Moult-related Fluctuation in Ecdysteroid Titre and Spermatogenesis in the Crab, Metopograpsus messor (Brachyura: Decapoda)

蟹類Metopograpsus messor（Brachyura: Decapoda）之蛻皮類固醇激素濃度與精子形成相互關係

Arundhathi Shyla Suganthi ； Gopinathan Anilkumar

《Zoological Studies》 38卷3期 (1999/07) Pp. 314-321

摘要

本研究探討雄性平分大額蟹（Metopograpsus messor）生長與生殖之相互關係。不同蛻皮階段是以上肢顎足的剛毛發育而區分。在蛻皮間期，M. messor的精巢，呈現各階段之精子形成（例如精組細胞、精母細胞、精子細胞及精子），且其比例亦相近。但在蛻皮前期開始（蛻皮類固醇激素濃度上升），引發精母細胞增殖，及精子成熟遲緩。雖然本研究結果指出在蛻皮間期，蛻皮類固醇激素分泌甚低，但精子形成仍然進行。

關鍵字

甲殼類 ； 上肢 ； 生長 ； 生殖 ； 精子

並列摘要

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 normally.

並列關鍵字

Crustacea ； Epipodite ； Growth ； Reproduction ； Spermatozoa