Sperm and Spermatozoa Characteristics in the Siberian Sturgeon

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F18%3A43897602" target="_blank" >RIV/60076658:12520/18:43897602 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Sperm and Spermatozoa Characteristics in the Siberian Sturgeon

Popis výsledku v původním jazyce

Sperm and spermatozoa in Siberian sturgeon are very interesting and specific from several points of view. Siberian sturgeon usually produces high volume of semen with relatively low sperm and protein concentration, which is partially explained by the atypical testicular morphology where spermatozoa are mixed with urine during passage through the kidneys to the Wolffian ducts. Sodium and chloride ions contribute most to the osmolality of the seminal fluid. Potassium ions are critical for immobilization of spermatozoa, while its antagonist is calcium ion, which triggers spermatozoa motility. The motility period is relatively long (2–3 min) with flagellum beat frequency about 50 Hz. The main characteristics of sturgeon spermatozoa are an elongated head with an acrosome containing acrosomal proteins. The flagellum is equipped with a fin for more efficient movement. During penetration into the egg micropyle, the acrosome undergoes acrosomal reactions, which include formation of fertilization filament and opening of posterolateral projections. The fertilization filament activates the egg and causes the formation of a perivitelline space, while the posterolateral projections serve as an anchor against release from the micropyle. The acrosomal reaction has been recognized to be important for fertilization and development.

Název v anglickém jazyce

Sperm and Spermatozoa Characteristics in the Siberian Sturgeon

Popis výsledku anglicky

Sperm and spermatozoa in Siberian sturgeon are very interesting and specific from several points of view. Siberian sturgeon usually produces high volume of semen with relatively low sperm and protein concentration, which is partially explained by the atypical testicular morphology where spermatozoa are mixed with urine during passage through the kidneys to the Wolffian ducts. Sodium and chloride ions contribute most to the osmolality of the seminal fluid. Potassium ions are critical for immobilization of spermatozoa, while its antagonist is calcium ion, which triggers spermatozoa motility. The motility period is relatively long (2–3 min) with flagellum beat frequency about 50 Hz. The main characteristics of sturgeon spermatozoa are an elongated head with an acrosome containing acrosomal proteins. The flagellum is equipped with a fin for more efficient movement. During penetration into the egg micropyle, the acrosome undergoes acrosomal reactions, which include formation of fertilization filament and opening of posterolateral projections. The fertilization filament activates the egg and causes the formation of a perivitelline space, while the posterolateral projections serve as an anchor against release from the micropyle. The acrosomal reaction has been recognized to be important for fertilization and development.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

10604 - Reproductive biology (medical aspects to be 3)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

The Siberian Sturgeon (Acipenser baerii, Brandt, 1869) Volume 1 - Biology

ISBN

978-3-319-61662-9

Počet stran výsledku

20

Strana od-do

307-326

Počet stran knihy

496

Název nakladatele

Springer, Springer International Publishing AG, part of Springer Nature 2018

Místo vydání

Cham

Kód UT WoS kapitoly

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