RELATIONSHIPS AMONG DIETARY LIPIDS, TISSUE LIPIDS, AND GROWTH IN JUVENILE LOBSTERS

Academic Article

Abstract

  • The inclusion of oils (6% dry weight) in a purified diet fed to juvenile lobsters for 60 days caused a significant increase in growth. When four purified diets containing tuna, corn, or cod liver oils in various combinations were fed to juvenile lobsters for 120 days, no significant differences in growth were observed. Growth data do suggest that the inclusion of oils rich in ω3 polyunsaturated fatty acids could significantly increase growth rates. Juvenile lobsters fed purified diets stored large amounts of lipid in the hepatopancreas, 21.5 to 25.6% of the hepatopancreatic wet weight. Only 1.01 to 3.23% of the remaining body weight was lipid. The inclusion of marine fish oils in the purified diets affected lipid deposition and metabolism. The lipid extracted from the hepatopancreas had neutral/polar ratios averaging 3.4; lipids extracted from the remaining parts had ratios averaging 0.6. In general the fatty acid composition of the neutral and polar lipids of the hepatopancreas and remaining bodies reflected that of the purified diets. Polyunsaturated fatty acids, particularly 20:5ω3 and 22:6ω3 derived from the oil ingredients, were accumulated and preferentially incorporated into the polar lipid of the remaining body. Data suggest the presence of a biosynthetic pathway whereby neutral lipids are formed from polar lipids as well as the lobster's poor ability to produce polyunsaturated fatty acids via elongation and desaturation reactions of pre‐existing compounds. © 1980 World Aquaculture Society
  • Authors

    Digital Object Identifier (doi)

    Author List

  • D'Abramo LR; Bordner CE; Daggett GR; Conklin DE; Baum NA
  • Start Page

  • 335
  • End Page

  • 345
  • Volume

  • 11
  • Issue

  • 1-4