Vol. 38 No. 3, 1999
Moult-related Fluctuation in Ecdysteroid Titre and Spermatogenesis in the Crab, Metopograpsus messor (Brachyura: Decapoda)
Arundhathi Shyla Suganthi and Gopinathan Anilkumar*
Post Graduate Department of Zoology and Research Centre, Sree Narayana College, Cannanore 670007, Kerala, India
Arundhathi Shyla Suganthi and Gopinathan Anilkumar (1999) The present study examines the interrelation between growth and reproduction in males of the brachyuran crab, Metopograpsus messor.
Moult stages were characterized through observing the setal development
of the maxilliped epipodite. During intermoult, the testis of M. messor shows
the presence of various spermatogenic stages (such as spermatogonia,
spermatocytes, spermatids, and spermatozoa) in almost equal
proportions. However, the onset of premoult (coupled with a significant
rise in ecdysteroid titre) results in a significant increase in
spermatogonial proliferation and refractoriness in sperm maturation.
Our results also reveal that at least a low level of ecdysteroid is
present during the intermoult stage, when spermatogenesis occurs
Key words: Crustacea, Epipodite, Growth, Reproduction, Spermatozoa.