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Evidence of hybridization between Yaqui catfish Ictalurus pricei (Rutter, 1896) and channel catfish Ictalurus punctatus (Rafinesque, 1818) in north-west México revealed by analysis of mitochondrial and nuclear genes
Aquatic Conservation: Marine and Freshwater Ecosystems ( IF 2.4 ) Pub Date : 2021-09-08 , DOI: 10.1002/aqc.3709
Alexsandre Gutiérrez‐Barragán 1 , Francisco Javier García‐De León 2 , Alejandro Varela‐Romero 1 , Carlos Alonso Ballesteros‐Córdova 1 , José Manuel Grijalva‐Chon 1 , Enrique De la Re‐Vega 1
Affiliation  

  1. 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.
  2. 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.
  3. 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.


中文翻译:

通过对线粒体和核基因的分析揭示了墨西哥西北部的 Yaqui 鲶鱼 Ictalurus pricei(Rutter,1896 年)和沟鲶 Ictalurus punctatus(Rafinesque,1818 年)之间的杂交证据

  1. Yaqui鲶鱼,Ictalurus pricei,是在墨西哥西北部和美国西南部描述的唯一本地ictalurid物种。由于其大部分历史种群的减少和丧失,它是一种濒临灭绝的物种,主要是因为与非本地沟鲶的竞争和杂交,Ictalurus punctatus。Arroyo Cajón Bonito 是亚基河流域为数不多的亚基鲶鱼残余种群之一,它受到从私人养殖设施逃逸的沟鲶的威胁。
  2. 在来自 Arroyo Cajón Bonito 的 20 条鲶鱼的集合中,使用两个线粒体基因和两个核基因的系统发育分析来检测与沟鲶杂交的证据。检测到 14 条推定纯亚基鲶鱼、5 条杂交鲶鱼和 1 条沟鲶。
  3. 这项研究进一步强调了河豚和亚基鲶鱼之间的杂交是对剩余亚基鲶鱼种群的主要威胁。我们建议对其他地方的本地鲶鱼的残余种群及其当前的保护状况进行紧急评估。
更新日期:2021-11-10
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