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- W2367484045 abstract "By use of electron microscopy and cytochemical methods, the morphology and structure of sperm from the shrimp Penaeus penicillatus are described in this paper. The results by Scanning electron microscopy show that the sperm from theshrimp P. penicillatus is composed of ball-like spherical body and nail-like spike. The sperm is about 7u in length. The Surface of spike and spherical body is smooth, and there are finger-like projection in bottom face of spherical body. It is shown that the results by transmission and freeze-etching electron microscopy show that the spike of shrimp is not a flagellum structure of tail and it is a location of acrosome (it is positive reaction for acid phosphatase). The acrosome is composed of acrosome cone and acrosome cap. The acrosome cone protrudes outward and forms a spike of sperm. The cytoplasm of mature sperm is degenerated extremely. There art 1-2 mitochon-dria in cytoplasmic edge near the acrosome. the center of spherical body has a global shape and shows positive reaction for Feulgen staining. It is a nuclear area. The nuclear area is loose in structure, and low for electron density. There are many flocculent materials in it. the nuclear envelope is discontinuous and it is formed from membranes which are long or short in length and irregular in order. The results from the paper note that the spike of the sperm from shrimp is not a flagellate and it is a location of acrosome. The sperm from the shrimp belongs to aflagellar and non motile type." @default.
- W2367484045 created "2016-06-24" @default.
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- W2367484045 date "1993-01-01" @default.
- W2367484045 modified "2023-09-25" @default.
- W2367484045 title "SPERMATOGENESIS IN THE SHRIMP PENAEUS PENICILLATUS: ——I. THE MORPHOLOGY AND STRUCTURE OF THE SPERM" @default.
- W2367484045 hasPublicationYear "1993" @default.
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