MIGRATORY ABILITY OF ORCONECTES LIMOSUS THROUGH A FISHPASS AND NOTES ON ITS OCCURRENCE IN THE CZECH REPUBLIC

The occurrence of the spiny-cheek crayfish in the Czech Republic was first reported in the 1980´s in the Elbe River and is a result of its upstream migration from Germany. This study confirms that this species occurs in many other localities across the Czech Republic. Its migration ability was experimentally studied at a thirty-chambers fishpass located at a hydroelectric power station in the Elbe River. Group-marked crayfish were placed into 3 selected chambers. Their up- and downstream movement was then registered for 30 min after crayfish stocking. We found that a large portion of the experimental crayfish was passively carried along the stream and was caught in the lowest chamber. The movement of crayfish against the water current towards the higher-positioned chambers was not recorded. However, crayfish showed to have a high ability to hold their position in a strong water flow. Overall, 56.7 ± 9.43%, 6.7 ± 9.43% and 3.3 ± 4.71% of crayfish remained in the chamber of insertion and 23.3 ± 4.71%, 30.0 ± 14.14% and 26.7 ± 17.00% of crayfish migrated to the lower-positioned chambers.

Auteurs du document :

P. KOZÁK, T. POLICAR, Z. ĎURIŠ

Obtenir le document :

EDP Sciences

Mots clés :

Crayfish, Orconectes limosus, distribution, Czech Republic, activity, migration, fishpass, Écrevisse, Orconectes limosus, distribution, République Tchèque, activité, migration, passe à poisson

Thème (issu du Text Mining) :

FAUNE

Date :

2008-04-01

Format :

text/xml

Source :

https://doi.org/10.1051/kmae:2004010

Langue :

Anglais

Télécharger les documents :

https://www.kmae-journal.org/10.1051/kmae:2004010/pdf

Permalien :

https://www.documentation.eauetbiodiversite.fr/notice/migratory-ability-of-orconectes-limosus-through-a-fishpass-and-notes-on-its-occurrence-in-the-czech-0

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