Ann. Limnol. - Int. J. Lim.
Volume 54, 2018
|Number of page(s)||5|
|Published online||14 September 2018|
The early catfish catches the worm: predation of Corydoras aeneus (Siluriformes, Callichthyidae) on freshwater nematodes
University of Bielefeld, Animal Ecology,
2 Université de Toulouse, EcoLabUMR 5245 CNRS, INPT, UPS, ENSAT, Toulouse, France
3 Zoo Schwerin gGmbH, Schwerin, Germany
* Corresponding author: firstname.lastname@example.org
Accepted: 18 June 2018
In this study, we measured the daily consumption of four different nematode species by a small freshwater catfish species, Corydoras aeneus (Gill, 1858). Consumption of nematodes by fishes was significant with a single C. aeneus individual being able to consume in 24 h between 40 581 and 75 849 adult nematodes depending on the nematode species offered. This represented the ingestion of up to 238 mg wet weight when considering the largest nematode species: Panagrellus redivivus. Our results strengthen the growing evidence of a significant trophic channel existing between meiobenthic invertebrates like nematodes and small bottom-feeding fishes like C. aeneus. We also discuss the relevance of using P. redivivus as live food for rearing C. aeneus which is a popular ornamental fish.
Key words: Predator-prey interaction / aquaculture / benthic ecology / Caenorhabditis elegans / Panagrellus redivivus
© N. Majdi et al., published by EDP Sciences, 2018
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