SCALING OF CALCIUM, INORGANIC CONTENTS, AND ORGANIC CONTENTS TO BODY MASS DURING THE MOLTING CYCLE OF THE FRESH-WATER CRAYFISH PROCAMBARUS CLARKII (GIRARD)

1995 ◽  
Vol 15 (3) ◽  
pp. 409-417
Keyword(s):  
Fresh Water ◽  
Body Mass ◽  
Procambarus Clarkii ◽  
Molting Cycle

Elongation factor 1Bγ (eEF1Bγ) expression during the molting cycle and cold acclimation in the crayfish Procambarus clarkii

2008 ◽  
Vol 150 (2) ◽  
pp. 170-176 ◽  
Author(s):  
Christopher M. Gillen ◽  
Yongping Gao ◽  
Margaret M. Niehaus-Sauter ◽  
Meredith R. Wylde ◽  
Michele G. Wheatly
Keyword(s):  
Cold Acclimation ◽  
Procambarus Clarkii ◽  
Elongation Factor ◽  
Molting Cycle

scholarly journals What is molt-inhibiting hormone? The role of an ecdysteroidogenesis inhibitor in the crustacean molting cycle

1989 ◽  
Vol 86 (17) ◽  
pp. 6826-6829 ◽  
Author(s):  
Yoko Naya ◽  
Mayumi Ohnishi ◽  
Midori Ikeda ◽  
Wataru Miki ◽  
Koji Nakanishi
Keyword(s):  
Procambarus Clarkii ◽  
Active Form ◽  
Xanthurenic Acid ◽  
Sinus Gland ◽  
Inhibitory Effects ◽  
Molting Cycle ◽  
Biosynthesis Inhibitors

The in vivo molt-inhibitory effects of the ecdysone biosynthesis inhibitors 3-hydroxy-L-kynurenine and xanthurenic acid were investigated. These ecdysone biosynthesis inhibitors, isolated from the eyestalks of blue crabs (Callinectes sapidus), were injected into eyestalk-ablated crayfish (Procambarus clarkii). The active factor was found to be species-nonspecific within crabs and crayfish. The seasonal profiles of the xanthurenic acid and ecdysone titers exhibited a staggered relationship. Moreover, the activity of a 3-hydroxy-L-kynurenine aminotransferase varied during the molting cycle. The data suggested that 3-hydroxy-L-kynurenine, which is secreted from the X-organ-sinus gland complex of crustaceans, is released into the hemolymph, and after accumulating at the surface of the Y-organ, is converted into the active form, xanthurenic acid. Xanthurenic acid was found to profoundly repress ecdysteroidogenesis in vitro.

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