Trophic overlap between non-native brown bullhead (Ameiurus nebulosus ) and native shortfin eel (Anguilla australis ) in shallow lakes

2018 ◽  
Vol 27 (4) ◽  
pp. 888-897 ◽  
Author(s):  
Kevin J. Collier ◽  
Michael A. Pingram ◽  
Laura Francis ◽  
Jeremy Garrett-Walker ◽  
Michele Melchior

2019 ◽  
Vol 26 (20) ◽  
pp. 20316-20324 ◽  
Author(s):  
Samuel Mach ◽  
Alexandr Jegorov ◽  
Zdeněk Šimek






2018 ◽  
Vol 69 (2) ◽  
pp. 135-143
Author(s):  
Loránd Barthó ◽  
Zsolt Sándor ◽  
Timea Bencsik


2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Daniel Matulić ◽  
Josip Barišić ◽  
Ivica Aničić ◽  
Tea Tomljanović ◽  
Roman Safner ◽  
...  


2009 ◽  
Vol 93 (1) ◽  
pp. 70-82 ◽  
Author(s):  
Luke R. Iwanowicz ◽  
Vicki S. Blazer ◽  
Stephen D. McCormick ◽  
Peter A. VanVeld ◽  
Christopher A. Ottinger


1999 ◽  
Vol 37 (2) ◽  
pp. 236-241 ◽  
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V. A. McFarland ◽  
L. S. Inouye ◽  
C. H. Lutz ◽  
A. S. Jarvis ◽  
J. U. Clarke ◽  
...  


2017 ◽  
Vol 68 (7) ◽  
pp. 1317 ◽  
Author(s):  
Phillip G. Jellyman ◽  
Joshua T. Bauld ◽  
Shannan K. Crow

Instream structures such as dams, weirs and culverts reduce diadromous fish (e.g. freshwater eels) biodiversity and abundance by restricting upstream migrations. Fish passes are used to facilitate fish passage around instream structures, but limited information is available about design aspects that influence the ability of fish to negotiate the structures. We used experimental ramps to evaluate the effects of surface type and slope on the climbing success of shortfin eel (Anguilla australis) elvers (total length <155mm). Climbing success was examined for three surface types (smooth plastic, sand and gravel, Miradrain) at slopes of 30, 50 and 70°. Elver climbing ability differed among substrates, with the highest success observed on the Miradrain surface (a moulded plastic drainage product). Climbing success decreased with increasing ramp slope. The mean length of elvers successfully negotiating the ramps was longer than that of elvers that failed to climb because only larger elvers could climb the Miradrain surface as ramp slope increased. Results indicated that the optimal ramp-designed passage for climbing species would be lined with Miradrain and set at an angle close to 30° and not exceeding 50°. Elver passage will be detrimentally affected by steep surfaces, which will be exacerbated if suboptimal ramp-surface types are used.



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