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Acta Biologica Hungarica

, Volume 56, Issue 1–2, pp 169–172 | Cite as

The Testis Histology of Artificially Maturated European Eel (Anguilla anguilla L.) at the end of Sexual Maturation, and Spermatozoa Ultrastructure in Freshwater Rearing

Short Communication
  • T. MüllerEmail author
  • F. Baska
  • C. Niklesz
  • P. Horn
  • B. Váradi
  • M. Bercsényi
Article

Abstract

The artificial induction of sexual maturation of European eel males was carried out by using weekly hCG administrations. Histological pictures showed that the testis tissues developed and regressed naturally and no pathological changes took place under the conditions of artificial rearing in freshwater. According to light and electron microscopic investigations the morphology and motility of the spermatozoa of males kept in freshwater proved to be similar to those in seawater. The authors suppose that freshwater rearing of males is not a barrier factor in the artificial propagation of European eels.

Keywords

Sexual maturation European eel spermatozoa 

Abbreviations

dc

distal centriole

dS

degenerated spermatozoa and spermatids

Ct

connective tissue

E

erythrocytes

f

flagellum

L

lumina

m

mitochondrium

n

nucleus

pc

proximal centriole

r

rootlet

S

spermatozoa

Sg

spermatogonium

Sc1

primary spermatocyte

Sc2

secondary spermatocyte

St

spermatid

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References

  1. 1.
    Boëtius, I., Boëtius, J. (1967) Studies in the European Eel, Anguilla anguilla (L.). Experimental induction of the male sexual cycle, its relation to temperature and other factors. Medd. Dan. Fisk. Havunders. 4, 339–405.Google Scholar
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    Colombo, G., Grandi, G., Romeo, A., Giovanni, G., Pelizzola, D., Catozzi, L., Piffanelli, A. (1987) Testis cytological structure, plasma sex steroids, and gonad cytosol free steroid receptors of heterologous gonadotropin (hCG)-stimulated silver eel, Anguilla anguilla L. Gen. Comp. Endocrin. 65, 167–178.CrossRefGoogle Scholar
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    Dollerup, J., Graver, C. M. (1985) Repeated induction of testicular maturation and spermiation, alternating with periods of feeding and growth in silver eels, Anguilla anguilla (L.). Dana 4, 19–39.Google Scholar
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    Okamura, A., Zhang, H., Yamada, Y., Tanaka, S., Horie, N., Mikawa, N., Utoh, T., Oka, H. P. (2000) Re-examination of the spermatozoal ultrastructure of eels: observations of the external morphology of spermatozoa in three species. J. Fish Biol. 57, 161–169.Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest 2005

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • T. Müller
    • 1
    • 2
    Email author
  • F. Baska
    • 3
  • C. Niklesz
    • 3
  • P. Horn
    • 2
  • B. Váradi
    • 1
  • M. Bercsényi
    • 1
  1. 1.Georgikon Faculty of AgricultureUniversity of VeszprémKeszthelyHungary
  2. 2.Faculty of Animal ScienceUniversity of KaposvárKaposvárHungary
  3. 3.Faculty of Veterinary ScienceSzent István UniversityBudapestHungary

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