Growth and regeneration patterns in the fiddler crab, uca pugilator
TLDR
The fiddler crab, Uca pugilator, will survive several intermolt cycles in the laboratory, but the cycles are irregular and variations in cycles are due to variations in the length of stage C4.Abstract:
The fiddler crab, Uca pugilator, will survive several intermolt cycles in the laboratory, but the cycles are irregular. Variations in cycles are due to variations in the length of stage C4. The transition from C4 to D in intact crabs does not seem to be due to environmental clues because crabs kept in constant conditions for long periods of time continue to have extremely variable intermolt cycles.Multiple autotomy triggers the onset of proecdysis and a post-autotomy intermolt cycle that is significantly shorter than controls. Multiple autotomy-induced proecdysis is divided into two phases: the "reset event" is independent of the eyestalks, while the "proecdysial program" is normally under their control. Loss of a cheliped is more effective in initiating a reset event than is loss of a single walking leg.Eyestalk removal forces crabs into proecdysis. If crabs are in early proecdysis (stage D0) at eyestalk removal, the proecdysial period is accelerated. Eyestalk removal results in large increases in size a...read more
Citations
More filters
Journal ArticleDOI
The ecological consequences of limb damage and loss in decapod crustaceans: A review and prospectus
Francis Juanes,L. David Smith +1 more
TL;DR: An overview of the incidence of limb damage and loss in decapod crustaceans; review the literature on the ecological consequences of such injury; and suggest areas for future research are suggested.
Journal ArticleDOI
Costs of bearing a sexually selected ornamental weapon in a fiddler crab
TL;DR: Empirical support is provided for a key assumption of sexual selection theory – energetic and endurance-related locomotor costs incurred while bearing this ornamental weapon act in opposition to sexual selection favouring larger claws.
Journal ArticleDOI
Characterization of crab EcR and RXR homologs and expression during limb regeneration and oocyte maturation.
TL;DR: This is the first report of UpEcR and UpRXR transcription during ovarian maturation, implicating the ovary as a potential target for hormonal control in Crustacea.
Journal ArticleDOI
Patterns of serum ecdysteroids during induced and uninduced proecdysis in the fiddler crab, Uca pugilator.
TL;DR: The role of the eyestalk in control of circulating ecdysteroid levels was limited to maintenance of intermolt conditions as mentioned in this paper, and there was no correlation between limb bud growth rates and serum ecdystersoid levels during proecdysis.
References
More filters
Journal Article
Protein Measurement with the Folin Phenol Reagent
TL;DR: Procedures are described for measuring protein in solution or after precipitation with acids or other agents, and for the determination of as little as 0.2 gamma of protein.
Journal ArticleDOI
The structure and metabolism of a crustacean integumentary tissue during a molt cycle
TL;DR: The period of premolt activity during which limb regeneration and gastrolith formation occurs precedes the changes in the integumentary tissues and has, therefore, been called DO.
Journal ArticleDOI
Loss of limbs as a stimulus to ecdysis in brachyura (true crabs)
TL;DR: Loss of 6 to 8 pereiopods or chelipeds triggers precocious molts in a number of marine crabs including the green crab, Carcinus maenas, the blue crab, Callinectes sapidus, and the fiddler crabs, Uca pugnax and U. pugilator, but not in the spider crab, Libinia emarginata.
Journal ArticleDOI
Breakdown and reformation of somatic muscle during the molt cycle of the land crab, Gecarcinus lateralis.
TL;DR: During the premolt period (approximately 50 days in large specimens of this animal) the quantity of muscle per chela decreases to approximately 60% the amount found in intermolt animals; during this time the fraction of protein per unit of wet weight of muscle remains constant.
Journal ArticleDOI
Environmental regulation of growth in the decapod crustacean gecarcinus lateralis.
TL;DR: By means of this adaptive mechanism, a crab's safety at ecdysis can be virtually assured.
Related Papers (5)
Loss of limbs as a stimulus to ecdysis in brachyura (true crabs)
The ecological consequences of limb damage and loss in decapod crustaceans: A review and prospectus
Francis Juanes,L. David Smith +1 more