...Marcos Sterkel; Mariano Volonté; Maximiliano G. Albornoz; Juan Pedro Wulff; Mariana del Huerto Sánchez; Paula María Terán; María Teresa Ajmat; Sheila Ons ABSTRACT In ecdysozoan animals, moulting entails the production of a new exoskeleton and shedding of the old one during ecdysis. It is induced...

... of cutaneous ion transporters, to compensate for the increased skin ‘leakiness’ that occurs during sloughing. Amphibian Homeostasis Moulting qPCR Sodium transport Western blotting The skin, the largest vertebrate organ, has evolved into a complex, pluri-stratified, multi-membrane system...

... of the extensor muscles themselves. The energy is then suddenly released from these stores to power the rapid, propulsive movements of the hind legs. The reliance on the mechanical storage of energy is likely to impact on jumping because growth occurs by a series of five moults, at each of which the exoskeleton...

...Michiya Kamio; Manfred Schmidt; Markus W. Germann; Julia Kubanek; Charles D. Derby Female blue crabs ( Callinectes sapidus ) in their pubertal moult stage release unidentified sex pheromone molecules in their urine, causing males to respond with courtship behaviours including a display called...

.... Purification of Ha-CalpM showed that the 62 kDa and 68 kDa isoforms co-eluted from gel filtration and ion exchange columns at positions consistent with those of previously described Ca 2+ -dependent proteinase III(CDP III; 59 kDa). Ha-CalpM mRNA and protein did not change during the moulting cycle. The muscle...

... motor outputs in two distinct and fundamental behaviours: feeding and moulting. The FG motor pattern was found to be complex, and strongly dependent on the locust's physiological and behavioural state. Rhythmic activity of the foregut was dependent on the amount of food present in the crop; animals...

... last minutes before ecdysis that burst patterning became irregular and the otherwise strictly alternating motor sequence broke down. After the moult, coordinated rhythmicity was re-established within 10 min. Concomitant with these final changes in motor network expression at ecdysis was a drastic...

...Douglas S. Neufeld; James N. Cameron ABSTRACT Blue crabs ( Callinectes sapidus Rathbun) acclimated to a salinity of 2 ‰ approximately doubled in wet mass (excluding carapace) during the period from 10 h before moult to 2 h after moult. Both in blue crabs acclimated to 2 ‰ salinity and in crabs...

..., but the concentration of free calcium in the blood decreased to 5.6 and 4.6 mmol l −1 , respectively, at external concentrations of calcium of 0.25 and 0.10 mmol l −1 . Crabs transferred to water with 0.10 mmol l −1 calcium for the first 2 days after moult accumulated only 2.5 g calcium kg −1 wet mass, about one...

...Douglas S. Neufeld; James N. Cameron ABSTRACT The regulation of calcium in most crustaceans is especially challenging owing to the highly mineralized cuticle that must be recalcified after each moult, a process that often occurs in environments with low concentrations of calcium. The gill...

...Douglas S. Neufeld; James N. Cameron ABSTRACT After moulting, blue crabs ( Callinectes sapidus ) acclimated to a salinity of 2 ‰ were able to calcify as rapidly and accumulate as much calcium as crabs in sea water. Immediately after moult, the total masses of calcium, magnesium and strontium...

... trapped within this lung structure substantially reduces water penetration, despite surface tension (capillary) processes. This same lung design also facilitates the shedding of the lung cuticle at each moult. * Present address: Department of Physiology, Medical School, University of Witwatersrand...

...Michele G. Wheatly; Lori A. Ignaszewski ABSTRACT Whole-animal net electrolyte fluxes (Ca 2+ , apparent H + , titratable acidic equivalents, ammonia, Na + , Cl − , K + , Mg 2+ , phosphate and sulphate) and respiratory gas exchange were monitored throughout the moulting cycle in juvenile freshwater...

...James N. Cameron ABSTRACT In the days immediately after moulting, manipulations of external pH, [HCO 3 − ], and [Ca 2+ ] were used to determine the nature of the rapid net Ca 2+ influx and attendant apparent net H + efflux in the blue crab ( Callinectes sapidus Rathbun). Both fluxes were strongly...

...James N. Cameron; Chrism M. Wood ABSTRACT Just after moulting the blue crab, Callinectes sapidus , is soft and defenceless, but in the following days, a hard calcareous shell is formed for support and protection. The carapace of intermoult (hard) crabs constitutes 27% of the wet weight and 53...

... © 1984 by Company of Biologists 1984 Holthuisana calcium storage moulting Marine decapods lose a large proportion of their total body calcium when they moult ( Passano, 1960 ). Most of the calcium retained (10-20% of the total at the preceding intermoult stage) is derived from...