Genetic assessment of the rare freshwater shrimp Caridina logemanni endemic to Hong Kong and its hybridisation with a widespread congener

2022 ◽  
Author(s):  
Lai Him Chow ◽  
Ling Ming Tsang ◽  
Ka Hou Chu ◽  
Ka Yan Ma
Keyword(s):  
Hong Kong ◽  
Freshwater Shrimp ◽  
Genetic Assessment

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

2017 ◽  
Vol 68 (1) ◽  
pp. 187 ◽  
Author(s):  
Ling Ming Tsang ◽  
Kwok Ho Tsoi ◽  
Simon Kin-Fung Chan ◽  
Tony King-Tung Chan ◽  
Ka Hou Chu
Keyword(s):  
Genetic Diversity ◽  
Hong Kong ◽  
Genetic Differentiation ◽  
Urban Areas ◽  
Habitat Destruction ◽  
Freshwater Shrimp ◽  
Genetic Structuring ◽  
Unique Haplotype ◽  
High Genetic Diversity ◽  
Mitochondrial Coi

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.

Verocytotoxin-producing Escherichia coli infection: The Hong Kong experience

1998 ◽  
Vol 13 (11-s4) ◽  
pp. S289-S293 ◽  
Author(s):  
SSY WONG ◽  
WC YAM ◽  
PHM LEUNG ◽  
PCY WOO ◽  
KY YUEN
Keyword(s):  
Escherichia Coli ◽  
Hong Kong ◽  
Escherichia Coli Infection

Abstracts of the Annual Scientific Meeting of the College of Surgeons of Hong Kong 20-21 May 2000

2000 ◽  
Vol 4 (2) ◽  
pp. A5-A5
Author(s):  
P.B.S. Lai ◽  
W.Y. Lau ◽  
S.S.M. Ng ◽  
P.T. Chui ◽  
K.L. Leung ◽  
...  
Keyword(s):  
Hong Kong ◽  
Scientific Meeting ◽  
Annual Scientific ◽  
Annual Scientific Meeting
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