scholarly journals Effects of water temperature changes on the endogenous and exogenous rhythms of oxygen consumption in glass eels Anguilla japonica

2002 ◽  
Vol 243 ◽  
pp. 209-216 ◽  
Author(s):  
WS Kim ◽  
SJ Yoon ◽  
HT Moon ◽  
TW Lee
Keyword(s):  
Oxygen Consumption ◽  
Water Temperature ◽  
Anguilla Japonica ◽  
Temperature Changes ◽  
Glass Eels

scholarly journals Comparison of Invasive Apple Snail (Pomacea canaliculata) Behaviors in Different Water Temperature Gradients

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1149
Author(s):  
Mi-Jung Bae ◽  
Eui-Jin Kim ◽  
Young-Seuk Park
Keyword(s):  
Water Temperature ◽  
Farming Systems ◽  
Freshwater Snail ◽  
Freshwater Ecosystems ◽  
Pomacea Canaliculata ◽  
Activity Levels ◽  
Self Organizing Map ◽  
Apple Snail ◽  
Temperature Changes ◽  
Organic Farming Systems

Pomacea canaliculata (known as invasive apple snail) is a freshwater snail native to South America that was introduced into many countries (including Asia and North America) as a food source or for organic farming systems. However, it has invaded freshwater ecosystems and become a serious agricultural pest in paddy fields. Water temperature is an important factor determining behavior and successful establishment in new areas. We examined the behavioral responses of P. canaliculata with water temperature changes from 25 °C to 30 °C, 20 °C, and 15 °C by quantifying changes in nine behaviors. At the acclimated temperature (25 °C), the mobility of P. canaliculata was low during the day, but high at night. Clinging behavior increased as the water temperature decreased from 25 °C to 20 °C or 15 °C. Conversely, ventilation and food consumption increased when the water temperature increased from 25 °C to 30 °C. A self-organizing map (an unsupervised artificial neural network) was used to classify the behavioral patterns into seven clusters at different water temperatures. These results suggest that the activity levels or certain behaviors of P. canaliculata vary with the water temperature conditions. Understanding the thermal biology of P. canaliculata may be crucial for managing this invasive snail.

The water temperature changes the effect of pH on copper toxicity to the green microalgae Raphidocelis subcapitata

Chemosphere ◽  
2021 ◽  
pp. 133110
Author(s):  
Gissela Pascual ◽  
Daisuke Sano ◽  
Takashi Sakamaki ◽  
Michihiro Akiba ◽  
Osamu Nishimura
Keyword(s):  
Water Temperature ◽  
Copper Toxicity ◽  
Green Microalgae ◽  
Effect Of Ph ◽  
Temperature Changes ◽  
Raphidocelis Subcapitata

Regulation of Heat Production by Large Moths

1967 ◽  
Vol 47 (1) ◽  
pp. 21-33
Author(s):  
JAMES EDWARD HEATH ◽  
PHILLIP A. ADAMS
Keyword(s):  
Oxygen Consumption ◽  
Heat Loss ◽  
Low Temperatures ◽  
Cooling Curve ◽  
O2 Consumption ◽  
Internal Temperature ◽  
Warm Up ◽  
Temperature Changes ◽  
Thoracic Temperature ◽  
Silk Moth

1. Moths ‘warm-up’ prior to flight at mean rates of 4.06° C./min. in Celerio lineata and 2.5° C./min. in Rothschildia jacobae. The abdominal temperature rises only 2-3° C. during activity. 2. Oxygen consumption of torpid sphinx moths increases by a factor of 2.27 as temperature changes from 26° to 36° C. 3. Oxygen consumption during ‘warm-up’ increases with duration of ‘warm-up’ from about 1000 µl./g. min during the initial 30 sec. to nearly 1600µl./g. min. during the 3rd min. This increase compensates for increasing heat loss from the thorax during ‘warm-up‘. 4. When the moths are regulating thoracic temperature, oxygen consumption increases with decreasing air temperature from a mean of about 400µl./g. min at 31° C. to about 650µl./g. min. at 26° C 5. Values of O2 consumption calculated from the cooling curve of C. lineata are about 85% of the measured values of O2 consumption. 6. The giant silk moth, Rothschildia jacobae, regulates thoracic temperature during activity between about 32° and 36° C. at ambient temperature from 17° to 29° C. Moths kept at high temperatures are active longer, have more periods of activity and expend more energy for thermoregulation than moths kept at low temperatures. 7. Large moths increase metabolism during active periods to offset heat loss and thereby maintain a relatively constant internal temperature. In this regard they may be considered endothermic, like birds and mammals. 8. We estimate that male moths use 10% of their stored fat for thermoregulation, while females may use 50%.

scholarly journals Immigration Period and Age of Anguilla japonica Glass-eels Entering Rivers in Northern Kyushu, Japan during 1994

1998 ◽  
Vol 64 (2) ◽  
pp. 235-239 ◽  
Author(s):  
Yutaka Kawakami ◽  
Noritaka Mochioka ◽  
Akinobu Nakazono
Keyword(s):  
Anguilla Japonica ◽  
Glass Eels

Decomposition of Seston in the Hyolimnion

1987 ◽  
Vol 44 (1) ◽  
pp. 146-151 ◽  
Author(s):  
R. J. Cornett ◽  
F. H. Rigler
Keyword(s):  
Oxygen Consumption ◽  
Water Temperature ◽  
Water Column ◽  
Chlorophyll A ◽  
Significant Fraction ◽  
Oxygen Deficit ◽  
Total Oxygen ◽  
Respiration Rates ◽  
Hypolimnetic Oxygen

In 12 lakes a significant fraction of the hypolimnetic oxygen deficit was produced by the respiration of seston in the hypolimnetic water column. Mean summer seston respiration rates ranged between 4 and 80 mg O2∙m−3∙d−1. Rates of seston respiration were proportional to the in situ water temperature and to the concentration of Chlorophyll a. The amount of oxygen consumed in the water column and the fraction of the total oxygen deficit produced by sestonic respiration were correlated with the amount of phosphorus sedimented from the epilimnion. Fifteen to 66% of the total oxygen consumption occurred in the water column of the hypolimnion. Seston respiration was a larger proportion of the total respiration in the hypolimnion of lakes with a thick hypolimnion than in lakes with a shallow hypolimnetic water column.

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