| Records |
| Author |
Colin Southwell, Louise Emmerson, Akinori Takahashi, Akiko Kato, Christophe Barbraud, Karine Delord, Henri Weimerskirch |
| Title |
Recent studies overestimate colonization and extinction events for Adelie Penguin breeding colonies |
Type |
Journal |
| Year |
2017 |
Publication |
The Auk |
Abbreviated Journal  |
|
| Volume |
134 |
Issue |
1 |
Pages |
39-50 |
| Keywords |
|
| Abstract |
Modeling metapopulation dynamics is potentially a useful and powerful tool for ecologists and conservation biologists. However, the key processes driving metapopulation dynamics are colonization and extinction events, which are notoriously difficult to study. A recent global assessment of Adelie Penguin (Pygoscelis adeliae) breeding populations reported multiple potential colonization and extinction events from occupancy observations using recent high-resolution satellite imagery and examination of historical occupancy literature, but emphasized that the events should be confirmed with direct observations. We evaluated these conclusions by developing a comprehensive database of direct observations of Adelie Penguin breeding site occupancy across East Antarctica. The database allowed 16 of 19 proposed colonization and extinction events in this region to be evaluated using direct observations that were concurrent in space and time (same breeding season) with observations from satellite imagery. We concluded that none of the 16 proposed colonization and extinction events had occurred. One true extinction event may have been correctly identified from satellite imagery, but a conclusive evaluation was not possible because the direct and satellite observations were not concurrent in time. The evaluation identified several sources of error in observations from satellite imagery, including errors of omission through failure to detect small colonies and errors of commission through misidentification of other biological and physical features as Adelie Penguin guano. The occupancy database corrected issues of poor precision and accuracy in locations of historical occupancy data. Our results improve understanding of key parameters for Adelie Penguin metapopulation dynamics and facilitate improved interpretation of satellite imagery in the future. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0004-8038 |
ISBN |
0004-8038 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6650 |
| Permanent link to this record |
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| Author |
Laurie Thiers, Karine Delord, Charles-André Bost, Christophe Guinet, Henri Weimerskirch |
| Title |
Important marine sectors for the top predator community around Kerguelen Archipelago |
Type |
Journal |
| Year |
2017 |
Publication |
Polar Biology |
Abbreviated Journal |
|
| Volume |
40 |
Issue |
2 |
Pages |
365-378 |
| Keywords |
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| Abstract |
The French Kerguelen Archipelago represents an important breeding place for many species of marine top predators within the Southern Ocean, making the plateau hosting the archipelago and surrounding waters (CCAMLR area 58.5) a crucial area to design conservation measures. In this study, available tracking data from nine species of seabirds and marine mammals breeding at Kerguelen were analysed to define potential boundaries for a Marine Protected Area. Maps of time spent per square of each species were first used to describe high-use areas within the Kerguelen Plateau. Habitat models were then developed for four species (Black-browed albatross, Wandering albatross, King penguin and Antarctic fur seal) chosen on the basis of their contrasted foraging ecology and diet to represent the top predator community. Predictive models were then applied to the main colonies of the four species for which no tracking data were available to illustrate the most important feeding areas at the scale of the entire study zone. An area delineated by the central part of the plateau and its slopes appeared to be of great importance for the top predators’ community and would appropriately complete the limits of the existing Australian marine reserve of Heard and McDonald Islands. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0722-4060, 1432-2056 |
ISBN |
0722-4060, 1432-2056 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6651 |
| Permanent link to this record |
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| Author |
Youngflesh Casey, Jenouvrier Stephanie, Li Yun, Ji Rubao, Ainley David G., Ballard Grant, Barbraud Christophe, Delord Karine, Dugger Katie M., Emmerson Louise M., Fraser William R., Hinke Jefferson T., Lyver Phil O’B., Olmastroni Silvia, Southwell Colin J., Trivelpiece Susan G., Trivelpiece Wayne Z., Lynch Heather J. |
| Title |
Circumpolar analysis of the Adélie Penguin reveals the importance of environmental variability in phenological mismatch |
Type |
Journal |
| Year |
2017 |
Publication |
Ecology |
Abbreviated Journal |
|
| Volume |
98 |
Issue |
4 |
Pages |
940-951 |
| Keywords |
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| Abstract |
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0012-9658 |
ISBN |
0012-9658 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6652 |
| Permanent link to this record |
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| Author |
PICARD B. |
| Title |
Les éléphants de mer auxiliaires d’étude à la description de l’océanographie physique et à l’écologie marine |
Type |
Thesis |
| Year |
2017 |
Publication |
|
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
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Medium |
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| Area |
|
Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6653 |
| Permanent link to this record |
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| Author |
C. Barbraud, J. Vasseur, K. Delord |
| Title |
Using distance sampling and occupancy rate to estimate abundance of breeding pairs of Wilson’s Storm Petrel (Oceanites oceanicus) in Antarctica |
Type |
Journal |
| Year |
2017 |
Publication |
Polar Biology |
Abbreviated Journal |
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| Volume |
41 |
Issue |
2 |
Pages |
313-322 |
| Keywords |
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| Abstract |
Reliable population estimates are needed for the conservation management of seabird populations. Failing to account for detection probability in surveys often leads to underestimate population size and, if detection probability varies among surveys, to bias the estimated trends. This is particularly relevant for storm petrels, which are widespread small burrow- or cavity-nesting seabirds, which have low detection probabilities on land and at sea and whose population status and trends are the least known among seabirds. Here, we used the distance sampling method to estimate detection probability and breeding population size of the cavity-nesting Wilson’s Storm Petrel (Oceanites oceanicus) in the Pointe Géologie archipelago, East Antarctica. Detection probability was 0.353 ± 0.053 and the average density of active nests was 45.53 ± 15.63 nests/ha. The proportion of nests occupied by breeders was estimated using an endoscope on a sample of nests and was 0.455 ± 0.053. The breeding population was estimated to be 793 (95% CI 344–1359) breeding pairs in January 2016. We advocate the distance sampling method as a robust approach to estimate abundance of breeding Wilson’s Storm Petrels in Antarctica. Comparison with an earlier survey suggests that the population has decreased over the past 30 years, possibly partly due to a reduction in nesting habitat following the extension of the surface area occupied by penguin colonies. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0722-4060, 1432-2056 |
ISBN |
0722-4060, 1432-2056 |
Medium |
|
| Area |
|
Expedition |
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Conference |
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| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
6654 |
| Permanent link to this record |
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| |
| Author |
Nolwenn Béhagle, Cédric Cotté, Anne Lebourges-Dhaussy, Gildas Roudaut, Guy Duhamel, Patrice Brehmer, Erwan Josse, Yves Cherel |
| Title |
Acoustic distribution of discriminated micronektonic organisms from a bi-frequency processing: The case study of eastern Kerguelen oceanic waters |
Type |
Journal |
| Year |
2017 |
Publication |
Progress in Oceanography |
Abbreviated Journal |
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| Volume |
156 |
Issue |
|
Pages |
276-289 |
| Keywords |
Acoustics Euphausiid Kerguelen Myctophid Southern Ocean |
| Abstract |
Despite its ecological importance, micronekton remains one of the least investigated components of the open-ocean ecosystems. Our main goal was to characterize micronektonic organisms using bi-frequency acoustic data (38 and 120kHz) by calibrating an algorithm tool that discriminates groups of scatterers in the top 300m of the productive oceanic zone east of Kerguelen Islands (Indian sector of the Southern Ocean). The bi-frequency algorithm was calibrated from acoustic properties of mono-specific biological samples collected with trawls, thus allowing to discriminate three acoustic groups of micronekton: (i) “gas-bearing” (ΔSv,120-38<−1dB), (ii) “fluid-like” (ΔSv,120-38>2dB), and (iii) “undetermined” scatterers (−1<ΔSv,120-38<2dB). The three groups likely correspond biologically to gas-filled swimbladder fish (myctophids), crustaceans (euphausiids and hyperiid amphipods), and other marine organisms potentially present in these waters and containing either lipid-filled or no inclusion (e.g. other myctophids), respectively. The Nautical Area Scattering Coefficient (NASC) was used (echo-integration cells of 10m long and 1m deep) between 30 and 300m depth as a proxy of relative biomass of acoustic targets. The distribution of NASC values showed a complex pattern according to: (i) the three acoustically-defined groups, (ii) the type of structures (patch vs. layers) and (iii) the timing of the day (day/night cycle). NASC values were higher at night than during the day. A large proportion of scatterers occurred in layers while patches, that mainly encompass gas-bearing organisms, are especially observed during daytime. This method provided an essential descriptive baseline of the spatial distribution of micronekton and a relevant approach to (i) link micronektonic group to physical parameters to define their habitats, (ii) investigate trophic interactions by combining active acoustic and top predator satellite tracking, and (iii) study the functioning of the pelagic ecosystems at various spatio-temporal scales. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0079-6611 |
ISBN |
0079-6611 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6655 |
| Permanent link to this record |
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| Author |
Caio V. Z. Cipro, Y. Cherel, P. Bocher, F. Caurant, P. Miramand, P. Bustamante |
| Title |
Trace elements in invertebrates and fish from Kerguelen waters, southern Indian Ocean |
Type |
Journal |
| Year |
2017 |
Publication |
Polar Biology |
Abbreviated Journal |
|
| Volume |
41 |
Issue |
1 |
Pages |
175-191 |
| Keywords |
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| Abstract |
Given the lack of background data on essential and non-essential trace elements in invertebrates and fish known to be the predominant prey of marine mammals and seabirds breeding at the Kerguelen Islands, this study intends to provide these results of great influence for predators in higher trophic levels. To this end, plankton organisms (9 species/4 phyla), mollusks (2 bivalves and 2 squid species) and fishes (8 benthic and 10 pelagic species) from Kerguelen waters were analysed for cadmium (Cd), copper (Cu), mercury (Hg) and zinc (Zn). Individual concentrations of non-essential elements (particularly Cd) showed larger variation in comparison with essential ones likely due to their homeostasis. Thus Cd ranged over 4 orders of magnitude; however, Hg ranged only 1, without significant correlation to trophic level. Instead, ecological parameters (benthic/mesopelagic habitat and feeding ecology) showed a more important influence on the results. Concerning seashore organisms, bivalves collected inside the Gulf of Morbihan had higher Cd concentrations compared to those from the Kerguelen shelf, suggesting a local source of Cd, such as runoff water from bird colonies. Comparison with the literature showed metal concentrations in invertebrates and fishes from Kerguelen Islands somewhat lower than those in the Antarctic area, with Hg prevailing in benthic species and Cd in pelagic ones. In contrast to Hg, Cd values of squids, jellyfish and the amphipod Themisto gaudichaudii were significantly higher than all other species. Finally, top predators foraging in this area that can be subject to potentially high Hg and Cd exposure through their diet at Kerguelen are reviewed. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0722-4060, 1432-2056 |
ISBN |
0722-4060, 1432-2056 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6656 |
| Permanent link to this record |
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| Author |
Julien Collet, Samantha C. Patrick, Henri Weimerskirch |
| Title |
A comparative analysis of the behavioral response to fishing boats in two albatross species |
Type |
Journal |
| Year |
2017 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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| Volume |
28 |
Issue |
5 |
Pages |
1337-1347 |
| Keywords |
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| Abstract |
Anthropogenic food resources have significantly modified the foraging behavior of many animal species. They enhance large multi-specific aggregations of individuals, with strong ecological consequences. It is challenging to predict how individuals or species can differ in their reaction to these resources. For instance, there are wide variations in seabird species abundance behind fishing boats, and individual variations in interaction rates. Whether this is reflecting variations in fine-scale encounter rates or rather variations in attraction strength is poorly quantified. Here we compare the response of Wandering (WA) and Black-browed (BBA) albatrosses to fishing boats operating in sub-Antarctic waters. We use GPS tracking data from both birds and boats (Vessel Monitoring System). Attraction distances were similar between the 2 species (up to 30 km). BBA foraged further from fishing grounds and encountered boats less frequently than WA, but once they encountered a boat BBA were more strongly attracted (80% vs. 60% chance) and had a higher level of active interaction, compared to WA. Furthermore, in the absence of boats, BBA were rarely observed foraging over the habitat where the fisheries mainly operate, in contrast with WA. We thus report qualitative and quantitative differences in the response of these 2 species to the same fishing fleet. WA, the larger, more dominant and more generalist species was unexpectedly less attracted to fishing vessels. Comparing our results with previously published studies, we suggest that energetic requirements of individuals may be a crucial predictor for assessing risks of interactions with anthropogenic food resources. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1045-2249 |
ISBN |
1045-2249 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6657 |
| Permanent link to this record |
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| Author |
Cox Sam L., Orgeret Florian, Gesta Mathieu, Rodde Charles, Heizer Isaac, Weimerskirch Henri, Guinet Christophe, O'Hara Robert B. |
| Title |
Processing of acceleration and dive data on‐board satellite relay tags to investigate diving and foraging behaviour in free‐ranging marine predators |
Type |
Journal |
| Year |
2017 |
Publication |
Methods in Ecology and Evolution |
Abbreviated Journal |
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| Volume |
9 |
Issue |
1 |
Pages |
64-77 |
| Keywords |
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| Abstract |
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2041-210X |
ISBN |
2041-210X |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6658 |
| Permanent link to this record |
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| Author |
Grissac Sophie, Bartumeus Frederic, Cox Sam L., Weimerskirch Henri |
| Title |
Early‐life foraging: Behavioral responses of newly fledged albatrosses to environmental conditions |
Type |
Journal |
| Year |
2017 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
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| Volume |
7 |
Issue |
17 |
Pages |
6766-6778 |
| Keywords |
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| Abstract |
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2045-7758 |
ISBN |
2045-7758 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6659 |
| Permanent link to this record |
