| Abstract: | Adult zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussels were induced to release large quantities of live spermatozoa by the administration of 5-hydroxytryptamine (serotonin). Sperm were photographed alive using phase-contrast microscopy and were fixed subsequently with glutaraldehyde followed by osmium tetroxide for eventual examination by transmission or scanning electron microscopy. The sperm of both genera are of the ect-aquasperm type. Their overall dimensions and shape allow for easy discrimination at the light and scanning electron microscopy level. Transmission electron microscopy of the cells reveals a barrel-shaped nucleus in zebra mussel sperm and an elongated nucleus in quagga mussel sperm. In both species, an acrosome is cradled in a nuclear fossa. The ultrastructure of the acrosome and axial body, however, is distinctive for each species. The structures of the midpiece are shown, including a unique mitochondrial ‘skirt‘ that includes densely packed parallel cristae and extends in a narrow sheet from the mitochondria. |
| Genre: | Article |
| ProdID: | 1000690 |
| Citation Author: | Walker, G.K.; Black, M.G.; Edwards, C.A. |
| Citation Contributing Office: | Great Lakes Science Center |
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| Citation End Page: | 815 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Zoology |
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| Citation Number Of Pages: | 6 |
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| Citation Phsyical Description: | p. 809-815 |
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| Citation Search Results Text: | Comparative morphology of zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussel sperm: Light and electron microscopy; 1996; Article; Journal; Canadian Journal of Zoology; Walker, G.K.; Black, M.G.; Edwards, C.A. |
| Citation Start Page: | 809 |
| Citation Volume: | 74 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Comparative morphology of zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussel sperm: Light and electron microscopy; 1996; Article; Journal; Canadian Journal of Zoology; Walker, G.K.; Black, M.G.; Edwards, C.A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
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