Published in Scientific Papers. Series D. Animal Science, Vol. LX
Written by Tiberius-Marcel DANALACHE, Stefan DIACONESCU, Alin Marius BADILITA, György DEÁK, Elena HOLBAN, Carmen Georgeta NICOLAE
The hydrotechnic works often generate aquatic ecosystem disturbances. Sometimes they are local and short-term, but sometimes they cause significant long-term impact that may be irreversible. The present paper aims to analyze the possible impact of the maintenance works performed on Bastroe channel fairway on the populations’ dynamics of migratory anadromous fishes, sturgeon. The methodology implied sturgeon tagging and migration monitoring using ultrasonic telemetry technique during 2011-2014. The tags were inserted into the abdominal cavity through a simple surgical intervention, being set to transmit data related on swimming depth and water temperature towards receiver stations fixed on Chilia branch, upstream and downstream of Bastroe channel, Tulcea and Old Danube branches. The results showed that the distribution of the adult specimens during migration on Chilia and Tulcea branches was 53% - 47% (spring 2012/2014) and 31% - 69% in autumn 2013. A possible progressive warping of the Old Stambul and especially Musura branch, as well as an increase of the naval traffic on Bastroe channel will have major negative effects on upstream sturgeon migration for breeding.
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