There was a significant inverse linear relation between stocking density (SD) and special growth rate (SGR) [SGR=4.9728-0.4914×SD(r=-0.6553)]. And there was a significant positive linear relation between growth efficiency (GE) and water velocity (V) [GE=46.106+142.04V(r=0.5216)].

Within a range of water temperature of 16.7-22.5℃,growth efficiency(GE)and daily growth rate(DGR) increased with the increase of velocity of water current,and maximum DGRoccurred inV3group. There was significant positive linear relation betweenGEandV:GE=52.5 V +69.567(R2=0.997,P<0.05),when the velocity of water current ranged from0.12 m.

The body weight was evaluated by the body length. Under the different temperatures (35, 30, 28, 25, 25±5, 20 and 17℃) and salinities (3, 5, 10, 30, 40 and 50‰) , growth and oxygen consuming rate of Moina mongolica were determined.

Because the metabolism and growth energy of Sparus macrocephalusr are respectively 69.72%～93.28% or 6.72%～30.28% of its assimilation energy , it should belong to fish of lower gro wth efficiency and higher metabolism consumption.

Because metabolism and growth energy of Sparus macrocephalus takes 83.25%～91.70% and 8.30%～16.75% of assimilation energy respectively,it should belong to the fish of lower growth efficency and higher metabolism consumption.

Two new parameters, the maximum specific uptake rate (Vmsp) and the maximal growth efficiency (β), are introduced to achieve uniformity for the comparison of nutrient uptake and growth efficiency between microalgae and macroalgae.

pertusa possesses 4 times higher maximal growth efficiency than T.

Fish defending large patches had a low growth efficiency, apparently because of the social stress caused by intruders in their territories.

The energetics and growth efficiency of Aphis fabae Scop.

The growth efficiency on a synthetic diet was 20% compared with a value of 50% on plants.

In this research, the direct weighing method was used to weigh Moina mongolica of different body length groups. A regression equation of body length to body weight (Inw=3.60906InL-20.2694566) was obtaind by using statistical method. The body weight was evaluated by the body length. Under the different temperatures (35, 30, 28, 25, 25±5, 20 and 17℃) and salinities (3, 5, 10, 30, 40 and 50‰) , growth and oxygen consuming rate of Moina mongolica were determined. The results indicate: within the extent of suitable...

In this research, the direct weighing method was used to weigh Moina mongolica of different body length groups. A regression equation of body length to body weight (Inw=3.60906InL-20.2694566) was obtaind by using statistical method. The body weight was evaluated by the body length. Under the different temperatures (35, 30, 28, 25, 25±5, 20 and 17℃) and salinities (3, 5, 10, 30, 40 and 50‰) , growth and oxygen consuming rate of Moina mongolica were determined. The results indicate: within the extent of suitable temperature, the growth of Moina mongolica is sped up as temperature increases, fastest at 25±5℃, next at the constant temperatures 28 and 30℃; the oxygen consuming rate declines as the body weight increases, and rises with temperature; Moina mongolica growth relatively faster at the salinities of 30 and 20-30‰ although it has wide adaptability to the variation of salinity; the oxygen consuming rate tends to increase with temperature when salinity is lower than 20‰, and decrease with temperature when salinity is higher than 20‰, highest at 20-30‰; index of assimilation is maximum at 20‰, second at 30‰, and minimum at 3,5,10‰ in salinity; growth rate of tissues (K_2) is maximum at 3‰, second at 5‰, minimum at 20‰ in salinity.

Four groups of Tilapia nilotica were fed in different ranges of temperature (constant temperature of 28℃ and 30℃; periodic fluctuating temperature of 28±4℃ and 30±4℃)in the laboratory. The increasing body weight and oxygen consuming rate were measured. The energy assimilating rate and tissue growing rate (K_2) were calculated. The results indicated that the growth of fluctuating temperature groups was faster, and the daily increase weight and percentage increase weight were higher than that of the controlled...

Four groups of Tilapia nilotica were fed in different ranges of temperature (constant temperature of 28℃ and 30℃; periodic fluctuating temperature of 28±4℃ and 30±4℃)in the laboratory. The increasing body weight and oxygen consuming rate were measured. The energy assimilating rate and tissue growing rate (K_2) were calculated. The results indicated that the growth of fluctuating temperature groups was faster, and the daily increase weight and percentage increase weight were higher than that of the controlled ones. In addition, the energy assimilating rate and tissue growing rate in the fluctuating temperature groups were higher than that of the controlled groups, except that the tissue growing rate in the fluctuating temperature group at 30±4℃ was lowest. The mechanism that fluctuating temperature promoted the growth of Tilapia nilotic(?) and its significance in productive practice were discussed and analysed.

Fine scale fish is a kind of precious economic coldwater fish. In this report, we found the growth equation of this fish is: L_t=71.5 (1-e~((-0.1156)(t-0.0711)) and W_t=3235 (1-e~~((-0.1312)(t-0.0711))~3. The relationship between the length and weight of this fish is W=0.01776 L~(2·8369). The relationship between maximum day energy intake (DEImax) and weight is DEImax=0.024W~(1·2340) and the relationship between ecological growth efficiency () and weight is W=3.3114w~(-0.4278). The relationship between maintenance...

Fine scale fish is a kind of precious economic coldwater fish. In this report, we found the growth equation of this fish is: L_t=71.5 (1-e~((-0.1156)(t-0.0711)) and W_t=3235 (1-e~~((-0.1312)(t-0.0711))~3. The relationship between the length and weight of this fish is W=0.01776 L~(2·8369). The relationship between maximum day energy intake (DEImax) and weight is DEImax=0.024W~(1·2340) and the relationship between ecological growth efficiency () and weight is W=3.3114w~(-0.4278). The relationship between maintenance metabolism energy (MME) and weight is MME=0.03828w~(0.8443). The relationship between day energy growth (G) and day energy intake (DEI) can be described as G=a+bDEI.By analysing, we established the energy budget of fine Scale fish of 3 size groups in 7%, 5%, 2.5% and 1% feeding levels according to winberg formula C+G+ (F+U). The feeding level should not be lowwer than 5% in fish farming for fine scale fish.