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GROWTH AND VARIATIONS IN LIPID CLASS AND FATTY ACID COMPOSITION DURING LARVAL DEVELOPMENT OF THE STONE CRAB, MENIPPE ADINA WILLIAMS AND FELDER, 1986
Citation:
Nates, S. F. AND C L. McKenney Jr. GROWTH AND VARIATIONS IN LIPID CLASS AND FATTY ACID COMPOSITION DURING LARVAL DEVELOPMENT OF THE STONE CRAB, MENIPPE ADINA WILLIAMS AND FELDER, 1986. INVERTEBRATE REPRODUCTION AND DEVELOPMENT 37(2):157-165, (2000).
Description:
Larval development in decapod crustaceans is marked by variable growth patterns and changes in weight and biochemical composition. Larvae of the stone crab, Menippe adina, were mass-reared under laboratory conditions (28|C; 20o/ooS) from hatching to the megalopal stage. Growth in M. adina is exponential throughout the zoeal stages (y=10.395e01592x, R2=0.98). Dry weight increased by 16-fold from the first to fifth zoeal stage (ZI-ZV), and by day 22, the average weight for megalops was 272.5|48.6 |g. Iatroscan lipid class analysis revealed that polar lipids (>64%) and neutral lipids of which steryl esters (>20%) were dominant, represent the major lipid classes in larvae at every stage. Free fatty acids and free sterols were present in small amounts. Triacylglycerols represented on average 8% of all neutral lipids. Total lipids of zoeae and megalops contained palmitic (16:0), stearic (18:0), oleic (18:1w9) and eicosapentaenoic (20:5w3) acids as the major fatty acids. Proximate biochemical composition revealed conspicuous variations during metamorphosis with an increase in the proportions of lipid content and saturated fatty acids from ZI to ZIV, a decrease during the ZV stage and an increase in the megalopa.