Energetics of Fish Spermatozoa

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F20%3A43901824" target="_blank" >RIV/60076658:12520/20:43901824 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Energetics of Fish Spermatozoa

Original language description

Fish spermatozoa need to perceive a signal from the external milieu so as to activate their motility. The osmolarity and/or ionic composition of the marine or freshwater surrounding fish control the activation of fish sperm flagella at spawning. Flagella motility is energy dependent and the amount of energy stored in the spermatozoon prior to its activation is a main factor that will sustain their vigorous motility but for only a short period (one to several minutes) in fish until partial exhaustion of this energy stops motility. Storage of energy mostly results from mitochondrial respiration that generates ATP. Energy metabolism also involves other compounds such as creatine–phosphate that contribute to the maintenance of the intracellular energy level in connection with ATP. In few species, especially internally fertilizing ones, part of the energy comes from glycolysis. For efficient motility of swimming fish spermatozoa, the ATP usage (chemical hydrolysis) is mainly balanced by the physical power developed by the flagellum against viscosity forces: this balance sheet is also discussed in this chapter. The rest of ATP consumption is needed by fish spermatozoa for “housekeeping” tasks such as maintaining the ionic balance across the cell membrane as example. The cryopreservation process induces deleterious perturbations at several levels of the energy metabolic network such as damage to mitochondria, leaking of cell membrane, and damage to the flagella motility apparatus that altogether lead to a serious decrease in the percentage of motile cells and consequently the fertilizing ability.

Czech name

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Czech description

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Type

C - Chapter in a specialist book

CEP classification

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OECD FORD branch

10608 - Biochemistry and molecular biology

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Book/collection name

Cryopreservation of Fish Gametes

ISBN

978-981-15-4024-0

Number of pages of the result

48

Pages from-to

69-116

Number of pages of the book

352

Publisher name

Springer Nature Singapore Pte Ltd.

Place of publication

Singapore

UT code for WoS chapter

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