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Spermatogenesis and spermatozoal ultrastructure in Metapenaeus monoceros (Fabricius, 1798)

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Relation http://eprints.cmfri.org.in/5848/
 
Title Spermatogenesis and spermatozoal ultrastructure
in Metapenaeus monoceros (Fabricius, 1798)
 
Creator Abraham, Joice
Manisseri, Mary K
Sanil, N K
 
Subject Fish biology
 
Description Spermatogenesis in the ‘speckled shrimp’ Metapenaeus monoceros (Fabricius,
1798) was studied employing histological and transmission electron microscopic
techniques. Male specimens of the species were classified into three maturity
stages based on gross morphology. Spermatozoa of M. monoceros was observed
to be unistellate with a spherical main body and a spike. The main body was
made up of a central nuclear region, a peripheral cytoplasmic band and an
acrosomal cap, which overlaid the nuclear region anteriorly. From the acrosomal
cap projected an extended spike towards the anterior of the spermatozoa. The
spike and the acrosomal cap together were called the acrosomal vesicle. The
average length of the spermatozoa was 6µ m. The main body had a mean diameter
of 3.4µ m with the spike measuring 2.6µ m in length.
 
Publisher CMFRI; Kochi
 
Date 2007
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/5848/1/a1.pdf
Abraham, Joice and Manisseri, Mary K and Sanil, N K (2007) Spermatogenesis and spermatozoal ultrastructure in Metapenaeus monoceros (Fabricius, 1798). Indian Journal of Fisheries, 54 (1). pp. 1-9.