level on the survival, growth, feed utilization, carcass composition, haematological and serum biochemical changes of juvenile Meagre (Argyrosomus regius) (Asso, 1801) grown in ground saltwater

et al. 2019

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A study was performed to examine the effects of salinity on water quality, fish performance, carcass composition and haemato‐biochemical parameters in juvenile meagre, Argyrosomus regius. Fish (5.0 g) were stocked in fibreglass tanks at four salinity levels: 8‰, 16‰, 24‰ and 32‰, and fed a pelleted diet (47/17 protein/lipid) for 56 days. Results indicated that the growth, feed utilization, carcass composition and haemato‐biochemical parameters of meagre gradually improved with the increase in salinity up to 24‰ and then significantly (p ≤ .05) decreased at 32‰. The survival per cent showed a significant decrease when A. regius exposed to 8‰ salinity. An improvement with 32%, 47% and 34.1% of FCR, protein productive value and energy utilization was detected at 24‰ compared with 8‰ salinity respectively. The highest content of protein and the lowest of lipids were recorded in fish carcass at 24‰ compared with the opposite trend at 8‰ salinity. The 24‰ salinity treatment exhibited the highest value of haemoglobin (4.9 g/dl) and the lowest ratio (0.73) of albumin/globulin. The serum total protein, albumin and globulin were significantly higher at 24‰ and 32‰ salinity than those at 8‰ and 16‰ salinity groups. These findings indicate that 24‰ salinity level might be the best for meagre.

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“…Several studies have demonstrated that meagre is a strong candidate for the European aquaculture diversification due to its high commercial value and suitability for intensive production (Cardeira et al, ; Chatzifotis et al, ; Poli et al, ; Ribeiro et al, ; Roo et al, ; Saavedra et al, ; Schiavone, Zilli, Storelli, & Vilella, ). Moreover, meagre has high larval survival rates, excellent biological performances (~1 kg/year), and more importantly, high resistance to captivity and environmental stress such as temperature and salinity conditions (Fountoulaki et al, ).…”

Section: Introductionmentioning

confidence: 99%

Reduction of skeletal anomalies in meagre (Argyrosomus regius, Asso, 1801) through early introduction of inert diet

et al. 2019

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The consolidation of meagre (Argyrosomus regius) in aquaculture requires an understanding and optimization of larval rearing and nutritional conditions. The aim of this study was to analyse the effects of an early introduction of inert diets during larval rearing, on growth performance, digestive enzymes activity and development of skeletal anomalies. This study evaluated the effects of three different timings for the introduction of inert diet during larval rearing: a control group (CTRL) where inert diet was initiated at 14 days after hatching (DAH) and two treatment groups that had an earlier introduction of inert diet at 8 DAH (T1) and 11 DAH (T2). Meagre larvae exhibited similar pancreatic and intestinal enzymatic activities among the different dietary treatments. No differences in the overall prevalence of anomalies were observed between treatments at 25 or 50 DAH, however, a significant reduction was observed in all groups with the transition from larval to juvenile stage. The precocious introduction of inert diet shifted the distribution of vertebral anomalies to a more anterior vertebral column region. Altogether, this study shows that earlier introduction of inert diets in meagre hatcheries can be beneficial for meagre production in aquaculture.

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Growth performance and product quality of meagre (Argyrosomus regius) fed diets of different protein/lipid levels at industrial scale

Abstract: View related articles View Crossmark data Citing articles: 8 View citing articles Growth performance and product quality of meagre (Argyrosomus regius) fed diets of different protein/lipid levels at industrial scale

Cited by 30 publications

References 32 publications

Optimum protein-to-lipid ratio requirement of the juvenile shi drum (Umbrina cirrosa) as estimated by nutritional and histological parameters

Optimum protein-to-lipid ratio requirement of the juvenile shi drum (Umbrina cirrosa) as estimated by nutritional and histological parameters

Effects of salinity level on the survival, growth, feed utilization, carcass composition, haematological and serum biochemical changes of juvenile Meagre (Argyrosomus regius) (Asso, 1801) grown in ground saltwater

Reduction of skeletal anomalies in meagre (Argyrosomus regius, Asso, 1801) through early introduction of inert diet

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