EFFECTS OF SALINITY AND DIETARY CARBOHYDRATE LEVELS
ON GROWTH AND ENERGY BUDGET OF JUVENILE LITOPENAEUS
VANNAMEI
X. Wang, S. Ma, S. Dong, M. Cao-2004
Journal
of Shellfish Research, 23(1): 2331-236
Abstract:
The Culture of Litopenaeus vannamei in
low-salinity waters is now popular in many regions of the world. A 6 x 3
factorial experiment was conducted to determine the effects of salinities
(tap water, 1 ppt, 2 ppt, 4 ppt, 8 ppt, and 16 ppt) and dietary carbohydrate
levels (15.47%, 29.15%, and 41.00%) on survival, growth, food consumption,
food efficiency, absorption efficiency, and energy budget of juvenile L. vannamei. The
results showed that no shrimp survived in tap water at the end of the
experiment irrespective of dietary carbohydrate (CBH). At each dietary CBH
level, the specific growth rate (SGR), food consumption, and food efficiency
generally increased with increasing salinity within the range of 1-Me. At
salinities of l
ppt, 2 ppt,
4 ppt, 8 ppt, and l6 ppt, optimal CBH levels corresponding to maximum SGR
decreased with increasing salinity and were 29.87%, 27.59%, 26.85%, 26.25%, and 22.29%, respectively. At 1-8 ppt, the percentage of consumed energy deposited in
growth (%C) was significantly higher in shrimps fed 29.15% CBH as compared
with other treatments, whereas at 16 ppt, the significantly higher value was
in those fed 15.47% CBH.
(Mariculture
Research Laboratory, Fisheries College, Ocean University of China, Qingdao,
266003, People's Republic of China, e-mail of S. Ma: mashen@mail.ouc.edu.cn)