WHOOSHH

Evaluation of a Novel Floating Elver Trap (2017)

the question
the conclusion
the question

Karlstad University, Sweden Laboratory

Johan Watz

European juvenile eel (elver), Anguilla anguilla

How does a floating elver trap compare to a stationary elver trap?

the conclusion

The floating elver trap caught elver in both dark (night) and light (daytime) hours whereas the stationary trap only caught elver in dark hours. Across three separate trial pairwise comparisons, the floating trap caught significantly more elver (Lagan night Z=" 2.52," p=" 0.012," Lagan day Z="2.81," p="0.005" and Atran night Z="2.81," p="0.005)." The design features of the mobile floating trap with wide and limited length ramps along with directed attraction flow facilitated elver attraction, ramp entry and collection. The floating covered structure also produced a dark shaded environment which likely facilitated collection during daylight hours.

study report