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Supplemental Information

Figure 1 Map

Mexico, showing the Ciénega Churince in Cuatro Ciénegas, Coahuila.

DOI: 10.7287/peerj.preprints.2154v1/supp-1

Figure 2 Image of study area

Map of the Churince system.

DOI: 10.7287/peerj.preprints.2154v1/supp-2

Figure 3

Trophic spectrum of the fish community.

DOI: 10.7287/peerj.preprints.2154v1/supp-3

Figure 4

Simpson’s similarity index for the G. marshi groups in Laguna Intermedia and in the freshwater spring Manantial de Agua Dulce.

DOI: 10.7287/peerj.preprints.2154v1/supp-4

Figure 5

Bray-Curtis similarity index for the species ingested, based on diet composition and expressed by the IRI.

DOI: 10.7287/peerj.preprints.2154v1/supp-5

Figure 6

Bray-Curtis index to rank species according to the similarity of the species in the diet.

DOI: 10.7287/peerj.preprints.2154v1/supp-6

Figure 7

Simplified trophic chain.

DOI: 10.7287/peerj.preprints.2154v1/supp-7

Table 1

Collected species and their specimens, following the division of the Ciénega Churince.

DOI: 10.7287/peerj.preprints.2154v1/supp-8

Table 2

Summary of the trophic spectrum of the Ciénega Churince fish community. IRI: Index of Relative Importance, RIa: Index of Absolute Importance, Q: feeding coefficient. Food items in the diet are classified as primary , secondary and rare .

DOI: 10.7287/peerj.preprints.2154v1/supp-9

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Ariana Hernández conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Hector S Espinosa-Pérez conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Valeria Souza analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

Colección Nacional de Peces IBUNAM

SAGARPA fishing permit No. PPF/DGOPA-140/14-15 to Hector Espinosa

Data Deposition

The following information was supplied regarding data availability:

CNPE-IBUNAM Fish Collection

Funding

Slim Foundation and WWF The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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