. (2011). Whats Hiding Behind Ontogenetic 13C Variations in Mollusk Shells? New Insights from the Great Scallop (Pecten maximus)
. ESTUARIES AND COASTS, 34(2), 211–220-.
Keywords: Scallop shells, Carbon isotopes, Phytoplankton, Ontogeny, Proxy,
Programme: 1090
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. (2011). A large new species of the genus Ptilocrinus (Echinodermata, Crinoidea, Hyocrinidae) from Antarctic seamounts
. 0722-4060, 34(9), 1385–1397-.
Abstract: Ptilocrinus amezianeae n. sp. is a new species of stalked crinoid attributed to the family Hyocrinidae. Forty-five specimens were collected from seamounts north of the Ross Sea, and one specimen from the Kerguelen Plateau at depths ranging from 450 to 1,680 m. The collection from Admiralty and Scott seamounts constitutes the first example of a hyocrinid population known both from in situ photographs and from numerous collected specimens ranging from small juvenile to large adult. Variation in theca and stalk articulation characters throughout ontogeny is congruent with the molecular data and indicates that all the specimens examined belong to a single species. Tegmen and pinnule architecture, brachial arrangement, and stalk articular facets indicate that Ptilocrinus amezianeae n. sp. has close affinities with P. clarki and P. pinnatus from the northeastern Pacific and displays the most derived characters among these three species. Two cases of true arm division into two unequal branches suggest that Ptilocrinus and Calamocrinus are closely related. The picture and video transects on Admiralty seamount show a patchy distribution of living specimens with patches of mean density ca. 2.6 individuals m-2. In situ photographs also document predation by a sea urchin and a sea star on tegmen and proximal arms. The COI gene sequences analyzed in 25 specimens from Admiralty and Scott seamounts display low pairwise distances, low nucleotidic diversity, and intermediate haplotype diversity. These results, together with disarticulated ossicles and attachment disks observed on in situ photographs, indicate that the population investigated here is in decline.
Keywords: Echinodermata, Stalked crinoids, Hyocrinidae, Ptilocrinus, Antarctica, Seamount, Ross sea, Kerguelen plateau,
Programme: 1044
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Barbraud Christophe, Weimerskirch Henri, . (2012). Assessing the effect of satellite transmitters on the demography of the Wandering Albatross Diomedea exulans
. Wilson J Ornithol, 153(2), 375–383-.
Keywords: Adult survival, Breeding success, Capturerecapture, Multistate, Satellite transmitters, Wandering Albatross,
Programme: 109
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Barbraud Christophe, Weimerskirch Henri, . (2012). Estimating survival and reproduction in a quasi-biennially breeding seabird with uncertain and unobservable states
. Wilson J Ornithol, 152(2), 605–615-.
Keywords: Capturerecapture, Multievent, Multistate, Temporary emigration, Wandering Albatross,
Programme: 109
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Gauthier Gilles, Milot Emmanuel, Weimerskirch Henri, . (2012). Estimating dispersal, recruitment and survival in a biennially breeding species, the Wandering Albatross
. J. Ornithol., 152(2), 457–467-.
Keywords: Dispersal, Philopatry, Recruitment, Multistate model, Unobservable state,
Programme: 109
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Smith PJ, Steinke D, Dettai A, McMillan P, Welsford D, Stewart A, Ward RD, . (2012). DNA barcodes and species identifications in Ross Sea and Southern Ocean fishes
. Polar Biol., 35(9), 1297–1310-.
Keywords: DNA barcode, Southern Ocean, Fishes, Species identification,
Programme: 1124
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. (2012). Fine-scale spatial genetic structure in the brooding sea urchin Abatus cordatus suggests vulnerability of the Southern Ocean marine invertebrates facing global change
. POLAR BIOLOGY, 35(4), 611–623-.
Abstract: The Southern Ocean benthic communities are characterized by their levels of endemism and their diversity of invertebrate brooding species. Overall, biological processes acting within these species remain poorly understood despite their importance to understand impacts of ongoing global change. We take part in filling this gap by studying the genetic structure over different spatial scales (from centimeters to tens of kilometers) in Abatus cordatus, an endemic and brooding sea urchin from the Kerguelen Islands. We developed three microsatellites and two exon-primed intron crossing markers and conducted a two-scale sampling scheme (from individuals to patches) within two dense localities of Abatus cordatus. Between patches, all pairwise comparisons, covering distances from few meters (between patches within locality) to 25 km (between localities), revealed significant genetic differentiation, a higher proportion of the molecular variance being explained by the comparisons between localities than within localities, in agreement with an isolation by distance model. Within patches, we found no significant correlation between individual pairwise spatial and genetic distances, except for the most polymorphic locus in the patch where the largest range of geographical distances had been analyzed. This study provides an estimation of the dispersal capacities of Abatus cordatus and highlights its low recolonization ability. Similar low recolonization capacities are thus expected in other Antarctic and Subantarctic brooding invertebrate species and suggest a high vulnerability of these species facing global change.
Keywords: Abatus cordatus, Microsatellites, Introns, Brooding, Genetic structure, Heterozygote deficiency,
Programme: 1044
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Greenslade Penelope, Vernon P, Smith D, . (2012). Ecology of Heard Island Diptera
. POLAR BIOLOGY, 35(6), 841–850-.
Keywords: Anatalanta aptera, Calycopteryx moseleyi, Amalopteryx maritima, Fluctuating asymmetry, Climate change, Invasive species,
Programme: 136
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Lalouette L, Williams CM, Cottin M, Sinclair BJ, Renault D, . (2012). Thermal biology of the alien ground beetle Merizodus soledadinus introduced to the Kerguelen Islands
. POLAR BIOLOGY, 35(4), 509–517-.
Keywords: Sub-Antarctic island, Insect, Critical thermal limit, Survival, Fluctuating thermal regime, Metabolic rate,
Programme: 136
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. (2013). The complete history of salmonid introductions in the Kerguelen Islands, Southern Ocean
.36(4), 457–475-.
Keywords: Introductions, Colonization, Salmo, Oncorhynchus, Salvelinus, Kerguelen Islands,
Programme: 1041
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