Respiratory metabolism of the fiddler crab uca pugilator from two different latitudinal populations
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The same experiments made after the animals have been left at a common temperature of 20° C., show that a stay of seven or eight weeks under similar conditions does not abolish the metabolic differences observed between populations.Abstract:
Determinations of the respiratory rates of Uca pugilator from two different latitudes (Woods Hole and Florida) have been made at 1.4° and 15° C.1. Woods Hole Uca pugilator show a higher rate of metabolism at low temperature than do specimens of the more southerly populations.2. Uca pugilator from the higher latitude are less sensitive to temperature changes than Uca pugilator of same weight from a southern latitude. This has been shown by a lower Q10 for the Woods Hole population.3. Woods Hole Uca are more resistant to low temperature than Florida Uca.4. The same experiments made after the animals have been left at a common temperature of 20° C., show that a stay of seven or eight weeks under similar conditions does not abolish the metabolic differences observed between populations.5. These physiological characteristics and some morphological ones might be used to distinguish two subspecies of Uca pugilator.read more
Citations
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Studies on the physiological variation between tropical and temperate zone fiddler crabs of the genus uca. ii. oxygen consumption of whole organisms
TL;DR: The rate of oxygen consumption of seven species of Uca from the tropical and temperate zones was determined over a graded temperature series and intra- and interspecific comparisons of metabolism-size relationships were made on data obtained at various temperatures.
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THE WATER AND HEAT RELATIONSHIPS OF FIDDLER CRABS (Uca spp.)
TL;DR: No short-term acclimatization in crabs was found, although it occurs in Oniscus asellus, and species which transpire faster generally have lower body temperatures.
Some consequences of sexual dimorphism : feeding in male and female fiddler crabs,
TL;DR: There were no differences in the respiratory rates of male and female Uca pugnax of comparable sizes, yet the enlarged claw of the fiddler crabs cannot be used for feeding, and there are minimal differences in food demands and digestive efficiencies between the sexes.
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Some consequences of sexual dimorphism: feeding in male and female fiddler crabs, uca pugnax (smith)
TL;DR: In this paper, it was shown that there are minimal differences in food demands and digestive efficiencies between the sexes, yet the enlarged claw of the fiddler crabs cannot be used for feeding.
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Studies on the Physiological Variation Between Tropical and Temperate Zone Fiddler Crabs of the Genus UCA I. Thermal Death Limits
TL;DR: The present paper is undertaken both to determine the upper and lower thermal death limits of various species of tropical and temperate zone fiddler crabs and to study the influence of acclimation to low temperature on shifting the thermal death points.
References
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Compensation for temperature in the metabolism and activity of poikilotherms
TL;DR: Many poikilothermal animals exhibit in their metabolism or activity some degree of independence of their temperature, but in the general case this is regarded as reflecting a compensation rather than a fundamental insensitivity of metabolism or the rate functions measured.
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Climatic Adaptation in Arctic and Tropical Poikilotherms
TL;DR: The results indicate that the color-differentiating capacity appears to be associated with a high-illumination receptive mechanism (photopic) in a manner paralleling that in the vertebrate eye.
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Physiological variation in animals
TL;DR: Physiological variation is useful in describing interspecific relations, intraspecific variation and the limits of ecological range, and is usually accompanied by detectable morphological variation which may or may not be adaptive.
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Q10 as a Function of Size and Habitat Temperature in Poikilotherms
TL;DR: Data has been assembled from various sources, which show that Q10 of various measures of activity commonly increases with increasing size within the physiologically normal ranges of temperature.