Changes in lipid
class and fatty acid composition of adult male Litopenaeus vannamei
(Boone) in response to culture temperature and food deprivation
M. Perez-Velazquez, M.L. González-Félix,
A.L. Lawrence, D.M. Gatlin III-2003
Aquaculture Research, 34(13):
1205-1213
Abstract:
The effects of culture temperature and
food deprivation on lipid class and fatty acid composition of adult male Litopenaeus
vannamei (Boone) were investigated. Shrimp were maintained in
recirculating seawater systems at temperatures of 26 and 32°C and fed 75%
dry commercial feed and 25% fresh-frozen squid for 42 days. Additionally,
groups of fed and non-fed shrimp were maintained at 26°C for 17 days. In
shrimp fed at either 26 or 32°C, polar lipids were the main constituents of
total identified lipid classes in muscle tissue (66-71%), while neutral
lipids were more abundant in hepatopancreas (82-88%). Higher levels of
triglycerides were observed in lipids of shrimp hepatopancreas kept at 32°C,
but no other lipid class was affected by temperature. A significantly higher
proportion of 22:6n-3 was consistent in muscle and hepatopancreas polar and
neutral lipids of shrimp maintained at 26°C. In response to food
deprivation, the amount of polar lipids, but not neutral lipids, was reduced
by approximately 28% in muscle tissue, whereas all lipid reserves were
almost depleted in the hepatopancreas. The variable consumption of some
individual fatty acids was observed in polar and neutral lipids of both
tissues.
(Departamento de Investigaciones Científicas
y Tecnológicas, Universidad de Sonora, Rosales y Niños Héroes s/n AP 1819
CP 83000, Hermosillo, Sonora, México. E-mail: mperezv@correom.uson.mx)