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Author |
Pierrat Benjamin, Saucde Thomas, Laffont Rmi, Ridder Chantal De, Festeau Alain, David Bruno, |
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Title |
Large-scale distribution analysis of Antarctic echinoids using ecological niche modelling
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Journal Article |
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Year |
2012 |
Publication |
MARINE ECOLOGY-PROGRESS SERIES |
Abbreviated Journal  |
Mar. Ecol. Prog. Ser. |
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Volume |
463 |
Issue |
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Pages |
215-230 |
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Abstract |
ABSTRACT: Understanding the factors that determine the distribution of taxa at various spatial scales is a crucial challenge in the context of global climate change. This holds particularly true for polar marine biota that are composed of both highly adapted and vulnerable faunas. We analysed the distribution of 2 Antarctic echinoid species, Sterechinus antarcticus and S. neumayeri, at the scale of the entire Southern Ocean using 2 niche modelling procedures. The performance of distribution models was tested with regard to the known ecology of the species. The respective contributions of environmental parameters are discussed along with the putative roles played by biotic interactions and biogeographic processes. Depth was the parameter that contributed most to both distribution models, whereas sea ice coverage and sea surface temperature had significant contributions for S. neumayeri only. Suitability maps of the 2 species were mostly similar, with a few notable differences. The Campbell Plateau and Tasmania were predicted as suitable areas for S. antarcticus only, while S. neumayeri was restricted to the south of the Antarctic Polar Front. However, numerous sampling data attest that S. antarcticus is absent from the Campbell Plateau and from Tasmania. Different hypotheses are formulated to explain the mismatch between observed and modelled distribution data. They stress the putative roles played by both oceanographic barriers to dispersal (Antarctic Polar Front), biotic factors (species exclusion patterns) and biogeographic processes (ongoing dispersal). |
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1044;1124 |
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Bachelor's thesis |
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0171-8630 |
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yes |
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Serial |
4236 |
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Author |
Jaeger A, Jaquemet S, Phillips RA, Wanless RM, Richard P, Cherel Y, |
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Title |
Stable isotopes document inter- and intra-specific variation in feeding ecology of nine large southern Procellariiformes
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Journal Article |
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Year |
2013 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
490 |
Issue |
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Pages |
255-266 |
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Abstract |
Investigating the foraging ecology of seabirds is especially challenging given their wide-ranging movements and the practical difficulties of obtaining unbiased information on their feeding behavior. Despite the development of animal-borne tracking devices, several limitations preclude investigations at the scale of a whole community in a given season or year, and, until recently, during the non-breeding period. Here we analyzed δ13C and δ15N in feathers of chicks and adults to investigate inter- and intra-specific variation in the foraging habitat and trophic position of 9 large procellariiform seabirds from 6 southern breeding localities during the breeding and non-breeding periods. Isotopic ratios of each species were generally consistent among different breeding populations, despite the large geographical scale and potential variation in oceanography in surrounding waters. Both spatial and trophic segregation apparently allowed the co-existence of sympatric species in most breeding localities, except at South Georgia, where both δ13C and δ15N in chicks showed high overlap among species, probably resulting from the superabundance of alternative food resources during the summer. Low variance in stable isotope ratios among adults in several species indicated high overlap between individuals in feeding habits and trophic levels (i.e. isotopic specialist populations) during the non-breeding period. By contrast, large isotopic variances and the high within- and between-individual components of the trophic niche width suggested that grey-headed and light-mantled sooty albatrosses are generalists. Based on δ13C, the species that breed in the Southern Ocean can be categorized as residents or subtropical migrants, with the latter including oceanic and neritic subtropical migrants. Albatrosses meet the high energetic challenge of feather synthesis by foraging in different habitats, depending on the length of the non-breeding period. Annual breeders renew their plumage in productive neritic waters in ~4 mo, whereas biennially breeding species moult in less productive oceanic waters over much longer periods (~12 to 16 mo). |
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109 |
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0171-8630 |
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yes |
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Serial |
4751 |
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Author |
Cherel Y, Connan M, Jaeger A, Richard P, |
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Title |
Seabird year-round and historical feeding ecology: blood and feather δ13C and δ15N values document foraging plasticity of small sympatric petrels |
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Journal Article |
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Year |
2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
505 |
Issue |
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Pages |
267-280 |
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109 |
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0171-8630 |
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yes |
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Serial |
5040 |
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Author |
Guinet C, Picard B, Bessigneul G, Lebras Y, Dragon AC, Viviant M, Arnould JPY, Bailleul F, |
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Title |
Southern elephant seal foraging success in relation to temperature and light conditions: insight into prey distribution
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Journal Article |
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Year |
2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
499 |
Issue |
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Pages |
285-301 |
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109 |
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0171-8630 |
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yes |
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Call Number |
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Serial |
5064 |
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Author |
Thiers L, Delord K, Barbraud C, Phillips RA, Pinaud D, Weimerskirch H, |
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Title |
Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle: implication for their conservation
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Journal Article |
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Year |
2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
499 |
Issue |
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Pages |
233-248 |
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Programme |
109 |
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0171-8630 |
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yes |
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Serial |
5117 |
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Title |
Annual variation in the timing of breeding, pre‑breeding foraging areas and corticosterone levels in an Arctic population of black-legged kittiwakes
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Journal Article |
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Year |
2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
496 |
Issue |
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Pages |
233-247 |
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Abstract |
Late breeding usually occurs during years of poor environmental conditions, but the proximate mechanisms underlying this phenological pattern have been poorly documented. Here, we combined the deployment of GPS devices (from 2008 to 2010) and the monitoring of breeding parameters and baseline corticosterone levels (from 2007 to 2011) during the pre-laying period to investigate the proximate regulation of breeding date in an Arctic population of black-legged kittiwake Rissa tridactyla. The timing of breeding varied considerably during the course of the study and late breeding was associated with reduced clutch size and low breeding success at the individual level. Foraging strategies differed considerably between males and females and among years. All but one of the females tracked using GPS during the pre-laying period foraged inside the fjord, whereas tracked males foraged both inside and outside the fjord, using the deep waters of the Greenland-Svalbard ridge. Trips lasted longer and were to greater distances in 2009, the year of late breeding, compared to 2008 and 2010, highlighting a food scarcity in 2009. Corticosterone levels differed among years, and were the lowest in 2010, the year of earliest breeding. Moreover, kittiwakes exhibiting higher corticosterone levels tended to undertake longer trips when foraging outside the fjord. Breeding decision and laying date were not related to corticosterone levels at the individual level, but were positively influenced by body condition, suggesting that complex proximate mechanisms may affect timing of breeding in kittiwakes. |
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330 |
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0171-8630 |
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yes |
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Serial |
5657 |
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Author |
Schultner J, Moe B, Chastel O, Tartu S, Bech C, Kitaysky AS, |
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Title |
Corticosterone mediates carry-over effects between breeding and migration in the kittiwake Rissa tridactyla
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Journal Article |
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Year |
2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
496 |
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Pages |
125-133 |
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Abstract |
Carry-over effects, i.e. when processes in one season influence processes in the next, are believed to have important effects on behavior and fitness in animals. Despite an increasing interest in the identification of carry-over effects, there are few experimental studies of the underlying mechanisms. We investigated how a short-term experimental elevation of the stress hormone corticosterone (CORT) during breeding influences the migratory behavior of black-legged kittiwakes Rissa tridactyla. We exposed chick-rearing kittiwakes to a 3 d elevation of CORT, which is usually secreted in response to food shortages. The migratory behavior of CORT-treated kittiwakes and a control group was then tracked using geolocators. We found that CORT treatment affected subsequent autumn migration in a sex-specific manner. CORT-treated females left the breeding grounds earlier and spent a longer period at the wintering grounds than control birds and CORT-treated males. The CORT treatment did not affect the timing of spring arrival or total length of migration. Our findings indicated that physiological stress incurred during breeding can carry over to affect key parameters of migratory behavior in autumn. Identifying carry-over mechanisms, such as those described here, is important to understand how performance and fitness in animals are determined by interactions between different parts of their life cycle. |
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330 |
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0171-8630 |
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yes |
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5659 |
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Title |
Importance of ice algal production for top predators: new insights using sea-ice biomarkers
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Journal Article |
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2014 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
513 |
Issue |
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Pages |
269-275 |
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109 |
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0171-8630 |
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yes |
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5898 |
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Are bio-telemetric devices a drag? Effects of external tags on the diving behaviour of great cormorants
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Journal Article |
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Year |
2015 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
519 |
Issue |
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Pages |
239-249 |
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388 |
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0171-8630 |
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6105 |
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Author |
Guerreiro M, Phillips RA, Cherel Y, Ceia FR, Alvito P, Rosa R, Xavier JC, |
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Title |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses
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Journal Article |
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Year |
2015 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
530 |
Issue |
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Pages |
119-134 |
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109 |
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0171-8630 |
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yes |
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6168 |
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