Supplementary Files
Keywords
Bogotá river
Suárez river
Tota lake
threatened species
How to Cite
Abstract
To compare the relative abundance of Grundulus bogotensis in two river basins and the diet of the populations of three basins in the Cundiboyacense plateau, we sampled 10 localities using electrofishing equipment between March and June 2006. The relative abundance in each locality was expressed as the number of fish caught per hour on a 100m stretch; any significant differences in relative abundance among basins were identified via a Kruskal-Wallis test. To quantify the diet, we used the volumetric method. Similarities between the basins were determined using three multivariate analyzes: nonmetric multidimensional scaling, analysis of similarity and similarity percentages. In the end, we collected a total of 675 individuals during 600 minutes of capture effort. The abundance of this species in the Bogotá river basin was significantly lower compared to that of the Suárez basin. The dietary composition, of autochthonous origin, primarily immature insects and microcrustaceans and the volume of items proved similar between the basins. In conclusion, the dietary analysis indicated a similarity exceeding 60% in the feed resource use for the three basins. The relative abundance of populations of G. bogotensis in the Bogotá river basin was lower than in the Suárez river basin, the latter having, possibly, the greatest abundance of this species throughout its range. The data suggests the most favorable conditions for the survival of the species in Lake Tota.
Univ. Sci. is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights. Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.