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Testis Development, Sperm Quality Evaluation and Cryopreservation in the European Eel

  • Chapter
Spawning Migration of the European Eel

Part of the book series: Fish & Fisheries Series ((FIFI,volume 30))

Since the European eel Anguilla anguilla L. cannot be bred in captivity, eel farms base their annual production on the capture of glass eels from river mouths in autumn and winter. This species has suffered a dramatic reduction in its populations, due to intensive capture of both glass eels and adults, resulting in increased cost for the annual renewal of glass eel stocks. Moreover, populations have been decreasing owing to several other factors (Feunteun 2002), such as massive exportation to other countries, the deterioration of their natural habitats and the importation of allochthonous parasites (Anguillicola crassus Kuwahara, Niimi and Itagaki 1974) from the Asian species (Koops and Hartmann 1989; Kennedy and Fitch 1990). Therefore, the development of methods for the reproduction of this species is necessary not only from an economical point of view, to meet the demands of fish farms, but also from an ecological point of view, to reduce the pressure on natural populations. In view of this, our group has centred its research since 1997 on trying to develop several techniques to help in the production of this species in captivity. Firstly, some experiments were carried out to develop maturation-inducing hormonal methods for males. The second step was the use of different techniques to evaluate the quality of the gametes, looking for fast and accurate results. At the same time, the development of hormonal induction protocols and the induction of spawning in the females made necessary the synchronization of gamete production. With the intention of solving this problem, we tackled sperm cryopreservation. Study of the physico-chemical characteristics of seminal plasma in good quality sperm samples was the basis for the design of cryopreservation media. Later, different factors such as the ionic composition, pH, cryoprotectants, or the presence of protective proteins, as well as different freezing-thawing methods, have been considered to try to improve spermatozoa survival post-cryopreservation.

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Authors and Affiliations

  1. Grupo de Acuicultura y Biodiversidad, Instituto de Ciencia y Tecnología Animal, Universidad Politécnica de Valencia, Camino de Vera, Valencia, s/n 46022, Spain

    Luz Pérez, David Peñaranda, Víctor Gallego & Juan Asturiano

Authors
  1. Luz Pérez
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  2. David Peñaranda
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  3. Víctor Gallego
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  4. Juan Asturiano
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Editor information

Editors and Affiliations

  1. Institute of Biology, Leiden University, POB 9516, RA Leiden, 2300, The Netherlands

    Guido van den Thillart

  2. UMR CNRS 5178 “Biology of Marine Organisms and Ecosystems” 7 rue Cuvier, CP 32, Museum National d'Histoire Naturelle DMPA, 75231 Paris cedex 05, France

    Sylvie Dufour

  3. Department of Chemical and Biological Science, University of Huddersfield Queensgate, HD1 3DH, UK

    J. Cliff Rankin

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Pérez, L., Peñaranda, D., Gallego, V., Asturiano, J. (2009). Testis Development, Sperm Quality Evaluation and Cryopreservation in the European Eel. In: van den Thillart, G., Dufour, S., Rankin, J.C. (eds) Spawning Migration of the European Eel. Fish & Fisheries Series, vol 30. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9095-0_14

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