Inclusion of duckweed (Lemna minor) in the diet improves flesh omega-3 long-chain polyunsaturated fatty acid profiles but not the growth of farmed Nile tilapia (Oreochromis niloticus)

Opiyo, Mary A.; Muendo, Patricia; Mbogo, Kevin; Ngugi, Charles C.; Charo‐Karisa, Harrison; Orina, Paul; Leschen, William; Glencross, Brett; Tocher, Douglas R.

doi:10.1016/j.anifeedsci.2022.115442

Cited by 10 publications

(11 citation statements)

References 33 publications

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“…The findings of this study concurred with those of a survey on the bioaccumulation of L. minor FAs by Oreochromis niloticus [9] which indicated that a higher amount of linolenic acid ingested produced an almost similar amount of DHA in fish muscles as that observed in the L. minor analyzed in this study (Table 2). However, the survey utilized L. minor from the wild as opposed to the one analyzed in this study cultured using chicken manure in plastic tanks and outdoor earthen ponds.…”

Section: Fatty Acids Composition Of L Minor Cultured In Indoorsupporting

confidence: 91%

“…However, the survey utilized L. minor from the wild as opposed to the one analyzed in this study cultured using chicken manure in plastic tanks and outdoor earthen ponds. Could it be that the L. minor analyzed by Opiyo et al [9] had not grown to a state, which it could convert linolenic to DHA? In our study, contrary to the survey findings [9], L. minor was found to contain moderate amounts of DHA and linolenic acid (Table 2).…”

Section: Fatty Acids Composition Of L Minor Cultured In Indoormentioning

confidence: 99%

“…Could it be that the L. minor analyzed by Opiyo et al [9] had not grown to a state, which it could convert linolenic to DHA? In our study, contrary to the survey findings [9], L. minor was found to contain moderate amounts of DHA and linolenic acid (Table 2). Other than humans, obtaining DHA from O. niloticus fed on feed containing L. minor, there appears to be a possibility of them obtaining it directly from the latter as a prepared supplement.…”

Section: Fatty Acids Composition Of L Minor Cultured In Indoormentioning

confidence: 99%

“…They also act as precursors in the biosynthesis of hormones that regulate the reproductive cycle [6,7]. Some of the health benefits for humans include: neural development in infants, improvement of immune and inflammatory responses, prevention of cancer, mental, cardiovascular, and chronic diseases [2,4] In aquaculture, LC PUFAs are essential for fillets' quality of harvested fish, feed conversion efficiency, and reproduction, all of which are important determinants of production [8,9]. Most of the LC PUFAs used in aquafeeds are obtained from fish meal and animal oils [3], which are expensive and are increasingly under competition.…”

Section: Introductionmentioning

confidence: 99%

“…They exhibit high growth rates that cover ponds or lakes in a few days under favorable environmental conditions [11][12][13][14]. Despite the documentation of FAs profiles from wild L. minor populations [9,[14][15][16], there is a paucity of information on the quantitative variation of L. minor FAs composition in indoor and outdoor culture settings. Thus, the primary objective of this study was to identify and compare the FAs composition in L. minor cultured in indoor plastic tanks and outdoor fish ponds.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study on Fatty Acids Composition of Lemna minor (Duckweed) Cultured in Indoor Plastic Tanks and Outdoor Earthen Ponds

Achoki,

Orina,

Kaingu

et al. 2024

Aquaculture Research

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Global interest in using duckweed (Lemna minor) as a substitute for fish, livestock, and human diets has spurred research on the mass culture of the species. There is a scarcity of information on the L. minor fatty acid composition in different aquaculture settings. A comparative study was carried out to investigate the fatty acid composition of L. minor cultured in indoor plastic tanks and outdoor earthen ponds for 30 days. During the culture period, culture facilities were fertilized using livestock manure. Fatty acid characterization was done using gas chromatography method. Fifteen fatty acids: five saturated (SAFAs), five monounsaturated (MUFAS), and five polyunsaturated (PUFAs) were identified. Fatty acid compositions varied between indoor and outdoor settings. Percentage composition of L. minor PUFAs cultured outdoor (37.13) was higher than that of indoor (21.96) settings. L. minor SAFAs percentage composition was higher in the indoor culture at 41.63% while that of outdoor was 33.75%. The composition of L. minor MUFAs in indoor tanks was higher (36.32%) than in outdoor earthen ponds (29.10%). This study indicated the presence of docosahexaenoic, eicosapentaenoic, linoelaidic, and eicosanoic acids in L. minor seldom reported in past studies. Paired Students’ t-test indicated that the means of the fatty acid composition were significantly different (p<0.05) in both settings, with docosahexaenoic showing the highest paired mean difference.

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Section: Fatty Acids Composition Of L Minor Cultured In Indoorsupporting

confidence: 91%

Section: Fatty Acids Composition Of L Minor Cultured In Indoormentioning

confidence: 99%

Section: Fatty Acids Composition Of L Minor Cultured In Indoormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative Study on Fatty Acids Composition of Lemna minor (Duckweed) Cultured in Indoor Plastic Tanks and Outdoor Earthen Ponds

Achoki,

Orina,

Kaingu

et al. 2024

Aquaculture Research

Self Cite

View full text Add to dashboard Cite

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Does duckweed (Lemna minor) feed inclusion play a role on growth, feed conversion ratio and reproductive performance (fertilization, hatchability and survivability rates) in omnivorous fish? Evidence in Nile tilapia (Oreochromis niloticus‐Linnaeus, 1758)

Achoki,

Kaingu,

Oduma

et al. 2024

Aquaculture Fish & Fisheries

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Fish feed production is fraught with high costs due to the inclusion of expensive fishmeal and animal proteins that can be sourced from aquatic macrophytes. Limited attempts have been made on use of the latter for fish feed production. Further, the quality of feed given to fish is known to affect its growth and reproductive performance. Role of feeds containing duckweed (Lemna minor) at 0%‐control feed, 10%, 15%, 20% and 25% inclusion levels on growth and reproductive performance of Oreochromis niloticus of size 18 ± 1 g were evaluated for 12 weeks. The fish were fed twice daily at 10% body weight at 9.00 a.m. and 4.00 p.m. Length–weight measurements were done fortnightly using a measuring board and a weighing balance, respectively. Female mouth‐brooding fish were used to evaluate reproductive performance indicators, namely %: fertilization, hatchability and survivability. Data were subjected to one‐way analysis of variance followed by post hoc and polynomial orthogonal analysis to identify L. minor diets with significant differences (p < 0.05). Fish fed on a diet containing 10% L. minor inclusion showed significantly better growth performance and feed conversion ratio than those fed on the control diet. All L. minor diets gave good fish condition factors above 1.0. Fish fed on a diet containing 10% L. minor and those fed on the control gave reasonably high survival rates of 85.55% and 83.33%, respectively, whereas those fed on 20% L. minor produced the same growth performance as control. Orthogonal polynomial analysis for the final weights across the L. minor diets – 0%–25% – showed a cubic polynomial model (p = 0.000), whereas final lengths portrayed a linear inverse significant relationship (p < 0.05). Inclusion of L. minor in the diets resulted to slightly better fertilization, hatchability and survivability rates at 10%, 20% and 15%, respectively. In conclusion, inclusion of L. minor from 10% to 20% in fish feeds is recommended for enhancing growth and reproductive performance of O. niloticus.

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Macroalgae, Macrophytes, Filamentous Algae: ‘Not to Everyone’s Taste’

Steinberg

2024

Aquatic Animal Nutrition

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Inclusion of duckweed (Lemna minor) in the diet improves flesh omega-3 long-chain polyunsaturated fatty acid profiles but not the growth of farmed Nile tilapia (Oreochromis niloticus)

Cited by 10 publications

References 33 publications

Comparative Study on Fatty Acids Composition of Lemna minor (Duckweed) Cultured in Indoor Plastic Tanks and Outdoor Earthen Ponds

Comparative Study on Fatty Acids Composition of Lemna minor (Duckweed) Cultured in Indoor Plastic Tanks and Outdoor Earthen Ponds

Does duckweed (Lemna minor) feed inclusion play a role on growth, feed conversion ratio and reproductive performance (fertilization, hatchability and survivability rates) in omnivorous fish? Evidence in Nile tilapia (Oreochromis niloticus‐Linnaeus, 1758)

Macroalgae, Macrophytes, Filamentous Algae: ‘Not to Everyone’s Taste’

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