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. 2014 Oct 3;5:35. doi: 10.1186/2041-9139-5-35

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© Espinasa et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Prey competition in the dark with pairs of 4 week post-fertilization fish larvae. (A) Diagram of the experimental design. (B, D) Distribution histogram showing the number of Artemia nauplii eaten by each type of fish during the paired competitions. In (B), P = 0.076 and in (C) P = 0.7253 for paired matches comparisons (Wilcoxon paired test). (C, E) Pie charts showing the distribution of ‘winner’ fish, that is, the fish type showing the highest numbers of Artemia larvae in their stomach. Cave fish globally outcompeted surface fish in the prey capture competition (C, P = 0.0097**; Fisher’s exact test), while surface fish with lensectomy performed equally well to surface fish raised in darkness (E, P = 0.7688; Fisher’s exact test).