scholarly journals The Influence of Temperature of Irrigation Water upon the Growth of Paddy Rice in the Warmer District. : IV. On the Influence of Water Temperature at Tillering Period upon the Growth of Rice.

1959 ◽  
Vol 27 (4) ◽  
pp. 426-428
Author(s):  
Kenji UEKI
Keyword(s):  
Water Temperature ◽  
Irrigation Water ◽  
Paddy Rice ◽  
Influence Of Temperature ◽  
Influence Of Water

Influence of Water Temperature on the Growth Rate of the Landlocked Sea Lamprey (Petromyzon marinus) and the Associated Rate of Host Mortality

1977 ◽  
Vol 34 (9) ◽  
pp. 1373-1378 ◽  
Author(s):  
G. J. Farmer ◽  
F. W. H. Beamish ◽  
P. F. Lett
Keyword(s):  
Growth Rate ◽  
Great Lakes ◽  
Water Temperature ◽  
Growth Rates ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Instantaneous Growth ◽  
Exponential Decline ◽  
Influence Of Water ◽  
Host Mortality

Groups of sea lampreys (Petromyzon marinus) of 10–90 g initial weight were held at temperatures of 1–20 °C for 30 days and allowed to feed ad lib. on white suckers (Catostomus commersoni). Increases in water temperature and in lamprey size caused the rate of host mortality to increase in agreement with observations that mortality in the Great Lakes is seasonal. Instantaneous growth rates were maximal at 20 °C for lampreys of 10–30 g, the optimal temperature for growth shifting to 15 °C for larger lampreys of 30–90 g. Growth rates were intermediate at 10 °C and lowest at 4 °C for lampreys of all size. Accordingly, host mortality increased with temperature over the 4–20 °C range. At all experimental temperatures, increases in lamprey weight were accompanied by an exponential decline in instantaneous growth rates, a phenomenon also observed for teleosts. Laboratory growth rates at temperatures of 5–15 °C were comparable to rates observed for lampreys in Lake Huron between April and November and agree with the observation that lampreys feed in deeper waters between April and June before moving to warmer, shallower waters during the summer when growth rate increases. Key words: sea lamprey, white sucker, host, temperature, growth, Great Lakes, mortality

scholarly journals Weed control method for paddy rice through the application of several formulations using irrigation water.

1995 ◽  
Vol 40 (1) ◽  
pp. 47-49
Author(s):  
Nobumasa Ichizen ◽  
Hitoshi Kuramochi ◽  
Makoto Konnai ◽  
Haruki Innami ◽  
Satoru Oobuchi
Keyword(s):  
Weed Control ◽  
Irrigation Water ◽  
Control Method ◽  
Paddy Rice
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