Abstract
The dynamics of the mandibular organ (MO) in the edible fresh water field crab Oziotelphusa senex senex was studied as a function of sex, weight, reproduction, molting and eyestalk ablation (ESX). The weight of the mandibular organ exhibited a positive correlation with the body weight. In general, male crabs possess larger mandibular organs when compared to female crabs. The weight of the mandibular organ increased with ovarian index, molting and as the crab progressed towards reproduction. Bilateral eyestalk ablation resulted in a significant increase in mandibular organ weight. The methyl farnesoate (MF) content of the mandibular organ increased with increase in organ weight. The results presented strongly support a potential role of the mandibular organ in regulating both molting and reproduction.
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