Feeding trashfish Odonus
niger lipid enriched Artemia nauplii on growth, stress resistance
and HUFA requirements of Penaeus monodon postlarvae
G. Immanuel, A. Palavesam, V. Sivaram, M. Michael
Babu, M.P. Marian-2004
Aquaculture, 237(1-4): 301-313
Abstract:
Artemia franciscana
nauplii (A to E) were enriched with different concentrations of emulsified Odonus
niger liver oil (0–4%). These enriched Artemia nauplii were fed
to postlarvae (PL5–PL20) of Penaeus monodon and assessed the
survival, growth, stress resistance and HUFA requirement. Maximum specific
growth rate of 24.55±0.287% was recorded in diet D and the minimum of 22.67±0.237%
in diet A fed individuals. Survival of P. monodon fed with lipid
enriched Artemia nauplii was higher than the control diet (A). The
salinity stress resistance (0 ppt) of P. monodon revealed that the
individuals fed with diet D were more stress-resistant (50 min) than those
that received other diets (40–45 min). At high salinity (50 ppt), diets D
and E fed individuals survived up to 480 min, whereas in other diets (A, B
and C), the larvae survived up to 420 min. In both low and high salinities,
a cumulative mortality index (CMI) of 121±0.816 and 91.66±0.942 was
recorded for diet A fed groups and it was reduced by 15.14±0.930% and 21.44±0.450%
for those fed diet D. The fatty acid profile of the Artemia nauplii
enriched with selected concentrations (0–4%) of O. niger liver oil
was varied remarkably. The PUFA showed an increasing trend in enriched Artemia
nauplii ranging from 32.41% (by weight) in control (A) to 46.16% (by weight)
in 3% (D) lipid. Similarly, the PUFA of P. monodon postlarvae
(PL5–PL20) fed with the lipid enriched Artemia nauplii were
increased from 29.72% (by weight) in control (A) to 44.13% (by weight) in
postlarvae received 3% (D) lipid enriched Artemia nauplii. The
overall performance of growth enhancement, stress tolerance and fatty acid
profile of P. monodon revealed that P. monodon postlarvae fed
with D (3% lipid) were more efficient than the other groups.
(Marine Biotechnology Division, Centre for Marine
Science and Technology, M. S. University, Rajakkamangalam-629 502, K.K.
District, Tamil Nadu, India, e-mail: g_immas@yahoo.com)