Document Detail

Ultrastructure of the sperm of blue sprat, Spratelloides gracilis; Teleostei, Clupeiformes, Clupeidae.
MedLine Citation:
PMID:  17005223     Owner:  NLM     Status:  MEDLINE    
The general sperm structure of the investigated clupeoids possess an oliviform head with a distinct deep nuclear fossa, a midpiece with one mitochondrion and a posterior flagellum. They are characterized by two apomorphies: an annular or C-shaped mitochondrion and ITDs (intratubular differentiation) in the A tubules of the axonemal doublets. The fine structure of the spermatozoa of blue sprat, Spratelloides gracilis, was investigated to see if resulting data conformed to the current hypotheses of the taxonomy of the Clupeidae. The mature sperm is characterized by the following features: (1) the nucleus is oliviform; its prominent deep nuclear fossa encloses the initial portion of flagellum, (2) a proximal centriole has not been identified, (3) a single spherical mitochondrion is located laterally in relation to the flagellum and (4) no cytoplasmic canal is present. Our blue sprat-spermatozoan morphology data suggest that the blue sprat has Clupeomorpha affinities, while indicating no close affinity with Elopomorpha. Clupeoid sperm exhibit morphological variations with the nucleus and mitochondrion being particularly variable. This study provides useful systematic characters to the existing knowledge of comparative spermatology and may provide additional clue to Euteleost phylogeny.
J-C Gwo; C-Y Lin; W-L Yang; Y-C Chou
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-09-26
Journal Detail:
Title:  Tissue & cell     Volume:  38     ISSN:  0040-8166     ISO Abbreviation:  Tissue Cell     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-24     Completed Date:  2006-12-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214745     Medline TA:  Tissue Cell     Country:  Scotland    
Other Details:
Languages:  eng     Pagination:  285-91     Citation Subset:  IM    
Department of Aquaculture, Taiwan National Ocean University, #2, Pei-Nin Road, Keelung 20224, Taiwan.
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MeSH Terms
Cell Nucleus / physiology,  ultrastructure
Cell Shape / physiology
Cytoplasm / physiology,  ultrastructure
Fishes / anatomy & histology*,  physiology
Flagella / physiology,  ultrastructure
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Mitochondria / physiology,  ultrastructure
Reproduction / physiology
Species Specificity
Spermatozoa / physiology,  ultrastructure*
Testis / physiology,  ultrastructure*

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