- 期刊
Historical Decline in the Japanese Eel Anguilla japonica in Northern Taiwan Inferred from Temporal Genetic Variations
並列摘要
The existence of temporal genetic variations was tested for in 6 polymorphic microsatellite DNA loci of 89 Japanese eel Anguilla japonica collected from a single location in the Tanshui River Estuary, northern Taiwan during 1997-1999. The high Nei's genetic identity coefficients (0.868-0.941) and exact test of temporal genetic structure revealed no significant differentiation (p ＞ 0.05) among cohorts. Parameters of genetic diversity were examined including mean observed heterozygosity (Ho) (0.695-0.732) and change in the total number of alleles per year (na) (73-81). Significant deviations from Hardy-Weinberg equilibrium appeared in 5 of 6 loci, due to an insufficient number of heterozygous individuals in all cohorts. Totals of 22 private and 14 solitary missing alleles were found in all 6 loci. The decrease in numbers of total alleles and private alleles and the increased number of solitary alleles in consecutive years suggested that genetic polymorphism was gradually decreasing. By Bayesian parameters assay, we found that the effective population size was declining. The demographic decline estimated to be 3500-8000 years ago, is significant due to large-scale events such as oceangeographic changes since the most recent glacial stage.
延伸閱讀
- Chang, K. C., Han, Y. S., & Tzeng, W. N. (2007). Population Genetic Structure among Intra-Annual Arrival Waves of the Japanese Eel Anguilla japonica in Northern Taiwan. Zoological Studies, 46(5), 583-590. https://www.airitilibrary.com/Article/Detail?DocID=10215506-200709-46-5-583-590-a
- Chan, K. K. (1996). Population genetics of the Japanese eel : anguilla japonica (temminck & schlegel) [doctoral dissertation, The University of Hong Kong]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0029-1812201200007169
- Liu, L. L., & Liao, H. H. (1995). Allozyme Variation of the Japanese Eel Anguilla Japonica Among Collections From Three Different Locations in Taiwan. 臺灣水產學會刊, 22(3), 247-253. https://doi.org/10.29822/JFST.199509.0006
- Chang, F. Y. (2013). Long term changes of population genetic structure of the giant mottled eel Anguilla marmorata in Taiwan [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2013.01945
- 廖怡芬（2008）。Spatial and temporal analysis of population genetic structure of the Japanese eel in Taiwan and Japan〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2008.01266