Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/25603
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dc.contributor.authorMonticelli, David-
dc.contributor.authorRamos, J. A.-
dc.contributor.authorCatry, Teresa-
dc.contributor.authorPedro, Patricia-
dc.contributor.authorPaiva, Vitor H.-
dc.date.accessioned2014-04-28T11:28:18Z-
dc.date.available2014-04-28T11:28:18Z-
dc.date.issued2014-
dc.identifier.urihttp://hdl.handle.net/10316/25603-
dc.description.abstractMost attempts to link seabirds and climate/oceanographic effects have concerned the Atlantic and Pacific Oceans with comparatively few studies in the tropical Indian Ocean. This paper examines the reproductive response of the lesser noddy Anous tenuirostris to temporal fluctuations in oceanographic and climatic conditions using 8 years of monitoring data from Aride Island (Seychelles), tropical Western Indian Ocean. We tested the hypothesis that breeding parameters (mean hatching date, mean egg size, hatching and fledging successes) and chick growth are influenced by local, seasonal oceanographic conditions as expressed by ocean primary productivity (surface chlorophyll-a concentrations; CC), sea surface temperature (SST) and wind speed. We also examined the relationship between lesser noddy breeding parameters and climate conditions recorded at the basin-wide scale of the Indian Ocean (Indian Ocean Dipole Mode Index, DMI). Our findings suggest that birds had a tendency to lay slightly larger eggs during breeding seasons (years) with higher CC during AprileJune (pre-laying, laying and incubation periods). Hatching date was positively related to SST in AprileJune, with the regression parameters suggesting that each 0.5 C increase in SST meant a delay of approx.10 days in hatching date. A negative linear relationship was also apparent between hatching success and SST in JuneeAugust (hatching and chick-rearing periods), while the quadratic regression models detected a significant effect of wind speed in JuneeAugust on fledging success. Body mass increments of growing chicks averaged over 7-day periods were positively related with (2-week) lagged CC values and negatively related with (2-week) lagged SST values. No significant relationship between DMI and lesser noddy breeding parameters was found, but DMI indices were strongly correlated with local SST. Altogether, our results indicate that the reproduction of this top marine predator is dictated by fluctuations in local environmental conditions around the colony, while the effects of large-scale oceanographic processes (DMI) on our study population might be mediated by an effect on local SST.por
dc.description.sponsorshipDM and TC were supported by post-doctoral grants SFRH/BPD/ 66672/2009 and SFRH/BPD/46967/2008, respectively.por
dc.language.isoengpor
dc.publisherElsevier Ltd.por
dc.rightsopenAccesspor
dc.subjectbreeding phenologypor
dc.subjectchick mass gainpor
dc.subjectchlorophyll-apor
dc.subjectfledging successpor
dc.subjectIndian Ocean dipole modepor
dc.subjectocean primary productivitypor
dc.subjectsea surface temperaturepor
dc.titleReproductive parameters of tropical lesser noddies respond to local variations in oceanographic conditions and weatherpor
dc.typearticlepor
degois.publication.firstPage110por
degois.publication.lastPage118por
degois.publication.titleEstuarine, Coastal and Shelf Sciencepor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0272771413005507#por
dc.peerreviewedYespor
dc.identifier.doi10.1016/j.ecss.2013.12.026-
degois.publication.volume139por
item.languageiso639-1en-
item.grantfulltextopen-
item.fulltextCom Texto completo-
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
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