Insights into organic farming of European sea bass Dicentrarchus labrax and gilthead sea bream Sparus aurata through the assessment of environmental impact, growth performance, fish welfare and product quality

Marco, Patrizia Di; Petochi, T.; Marino, G.; Finoia, María Grazia; Tomassetti, Paolo; Porrello, Salvatore; Giorgi, Gianluca; Lupi, Paola; Bonelli, Antonio; Parisi, Giuliana; Poli, Bianca Maria

doi:10.1016/j.aquaculture.2017.01.012

Cited by 42 publications

(36 citation statements)

References 71 publications

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“…It is shown here that seabass subjected to increasing intensity of (chronic) stress mildly elevate basal plasma cortisol levels (range: 50–200 ng/ml; Figure 2 ) compared to controls; remarkably, basal levels of cortisol in seabass are remarkably high compared to the generally accepted “non-stress” level seen in most fish (up to 20 ng/ml). Seabass is in general characterized by high cortisol values and variation ( 27 , 28 , 39 , 58 , 59 ), and the current results point out that chronic stress can further increase these high (basal) cortisol levels.…”

Section: Discussionsupporting

confidence: 54%

“…These species constitute the largest portion (approximately 90–95%) of the Mediterranean aquaculture production, and have high economic and societal value. They, however, show often enigmatic differences in their physiology ( 27 ), especially the responsiveness and susceptibility to stress ( 28 ) and react differently to an acute stressor, when previously exposed to chronic (crowding) stress ( 29 – 33 ). Moreover, seabream seems more resilient than seabass in terms of growth under stress ( 31 , 32 , 34 ).…”

Section: Introductionmentioning

confidence: 99%

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Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

et al. 2018

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The present study aimed to compare effects of increasing chronic stress load on the stress response of European seabass (Dicentrarchus labrax) and gilthead seabream (Sparus aurata) to identify neuroendocrine functions that regulate this response. Fish were left undisturbed (controls) or exposed to three levels of chronic stress for 3 weeks and then subjected to an acute stress test (ACT). Chronic stress impeded growth and decreased feed consumption in seabass, not in seabream. In seabass basal cortisol levels are high and increase with stress load; the response to a subsequent ACT decreases with increasing (earlier) load. Basal cortisol levels in seabream increase with the stress load, whereas the ACT induced a similar response in all groups. In seabass and seabream plasma α-MSH levels and brain stem serotonergic activity and turnover were similar and not affected by chronic stress. Species-specific molecular neuro-regional differences were seen. In-situ hybridization analysis of the early immediate gene cfos in the preoptic area showed ACT-activation in seabream; in seabass the expression level was not affected by ACT and seems constitutively high. In seabream, expression levels of telencephalic crf, crfbp, gr1, and mr were downregulated; the seabass hypothalamic preoptic area showed increased expression of crf and gr1, and decreased expression of mr, and this increased the gr1/mr ratio considerably. We substantiate species-specific physiological differences to stress coping between seabream and seabass at an endocrine and neuroendocrine molecular level. Seabass appear less resilient to stress, which we conclude from high basal activities of stress-related parameters and poor, or absent, responses to ACT. This comparative study reveals important aquaculture, husbandry, and welfare implications for the rearing of these species.

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

et al. 2018

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“…Concerning crude fat changes, the level found on the first day in fresh fillets (9.27 ± 0.12%) was within the values reported for farmed sea bream (Grigorakis, 2007;Marco et al, 2017). Throughout storage, crude fat content decreased only for the control group, reaching 7.68 ± 0.24% at the end of the storage period while no significant change was detected throughout the storage for coated fillets CH1 and CH2.…”

Section: Proximate Compositionsupporting

confidence: 77%

“…The crude protein content in fresh fillets (19.60 ± 0.13%) was also in the range of values (18.0% to 22.4%) reported for the species (Attouchi & Sadok, 2012;Marco et al, 2017). Up to the 12 th day of storage, crude protein content remained unchanged in all treatments.…”

Section: Proximate Compositionsupporting

confidence: 65%

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Determination of shelf-life of vacuum-packed sea bream (Sparus aurata) fillets using chitosan-microparticles-coating

Khemir

Besbes

Khemis

et al. 2020

CyTA - Journal of Food

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Chitosan-microparticles (CM)-coating (CMC) effect on quality and shelf-life of vacuum-packed sea bream (Sparus aurata) fillets was investigated at 0.2% and0.5% (w/w) doses comparatively to untreated control, during refrigerated storage (24 days). Analysis concerned total mesophilic bacteria counts (TMC), total psychrophilic bacteria counts (TPC), proximate composition, pH, total volatile basic nitrogen (TVB-N), trimethylamine (TMA), thiobarbyturic acid (TBA), and fatty acids (FA). Two-way ANOVA and multiple comparison were applied, factors being storage time and treatment. Bacterial counts exceeded the limit in control but remained below in CMC lots. All of TVB-N, TMA and TBA increased faster and reached higher values in control compared to CMC lots, with dose-dependent effect. CMC preserved quality in terms of proximate composition and FA. The 0.5%-CM dose prolonged the shelf-life up to 12 days, corresponding to a two folds extension. CMC showed antimicrobial and antioxidant properties and should be recommended for preserving the quality of fish fillets.

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Organic Aquaculture: Economic, Market and Consumer Aspects

Gambelli

Naspetti

Zander

et al. 2019

Organic Aquaculture

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Insights into organic farming of European sea bass Dicentrarchus labrax and gilthead sea bream Sparus aurata through the assessment of environmental impact, growth performance, fish welfare and product quality

Cited by 42 publications

References 71 publications

Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

Determination of shelf-life of vacuum-packed sea bream (Sparus aurata) fillets using chitosan-microparticles-coating

Organic Aquaculture: Economic, Market and Consumer Aspects

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