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Latin american journal of aquatic research

On-line version ISSN 0718-560X

Abstract

GOLDSTEIN, Merari  and  DUPRE, Enrique. Modifícation of the spermatic structure of the crab Cancer setosus (Molina, 1782) (Decapoda: Brachyura) during induced acrosomal reaction. Lat. Am. J. Aquat. Res. [online]. 2011, vol.39, n.1, pp.172-178. ISSN 0718-560X.

The spermatozoon of Cancer setosus consists of a spherical acrosome and a cup-shaped nucleus surrounding the lowest zone of the acrosome and widening at the equatorial área of the acrosome. The spermatozoa extracted from the seminal receptacle of the female and placed in sea water for 15 min underwent the acrosome reaction, which started with the elongation of the acrosomal vesicle followed by the extrusión of its contents. Subsequently, the perforatorium projected forward ≈ 1µm beyond the apical end of the extruded acrosomal vesicle contents, forming an acrosomal filament with a trident-shaped structure on the apical end.

Keywords : sperm structure; acrosome; spermatozoa; spermatheca; seminal receptacle; Cancer setosus; Chile.

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