Strong genetic differentiation among populations of the freshwater shrimp Caridina cantonensis in Hong Kong: Implications for conservation of freshwater fauna in urban areas

Ling Ming TSANG, Kwok Ho TSOI, Simon Kin-Fung CHAN, Tony King-Tung CHAN, Ka Hou CHU

Research output: Contribution to journalArticles

3 Citations (Scopus)

Abstract

Freshwater organisms generally exhibit strong genetic structuring. Although understanding the level and spatial distribution of genetic diversity is crucial for conservation management planning, such information has received little attention until recently in highly developed cities where local extinction attributed to habitat destruction and urbanisation is intense. We compared the genetic divergence in mitochondrial COI of the freshwater shrimp Caridina cantonensis collected from 32 sites in Hong Kong, to determine the connectivity among populations and the levels of genetic diversity of the shrimp. We found that shrimp from different streams are genetically highly differentiated and each stream always has its own unique haplotype groups, even though some of the streams are separated only by a few kilometres, indicating very limited gene flow across streams. Moreover, genetic diversity within each stream is very low, usually with a single haplotype dominating the entire population, and genetic differentiation was observed among tributaries from the same drainage. The high genetic diversity of these species over short distances has significant conservation implications because a substantial amount of biodiversity may have already been lost as a result of past development. Careful conservation planning is essential for future development in Hong Kong and other cities. Copyright © 2016 CSIRO.
Original languageEnglish
Pages (from-to)187-194
JournalMarine and Freshwater Research
Volume68
Issue number1
Early online dateMar 2016
DOIs
Publication statusPublished - 2017

Citation

Tsang, L. M., Tsoi, K. H., Chan, S. K.-F., Chan, T. K.-T., & Chu, K. H. (2017). Strong genetic differentiation among populations of the freshwater shrimp Caridina cantonensis in Hong Kong: Implications for conservation of freshwater fauna in urban areas. Marine and Freshwater Research, 68(1), 187-194.

Keywords

  • Conservation genetics
  • Genetic diversity
  • Population genetics

Fingerprint Dive into the research topics of 'Strong genetic differentiation among populations of the freshwater shrimp Caridina cantonensis in Hong Kong: Implications for conservation of freshwater fauna in urban areas'. Together they form a unique fingerprint.