File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Genetic differentiation of Caridina cantonensis (Decapoda:Atyidae) in Hong Kong streams

TitleGenetic differentiation of Caridina cantonensis (Decapoda:Atyidae) in Hong Kong streams
Authors
KeywordsConservation
Dispersal
Freshwater shrimps
RAPD
Tropical streams
Issue Date2005
PublisherNorth American Benthological Society. The Journal's web site is located at http://www.benthos.org
Citation
Journal Of The North American Benthological Society, 2005, v. 24 n. 4, p. 845-857 How to Cite?
AbstractCaridina cantonensis Yu 1938 is an atyid shrimp that is widespread in southern China, including Hong Kong. It is a fully freshwater species with an abbreviated larval development lacking planktonic stages. The population genetics of C. cantonensis in Hong Kong streams was studied at inter- and intradrainage scales using random amplified polymorphic DNA (RAPD) markers. Shrimps displayed low levels of within-population genetic variation (≤20% of total genotypic variance) but high levels of among-population variation (>50% of total genotypic variance) at both scales. High interdrainage genetic differentiation indicated that dispersal among catchments was limited, whereas high differentiation among populations at the intradrainage scale mainly resulted from natural barriers such as waterfalls. The effect of man-made barriers on population differentiation at the intradrainage scale was less marked than at the interdraineage scale. Levels of gene flow among populations within and among drainage systems were low, the estimated number of effective migrants/generation (Nem) was <0.1, and there was a trend toward relatively fewer alleles and lower heterozygosity in upstream populations than in downstream populations. Genetic differentiation between lowland populations from adjacent drainages was lower than for other pairwise combinations of populations, suggesting that interdrainage dispersal is likely during floods. The genetic structure of C. cantonensis populations in Hong Kong streams indicates that adaptation to local conditions in individual streams or sites within streams probably occurred. At a regional scale, this process might account for the large number of stenotopic species of Caridina in Asia. © 2005 by The North American Benthological Society.
Persistent Identifierhttp://hdl.handle.net/10722/73475
ISSN
2013 Impact Factor: 2.706
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYam, RSWen_HK
dc.contributor.authorDudgeon, Den_HK
dc.date.accessioned2010-09-06T06:51:36Z-
dc.date.available2010-09-06T06:51:36Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of The North American Benthological Society, 2005, v. 24 n. 4, p. 845-857en_HK
dc.identifier.issn0887-3593en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73475-
dc.description.abstractCaridina cantonensis Yu 1938 is an atyid shrimp that is widespread in southern China, including Hong Kong. It is a fully freshwater species with an abbreviated larval development lacking planktonic stages. The population genetics of C. cantonensis in Hong Kong streams was studied at inter- and intradrainage scales using random amplified polymorphic DNA (RAPD) markers. Shrimps displayed low levels of within-population genetic variation (≤20% of total genotypic variance) but high levels of among-population variation (>50% of total genotypic variance) at both scales. High interdrainage genetic differentiation indicated that dispersal among catchments was limited, whereas high differentiation among populations at the intradrainage scale mainly resulted from natural barriers such as waterfalls. The effect of man-made barriers on population differentiation at the intradrainage scale was less marked than at the interdraineage scale. Levels of gene flow among populations within and among drainage systems were low, the estimated number of effective migrants/generation (Nem) was <0.1, and there was a trend toward relatively fewer alleles and lower heterozygosity in upstream populations than in downstream populations. Genetic differentiation between lowland populations from adjacent drainages was lower than for other pairwise combinations of populations, suggesting that interdrainage dispersal is likely during floods. The genetic structure of C. cantonensis populations in Hong Kong streams indicates that adaptation to local conditions in individual streams or sites within streams probably occurred. At a regional scale, this process might account for the large number of stenotopic species of Caridina in Asia. © 2005 by The North American Benthological Society.en_HK
dc.languageengen_HK
dc.publisherNorth American Benthological Society. The Journal's web site is located at http://www.benthos.orgen_HK
dc.relation.ispartofJournal of the North American Benthological Societyen_HK
dc.subjectConservationen_HK
dc.subjectDispersalen_HK
dc.subjectFreshwater shrimpsen_HK
dc.subjectRAPDen_HK
dc.subjectTropical streamsen_HK
dc.titleGenetic differentiation of Caridina cantonensis (Decapoda:Atyidae) in Hong Kong streamsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0887-3593&volume=24&issue=4&spage=845&epage=857&date=2005&atitle=Genetic+differentiation+of+Caridina+cantonensis+(Decapoda:Atyidae)+in+Hong+Kong+streams-
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1899/05-022.1en_HK
dc.identifier.scopuseid_2-s2.0-28844499379en_HK
dc.identifier.hkuros125001en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-28844499379&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume24en_HK
dc.identifier.issue4en_HK
dc.identifier.spage845en_HK
dc.identifier.epage857en_HK
dc.identifier.isiWOS:000233839300010-
dc.publisher.placeCanadaen_HK
dc.identifier.scopusauthoridYam, RSW=8256687600en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats