Gametogenesis of one year-old induced triploid mussels, Mytilus galloprovincialis, was examined histologically and compared to sibling diploid mussels. Histological analysis revealed that triploid mussels developed a number of primary spermatocytes that were arrested at prophase I. Late in the reproductive season, triploid mussels produced an extremely small number of spermatozoa (9/10000 μm2 gonadal section) compared to diploid mussels (1072/10000 μm2 gonadal section). All triploid mussels were identified as males, whereas the sex ratio of diploid mussels was almost equal (1.12:1.0, male:female), indicating that sex determination for this species may follow a Z:W model. Sertoli cells in triploid mussels were prominent, had an enlarged cytoplasm, and were easily seen using light microscopy. In comparison, Sertoli cells in diploids were thin and could only be seen by electron microscopy. Sertoli cell hypertrophy in triploid mussels probably reflects their role in eliminating abnormal and degenerating germ cells.
Member of
Contributors
Publisher
Zoological Society of Japan
Date Issued
1996
Note
Language
Type
Genre
Form
Extent
11 p.
Subject (Topical)
Identifier
FA00007267
Additional Information
Gametogenesis of one year-old induced triploid mussels, Mytilus galloprovincialis, was examined histologically and compared to sibling diploid mussels. Histological analysis revealed that triploid mussels developed a number of primary spermatocytes that were arrested at prophase I. Late in the reproductive season, triploid mussels produced an extremely small number of spermatozoa (9/10000 μm2 gonadal section) compared to diploid mussels (1072/10000 μm2 gonadal section). All triploid mussels were identified as males, whereas the sex ratio of diploid mussels was almost equal (1.12:1.0, male:female), indicating that sex determination for this species may follow a Z:W model. Sertoli cells in triploid mussels were prominent, had an enlarged cytoplasm, and were easily seen using light microscopy. In comparison, Sertoli cells in diploids were thin and could only be seen by electron microscopy. Sertoli cell hypertrophy in triploid mussels probably reflects their role in eliminating abnormal and degenerating germ cells.
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution 1155
This manuscript is an author version with the final
publication available and may be cited as: Kiyomoto, M., Komaru, A., Scarpa, J., Wada, K. T., Danton,
E., & Awaji, M. (1996). Abnormal gametogenesis, male dominant sex ratio, and sertoli cell morphology
in induced tripoid mussels, Mytilus galloprovincialis. Zoological Science, 13(3), 393-402.
publication available and may be cited as: Kiyomoto, M., Komaru, A., Scarpa, J., Wada, K. T., Danton,
E., & Awaji, M. (1996). Abnormal gametogenesis, male dominant sex ratio, and sertoli cell morphology
in induced tripoid mussels, Mytilus galloprovincialis. Zoological Science, 13(3), 393-402.
Date Backup
1996
Date Text
1996
Date Issued (EDTF)
1996
Extension
FAU
IID
FA00007267
Person Preferred Name
Kiyomoto, M.
Physical Description
11 p.
Title Plain
Abnormal gametogenesis, male dominant sex ratio, and sertoli cell morphologyin induced tripoid mussels, Mytilus galloprovincialis
Origin Information
1996
Zoological Society of Japan
Tokyo, Japan
Place
Tokyo, Japan
Title
Abnormal gametogenesis, male dominant sex ratio, and sertoli cell morphologyin induced tripoid mussels, Mytilus galloprovincialis
Other Title Info
Abnormal gametogenesis, male dominant sex ratio, and sertoli cell morphologyin induced tripoid mussels, Mytilus galloprovincialis