التفاصيل البيبلوغرافية
| العنوان: |
Genetic evidence of the native easternmost distribution limit of Rhynchocypris oxycephala (Actinopterygii: Cypriniformes) and its introduction to rivers in eastern Japan, based on mitochondrial DNA D-loop analysis. |
| المؤلفون: |
Kazuya Nishida, Noriyuki Koizumi, Akiko Minagawa, Atsushi Mori, Keiji Watabe, Takeshi Takemura |
| المصدر: |
Biogeography; 2023, Vol. 25 Issue 1, p45-54, 10p |
| مصطلحات موضوعية: |
DNA analysis, WATERSHEDS, CYPRINIFORMES, ACTINOPTERYGII, SPECIES distribution |
| مصطلحات جغرافية: |
JAPAN |
| مستخلص: |
Rhynchocypris oxycephala (Jordan & Snyder 1901) is distributed throughout western Japan. However, populations of this species in the easternmost distribution limit (Izu and Hakone) are suspected to be non-native. Additionally, this species was introduced into some river systems in eastern Japan (Kanto and Tohoku). We estimated the native distribution area of R. oxycephala populations, focusing on the easternmost distribution limit, and investigated the origin and introduction routes of this species into non-native areas using mitochondrial DNA D-loop analysis. Sampling was conducted in 50 river systems throughout the R. oxycephala distribution area, and 303 specimens were used for DNA analysis. D-loop sequences of 931–944 base pairs and 54 haplotypes were identified. Phylogenetic analyses showed that these haplotypes clustered into six geographically cohesive clades, and the haplotypes obtained from Izu and Hakone, Kanto, and Tohoku were identical or similar to those obtained from the Lake Biwa System. These findings indicated that the species populations in these areas were introduced from the Lake Biwa System. Plecoglossus altivelis altivelis and/or salmonid fishes have been transplanted to the river systems where R. oxycephala was introduced (except for one river), thus suggesting that R. oxycephala was unintentionally introduced from the Lake Biwa System via P. a. altivelis and/or salmonid fish transplantation. In contrast, the haplotypes obtained from the Lake Biwa System were not found in and to the west of the Okitsu River System, a region which ranges from Kyushu in the west to Tokai, near the Itoigawa-Shizuoka Tectonic Line in the east. Therefore, we concluded that the native easternmost distribution limit of the R. oxycephala populations was in the Okitsu River System near the ItoigawaShizuoka Tectonic Line. The present study provides biogeographical information on R. oxycephala that may be critical for planning suitable conservation measures. [ABSTRACT FROM AUTHOR] |
|
Copyright of Biogeography is the property of Biogeographical Society of Japan and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
