Effects of dietary α-linolenic acid (18:3n−3)/linoleic acid (18:2n−6) ratio on growth performance, fillet fatty acid profile and finishing efficiency in Murray cod

Senadheera, Sanjaya; Turchini, Giovanni M.; Thanuthong, Thanongsak; Francis, David S.

doi:10.1016/j.aquaculture.2010.09.039

Cited by 40 publications

(41 citation statements)

References 26 publications

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“…This indicated that Japanese seabass probably could utilize ALA better than LNA given that ALA and LNA were the characteristic fatty acids of LO and SO, respectively. This was similar with grouper (Wu and Chen ) and Murray cod (Senadheera et al ) yet different from some freshwater fish such as iridescent shark (Asdari et al ), Eurasian perch (Blanchard et al ), and Nile tilapia (El‐Husseiny et al ) which require more LNA than ALA in the diet. Even silver perch did not respond to dietary ALA while its growth rate increased with increasing dietary LNA content in a certain range (Smith et al ).…”

Section: Discussionsupporting

confidence: 77%

Replacement of Fish Oil with Linseed Oil or Soybean Oil in Feeds for Japanese Seabass, Lateolabrax japonicus: Effects on Growth Performance, Immune Response, and Tissue Fatty Acid Composition

Wang

Zuo

et al. 2015

J World Aquaculture Soc

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A 66-d feeding experiment was conducted to investigate the utilization of vegetable oils in Japanese seabass (initial weight: 10.09 ± 0.70 g). In experimental diets, linseed oil (LO) or soybean oil (SO) was used to replace 1/3, 2/3, and 3/3 of fish oil (FO) (Diets F 2 L 1 , F 1 L 2 , and LO, respectively, or Diets F 2 S 1 , F 1 S 2 , and SO, respectively). A diet with FO alone was used as the control diet. LO or SO supplementation did not reduce the specific growth rate (3.06-3.29%/d) and feed efficiency ratio (0.75-0.83) of fish, but group F 2 L 1 showed significantly better growth (P < 0.05) and feed utilization (P < 0. 01) than group SO. Total replacement of FO with LO or SO significantly reduced certain non-specific innate immune responses. Total replacement of FO by LO significantly increased the lipid content of fish.Concentrations of long-chain polyunsaturated fatty acids (LC-PUFAs) in whole fish and tissues were significantly reduced by LO or SO supplementation. In conclusion, LO or SO supplementations did not reduce the growth of Japanese seabass but reduced the immune responses and LC-PUFA concentrations. LO was a better lipid source than SO for Japanese seabass in terms of fish growth and immune responses.

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Section: Discussionsupporting

confidence: 77%

Replacement of Fish Oil with Linseed Oil or Soybean Oil in Feeds for Japanese Seabass, Lateolabrax japonicus: Effects on Growth Performance, Immune Response, and Tissue Fatty Acid Composition

Wang

Zuo

et al. 2015

J World Aquaculture Soc

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“…A simple mass balance for estimating overall FA gain/loss was implemented as described by Senadheera et al (2010). The total lipid and FA components supplied through feed are described by two steps: (1) total lipid supplied = (total dry feed provided [kg] × % lipid content of feed); (2) individual FA supplied = (total lipid supplied [kg] × weight % of individual FA in feed).…”

Section: Production Performance and Fa Mass Balance Estimationmentioning

confidence: 99%

Effect of Different Feeding Levels of Plant‐ingredient‐based Feed on Fillet Fatty Acid Profile, Carcass Trait, and Sensory Characteristics of Indian Major Carps in Earthen Pond Polyculture

Pradhan

Giri

Mohanty

et al. 2018

J World Aquaculture Soc

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The objective of the present study was to evaluate the effect of plant‐ingredient‐based feeds on fillet fatty acid profiles, proximate composition, carcass traits, and sensory characteristics of three Indian major carps (IMCs), Catla catla, Labeo rohita, and Cirrhinus mrigala, when fed at different levels of their body weight. An experimental feed was prepared with only plant ingredients. The IMCs were fed twice daily at 1.0, 1.5, 2.0, and 2.5% of their body weight for 150 d in 0.06‐ha earthen pond polyculture systems. The maximum growth and best feed utilization was achieved with feeding at 2% of fish biomass in the ponds. Fillet yield and lipid recovery increased significantly (P < 0.05), with increasing feeding level up to 2% of body weight and plateaued thereafter. In fillets, eicosapentaenoic acid (20:5n‐3) and docosahexaenoic acid (22:6n‐3) concentration increased with increasing feeding levels. Carcass traits, sensory characteristics, and consumer acceptance of IMC fillets were not influenced by feeding plant‐ingredient‐based feeds at different feeding rates.

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“…or 18:2n-6 (i.e soybean oil, sunflower oil, etc.) have been studied in fish in detail [14][15][16], studies focusing on a sliding 18:3n-3/18:2n-6 ratio are relatively scarce and limited to a few species, including: Coho salmon (Oncorhynchus kisutch) [17]; Milkfish (Chanos chanos) [18]; silver perch (Bidyanus bidyanus) [19]; Eurasian perch (Perca fluviatilis) [20]; yellow catfish (Pelteobagrus fulvidraco) [21]; and Murray cod (Maccullochella peelii peelii) [22,23]. An early study on rainbow trout also assessed the effect of various 18:3n-3/18:2n-6 ratios in juvenile fish from 0.4 to 4 g of body weight [24].…”

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confidence: 99%

LC‐PUFA Biosynthesis in Rainbow Trout is Substrate Limited: Use of the Whole Body Fatty Acid Balance Method and Different 18:3n‐3/18:2n‐6 Ratios

Thanuthong

Francis

Senadheera

et al. 2011

Lipids

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Five experimental diets with constant total C(18) PUFA and varying 18:3n-3/18:2n-6 ratios were fed to rainbow trout over an entire production cycle. The whole-body fatty acid balance method demonstrated a clear trend of progressively reduced fatty acid bioconversion activity along the n-3 and n-6 pathways, up to the production of 20:5n-3 and 20:4n-6, respectively. This suggests that the pathway exhibits a "funnel like" progression of activity rather than the existence of a single rate limiting step. The production of 22:5n-3 and 22:6n-3 was more active than that of 20:5n-3. However, despite this trend in reduced apparent in vivo net enzyme activity, the efficiency of the various bioconversion steps (measured as % of bioconverted substrate) confirmed an opposing trend. A 3.2-fold higher Δ-6 desaturase affinity towards 18:3n-3 over 18:2n-6 and an 8-fold greater Δ-5 desaturase affinity towards 20:4n-3 over 20:3n-6 were recorded. The main results of the study were that (1) rainbow trout are quite efficient at bioconverting 18:3n-3 to 22:6n-3, and (2) the LC-PUFA biosynthetic pathway is substrate limited. Fillet n-3 LC-PUFA concentrations increased with the increasing dietary supply of 18:3n-3. Despite an almost identical dietary supply of n-3 LC-PUFA, originating from the fish meal fraction of the diets, the fillets of trout fed the diet richest in 18:3n-3 were 2-fold higher in n-3 LC-PUFA than fish fed low 18:3n-3 diets. Nevertheless, fillets of trout fed a fish oil control diet contained more than double the amount of n-3 LC-PUFA compared to fish fed the diets richest in 18:3n-3.

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Effects of dietary α-linolenic acid (18:3n−3)/linoleic acid (18:2n−6) ratio on growth performance, fillet fatty acid profile and finishing efficiency in Murray cod

Cited by 40 publications

References 26 publications

Replacement of Fish Oil with Linseed Oil or Soybean Oil in Feeds for Japanese Seabass, Lateolabrax japonicus: Effects on Growth Performance, Immune Response, and Tissue Fatty Acid Composition

Replacement of Fish Oil with Linseed Oil or Soybean Oil in Feeds for Japanese Seabass, Lateolabrax japonicus: Effects on Growth Performance, Immune Response, and Tissue Fatty Acid Composition

Effect of Different Feeding Levels of Plant‐ingredient‐based Feed on Fillet Fatty Acid Profile, Carcass Trait, and Sensory Characteristics of Indian Major Carps in Earthen Pond Polyculture

LC‐PUFA Biosynthesis in Rainbow Trout is Substrate Limited: Use of the Whole Body Fatty Acid Balance Method and Different 18:3n‐3/18:2n‐6 Ratios

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