Fish Avoidance Behaviour - Relation to a Specific Environmental Case in Agersø Sund and Evaluation of an Experimental Setup

Jing Yuan Feng, Jing Wang, Shamraiz Shehzad, Christina Fevejle Nielsen & Mads-Peter Jakob Dahl

Studenteropgave: Semesterprojekt


In the present study, the stability and applicability of a semi steep gradient avoidance test system, and the use of eel as a test species in avoidance tests have been assessed. The evaluation of mixing patterns in the test aquarium has been conducted by using pH measurements and dyed water. Eel behaviour has been observed by taking photos during the tests, thereby determining their location in the test aquarium. It is concluded that the system is too unstable to make a reproducible semi steep gradient, and therefore can not be used for conducting avoidance tests. Furthermore eels are proven to be inappropriate test species for use in avoidance tests because of their hiding behaviour and high tolerance to odours in water.

UddannelserMiljøbiologi, (Bachelor/kandidatuddannelse) Bachelor
Udgivelsesdato1 jan. 2006


  • European eel (Anguilla Angiulla)
  • Avoidance tests
  • Fluid dynamics
  • Steep gradient systems