頁籤選單縮合
| 題 名 | Temporal Population Genetics and COI Phylogeography of the Sandhopper Macarorchestia remyi (Amphipoda: Talitridae) |
|---|---|
| 作 者 | Pavesi, Laura; De Matthaeis, Elvira; Tiedemann, Ralph; Ketmaier, Valerio; | 書刊名 | Zoological Studies |
| 卷 期 | 50:2 2011.03[民100.03] |
| 頁 次 | 頁220-229 |
| 分類號 | 381.5 |
| 關鍵詞 | Macarorchestia remyi; Talitridae; Cytochrome oxidase I; Population genetics; |
| 語 文 | 英文(English) |
| 英文摘要 | In this study we assessed levels of genetic divergence and variability in 208 individuals of the supralittoral sandhopper Macarorchestia remyi, a species strictly associated with rotted wood stranded on sand beaches, by analyzing sequence polymorphisms in a fragment of the mitochondrial DNA (mtDNA) gene coding cytochrome oxidase subunit I (COI). The geographical distribution and ecology of the species are poorly known. The study includes 1 Tyrrhenian and 2 Adriatic populations sampled along the Italian peninsula plus a single individual found on Corfu Is. (Greece). The Tyrrhenian population was sampled monthly for 1 yr. Genetic data revealed a deep phylogeographic break between the Tyrrhenian and Adriatic populations with no shared haplotypes. The single individual collected on Corfù Is. carried the most common haplotype found in the Tyrrhenian population. A mismatch analysis could not reject the hypothesis of a sudden demographic expansion in almost all but 2 monthly samples. When compared to previous genetic data centered on a variety of Mediterranean talitrids, our results place M. remyi among those species with profound intraspecific divergence (sandhoppers) and dissimilar from beachfleas, which generally display little population genetic structuring. |
本系統中英文摘要資訊取自各篇刊載內容。