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

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Title Spermatogenesis and spermatozoal ultrastructure
in Metapenaeus monoceros (Fabricius, 1798)
Not Available
 
Creator Sanil,N K
Manisseri,Mary K
Abraham,Joice
 
Subject Spermatogenesis
spermatozoal ultrastructure
Metapenaeus monoceros
 
Description Not Available
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.
Not Available
 
Date 2021-09-15T08:30:20Z
2021-09-15T08:30:20Z
2007
 
Type Article
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62183
 
Language English
 
Relation Not Available
 
Publisher CMFRI; Kochi