Effects of dietary phospholipids and highly unsaturated fatty acids on the precocity, survival, growth and hepatic lipid composition of juvenile Chinese mitten crab, Eriocheir sinensis (H. Milne-Edwards)
- 8 October 2010
- journal article
- Published by Hindawi Limited in Aquaculture Research
- Vol. 42 (3), 457-468
- https://doi.org/10.1111/j.1365-2109.2010.02643.x
Abstract
Precocious puberty is one of the major constraints to the further development of Chinese mitten crab (Eriocheir sinensis) farming industry. Although dietary phospholipids (PL) and highly unsaturated fatty acids (HUFA) supplementation have been shown to enhance the growth of larval E. sinensis in other studies, it is still unknown whether this also leads to a higher precocity rate for juvenile E. sinensis. This study was conducted to investigate the effects of dietary PL and HUFA on precocity, survival, growth and hepatic lipid composition of juvenile E. sinensis. Two diets were formulated with PL [3.95% dry weight (DW)] and HUFA (0.98% DW) supplementation (diet A) and without PL and HUFA supplementation (diet B) and fed to juvenile E. sinensis. Although dietary PL and HUFA levels did not significantly affect the survival and growth performance of juvenile E. sinensis, compared with crabs fed diet A, a higher precocity rate was found among juvenile E. sinensis fed diet B (P=0.051). A higher total lipid content, but significantly lower levels of HUFA and PL (P<0.05) were found in the hepatopancreas of crabs fed diet B than in those fed diet A. Meanwhile, the precocious females had significantly lower hepatosomatic index, arachidonic acid (20:4n-6), eicosapentaenoic acid (20:5n-3) and docosahexaenoic acid (22:6n-3) contents in their hepatopancreas when compared with that of the normal immature juveniles (P<0.05). The results suggest that the occurrence of precocious puberty among farmed juvenile E. sinensis could be reduced by the inclusion of appropriate level of dietary PL and HUFAKeywords
This publication has 26 references indexed in Scilit:
- The effect of dietary n-3 HUFA levels and DHA/EPA ratios on growth, survival and osmotic stress tolerance of Chinese mitten crab Eriocheir sinensis larvaeAquaculture, 2007
- Dietary value of different vegetable oil in black tiger shrimp Penaeus monodon in the presence and absence of soy lecithin supplementation: Effect on growth, nutrient digestibility and body compositionAquaculture, 2005
- Essential fatty acids for larval mud crab Scylla serrata: implications of lack of the ability to bioconvert C18 unsaturated fatty acids to highly unsaturated fatty acidsAquaculture, 2003
- Effect of dietary phospholipid on essential fatty acid requirements and tissue lipid composition of Litopenaeus vannamei juvenilesAquaculture, 2002
- Growth, survival and fatty acid composition of juvenile Litopenaeus vannamei fed different oils in the presence and absence of phospholipidsAquaculture, 2002
- Lipid nutrition of juvenile Litopenaeus vannamei: I. Dietary cholesterol and de-oiled soy lecithin requirements and their interactionAquaculture, 2000
- Performance of Macrobrachium rosenbergii broodstock fed diets with different fatty acid compositionAquaculture, 1999
- Effects of protein level in isocaloric diets on growth performance of the juvenile Chinese hairy crab, Eriocheir sinensisAquaculture, 1998
- Effect of dietary phospholipid on requirements for and incorporation of n − 3 highly unsaturated fatty acids in postlarval Penaeus japonicus BateAquaculture, 1997
- The cholesterol and lecithin requirements of juvenile prawn (Macrobrachium rosenbergii) fed semi-purified dietsAquaculture, 1988