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Registro Completo
Biblioteca(s):  Embrapa Caprinos e Ovinos.
Data corrente:  01/08/1992
Data da última atualização:  13/11/2023
Autoria:  HANCOCK, J. L.
Título:  The morphology of boar spermatozoa.
Ano de publicação:  1956
Fonte/Imprenta:  Journal Royal Michigan Society, v. 76, n. 3, p. 84-97, Sep. 1956.
DOI:  https://doi.org/10.1111/j.1365-2818.1956.tb00443.x
Idioma:  Inglês
Conteúdo:  Abstract: The morphological features of boar spermatozoa in freshly ejaculated semen and in semen exposed to various experimental treatments have been studied in stained smears and with the phase-contrast microscope and the electron-microscope. The spermatozoon of the boar closely resembles that of other domestic ungulates. The head is approximately 8.5? long; it is twice as long as it is wide. The mid-piece is approximately 10? long and the main tail-piece is 30? long. The head is covered anteriorly by a cap-like structure?the acrosome. Evidence is presented to show that the acrosome has two components: the outer acrosome is the larger, the smaller inner acrosome is a crescentic structure. The segment-shaped area of overlap between the two parts of the acrosome forms the equatorial segment which is a feature of living boar spermatozoa. The surface of the head behind the acrosome impregnates with silver; this argentophil area is the post-nuclear cap. Three neck granules can be distinguished at the posterior border of the head and these are apparently connected to three bundles of neck fibres which the head receives from the mid-piece. The structure of the spermatozoon is altered by post-mortem changes; the most prominent changes occur in the acrosome. Evidence is presented that the post-nuclear cap is absent from dead spermatozoa. The development of the boar acrosome has been studied in sections stained by the PAS method and in unfixed tissues with the phase-contrast microsc... Mostrar Tudo
Thesagro:  Espermatozóide; Reprodução; Suíno.
Thesaurus Nal:  Reproduction; Spermatozoa; Swine.
Categoria do assunto:  L Ciência Animal e Produtos de Origem Animal
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Caprinos e Ovinos (CNPC)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPC8092 - 1ADDAP - DD
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