Improved conservation of gilthead seabream (Sparus aurata) in ice storage. The influence of doses of rosemary extract added to feed

Two farmed fish species of great importance in the European market, gilthead seabream ( Sparus aurata; GSB) and seabass ( Dicentrarchus labrax; SB) reared in different conditions were analysed to determine the best index to be used for calibration of a prototype designed for rapid measurement of freshness in ice stored fish. Sensory evaluation (quality index) was related to K-value (percent of the ratio of inosine plus hypoxanthine to adenosine-5-triphosphate (ATP) and breakdown products) and Torrymeter readings, chosen as indices that detect early changes in the ice stored fish. Higher K-values were obtained in SB than in GSB, however the degradation of ATP and derivatives followed the same pattern in the different lots in each species. No statistical differences in the evolution of K-value for the same storage time were observed, irrespective of the amount of ATP and breakdown products, muscle composition and rearing conditions of the fish. K-value correlated strongly with storage time and sensory evaluation measured in the raw fish, however, correlation of Torrymeter readings with storage time or sensory evaluation was much lower. This makes K-value a good index in these species for calibrating an apparatus designed to measure time-related changes in fish in response to chill storage.

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Genetic parameters for quality traits by non-invasive methods and their G x E interactions in ocean cages and estuaries on gilthead seabream (Sparus aurata)

Aquaculture ◽

10.1016/j.aquaculture.2021.736462 ◽

2021 ◽

Vol 537 ◽

pp. 736462

Author(s):

I. Elalfy ◽

H.S. Shin ◽

D. Negrín-Báez ◽

A. Navarro ◽

M.J. Zamorano ◽

...

Keyword(s):

Genetic Parameters ◽

Sparus Aurata ◽

Gilthead Seabream ◽

Quality Traits ◽

Non Invasive

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Genetic parameters for Photobacterium damselae subsp. piscicida resistance, immunological markers and body weight in gilthead seabream (Sparus aurata)

Aquaculture ◽

10.1016/j.aquaculture.2021.736892 ◽

2021 ◽

pp. 736892

Author(s):

Antonio Vallecillos ◽

Rubén Perez ◽

Elena Chaves-Pozo ◽

Marta Arizcun ◽

Juan M. Afonso ◽

...

Keyword(s):

Body Weight ◽

Genetic Parameters ◽

Sparus Aurata ◽

Gilthead Seabream ◽

Immunological Markers ◽

Photobacterium Damselae

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Effects of subcutaneous injection of λ/κ‐carrageenin on the immune and liver antioxidant status of gilthead seabream ( Sparus aurata )

Journal of Fish Diseases ◽

10.1111/jfd.13452 ◽

2021 ◽

Author(s):

José Carlos Campos‐Sánchez ◽

Francisco A. Guardiola ◽

José María García Beltrán ◽

Diana Ceballos‐Francisco ◽

María Ángeles Esteban

Keyword(s):

Subcutaneous Injection ◽

Antioxidant Status ◽

Sparus Aurata ◽

Gilthead Seabream

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Aflatoxicosis Dysregulates the Physiological Responses to Crowding Densities in the Marine Teleost Gilthead Seabream (Sparus aurata)

Animals ◽

10.3390/ani11030753 ◽

2021 ◽

Vol 11 (3) ◽

pp. 753

Author(s):

Andre Barany ◽

Juan Fuentes ◽

Gonzalo Martínez-Rodríguez ◽

Juan Miguel Mancera

Keyword(s):

Mrna Expression ◽

Sparus Aurata ◽

Stocking Density ◽

Head Kidney ◽

Dietary Exposure ◽

Experimental Period ◽

Gilthead Seabream ◽

Marine Teleost ◽

Lipid Metabolites ◽

Period Duration

Several studies in fish have shown that aflatoxin B1 (AFB1) causes a disparity of species-dependent physiological disorders without compromising survival. We studied the effect of dietary administration of AFB1 (2 mg AFB1 kg−1 diet) in gilthead seabream (Sparus aurata) juveniles in combination with a challenge by stocking density (4 vs. 40 g L−1). The experimental period duration was ten days, and the diet with AFB1 was administered to the fish for 85 days prior to the stocking density challenge. Our results indicated an alteration in the carbohydrate and lipid metabolites mobilization in the AFB1 fed group, which was intensified at high stocking density (HSD). The CT group at HSD increased plasma cortisol levels, as expected, whereas the AFB1-HSD group did not. The star mRNA expression, an enzyme involved in cortisol synthesis in the head kidney, presented a ninefold increase in the AFB1 group at low stocking density (LSD) compared to the CT-LSD group. Adenohypophyseal gh mRNA expression increased in the AFB1-HSD but not in the CT-HSD group. Overall, these results confirmed that chronic AFB1 dietary exposure alters the adequate endocrinological physiological cascade response in S. aurata, compromising the expected stress response to an additional stressor, such as overcrowding.

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Influence of Genetic Selection for Growth and Broodstock Diet n-3 LC-PUFA Levels on Reproductive Performance of Gilthead Seabream, Sparus aurata

Animals ◽

10.3390/ani11020519 ◽

2021 ◽

Vol 11 (2) ◽

pp. 519

Author(s):

Shajahan Ferosekhan ◽

Serhat Turkmen ◽

Cathaysa Pérez-García ◽

Hanlin Xu ◽

Ana Gómez ◽

...

Keyword(s):

Reproductive Performance ◽

Egg Quality ◽

Sparus Aurata ◽

Genetic Selection ◽

Growth Trait ◽

High Growth ◽

Gilthead Seabream ◽

Commercial Diet ◽

Selection For ◽

Broodstock Diet

Genetic selection in gilthead seabream (GSB), Sparus aurata, has been undertaken to improve the growth, feed efficiency, fillet quality, skeletal deformities and disease resistance, but no study is available to delineate the effect of genetic selection for growth trait on GSB reproductive performance under mass spawning condition. In this study, high growth (HG) or low growth (LG) GSB broodstock were selected to evaluate the sex steroid hormones, sperm, egg quality and reproductive performance under different feeding regime of commercial diet or experimental broodstock diet containing either fish oil (FO) or vegetable oil (VO) based diet. Under commercial diet feeding phase, broodstock selected for either high growth or low growth did not show any significant changes in the egg production per kg female whereas egg viability percentage was positively (p = 0.014) improved by the high growth trait broodstock group. The experimental diet feeding results revealed that both growth trait and dietary fatty acid composition influenced the reproductive performance of GSB broodstock. In the experimental diet feeding phase, we observed high growth trait GSB males produced a higher number of sperm cells (p < 0.001) and also showed a higher sperm motility (p = 0.048) percentage. The viable egg and larval production per spawn per kg female were significantly improved by the broodstock selected for high growth trait and fed with fish oil-based diet. This present study results signifies that gilthead seabream broodstock selected on growth trait could have positive role in improvement of sperm and egg quality to produce viable progeny.

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