Sperm Sphere in Unionid Mussels (Bivalvia : Unionidae)(Developmental Biology)

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概要

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• We observed spermatozoa of five freshwater Japanese unionid mussel species under a light microscope. Males discharged spermatozoa as spherical masses. Spermatozoa embedded their heads into a spherical, colorless body with their tails extended around the sphere. We termed this spherical mass of sperm as a "sperm sphere". Just after release the sperm spheres rotated rapidly by synchronous movement of the sperm tails. By the next day, the sperm spheres increased in size and some spermatozoa had detached from the sperm spheres. Spermatozoa embedded in the sperm sphere were active at least forty-eight hours after being discharged. Single spermatozoa in a balanced salt solution were also active until forty-eight hr after extraction from the gonads, while they lost their motility within a few minutes in freshwater. Spermatozoa may maintain their motility for a long time in the form of a sperm sphere and the use of sperm spheres may allow the fertilization of eggs discharged into the gill chambers of females far away from the male.

• 社団法人日本動物学会の論文
• 2000-09-20

著者

• Komaru Akira

  Faculty of Bioresources, Mie University

• Ishibashi Ryo

  Faculty of Bioresources, Mie University

• Ishibashi R

  Mie Univ. Mie Jpn

• Ishibashi Ryo

  Faculty Of Bioresources Mie University

• Ishibashi Ryo

  Research Parties For Fine Dispersion Of Nano-particles Technique For Super Metal Technology Hitachi

• Komaru Akira

  Faculty Of Bioresources Mie University

• Kondo Takaki

  Division Of Natural Science Osaka Kyoiku University

関連論文

• A Hypothesis of Ploidy Elevation by Formation of a Female Pronucleus in the Androgenetic Clam Corbicula fluminea in the Tone River Estuary, Japan(Developmental Biology)
• Androgenetic Reproduction in a Freshwater Diploid Clam Corbicula fluminea (Bivalvia: Corbiculidae)(Reproductive Biology)
• Tensile Strength of Austenitic Stainless Steels Processed by Mechanical Milling
• Specific location of sperm mitochondria in mussel Mytilus galloprovincialis zygotes stained by Mito Tracker
• Effects of cryopreservation on sperm structure in Japanese pearl oyster Pinctada fucata martensii
• Motility of spermatozoa obtained from testes of Japanese pearl oyster Pinctada fucata martensii
• Sperm Sphere in Unionid Mussels (Bivalvia : Unionidae)(Developmental Biology)
• Quantitation of the male and female types of mitochondrial DNA in a blue mussel, Mytilus galloprovincialis, using real-time polymerase chain reaction assay
• Inheritance of two M type mitochondrial DNA from sperm and unfertilized eggs to offspring in Mytilus galloprovincialis
• Sperm mitochondrial DNA transmission to both male and female offspring in the blue mussel Mytilus galloprovincialis
• SPERM MITOCHONDRIAL TRANSMISSION TO MALE AND FEMALE IN BLUE MUSSEL, MYTILUS GALLOPROVINCIALIS(Genetics,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
• Habitat preference, food habits and growth of juveniles of Lates angustifrons and Lates mariae (Pisces : Centropomidae) in Lake Tanganyika
• Mitochondrial DNA transmitted from sperm in the blue mussel Mytilus galloprovincialis showing doubly uniparental inheritance of mitochondria, quantified by real-time PCR
• Mitochondrial DNA copy number is maintained during spermatogenesis and in the development of male larvae to sustain the doubly uniparental inheritance of mitochondrial DNA system in the blue mussel Mytilus galloprovincialis
• Different transcriptional ratios of male and female transmitted mitochondrial DNA and tissue-specific expression patterns in the blue mussel, Mytilus galloprovincialis

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