The incidence of different pellet size on growth, gut evacuation, feed digestibility and feed waste in gilthead sea bream (Sparus aurata)

Busti, Serena; Bonaldo, Alessio; Diana, Alessia; Perfetti, Simone; Viroli, Cinzia; Fontanillas, Ramón; Eriksen, Tommy Berger; Gatta, Pier Paolo; Parma, Luca

doi:10.1016/j.aquaculture.2022.738204

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…All capsules presented the same chemosensory properties at oropharyngeal level, meaning that palatability, texture, avour and odour associated with traditional pelleted diets were negligible for the sh . Moreover, it is important to note that neither the capsules or pellets leached nutrients into the water, which could act as attractants to sh (Busti et al, 2022). Therefore, sh had to evaluate the quality and nutritional composition of the content of the capsules and learn to associate this information with (2003).…”

Section: Discussionmentioning

confidence: 99%

Nile Tilapia and Gilthead Seabream Dietary Self-Selection of Alternative Feeds with Spirulina and Quinoa

Mendes,

Conceição,

Dias

et al. 2024

Preprint

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Classical assessments of new fish feeds are anthropocentric, focusing on growth. Although this methodology is accurate, it does not consider the fish’ perspective. This study aimed to investigate the behavioural responses and feed preferences of Nile tilapia - Oreochromis niloticus and gilthead seabream - Sparus aurata, in two self-selection trials (self-feeders and diet encapsulation). Using self-feeders, both species were offered three feeds: a control (PD) and two diets (ORG1 and ORG2) containing non-conventional ingredients, including spirulina (Spirulina platensis) and quinoa (Chenopodium quinoa). Three groups of tilapia with an average weight of 163.0 g ± 4.3 g (mean ± SD) and four groups of seabreams with 174.7 g ± 27.0 g were tested. To investigate the role of olfactory factors in dietary selection, three other diets were encapsulated and offered to tilapia: Diet A, a purified feed, Diet B that contained predominantly spirulina and Diet C which had a mixture of spirulina and quinoa. Seven individual tilapia of 331.9 g ± 31.4 g were used. Using self-feeders, tilapia exhibited a preference for ORG2 (46.5%), which was influenced by the sensory properties of feeds and post-ingestion signals, as their choice for ORG2 persisted during diet encapsulation using Diet C, which was also formulated with quinoa and spirulina. Seabream did not show a preference for any feed. These findings highlight the effectiveness of self-selection experiments in allowing fish to express their feeding behaviour and preferences. Therefore, this approach should be considered in the initial screening and design of new aquaculture feeds and ingredients.

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Section: Discussionmentioning

confidence: 99%

Nile Tilapia and Gilthead Seabream Dietary Self-Selection of Alternative Feeds with Spirulina and Quinoa

Mendes,

Conceição,

Dias

et al. 2024

Preprint

View full text Add to dashboard Cite

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“…Secondly, the ground ingredients were mixed at the proportions shown in Table 1 ; oil and water were added in batches during mixing, and each batch of diets was mixed for 30 min to achieve homogenization. The mixture was then placed in an extruder (Valva Machinery Co., Ltd., Guangzhou, China), and the diets were transformed into three sizes of spherical pellets (1, 2, and 3 mm diameter) to suit the growth state of the fish ( 37 ). Finally, the diets were placed in a drying oven at 45°C until the moisture content was reduced to approximately 10% ( 38 ); thereafter, the pellets were stored 4°C.…”

Section: Methodsmentioning

confidence: 99%

Effects of cysteine addition to low-fishmeal diets on the growth, anti-oxidative stress, intestine immunity, and Streptococcus agalactiae resistance in juvenile golden pompano (Trachinotus ovatus)

Liu

Zhu²,

Guo³

et al. 2022

Front. Immunol.

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As the precursor of taurine, cysteine serves physiological functions, such as anti-oxidative stress and immune improvement. Investigation of cysteine and its derivatives has made positive progress in avian and mammalian species, yet the study and application of cysteine in aquatic animals are relatively rare. Therefore, we evaluated the effects of supplementing a low-fishmeal diet with various levels of cysteine on the growth, antioxidant capacity, intestine immunity, and resistance against Streptococcus agalactiae of the juvenile golden pompano (Trachinotus ovatus). According to our study, exogenous supplementation with 0.6-1.2% cysteine greatly increased the final body weight (FBW) and specific growth rate (SGR) of golden pompano compared to the control group. Under the present conditions, the optimum dietary cysteine supplementation level for golden pompano was 0.91% based on the polynomial regression analysis of SGR. Meanwhile, we found that the Nrf2/Keap1/HO-1 signaling pathway was notably upregulated with the increase of exogenous cysteine, which increased antioxidant enzyme activity in serum and gene expression in the intestine and reduced the level of reactive oxygen species (ROS) in the serum of golden pompano. In addition, morphological analysis of the midgut demonstrated that exogenous cysteine improved muscle thickness and villi length, which suggested that the physical barrier of the intestine was greatly strengthened by cysteine. Moreover, cysteine increased the diversity and relative abundance of the intestinal flora of golden pompano. Cysteine suppressed intestinal NF-κB/IKK/IκB signaling and pro-inflammatory cytokine mRNA levels. Conversely, intestinal anti-inflammatory cytokine gene expression and serum immune parameters were upregulated with the supplementary volume of cysteine and improved intestine immunity. Further, exogenous cysteine supplementation greatly reduced the mortality rate of golden pompano challenged with S. agalactiae. In general, our findings provide more valuable information and new insights into the rational use of cysteine in the culture of healthy aquatic animals.

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Gut microbiota dynamics interacting with gastrointestinal evacuation of Apostichopus japonicus: novel insights into promising strategies for environmental improvement

Song,

Zhou,

Dong

et al. 2024

Environ Sci Pollut Res

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The incidence of different pellet size on growth, gut evacuation, feed digestibility and feed waste in gilthead sea bream (Sparus aurata)

Cited by 7 publications

References 39 publications

Nile Tilapia and Gilthead Seabream Dietary Self-Selection of Alternative Feeds with Spirulina and Quinoa

Nile Tilapia and Gilthead Seabream Dietary Self-Selection of Alternative Feeds with Spirulina and Quinoa

Effects of cysteine addition to low-fishmeal diets on the growth, anti-oxidative stress, intestine immunity, and Streptococcus agalactiae resistance in juvenile golden pompano (Trachinotus ovatus)

Gut microbiota dynamics interacting with gastrointestinal evacuation of Apostichopus japonicus: novel insights into promising strategies for environmental improvement

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