Effects of temperature on food consumption, growth and oxygen
consumption of freshwater prawn Macrobrachium rosenbergii (de Man
1879) postlarvae
C. Niu, D. Lee, S. Goshima, S. Nakao-2003
Aquaculture
Research, 34(6): 501
Abstract:
Effects
of temperature on food consumption, growth and oxygen consumption were
estimated for the freshwater prawn Macrobrachium rosenbergii
postlarvae at 23 °C, 28 °C and 33 °C in the laboratory.
The results showed that the animal's initial body weight had a close linear
relationship with food consumption and growth. Food consumption increased
directly with temperature. Consumption rates (C; mg day
-1
ind
-1 )
of the 28 °C and 33 °C groups were much higher than that of the
23 °C group (P < 0.001), and the 33 °C
group's consumption rate was higher than that of the 28 °C group (P < 0.05).
The relationship of food consumption with temperature and initial body
weight (W; mg) could be described as: C = 0.0679W +
0.185t - 3.17. Growth increased significantly with increased temperature. The
relationship among specific growth rate, temperature and initial body weight
was as follows: SGR =
-0.110W +
0.213t + 0.176. However, temperature showed no effect on
growth efficiency. Oxygen consumption increased significantly with
temperature (P < 0.01). The weight-specific oxygen
consumption rates (mg O2 g
-1 h
-1)
at 23 °C, 28 °C and 33 °C were 0.83, 1.16 and 1.49 mg
O2 g
-1 h
-1
for 61.92 mg M. rosenbergii.
(College of Life Sciences, Beijing Normal
University, Beijing, 100875, P. R. China. E-mail: cjniu@bnu.edu.cn)