Normal rate of development.

2011 ◽  
pp. 80-102
Author(s):  
Lovisa C. Wagoner
Keyword(s):  
Normal Rate ◽  
Rate Of Development

Quantitative dietary requirements of Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) for phenylalanine and tyrosine

1968 ◽  
Vol 46 (3) ◽  
pp. 469-473 ◽  
Author(s):  
G. R. F. Davis
Keyword(s):  
Relative Humidity ◽  
Normal Rate ◽  
Oryzaephilus Surinamensis ◽  
Adult Weight ◽  
Rate Of Development ◽  
Dietary Requirements ◽  
Emergent Adults

Oryzaephilus surinamensis (L.), reared on three holidic diets at 32 ± 2 °C and 75 ± 5% relative humidity, required a dietary source of phenylalanine, irreplaceable by dietary tyrosine. This insect also required a dietary source of tyrosine for normal rate of development. On diets containing 1.0 mg of phenylalanine per gram, it used supplementary glycine more effectively than supplementary tyrosine as a replacement for phenylalanine omitted from the diet. On diets containing 1.0 mg of tyrosine per gram, it used supplementary phenylalanine more effectively than glycine. Emergent adults weighed less with 1.0 mg of dietary phenylalanine per gram than with higher concentrations. Adult weight was unaffected by decreasing concentrations of dietary tyrosine.

Analysis of the rates of development and growth of Brachymystax lenok Savinovi during artificial reproduction by the industrial method

2020 ◽  
pp. 40-49
Author(s):  
S. Assylbekova ◽  
N. Badryzlova ◽  
L. Kushnikova
Keyword(s):  
Water Temperature ◽  
Fish Reproduction ◽  
Optimal Conditions ◽  
Artificial Reproduction ◽  
Fish Products ◽  
Rate Of Development ◽  
Stage Of Development ◽  
East Kazakhstan ◽  
Brachymystax Lenok ◽  
The Moment

The article presents the results of the first research on artificial reproduction in industrial conditions of the endemic, narrow-areal subspecies of Brachymystax lenok Savinovi, which lives in lake Markakol, East Kazakhstan region. The indicators of the heat sum characteristic for each stage of development, the rate of development and growth of the Markakolsky lenok from the moment of pre-breeding to late juveniles are described. To develop technological approaches for artificial fish reproduction, one of the most important points is to determine the optimal conditions for each stage and assess the risks (loss of fish products). At the stage of insemination and transportation of eggs to the place of incubation, the loss was 50 %. The largest losses of fish products were registered during the incubation stage. The most painlessly passed the period of holding and lifting on the float, where the loss was only 3 %. When growing pre-larvae and larvae in the pool, the daily waste did not exceed 1 %. Small-sized animals that were unable to adapt to artificial feeds fell into the waste. Losses during this period amounted to 15 % of the previous stage. In General, the yield of juveniles from the moment of fertilization to the end of the experiment was 16 %. The crucial factor in the development and growth of Lenok Markakolosky is the temperature regime. For the period of embryonic development, the most favorable water temperature is 7–8 °C. From the moment of hatching, the water temperature must be increased to 10–12 °C, and the optimal temperature for the cage growing of fingerlings varies from 12 to 14 °C.

Effects of rate of development of in vitro-produced ovine embryos on sex ratio and in vivo survival after embryo transfer

1997 ◽  
Vol 48 (8) ◽  
pp. 1369-1378 ◽  
Author(s):  
S.L. Catt ◽  
J.K. O'Brien ◽  
W.M.C. Maxwell ◽  
G. Evans
Keyword(s):  
Sex Ratio ◽  
Embryo Transfer ◽  
Rate Of Development

Yields of mixtures of single-cross hybrid field beans (Viciafaba L.) with one of the parental inbred lines

1966 ◽  
Vol 67 (2) ◽  
pp. 235-237 ◽  
Author(s):  
D. A. Bond ◽  
J. L. Fyfe ◽  
Gillian Toynbee-Clarke
Keyword(s):  
Inbred Lines ◽  
The Other ◽  
Normal Rate ◽  
Single Cross ◽  
Parental Inbred ◽  
The Mean ◽  
Field Beans

The yields of seed from a hybrid, one of its parents and different mixtures of the hybrid and parent were compared in the case of two different hybrids. Open-pollinated controls were included in the trial, which was sown at about the normal rate for beans. With both hybrids a mixture of 11 of hybrid to 1 of parent yielded as well as the hybrid itself and mixtures of 2 of hybrid to 1 of parent yielded in both cases about 7 cwt./acro more than the mean of the open-pollinated controls. With the higher-yielding hybrid, which had less contrast in vegetative vigour between hybrid and parent, mixtures in the proportions 5:1 and 2:1 showed declining yields, but with the other hybrid they yielded as well as the pure hybrid.

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