Effects of temperature acclimation on infection of Echinocephalus sinensis (Nematoda: Gnathostomatidae) from oysters to kittens

1977 ◽  
Vol 55 (7) ◽  
pp. 1129-1132 ◽  
Author(s):  
Ronald C. Ko
Keyword(s):  
Ambient Temperature ◽  
Crassostrea Gigas ◽  
Temperature Acclimation ◽  
Boiling Water ◽  
Third Stage ◽  
Effects Of Temperature ◽  
The Tropics

About 700 oysters (Crassostrea gigas) were acclimated in the laboratory to 33, 28, 20–24, 15, and 5 °C. Third-stage larvae of Echinocephalus sinensis Ko, 1975 recovered from the tissues of these molluscs were fed to 31 kittens which were examined 18 h postinfection. The number of successful infections produced and the number of worms located in tissues of kittens were found to be directly related to the ambient temperature of the molluscan host. Substantial infections were obtained only with worms from 33 and 28 °C. Worms could be effectively killed if the infected oysters were deep fried with batter for 7 s or dipped in boiling water for 30 s. The possibility of finding other nematodes of poikilotherms similar to E. sinensis in the tropics is briefly discussed.

THE EFFECTS OF TEMPERATURE ON THE SURVIVAL AND DEVELOPMENT OF THE FREE-LIVING STAGES OF TRICHOSTRONGYLUS RETORTAEFORMIS ZEDER (NEMATODA)

1961 ◽  
Vol 39 (1) ◽  
pp. 47-53 ◽  
Author(s):  
S. P. Gupta
Keyword(s):  
Escherichia Coli ◽  
Ambient Temperature ◽  
Infective Stage ◽  
Free Living ◽  
Infective Larvae ◽  
Third Stage ◽  
Survival And Development ◽  
Pure Cultures ◽  
Effects Of Temperature

The effects of temperature on the survival and development of the free-living stages of Trichostrongylus retortaeformis have been studied using agar cultures inoculated with pure cultures of Escherichia coli. The ova hatched and infective larvae developed at temperatures ranging from 5 °C to 30 °C, but 35 °C was lethal in 24 hours. The time of development of the larvae to the infective stage was inversely proportional to the ambient temperature between the limits of 10 °C and 30 °C. The longevity in water of third-stage larvae previously cultured at 20 °C, 25 °C, and 30 °C was studied at temperatures ranging from 5 °C to 40 °C.

Effects of temperature and concomitant change in pH on muscle

1990 ◽  
Vol 259 (2) ◽  
pp. R204-R209 ◽  
Author(s):  
E. D. Stevens ◽  
R. E. Godt
Keyword(s):  
Ambient Temperature ◽  
Calcium Sensitivity ◽  
Skinned Fibers ◽  
Concomitant Increase ◽  
Concomitant Change ◽  
Effects Of Temperature ◽  
Contractile Performance

Contractile performance decreases with a decrease in temperature and increases with an increase in pH. In general, a decrease in ambient temperature is associated with an increase of the pH of the intracellular and extracellular fluids of ectotherms. Thus the concomitant increase in pH will to some extent counteract the effect of the decrease in temperature. We review the magnitude of this effect and show that it is modest for force (24%) but is small or negligible for speed or for variables involving time. Experiments with skinned fibers yield similar results to those with intact fibers. We argue that one important effect of the concomitant increase in pH is that it causes an increase in calcium sensitivity and that there may be a considerable metabolic saving associated with releasing less calcium at lower temperatures.

Combined effects of temperature and diet on growth and biochemical composition of the Pacific oyster Crassostrea gigas (Thunberg) spat

2004 ◽  
Vol 35 (12) ◽  
pp. 1131-1140 ◽  
Author(s):  
Cecilia Flores-Vergara ◽  
Beatriz Cordero-Esquivel ◽  
Ana Nallely Ceron-Ortiz ◽  
Bertha O Arredondo-Vega
Keyword(s):  
Crassostrea Gigas ◽  
Biochemical Composition ◽  
Pacific Oyster ◽  
Combined Effects ◽  
The Pacific ◽  
Effects Of Temperature

Temperature acclimation of the caudal photoreceptor response in the crayfish Orconectes rusticus (Girard)

1988 ◽  
Vol 66 (5) ◽  
pp. 1168-1171 ◽  
Author(s):  
Jim H. Belanger
Keyword(s):  
Stimulus Intensity ◽  
Low Temperatures ◽  
Temperature Acclimation ◽  
Thermal Capacity ◽  
Maximum Frequency ◽  
Orconectes Rusticus ◽  
Temperature Dependent ◽  
Caudal Photoreceptor ◽  
Effects Of Temperature ◽  
Nerve Cords

Crayfish (Orconectes rusticus (Girard)) were acclimated for 3 weeks at 5 and 25 °C. The effects of temperature and temperature acclimation on the latency, maximum frequency, and sensitivity to stimulus intensity of the caudal photoreceptor response were examined in isolated abdominal nerve cords. Each of these components was temperature dependent. The maximum frequency of the response showed thermal capacity acclimation but latency did not. Caudal photoreceptor response was insensitive to stimulus intensity at low temperatures but acclimation improved sensitivity.

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