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Article: Juvenile growth in barnacles: Combined effect of delayed metamorphosis and sub-lethal exposure of cyprids to low-salinity stress

TitleJuvenile growth in barnacles: Combined effect of delayed metamorphosis and sub-lethal exposure of cyprids to low-salinity stress
Authors
KeywordsBalanus Amphitrite
Barnacle
Delayed Metamorphosis
Juvenile Growth
Latent Effects
Low-Salinity Stress
Issue Date2007
PublisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.html
Citation
Marine Ecology Progress Series, 2007, v. 344, p. 173-184 How to Cite?
AbstractDelayed metamorphosis can affect post-metamorphic performance in a variety of marine invertebrate species, possibly through effects on larval energy reserves. Nevertheless, the consequences of the 'latent effects' of natural environmental conditions and the proximate causes of the effects have rarely been examined. We documented the combined effect of delayed metamorphosis and sub-lethal exposure of larvae to low-salinity stress on depletion of energy reserves, metamorphic success and juvenile growth rates for the estuarine barnacle Balanus amphitrite, both in the laboratory and in field outplant experiments. Acute (24 h) exposure of 0 d old cyprids to low salinity (10 psu) dramatically reduced juvenile growth rates (measured as basal diameter, dry weight and ash-free dry weight) for the first 5 d after metamorphosis, in both laboratory and field conditions, and the effects were similar to those resulting from delayed metamorphosis. There was an interaction between delayed metamorphosis and salinity effects on juvenile tissue growth rates. To determine how the negative effects of delayed metamorphosis observed in the laboratory might be modulated in the field under different nutrient conditions, we also outplanted juveniles from cyprids that had delayed metamorphosis for either 0 d (control) or 4 d at 2 intertidal sites that experienced different nutrient conditions. Surprisingly, surplus food availability in the juvenile habitat could not entirely compensate for the negative effects imposed by delayed metamorphosis on juvenile growth rates. Additionally, we examined whether or not the detrimental effects of delayed metamorphosis on growth were mediated through effects on juvenile feeding rates and feeding appendage (cirri) morphology. Interestingly, although 2 out of the 3 juvenile feeding cirri lengths were shorter than expected in delayed individuals, mean juvenile filtration rate was significantly higher in delayed individuals than in control individuals. Overall, our results emphasise that acute exposure of competent larvae to low-salinity stress negatively affects juvenile growth rates as severely as delayed metamorphosis, which may ultimately influence juvenile and adult population dynamics in the field. The cause of reduced post-metamorphic performance in young barnacles remains unclear, but does not seem to be caused by reduced capacity for feeding. © Inter-Research 2007.
Persistent Identifierhttp://hdl.handle.net/10722/179011
ISSN
2015 Impact Factor: 2.361
2015 SCImago Journal Rankings: 1.554
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorThiyagarajan, Ven_US
dc.contributor.authorPechenik, JAen_US
dc.contributor.authorGosselin, LAen_US
dc.contributor.authorQian, PYen_US
dc.date.accessioned2012-12-19T09:51:24Z-
dc.date.available2012-12-19T09:51:24Z-
dc.date.issued2007en_US
dc.identifier.citationMarine Ecology Progress Series, 2007, v. 344, p. 173-184en_US
dc.identifier.issn0171-8630en_US
dc.identifier.urihttp://hdl.handle.net/10722/179011-
dc.description.abstractDelayed metamorphosis can affect post-metamorphic performance in a variety of marine invertebrate species, possibly through effects on larval energy reserves. Nevertheless, the consequences of the 'latent effects' of natural environmental conditions and the proximate causes of the effects have rarely been examined. We documented the combined effect of delayed metamorphosis and sub-lethal exposure of larvae to low-salinity stress on depletion of energy reserves, metamorphic success and juvenile growth rates for the estuarine barnacle Balanus amphitrite, both in the laboratory and in field outplant experiments. Acute (24 h) exposure of 0 d old cyprids to low salinity (10 psu) dramatically reduced juvenile growth rates (measured as basal diameter, dry weight and ash-free dry weight) for the first 5 d after metamorphosis, in both laboratory and field conditions, and the effects were similar to those resulting from delayed metamorphosis. There was an interaction between delayed metamorphosis and salinity effects on juvenile tissue growth rates. To determine how the negative effects of delayed metamorphosis observed in the laboratory might be modulated in the field under different nutrient conditions, we also outplanted juveniles from cyprids that had delayed metamorphosis for either 0 d (control) or 4 d at 2 intertidal sites that experienced different nutrient conditions. Surprisingly, surplus food availability in the juvenile habitat could not entirely compensate for the negative effects imposed by delayed metamorphosis on juvenile growth rates. Additionally, we examined whether or not the detrimental effects of delayed metamorphosis on growth were mediated through effects on juvenile feeding rates and feeding appendage (cirri) morphology. Interestingly, although 2 out of the 3 juvenile feeding cirri lengths were shorter than expected in delayed individuals, mean juvenile filtration rate was significantly higher in delayed individuals than in control individuals. Overall, our results emphasise that acute exposure of competent larvae to low-salinity stress negatively affects juvenile growth rates as severely as delayed metamorphosis, which may ultimately influence juvenile and adult population dynamics in the field. The cause of reduced post-metamorphic performance in young barnacles remains unclear, but does not seem to be caused by reduced capacity for feeding. © Inter-Research 2007.en_US
dc.languageengen_US
dc.publisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.htmlen_US
dc.relation.ispartofMarine Ecology Progress Seriesen_US
dc.subjectBalanus Amphitriteen_US
dc.subjectBarnacleen_US
dc.subjectDelayed Metamorphosisen_US
dc.subjectJuvenile Growthen_US
dc.subjectLatent Effectsen_US
dc.subjectLow-Salinity Stressen_US
dc.titleJuvenile growth in barnacles: Combined effect of delayed metamorphosis and sub-lethal exposure of cyprids to low-salinity stressen_US
dc.typeArticleen_US
dc.identifier.emailThiyagarajan, V: rajan@hkucc.hku.hken_US
dc.identifier.authorityThiyagarajan, V=rp00796en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.3354/meps06931en_US
dc.identifier.scopuseid_2-s2.0-34748815176en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34748815176&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume344en_US
dc.identifier.spage173en_US
dc.identifier.epage184en_US
dc.identifier.eissn1616-1599-
dc.identifier.isiWOS:000249816300015-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridThiyagarajan, V=6602476830en_US
dc.identifier.scopusauthoridPechenik, JA=7003265923en_US
dc.identifier.scopusauthoridGosselin, LA=8735252200en_US
dc.identifier.scopusauthoridQian, PY=35240648600en_US

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