Genetic Structure of the Endemic Fiddler Crab Uca (Xeruca) formosensis on the West Coast of Taiwan.

IF 1.5 3区 生物学 Q2 ZOOLOGY
Kun-Chin Hung, Ching-Yu Liou, Chih-Chung Wen, Hui-Chen Lin
{"title":"Genetic Structure of the Endemic Fiddler Crab <i>Uca</i> (<i>Xeruca</i>) <i>formosensis</i> on the West Coast of Taiwan.","authors":"Kun-Chin Hung,&nbsp;Ching-Yu Liou,&nbsp;Chih-Chung Wen,&nbsp;Hui-Chen Lin","doi":"10.6620/ZS.2023.62-24","DOIUrl":null,"url":null,"abstract":"<p><p><i>Xeruca formosensis</i> is the only endemic species of fiddler crab on the west coast of Taiwan. However, its natural habitats and populations have been compromised by excessive anthropogenic activities and improper land use over the past four decades. In light of these changes, we sought to evaluate the genetic diversity and gene flow of the species by examining the genetic variation of <i>X. formosensis</i> at different sampling locations. To this end, we performed molecular analyses of three endonuclease-amplified fragment length polymorphisms (TE-AFLP) and the cytochrome oxidase subunit I (<i>COI</i>) marker from leg muscle samples. We found that the genetic variation within sampling locations was higher than that among sampling locations, and the expected heterozygosity of genetic diversity (H<sub>j</sub>) was 0.152 for TE-AFLP data. Meanwhile, the <i>COI</i> marker showed high haplotype diversity (<i>h</i> = 0.976 ± 0.008) and a low genetic differentiation level (<i>F</i><sub>ST</sub> = 0.021) in <i>X. formosensis</i> populations. Importantly, the genetic connectivity of <i>X. formosensis</i> may be influenced by larval-stage crabs drifting between coastal and marine habitats. As such, crab gene flow is promoted among populations by larval exchange via nearshore currents. Although <i>X. formosensis</i> has high gene flow, the species could undergo an extinction crisis if the population sizes continue to decline, as with most endangered species. In order to maintain the natural habitats and population size of <i>X. formosensis</i>, long-term monitoring and investigation will be necessary.</p>","PeriodicalId":49331,"journal":{"name":"Zoological Studies","volume":"62 ","pages":"e24"},"PeriodicalIF":1.5000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10475467/pdf/zoolstud-62-024.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zoological Studies","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.6620/ZS.2023.62-24","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ZOOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Xeruca formosensis is the only endemic species of fiddler crab on the west coast of Taiwan. However, its natural habitats and populations have been compromised by excessive anthropogenic activities and improper land use over the past four decades. In light of these changes, we sought to evaluate the genetic diversity and gene flow of the species by examining the genetic variation of X. formosensis at different sampling locations. To this end, we performed molecular analyses of three endonuclease-amplified fragment length polymorphisms (TE-AFLP) and the cytochrome oxidase subunit I (COI) marker from leg muscle samples. We found that the genetic variation within sampling locations was higher than that among sampling locations, and the expected heterozygosity of genetic diversity (Hj) was 0.152 for TE-AFLP data. Meanwhile, the COI marker showed high haplotype diversity (h = 0.976 ± 0.008) and a low genetic differentiation level (FST = 0.021) in X. formosensis populations. Importantly, the genetic connectivity of X. formosensis may be influenced by larval-stage crabs drifting between coastal and marine habitats. As such, crab gene flow is promoted among populations by larval exchange via nearshore currents. Although X. formosensis has high gene flow, the species could undergo an extinction crisis if the population sizes continue to decline, as with most endangered species. In order to maintain the natural habitats and population size of X. formosensis, long-term monitoring and investigation will be necessary.

台湾西海岸特有招潮蟹Uca的遗传结构。
台湾招潮蟹(Xeruca formosensis)是台湾西海岸唯一的特有种。然而,在过去四十年中,由于过度的人为活动和不当的土地利用,其自然栖息地和种群数量受到了损害。在此基础上,本研究通过对不同取样地点台湾青松的遗传变异进行分析,以评估其遗传多样性和基因流。为此,我们对来自腿部肌肉样本的三种内切酶扩增片段长度多态性(TE-AFLP)和细胞色素氧化酶亚基I (COI)标记进行了分子分析。我们发现采样点内的遗传变异高于采样点间的遗传变异,TE-AFLP数据的遗传多样性杂合度(Hj)为0.152。COI标记在台湾桤木居群中具有较高的单倍型多样性(h = 0.976±0.008)和较低的遗传分化水平(FST = 0.021)。重要的是,台湾X.的遗传连通性可能受到在沿海和海洋栖息地之间漂流的幼虫期螃蟹的影响。因此,通过近岸洋流的幼虫交换促进了种群间的螃蟹基因流动。虽然台湾人有很高的基因流,但如果种群规模持续下降,该物种可能会像大多数濒危物种一样面临灭绝危机。为了维持台湾松的自然生境和种群规模,有必要进行长期的监测和调查。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Zoological Studies
Zoological Studies 生物-动物学
CiteScore
2.80
自引率
6.20%
发文量
35
审稿时长
6-12 weeks
期刊介绍: Zoological Studies publishes original research papers in five major fields: Animal Behavior, Comparative Physiology, Evolution, Ecology, and Systematics and Biogeography. Manuscripts are welcome from around the world and must be written in English. When the manuscript concerns the use of animals or specimens in research, a statement must be included to the effect that the author(s) has adhered to the legal requirements of the country in which the work was carried out or to any institutional guidelines.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信