Improving winter production of Nile tilapia: What can be done?

Nóbrega, Renata Oselame; Banze, Jorge Filipe; Batista, Rosana Oliveira; Fracalossi, Débora Machado

doi:10.1016/j.aqrep.2020.100453

Cited by 25 publications

(17 citation statements)

References 118 publications

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“…[25] In our study tilapia were reared at a marginally lower temperature than optimum for the species (26 °C) and the presence of DHA in the enrichment diets would be deemed beneficial according to other studies in this area on tilapia held at much lower temperatures. [26] It should be noted that the level of total n-3 LC-PUFAs (i.e., EPA and DHA) supplied by a portion of Atlantic salmon fillet would be far higher than in tilapia fillet due to the salmon inherent higher lipid content. A consumer would, therefore, need to consume more tilapia than salmon, in order to meet the same n-3 intake.…”

Section: Resultsmentioning

confidence: 99%

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Delivering a Nutritionally Enhanced Tilapia Fillet Using a Pre‐Harvest Phase Omega‐3 Thraustochytrids Protist Enriched Diet

Davies

Roderick²,

Brudenell‐Bruce³

et al. 2022

Euro J Lipid Sci & Tech

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Nile tilapia (Oreochromis niloticus) offers an affordable food source to many low‐income consumers. However, farmed tilapia has drawn much criticism over the low omega‐3 (n‐3) and high omega‐6 (n‐6) lipid levels. Subsequently, it has been questioned whether it is truly healthy food. This study fed tilapia with a specialized “finishing” diet with the inclusion of commercial Thraustochytrids protist biomass and oil before the harvestable fish size. The fish are fed with two different dietary regimes over 6 weeks. One is a commercially available tilapia feed used as a reference. The second diet is composed of an exclusive oil source from Thraustochytrids protist (HI‐n3). The results show that HI‐ n3 has significantly increased the fillet n‐3 content by 400% in comparison to commercial diet (COM) after Week 6 of feeding. Specifically, docosahexaenoic acid (DHA, n‐3) content is the attributing fatty acid for the n‐3 increase. This is particularly evident when DHA is expressed as a percentage of total lipid content. The n‐3:n‐6 ratio increased in tilapia fed with the HI‐n3 diet attributed to the DHA accumulation. The investigation shows that it is possible to favorably “lipid tailor” tilapia before harvest. Practical applications: The practical application of this technique is to enrich farmed tilapia with a high dietary omega‐3 (n‐3) Thraustochytrids protist oil source for a short‐term period before harvesting. It is an objective that the fillet product would be more functional in its nutritional content by supplying more than just high‐quality protein for consumers. This would have paramount implications for low‐income consumers, where high n‐3 oil foods are not readily available or affordable (e.g., landlocked nations). Furthermore, tilapia is widely consumed in China and Southeast Asian countries but is also promoted as a high nutritional value food source in the western hemisphere. This investigation advocates the ability to change the image of this fish species by a simple dietary manipulation. In an era of elevated intake of omega 6 (n‐6) fatty acids food sources, n‐3 rich fish is a vital balance to counter this negative trend in human health.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Delivering a Nutritionally Enhanced Tilapia Fillet Using a Pre‐Harvest Phase Omega‐3 Thraustochytrids Protist Enriched Diet

Davies

Roderick²,

Brudenell‐Bruce³

et al. 2022

Euro J Lipid Sci & Tech

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“…Although Nile tilapia (Oreochromis niloticus) is the third most important fish species in term of aquaculture, with an annual production of 4.5 million Mt in 2018 [123], research efforts into the effects of DON have not been proportional. The relative lack of effort could be related to Nile tilapia primarily being cultivated in tropical and subtropical areas [139] while DON is the main contaminant in crops present in temperate regions. Indeed, there have been more research efforts on the threats posed by AFB 1 , which is one of the most prevalent mycotoxins in tropical latitudes.…”

Section: Tilapiamentioning

confidence: 99%

The Occurrence of Mycotoxins in Raw Materials and Fish Feeds in Europe and the Potential Effects of Deoxynivalenol (DON) on the Health and Growth of Farmed Fish Species—A Review

Koletsi

Schrama

Graat

et al. 2021

Toxins

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The first part of this study evaluates the occurrence of mycotoxin patterns in feedstuffs and fish feeds. Results were extrapolated from a large data pool derived from wheat (n = 857), corn (n = 725), soybean meal (n = 139) and fish feed (n = 44) samples in European countries and based on sample analyses by liquid chromatography/tandem mass spectrometry (LC-MS/MS) in the period between 2012–2019. Deoxynivalenol (DON) was readily present in corn (in 47% of the samples) > wheat (41%) > soybean meal (11%), and in aquafeeds (48%). Co-occurrence of mycotoxins was frequently observed in feedstuffs and aquafeed samples. For example, in corn, multi-mycotoxin occurrence was investigated by Spearman’s correlations and odd ratios, and both showed co-occurrence of DON with its acetylated forms (3-AcDON, 15-AcDON) as well as with zearalenone (ZEN). The second part of this study summarizes the existing knowledge on the effects of DON on farmed fish species and evaluates the risk of DON exposure in fish, based on data from in vivo studies. A meta-analytical approach aimed to estimate to which extent DON affects feed intake and growth performance in fish. Corn was identified as the ingredient with the highest risk of contamination with DON and its acetylated forms, which often cannot be detected by commonly used rapid detection methods in feed mills. Periodical state-of-the-art mycotoxin analyses are essential to detect the full spectrum of mycotoxins in fish feeds aimed to prevent detrimental effects on farmed fish and subsequent economic losses for fish farmers. Because levels below the stated regulatory limits can reduce feed intake and growth performance, our results show that the risk of DON contamination is underestimated in the aquaculture industry.

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“…Such as, cultivation of O. aureus for colder regions, Red Tilapia hybrids (Oreochormis spp. ), O. spilurus and Tilapia guineensis (Dumeril) and for brackish water regions around the world gaining importance [9,10].…”

Section: Introductionmentioning

confidence: 99%

Recent Trends on Tilapia Cultivation and Its Major Socioeconomic Impact among Some Developing Nations: A Review

Samaddar

2022

AJFAR

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Tilapia cultivation has been found to be an effective tool for many developing countries for socio-economic development by addressing some important issues like food-security and employment generation. Adoption of tilapia cultivation has increased over the decades because of easy management practice and versatile farming technologies have been observed worldwide. Tilapia gain popularity because of their excellent breeding capabilities, flesh quality, high growth rate, disease resistance and survival capabilities under different farming systems and environmental conditions. Such features boosting up rapid growth of tilapia producing industries in an impactful way, by involving poor and non-poor farming communities in some of the developing countries of Asian, African and South American continents. However, some problems still exists with cultivation of different tilapia varieties; such as the inadequate availability of quality fry, deterioration in seed quality, limited technical knowledge among farming communities and poor marketing strategies especially in some of these developing countries depriving its commercial success to some extent. This review describes a present scenario regarding potentialities and difficulties of commercial adaptation of Tilapia cultivation under socio-economically constrained conditions.

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Improving winter production of Nile tilapia: What can be done?

Cited by 25 publications

References 118 publications

Delivering a Nutritionally Enhanced Tilapia Fillet Using a Pre‐Harvest Phase Omega‐3 Thraustochytrids Protist Enriched Diet

Delivering a Nutritionally Enhanced Tilapia Fillet Using a Pre‐Harvest Phase Omega‐3 Thraustochytrids Protist Enriched Diet

The Occurrence of Mycotoxins in Raw Materials and Fish Feeds in Europe and the Potential Effects of Deoxynivalenol (DON) on the Health and Growth of Farmed Fish Species—A Review

Recent Trends on Tilapia Cultivation and Its Major Socioeconomic Impact among Some Developing Nations: A Review

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