Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/20472
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Effect of krill phospholipids versus soybean lecithin in microdiets for gilthead seabream (Sparus aurata) larvae on molecular markers of antioxidative metabolism and bone development
Authors: Saleh, Reda
Betancor, Monica
Roo, Javier
Benitez-Dorta, Vanessa
Zamorano, Maria J
Bell, J Gordon
Izquierdo, Marisol S
Contact Email: m.b.betancor@stir.ac.uk
Keywords: bone development
krill phospholipids, soybean lecithin
larval performance
oxidative stress
seabream
Issue Date: Aug-2015
Publisher: Wiley-Blackwell
Citation: Saleh R, Betancor M, Roo J, Benitez-Dorta V, Zamorano MJ, Bell JG & Izquierdo MS (2015) Effect of krill phospholipids versus soybean lecithin in microdiets for gilthead seabream (Sparus aurata) larvae on molecular markers of antioxidative metabolism and bone development, Aquaculture Nutrition, 21 (4), pp. 474-488.
Abstract: The objective of the present study was to compare the effectiveness of dietary marine phospholipids (MPL) obtained from krill and soybean lecithin (SBL) on the rearing performance and development of seabream (Sparus aurata) larvae. Larvae were fed from 16 to 44 day posthatching (dph) five formulated microdiets with three different levels (50, 70 and 90 g kg-1) of phospholipids (PL) obtained either from an MPL or from a SBL source. Larvae-fed MPL show a higher survival, stress resistance and growth than those-fed SBL, regardless the dietary PL level. Overall, the increase in MPL up to 70 g kg-1 total PL in diet was enough to improve larval gilthead seabream performance, whereas even the highest SBL inclusion level (90 g kg-1 PL) was not able to provide a similar success in larval growth or survival. Inclusion of SBL markedly increased the peroxidation risk as denoted by the higher TBARs in larvae, as well as a higher expression of CAT, GPX and SOD genes. Moreover, SBL tends to produce larvae with a lower number of mineralized vertebrae and a lower expression of osteocalcin, osteopontin and BMP4 genes. Finally, increasing dietary MPL or SBL lead to a better assimilation of polyunsaturated fatty acids in the larvae, n-3HUFA (especially 20:5n-3) or n-6 fatty acids (especially 18:2n-6), respectively. In conclusion, MPL had a higher effectiveness in promoting survival, growth and skeletal mineralization of gilthead seabream larvae in comparison with SBL.
Type: Journal Article
URI: http://hdl.handle.net/1893/20472
DOI Link: http://dx.doi.org/10.1111/anu.12177
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Universidad de Las Palmas de Gran Canaria
Aquaculture
Universidad de Las Palmas de Gran Canaria
Universidad de Las Palmas de Gran Canaria
Universidad de Las Palmas de Gran Canaria
Aquaculture
Universidad de Las Palmas de Gran Canaria

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