Conservation status and natural history of ctenomys, Tuco-Tucos in Bolivia

Scott L. Gardner, Sebastian Botero-Cañola, Enzo Aliaga-Rossel, Altangerel Tsogtsaikhan Dursahinhan, Jorge Salazar-Bravo

Research output: Contribution to journalArticlepeer-review

Abstract

The genus Ctenomys consists of about 70 species and in addition to the Geomyidae of the Nearctic, Neotropical tuco-tucos represent a we-ll-documented case of diversification in the subterranean biotype. Here we will: i) Provide an updated summary of the natural history of the 12 species of extant tuco-tucos from Bolivia; ii) Update information on distributions of each species; and iii) Using ecological niche modeling, evaluate recent and projected habitat transformation or habitat degradation within the known range of each species to provide a preliminary assessment of the preservation or conservation status of ctenomyids within Bolivia. We follow Gardner et al. (2014) and combine species summaries with both updated published and new data to compile a complete list of known extant species of tuco-tucos from Bolivia. Occurrence data for Ctenomys in Bolivia and surrounding areas were extracted from the database Arctos and GBIF. All individual specimen-based locality records were checked and georeferenced by referring to original museum collection records. We created species distribution models for the species with enough locality records using climate and soil data, while for the rest of the species we estimated the ranges based on the known occurrence localities. Finally, we quantified the amount of large-scale habitat conversion occurring within each species range, as well as the potential effect of climatic change on species distribution. Here we present information regarding the biology of tuco-tuco (Ctenomys) species known to occur in Bolivia, including unpublished natural history data such as habitat association, interactions and activity patterns gathered by the authors through extensive field work. Besides this, we estimated the current distribution of Ctenomys species, quantified large-scale habitat transformation within each species range and assessed the potential effect of climatic change on five tuco-tuco species. We found that the habitats within the ranges of C. boliviensis and C. steinbachi have experienced significant land-cover conversions in recent years. We also show that C. opimus, as well as the above mentioned species are expected to undergo range contractions resulting from climatic change by 2070. Our review shows that there is a dearth of information regarding natural history, taxonomy and distribution for many Bolivian tuco-tuco species. Nonetheless, the information presented here can be a tool for directing and focusing field studies of these species. This is of great importance if we take into account that most of the Bolivian tuco-tu-cos are subject to one or several conservation/preservation threats. These include: Habitat destruction via land use or climatic changes in conjunc-tion with geographic ranges of Ctenomys that are small in areal extent and which in many cases are not adequately covered by protected areas.

Original languageEnglish
Pages (from-to)15-36
Number of pages22
JournalTherya
Volume12
Issue number1
DOIs
StatePublished - 2021

Bibliographical note

Funding Information:
This work was funded in part by the National Science Foundation awards to Sydney Anderson, Terry L. Yates, Scott L. Gardner, Joseph A. Cook, and Jorge Salazar-Bravo (BSR-8612329 to SLG; BSR-9024816 to SLG; DEB-9496263 to SLG; DEB9631295 to SLG; DEB-0097019 to SLG; DEB0717214 to SLG; DBI-0646356 to SLG; BSR 89-20617 to TLY; BSR 90-15454 to TLY, SA, and JAC; INT-9417252 to TLY and JSB) and from NATO Collaborative Research Grant (CRG No. 920612, to SLG). Collaborating institutions in Bolivia included the Uni-versidad Autónoma Gabriel René Moreno, the Zoológico Municipal Fauna Sudamericana (both of Santa Cruz de la Sierra), the Colección Boliviana de Fauna of the National Museum of Natural History, La Paz, and the Bolivian Academy of Sciences, La Paz. Noel Kempff Mercado, late director of the Zoológico Municipal Fauna Sudamericana (Santa Cruz de la Sierra), was instrumental in assisting our work from 1984-1986. All images made by SLG with special thanks to the late Lynn Hertel for assistance with inked drawings. This paper was improved substantially by the constructively critical comments of two anonymous reviewers.

Funding Information:
This work was funded in part by the National Science Foundation awards to Sydney Anderson, Terry L. Yates, Scott L. Gardner, Joseph A. Cook, and Jorge Salazar-Bravo (BSR-8612329 to SLG; BSR-9024816 to SLG; DEB-9496263 to SLG; DEB9631295 to SLG; DEB-0097019 to SLG; DEB0717214 to SLG; DBI-0646356 to SLG; BSR 89-20617 to TLY; BSR 90-15454 to TLY, SA, and JAC; INT-9417252 to TLY and JSB) and from NATO Collaborative Research Grant (CRG No. 920612, to SLG). Collaborating institutions in Bolivia included the Universidad Autónoma Gabriel René Moreno, the Zoológico Municipal Fauna Sudamericana (both of Santa Cruz de la Sierra), the Colección Boliviana de Fauna of the National Museum of Natural History, La Paz, and the Bolivian Academy of Sciences, La Paz. Noel Kempff Mercado, late director of the Zoológico Municipal Fauna Sudamericana (Santa Cruz de la Sierra), was instrumental in assisting our work from 1984-1986. All images made by SLG with special thanks to the late Lynn Hertel for assistance with inked drawings. This paper was improved substantially by the construc-tively critical comments of two anonymous reviewers.

Publisher Copyright:
© 2021 Asociación Mexicana de Mastozoología, www.mastozoologiamexicana.org.

Keywords

  • Bolivia
  • Caviomorpha
  • Climate change
  • Ctenomyidae
  • Ctenomys
  • Hystricomorpha
  • Land use change
  • Natural history
  • Species distribution model
  • Subterranean rodents

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