scholarly journals Fatty Acid Composition and Levels of Selected Polyunsaturated Fatty Acids in Four Commercial Important Freshwater Fish Species from Lake Victoria, Tanzania

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Agnes Robert ◽  
Prosper Mfilinge ◽  
Samwel M. Limbu ◽  
Chacha J. Mwita
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Human Health ◽  
Fish Species ◽  
Lake Victoria ◽  
Nile Perch ◽  
Commercial Fish ◽  
Tilapia Zillii ◽  
Significant Difference ◽  
Commercial Species

Fatty acids (FAs) particularlyω3 andω6 polyunsaturated fatty acids (PUFAs) play important role in human health. This study aimed to investigate the composition and levels of selectedω3 PUFAs in four commercial fish species, Nile perch (Lates niloticus), Nile tilapia (Oreochromis niloticus),Tilapia zillii, and dagaa (Rastrineobola argentea) from Mwanza Gulf in Lake Victoria. The results indicated that 36 types of FAs with different saturation levels were detected. These FAs were dominated by docosahexaenoic (DHA), eicosapentaenoic (EPA), docosapentaenoic (DPA), and eicosatetraenoic acids.O. niloticushad the highest composition of FAs (34) compared toL. niloticus(27),T. zillii(26), andR. argentea(21). The levels of EPA differed significantly among the four commercial fish species(F=6.19,  P=0.001). The highest EPA levels were found inR. argenteafollowed byL. niloticusandO. niloticusand the lowest inT. zillii. The DPA levels showed no significant difference among the four fish species studied(F=0.652,  P=0.583). The study concluded that all four commercial species collected from Mwanza Gulf are good for human health, butR. argenteais the best for consumption because it contains higher levels ofω3 FAs, mainly EPA.

scholarly journals Microalgae n-3 PUFAs Production and Use in Food and Feed Industries

Marine Drugs ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 113
Author(s):  
Marine Remize ◽  
Yves Brunel ◽  
Joana L. Silva ◽  
Jean-Yves Berthon ◽  
Edith Filaire
Keyword(s):  
Fatty Acids ◽  
Global Warming ◽  
Docosahexaenoic Acid ◽  
Polyunsaturated Fatty Acids ◽  
Eicosapentaenoic Acid ◽  
Human Health ◽  
Current Knowledge ◽  
Epa And Dha ◽  
Anti Cancer ◽  
Food And Feed

N-3 polyunsaturated fatty acids (n-3 PUFAs), and especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are essential compounds for human health. They have been proven to act positively on a panel of diseases and have interesting anti-oxidative, anti-inflammatory or anti-cancer properties. For these reasons, they are receiving more and more attention in recent years, especially future food or feed development. EPA and DHA come mainly from marine sources like fish or seaweed. Unfortunately, due to global warming, these compounds are becoming scarce for humans because of overfishing and stock reduction. Although increasing in recent years, aquaculture appears insufficient to meet the increasing requirements of these healthy molecules for humans. One alternative resides in the cultivation of microalgae, the initial producers of EPA and DHA. They are also rich in biochemicals with interesting properties. After defining macro and microalgae, this review synthesizes the current knowledge on n-3 PUFAs regarding health benefits and the challenges surrounding their supply within the environmental context. Microalgae n-3 PUFA production is examined and its synthesis pathways are discussed. Finally, the use of EPA and DHA in food and feed is investigated. This work aims to define better the issues surrounding n-3 PUFA production and supply and the potential of microalgae as a sustainable source of compounds to enhance the food and feed of the future.

scholarly journals Polyunsaturated Fatty Acids Mediated Regulation of Membrane Biochemistry and Tumor Cell Membrane Integrity

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 479
Author(s):  
Souvik Mukerjee ◽  
Abdulaziz S. Saeedan ◽  
Mohd. Nazam Ansari ◽  
Manjari Singh
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Human Health ◽  
Biological Membrane ◽  
Membrane Integrity ◽  
Dietary Fatty Acids ◽  
Body System ◽  
Omega 3 ◽  
Membrane Composition ◽  
Tumor Cell Membrane

Particular dramatic macromolecule proteins are responsible for various cellular events in our body system. Lipids have recently recognized a lot more attention of scientists for understanding the relationship between lipid and cellular function and human health However, a biological membrane is formed with a lipid bilayer, which is called a P–L–P design. Our body system is balanced through various communicative signaling pathways derived from biological membrane proteins and lipids. In the case of any fatal disease such as cancer, the biological membrane compositions are altered. To repair the biological membrane composition and prevent cancer, dietary fatty acids, such as omega-3 polyunsaturated fatty acids, are essential in human health but are not directly synthesized in our body system. In this review, we will discuss the alteration of the biological membrane composition in breast cancer. We will highlight the role of dietary fatty acids in altering cellular composition in the P–L–P bilayer. We will also address the importance of omega-3 polyunsaturated fatty acids to regulate the membrane fluidity of cancer cells.

scholarly journals Conservation-Status Gaps for Marine Top-Fished Commercial Species

Fishes ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 2
Author(s):  
Imanol Miqueleiz ◽  
Rafael Miranda ◽  
Arturo Hugo Ariño ◽  
Elena Ojea
Keyword(s):  
Fish Species ◽  
Conservation Status ◽  
Species Conservation ◽  
Biodiversity Loss ◽  
Vulnerability Index ◽  
Iucn Red List ◽  
Red List ◽  
Commercial Fish ◽  
Commercial Species ◽  
Marine Realm

Biodiversity loss is a global problem, accelerated by human-induced pressures. In the marine realm, one of the major threats to species conservation, together with climate change, is overfishing. In this context, having information on the conservation status of target commercial marine fish species becomes crucial for assuring safe standards. We put together fisheries statistics from the FAO, the IUCN Red List, FishBase, and RAM Legacy databases to understand to what extent top commercial species’ conservation status has been assessed. Levels of assessment for top-fished species were higher than those for general commercial or highly commercial species, but almost half of the species have outdated assessments. We found no relation between IUCN Red List traits and FishBase Vulnerability Index, depreciating the latter value as a guidance for extinction threat. The RAM database suggests good management of more-threatened species in recent decades, but more data are required to assess whether the trend has reverted in recent years. Outdated IUCN Red List assessments can benefit from reputed stock assessments for new reassessments. The future of IUCN Red List evaluations for commercial fish species relies on integrating new parameters from fisheries sources and improved collaboration with fisheries stakeholders and managers.

scholarly journals Impact of Nile perch (Lates niloticus) overfishing on fishers’ income: Evidence from Lake Victoria, Tanzania

2020 ◽  
pp. 213-229
Author(s):  
Eliaza Mkuna ◽  
◽  
Lloyd Baiyegunhi ◽  
Keyword(s):  
Lake Victoria ◽  
Fishing Effort ◽  
Nile Perch ◽  
Switching Regression ◽  
Policy Makers ◽  
Fishing Trip ◽  
Significant Difference ◽  
Landing Sites ◽  
Lates Niloticus ◽  
Potential Impact

Despite the crucial role played by Nile perch in the income of fishers around Lake Victoria, Tanzania, fishing pressure has increased in recent years and has led to overfishing and, consequently, a risk to the lake’s future sustainability and the fishers’ livelihoods. This study used data collected in 2018 from 268 randomly selected sample fishers at 10 landing sites across Lake Victoria. In conjunction with the endogenous switching regression model, the potential impact of Nile perch overfishing on the fishers’ income per fishing trip in Lake Victoria was evaluated. The results show that there is a significant difference in the socio-economic, institutional and fishing effort characteristics of Nile perch fishers who overfish and those who do not. In particular, Nile perch fishers who overfish earn significantly higher incomes per fishing trip than fishers who do not overfish. The study recommends the need for policy makers to develop policies that acknowledge the dynamics of socio-economic, institutional and fishing effort factors. In addition, more flexible fish quota restrictions and consistent fishing patrols need to be enforced to ensure compliance with fishery regulations. These measures should promote a balance between the sustainability of fishery resources and an improved income for Nile perch fishers in Lake Victoria.

scholarly journals Significance of long chain polyunsaturated fatty acids in human health

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Rafael Zárate ◽  
Nabil Jaber‐Vazdekis ◽  
Noemi Tejera ◽  
José A. Pérez ◽  
Covadonga Rodríguez
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Human Health ◽  
Long Chain

Omega-3 polyunsaturated fatty acids and human health outcomes

BioFactors ◽  
2009 ◽  
Vol 35 (3) ◽  
pp. 266-272 ◽  
Author(s):  
Philip C. Calder ◽  
Parveen Yaqoob
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Health Outcomes ◽  
Human Health ◽  
Omega 3

scholarly journals Quantity and species of fish consumed shape breast-milk fatty acid concentrations around Lake Victoria, Kenya

2017 ◽  
Vol 21 (4) ◽  
pp. 777-784 ◽  
Author(s):  
Kathryn J Fiorella ◽  
Erin M Milner ◽  
Elizabeth Bukusi ◽  
Lia CH Fernald
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Breast Milk ◽  
Breast Feeding ◽  
Fish Species ◽  
Fish Consumption ◽  
Infant Development ◽  
Lake Victoria ◽  
Milk Fatty Acid ◽  
Cross Sectional

AbstractObjectiveLong-chain PUFA (LCPUFA) found in breast milk are derived from dietary sources and critical for optimal infant development. We examined associations between fish consumption and concentrations of LCPUFA and essentialn-3 andn-6 fatty acids in breast milk among mothers living around Lake Victoria.DesignWe used cross-sectional analyses of associations between recent fish consumption and breast-milk fatty acid concentrations.SettingThe study was conducted around Lake Victoria on Mfangano Island, Kenya, where multiple fish species are key dietary components and also are widely exported.SubjectsBreast-feeding mothers (n60) provided breast-milk samples, anthropometric measurements and questionnaire responses.ResultsIn the previous 3 d, 97 % of women consumed a mean of 178 (sd111) g fish (~2 servings/3 d). Mean breast-milk concentrations included DHA (0·75 % of total fatty acids), EPA (0·16 %), α-linolenic acid (ALA; 0·54 %), arachidonic acid (AA; 0·44 %) and linoleic acid (LA; 12·7 %). Breast-milk DHA concentrations exceeded the global average of 0·32 % in fifty-nine of sixty samples. We found native cichlids (Cichlidae) anddagaa(Rastrineobola argentea) contributed high levels of DHA, EPA and AA to local diets. We also found evidence for associations between fish species consumed and breast-milk LCPUFA concentrations when controlling for intake of other fish species, maternal body mass, maternal age, child age and exclusive breast-feeding.ConclusionsThe fatty acid composition of breast milk was influenced by the fish species consumed. Ensuring access to diverse fish and particularly inexpensive, locally available species, may be important for diet quality as well as infant growth and development.

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