The Yaqui catfish, Ictalurus pricei, is the only native ictalurid species described from north-west México and south-west USA. It is an endangered species owing to the decline and loss of most of its historical populations, mainly because of competition and hybridization with the non-native channel catfish, Ictalurus punctatus. The Arroyo Cajón Bonito is one of the few remnant populations of Yaqui catfish in the Yaqui River basin, and it is threatened by the presence of channel catfish that escaped from private culture facilities. Phylogenetic analysis of two mitochondrial and two nuclear genes was used to detect evidence of hybridization with channel catfish in a collection of 20 catfish from Arroyo Cajón Bonito. Fourteen putatively pure Yaqui catfishes, five hybrids and one channel catfish were detected. This study further highlights hybridization between channel and Yaqui catfish as the main threat to the remaining Yaqui catfish populations. We recommend urgent evaluation of the remnant populations of native catfish elsewhere and their current conservation status.
|Number of pages||8|
|Journal||Aquatic Conservation: Marine and Freshwater Ecosystems|
|State||Published - Nov 2021|
Bibliographical noteFunding Information:
We thank Anna Valer A. Clark and José Manuel Pérez‐Cantú for the use of facilities at Rancho San Bernardino and Rancho Los Ojos Calientes, and the access to sampling sites in the Arroyo Cajón Bonito. We also thank Chuck Minckley, Alton S. Livingstone, Gerardo Lagarda‐Lagarda, Brett Montgomery and Luis A. Calleja‐Tarín for assistance in sampling. Field collections were made under Mexican government licence SGPA/DGVS/00595/19. The first author received a fellowship from the Consejo Nacional de Ciencia y Tecnología (CONACyT) for Master of Science studies. This work was funded primarily by Desert Fishes Council conservation award for partial funding for gene sequencing, the ADVC Cuenca Los Ojos, and Arizona Game and Fish Department. We thank Dr Anthony A. Echelle and an anonymous reviewer for the improvement of the manuscript.
© 2021 John Wiley & Sons, Ltd.
- Yaqui catfish
- non-native channel catfish
- phylogenetic analysis
- south-west North America