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Article: Responses of the limpet, Cellana grata (Gould 1859), to hypo-osmotic stress during simulated tropical, monsoon rains

TitleResponses of the limpet, Cellana grata (Gould 1859), to hypo-osmotic stress during simulated tropical, monsoon rains
Authors
KeywordsFreshwater
Limpet
Monsoon
Physiology
Rain
Tropical shores
Issue Date2007
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jembe
Citation
Journal Of Experimental Marine Biology And Ecology, 2007, v. 352 n. 1, p. 78-88 How to Cite?
AbstractAlthough heat stress is often cited as the dominant physical stress on tropical shores, intertidal organisms in regions with monsoonal climates are also regularly exposed to prolonged periods of heavy rainfall. Such events are predicted to have adverse physiological effects on individuals and may result in mortality. In a series of laboratory experiments, the impact of simulated monsoonal rains was investigated on the patellid limpet, Cellana grata. Sub-lethal responses in terms of body water content, body fluid osmolality and heart rate were measured in two different size cohorts maintained on horizontal and vertical substrata. Limpets were unable to achieve any effective behavioural isolation, and exposure to either simulated rainfall or diluted seawater resulted in both large and small C. grata gaining water with subsequent dilution of mantle water and haemolymph osmolalities. With increased duration of rainfall, dilution of body fluids increased with little difference between individuals on horizontal and vertical surfaces. Body fluids generally showed proportional dilution during prolonged rain, but in some individuals there was evidence for regulation of the haemolymph relative to the mantle fluid. Overall, smaller limpets were more susceptible to prolonged rainfall than large animals in terms of swelling of soft tissues and detachment and also had higher heart rates than large limpets. Both cohorts reduced heart rates with prolonged rainfall, suggesting a degree of metabolic depression, especially on horizontal surfaces. In small limpets, no difference in heart rate was found with substratum orientation, whereas large limpets had elevated heart rates on vertical as compared to horizontal substrata, when exposed to either simulated rainfall or washed with dilute seawater. This may reflect the increased energetic costs required to maintain a relatively larger body on a vertical surface under stressful conditions. Monsoonal rainfall during emersion, and subsequent dilution of seawater, therefore, have sub-lethal physiological and possible lethal effects on intertidal limpets. This influence has been largely overlooked, but coupled with the possible synergistic effects of thermal stress, monsoon rains are likely to play an important role in community dynamics on tropical shores. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/89285
ISSN
2015 Impact Factor: 1.796
2015 SCImago Journal Rankings: 1.029
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMorritt, Den_HK
dc.contributor.authorLeung, KMYen_HK
dc.contributor.authorPirro, MDen_HK
dc.contributor.authorYau, Cen_HK
dc.contributor.authorWai, TCen_HK
dc.contributor.authorWilliams, GAen_HK
dc.date.accessioned2010-09-06T09:54:55Z-
dc.date.available2010-09-06T09:54:55Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of Experimental Marine Biology And Ecology, 2007, v. 352 n. 1, p. 78-88en_HK
dc.identifier.issn0022-0981en_HK
dc.identifier.urihttp://hdl.handle.net/10722/89285-
dc.description.abstractAlthough heat stress is often cited as the dominant physical stress on tropical shores, intertidal organisms in regions with monsoonal climates are also regularly exposed to prolonged periods of heavy rainfall. Such events are predicted to have adverse physiological effects on individuals and may result in mortality. In a series of laboratory experiments, the impact of simulated monsoonal rains was investigated on the patellid limpet, Cellana grata. Sub-lethal responses in terms of body water content, body fluid osmolality and heart rate were measured in two different size cohorts maintained on horizontal and vertical substrata. Limpets were unable to achieve any effective behavioural isolation, and exposure to either simulated rainfall or diluted seawater resulted in both large and small C. grata gaining water with subsequent dilution of mantle water and haemolymph osmolalities. With increased duration of rainfall, dilution of body fluids increased with little difference between individuals on horizontal and vertical surfaces. Body fluids generally showed proportional dilution during prolonged rain, but in some individuals there was evidence for regulation of the haemolymph relative to the mantle fluid. Overall, smaller limpets were more susceptible to prolonged rainfall than large animals in terms of swelling of soft tissues and detachment and also had higher heart rates than large limpets. Both cohorts reduced heart rates with prolonged rainfall, suggesting a degree of metabolic depression, especially on horizontal surfaces. In small limpets, no difference in heart rate was found with substratum orientation, whereas large limpets had elevated heart rates on vertical as compared to horizontal substrata, when exposed to either simulated rainfall or washed with dilute seawater. This may reflect the increased energetic costs required to maintain a relatively larger body on a vertical surface under stressful conditions. Monsoonal rainfall during emersion, and subsequent dilution of seawater, therefore, have sub-lethal physiological and possible lethal effects on intertidal limpets. This influence has been largely overlooked, but coupled with the possible synergistic effects of thermal stress, monsoon rains are likely to play an important role in community dynamics on tropical shores. © 2007 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jembeen_HK
dc.relation.ispartofJournal of Experimental Marine Biology and Ecologyen_HK
dc.rightsJournal of Experimental Marine Biology and Ecology. Copyright © Elsevier BV.en_HK
dc.subjectFreshwateren_HK
dc.subjectLimpeten_HK
dc.subjectMonsoonen_HK
dc.subjectPhysiologyen_HK
dc.subjectRainen_HK
dc.subjectTropical shoresen_HK
dc.titleResponses of the limpet, Cellana grata (Gould 1859), to hypo-osmotic stress during simulated tropical, monsoon rainsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-0981&volume=352&spage=78&epage=88&date=2007&atitle=Responses+of+the+limpet,+Cellana+grata+(Gould+1859),+to+hypo-osmotic+stress+during+simulated+tropical,+monsoon+rainsen_HK
dc.identifier.emailLeung, KMY: kmyleung@hku.hken_HK
dc.identifier.emailYau, C: cynthia-yau@hkucc.hku.hken_HK
dc.identifier.emailWai, TC: waitc@hkucc.hku.hken_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityLeung, KMY=rp00733en_HK
dc.identifier.authorityYau, C=rp00829en_HK
dc.identifier.authorityWai, TC=rp00797en_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jembe.2007.07.002en_HK
dc.identifier.scopuseid_2-s2.0-35148826965en_HK
dc.identifier.hkuros140378en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35148826965&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume352en_HK
dc.identifier.issue1en_HK
dc.identifier.spage78en_HK
dc.identifier.epage88en_HK
dc.identifier.isiWOS:000250791400008-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridMorritt, D=7003560499en_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK
dc.identifier.scopusauthoridPirro, MD=22635784800en_HK
dc.identifier.scopusauthoridYau, C=7007038452en_HK
dc.identifier.scopusauthoridWai, TC=15039017100en_HK
dc.identifier.scopusauthoridWilliams, GA=7406082821en_HK

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