Accumulation of calcium in the antennal gland during the molting cycle of the freshwater crayfish Procambarus clarkii

James V. Rogers, Michele G. Wheatly

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Calcium (Ca+2) was histochemically localized in antennal glands during the molting cycle of the crayfish Procambarus clarkii. In tissues involved in electrolyte reabsorption, alizarin red S formed precipitates with Ca+2 (4-30 μm in diameter). In the coelomosac, the number of Ca+2-alizarin precipitates did not vary significantly during the molting cycle. In labyrinth and nephridial canal tissues, Ca+2 precipitates were significantly more abundant during postmolt than during intermolt, with a maximum at 4 days postmolt; by 14 days postmolt, Ca+2 precipitation had decreased in the labyrinth and nephridial canal, although the values remained significantly greater than intermolt levels. Distal nephridial canal cells treated with potassium oxalate contained mitochondria with electron-dense precipitates (30-85 nm in diameter). These deposits reached a maximum at 4 days postmolt, but remained significantly above intermolt levels by 14 days postmolt. These findings suggest that Ca+2 accumulates in reabsorptive tissues during postmolt and that the mitochondria of distal nephridial canal cells may also serve to maintain intracellular and extracellular Ca+2 homeostasis. Additional key words: nephridial canal, labyrinth, alizarin red S, K+-oxalate, histochemistry.

Original languageEnglish (US)
Pages (from-to)248-254
Number of pages7
JournalInvertebrate Biology
Issue number3
StatePublished - Jan 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Animal Science and Zoology


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