scholarly journals Growth, Chemical Composition, Histology and Antioxidant Genes of Atlantic Salmon (Salmo salar) Fed Whole or Pre-Processed Nannochloropsis oceanica and Tetraselmis sp.

Fishes ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 23
Author(s):  
Solveig Lysfjord Sørensen ◽  
Ateshm Ghirmay ◽  
Yangyang Gong ◽  
Dalia Dahle ◽  
Ghana Vasanth ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Atlantic Salmon ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Basal Diet ◽  
Nannochloropsis Oceanica ◽  
Antioxidant Genes ◽  
Extrusion Processing ◽  
Short Term Study ◽  
Liver Structure

New sustainable feed ingredients are a necessity for the salmon aquaculture industry. In this study, we examined the effect of pre-extrusion processing of two microalgae, Nannochloropsis oceanica and Tetraselmis sp., on the growth, fatty acid content in the flesh and health of Atlantic salmon. The fish were fed one of the following five diets for nine weeks: (1) CO: a fish meal-based control (basal) diet, (2) NU: a Nannochloropsis diet, (3) NE: a pre-extruded Nannochloropsis diet, (4) TU: a Tetraselmis diet, and (5) TE: a pre-extruded Tetraselmis diet. The algae-incorporated diets contained 30% of the respective microalgae. Our results showed that the best growth performance was achieved by the CO diet, followed by the NE diets. Feeding of unprocessed Nannochloropsis and Tetraselmis resulted in a significant reduction in enterocyte vacuolization compared to the CO feeding. A significant effect of processing was noted in the fillet fatty acid content, the intestine and liver structure and the expression of selected genes in the liver. The expression of antioxidant genes in both the liver and intestine, and the accumulation of different fatty acids in the fillet and liver of the extruded algae-fed groups, warrants further investigation. In conclusion, based on the short-term study, 30% inclusion of the microalgae Nannochloropsis oceanica and Tetraselmis sp. can be considered in Atlantic salmon feeds.

scholarly journals Accuracy of selection for omega-3 fatty acid content in Atlantic salmon fillets

Aquaculture ◽  
2020 ◽  
Vol 519 ◽  
pp. 734767 ◽  
Author(s):  
Siri S. Horn ◽  
Theo H.E. Meuwissen ◽  
Hooman Moghadam ◽  
Borghild Hillestad ◽  
Anna K. Sonesson
Keyword(s):  
Fatty Acid ◽  
Atlantic Salmon ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Omega 3 ◽  
Omega 3 Fatty Acid ◽  
Selection For

scholarly journals Baking Reduces Prostaglandin, Resolvin, and Hydroxy-Fatty Acid Content of Farm-Raised Atlantic Salmon (Salmo salar)

2011 ◽  
Vol 59 (20) ◽  
pp. 11278-11286 ◽  
Author(s):  
Susan K. Raatz ◽  
Mikhail Y. Golovko ◽  
Stephen A. Brose ◽  
Thad A. Rosenberger ◽  
Gary S. Burr ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Acid Content ◽  
Hydroxy Fatty Acid ◽  
Fatty Acid Content ◽  
Atlantic Salmon Salmo Salar

Evaluation of fermented Alisma canaliculatum with probiotics as potential feed additives for finishing Hanwoo (Bos taurus coreanae) steers

2014 ◽  
Vol 54 (8) ◽  
pp. 1064 ◽  
Author(s):  
H. S. Mun ◽  
S. T. Ahmed ◽  
J. A. Hwang ◽  
Y. J. Kim ◽  
C. J. Yang
Keyword(s):  
Fatty Acid ◽  
Beef Cattle ◽  
Unsaturated Fatty Acid ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Carcass Characteristics ◽  
Basal Diet ◽  
Feed Additive ◽  
Meat Composition ◽  
Dietary Treatments

The present study was conducted to develop a functional feed additive, Alisma canaliculatum probiotic (ACP), for beef cattle, using the medicinal plant Alisma canaliculatum along with probiotic strains. A three-step fermentation process was developed for the manufacture of ACP. The effects of dietary ACP on growth performance, carcass characteristics, meat composition and oxidative stability in Hanwoo steers were investigated. Twenty-four Hanwoo steers (average 592.91 ± 10 kg bodyweight) were randomly assigned to three dietary treatments: control (basal diet), ACP 0.5% (basal diet + 0.5% ACP) and ACP 1.0% (basal diet + 1.0% ACP). Overall, dietary ACP resulted in significant elevation of bodyweight gain and feed efficiency compared with the control (P < 0.01). No significant differences in carcass characteristics were found among the dietary treatments, although carcass quality grade was improved by the ACP 0.5% diet (P = 0.007). Moisture, crude ash and crude protein contents were unaffected; however, crude fat and cholesterol contents were lower in steers fed ACP 0.5% (P < 0.05). Whereas the calcium of Hanwoo beef was unaffected by the dietary treatments, iron and magnesium contents were elevated by the ACP 0.5% diet compared with the control or ACP 1.0% diet (P < 0.01). Further, the ACP 0.5% diet improved the meat fatty acid profile by reducing saturated fatty acid content, especially myristic acid (P ≤ 0.05), as well as by increasing unsaturated fatty acid and n-3 polyunsaturated fatty acid content, especially α-linolenic acid (P < 0.10). The ACP diet was found to have positive effects on unsaturated fatty acid/saturated fatty acid and n-6/n-3 ratios (P ≤ 0.05). Thiobarbituric acid reactive substance values of the control group were higher compared with either of the ACP diet groups (P < 0.001). Overall, these data indicate that dietary ACP conferred beneficial effects on the growth performance, fatty acid profile, meat composition and oxidative stability in Hanwoo steers. Therefore, ACP may be used as a feed additive for beef cattle.

Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

1988 ◽  
Vol 46 ◽  
pp. 300-301
Author(s):  
C. S. Bricker ◽  
S. R. Barnum ◽  
B. Huang ◽  
J. G. Jaworskl
Keyword(s):  
Fatty Acid ◽  
Light Intensity ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Anabaena Variabilis ◽  
Chloroplast Envelope ◽  
Major Constituent ◽  
Filamentous Cyanobacterium ◽  
Photosynthetic Membrane ◽  
Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

Determination of fatty acid content in some edible insects of Mexico

2016 ◽  
Vol 2 (1) ◽  
pp. 37-42 ◽  
Author(s):  
J.M. Pino Moreno ◽  
A. Ganguly
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Acid Content ◽  
Periplaneta Americana ◽  
Fatty Acid Content ◽  
Capric Acid ◽  
Caproic Acid ◽  
Insect Species ◽  
Edible Insects

In the present paper we have determined the fatty acid content of some edible insects of Mexico. A comparative analysis of the insect species studied in this research showed that caproic acid was present in a minimal proportion which ranged between 0.01 for Periplaneta americana (nymphs) and 0.06 (g/100 g, dry basis) for Euschistus strenuus. The highest proportion of caprilic acid (0.09) was found in Tenebrio molitor (adults). Atta sp. had the highest amount of capric acid (0.26). Polistes sp. was found to be rich in lauric acid (0.77) and for myristic acid it had the highest content (5.64). Dactylopius sp. and E. strenuus were rich in palmitic acid (14.89). Euschistus taxcoensis had the highest quantity of palmitoleic acid (12.06). Llaveia axin exhibited the highest quantity of stearic acid (22.75). Polistes sp. was found to be rich in oleic acid (38.28). The highest quantity of linoleic acid was observed in T. molitor (larvae) (10.89), and in L. axin the highest content of linolenic acid (7.82) was obtained. A comparison between the species under the present investigation revealed that, in general, the insects are poor in caproic, caprilic, capric, lauric, myristic, palmitoleic and linolenic acids, because the quantities were either minimal or could not be detected at all. They had moderate quantities of stearic, palmitic and linoleic acids and had high quantities of oleic acid. Finally it was concluded that although a particular insect species is unable to fulfil the total fatty acid need for a human, if consumed in combination they could definitely be able to supply a good amount of this highly valued nutrient.

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