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Article: Production dynamics and growth of atyid shrimps (Decapoda:Caridina spp.) in 4 Hong Kong streams: The effects of site, season, and species

TitleProduction dynamics and growth of atyid shrimps (Decapoda:Caridina spp.) in 4 Hong Kong streams: The effects of site, season, and species
Authors
KeywordsAbundance
Asia
Benthos
Biomass
Instantaneous growth
Riparian shading
Secondary production
Tropical streams
Issue Date2006
PublisherNorth American Benthological Society. The Journal's web site is located at http://www.benthos.org
Citation
Journal Of The North American Benthological Society, 2006, v. 25 n. 2, p. 406-416 How to Cite?
AbstractTemporal patterns of abundance, biomass, and production of 3 populations of Caridina cantonensis (Atyidae) and 1 population of C. serrata were studied in 2 unshaded and 2 shaded Hong Kong streams. Monthly quantitative sampling was done in each of the 4 study sites over 2 y (April 2000-March 2002). Secondary production of C. cantonensis, estimated by the size-frequency method (P SF) and averaged over the study period, ranged from 1665 to 2274 mg ash-free dry mass (AFDM) m-2 y-1 according to site; P SF of C. serrata (810 mg AFDM m-2 y-1) was <1/2 that of C. cantonensis. Total shrimp production was greater at the 2 unshaded sites during both years. Interyear differences in PSF were not significant, but shrimp production was 10 to 83% higher during the dry season than the wet season, most notably in the 2 unshaded streams (≥40% higher). This seasonal difference probably was caused by mortality from spates associated with the summer monsoon. Production estimated by the instantaneous growth method showed the same trends as PSF, but yielded values 26 to 57% lower. Annual PSF/biomass ratios ranged from 2.02 to 3.89 and were correlated with cohort-specific growth rates of shrimp populations; neither parameter was directly related to the extent of shading. Instantaneous growth rates of Caridina spp. estimated from caged shrimps at each of the 4 study sites did not differ between years. Instantaneous growth rates in cages appeared correlated with cohort-specific growth rates of field populations, suggesting that the intra- and interspecific variations in PSF of Hong Kong atyids represent genuine ecological differences rather than methodological artifacts. Production of Caridina spp. was considerably higher than has been reported for other macroinvertebrate taxa in Hong Kong streams, constituting ∼10% of total macroinvertebrate production for these systems and demonstrating the importance of atyid shrimps in tropical stream food webs. © 2006 by The North American Benthological Society.
Persistent Identifierhttp://hdl.handle.net/10722/73344
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.accessioned2010-09-06T06:50:24Z-
dc.date.available2010-09-06T06:50:24Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of The North American Benthological Society, 2006, v. 25 n. 2, p. 406-416en_HK
dc.identifier.issn0887-3593en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73344-
dc.description.abstractTemporal patterns of abundance, biomass, and production of 3 populations of Caridina cantonensis (Atyidae) and 1 population of C. serrata were studied in 2 unshaded and 2 shaded Hong Kong streams. Monthly quantitative sampling was done in each of the 4 study sites over 2 y (April 2000-March 2002). Secondary production of C. cantonensis, estimated by the size-frequency method (P SF) and averaged over the study period, ranged from 1665 to 2274 mg ash-free dry mass (AFDM) m-2 y-1 according to site; P SF of C. serrata (810 mg AFDM m-2 y-1) was <1/2 that of C. cantonensis. Total shrimp production was greater at the 2 unshaded sites during both years. Interyear differences in PSF were not significant, but shrimp production was 10 to 83% higher during the dry season than the wet season, most notably in the 2 unshaded streams (≥40% higher). This seasonal difference probably was caused by mortality from spates associated with the summer monsoon. Production estimated by the instantaneous growth method showed the same trends as PSF, but yielded values 26 to 57% lower. Annual PSF/biomass ratios ranged from 2.02 to 3.89 and were correlated with cohort-specific growth rates of shrimp populations; neither parameter was directly related to the extent of shading. Instantaneous growth rates of Caridina spp. estimated from caged shrimps at each of the 4 study sites did not differ between years. Instantaneous growth rates in cages appeared correlated with cohort-specific growth rates of field populations, suggesting that the intra- and interspecific variations in PSF of Hong Kong atyids represent genuine ecological differences rather than methodological artifacts. Production of Caridina spp. was considerably higher than has been reported for other macroinvertebrate taxa in Hong Kong streams, constituting ∼10% of total macroinvertebrate production for these systems and demonstrating the importance of atyid shrimps in tropical stream food webs. © 2006 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.subjectAbundanceen_HK
dc.subjectAsiaen_HK
dc.subjectBenthosen_HK
dc.subjectBiomassen_HK
dc.subjectInstantaneous growthen_HK
dc.subjectRiparian shadingen_HK
dc.subjectSecondary productionen_HK
dc.subjectTropical streamsen_HK
dc.titleProduction dynamics and growth of atyid shrimps (Decapoda:Caridina spp.) in 4 Hong Kong streams: The effects of site, season, and speciesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0887-3593&volume=25&issue=2&spage=406&epage=416&date=2006&atitle=Production+dynamics+and+growth+of+atyid+shrimps+(Decapoda:Caridina+spp.)+in+4+Hong+Kong+streams:+the+effects+of+site,+season,+and+species-
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1899/0887-3593(2006)25[406:PDAGOA]2.0.CO;2en_HK
dc.identifier.scopuseid_2-s2.0-33744815350en_HK
dc.identifier.hkuros115258en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33744815350&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume25en_HK
dc.identifier.issue2en_HK
dc.identifier.spage406en_HK
dc.identifier.epage416en_HK
dc.identifier.isiWOS:000237891600012-
dc.publisher.placeCanadaen_HK
dc.identifier.scopusauthoridYam, RSW=8256687600en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK

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