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Title |
Marine Bioluminescence: Measurement by a Classical Light Sensor and Related Foraging Behavior of a Deep Diving Predator |
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Journal |
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Year |
2017 |
Publication |
Photochemistry and Photobiology |
Abbreviated Journal  |
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Volume |
93 |
Issue |
5 |
Pages |
1312-1319 |
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109 |
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ISSN |
1751-1097 |
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1751-1097 |
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yes |
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Serial |
7183 |
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Author |
H. Weimerskirch, D. P. Filippi, J. Collet, S. M. Waugh, S. C. Patrick |
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Title |
Use of radar detectors to track attendance of albatrosses at fishing vessels |
Type |
Journal |
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Year |
2017 |
Publication |
Conservation Biology |
Abbreviated Journal |
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Volume |
32 |
Issue |
1 |
Pages |
240-245 |
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Abstract |
Despite international waters covering over 60% of the world's oceans, understanding of how fisheries in these regions shape ecosystem processes is surprisingly poor. Seabirds forage at fishing vessels, which has potentially deleterious effects for their population, but the extent of overlap and behavior in relation to ships is poorly known. Using novel biologging devices, which detect radar emissions and record the position of boats and seabirds, we measured the true extent of the overlap between seabirds and fishing vessels and generated estimates of the intensity of fishing and distribution of vessels in international waters. During breeding, wandering albatrosses (Diomedea exulans) from the Crozet Islands patrolled an area of over 10 million km2 at distances up to 2500 km from the colony. Up to 79.5% of loggers attached to birds detected vessels. The extent of overlap between albatrosses and fisheries has widespread implications for bycatch risk in seabirds and reveals the areas of intense fishing throughout the ocean. We suggest that seabirds equipped with radar detectors are excellent monitors of the presence of vessels in the Southern Ocean and offer a new way to monitor the presence of illegal fisheries and to better understand the impact of fisheries on seabirds. |
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109 |
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ISSN |
1523-1739 |
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1523-1739 |
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yes |
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7184 |
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Year |
2017 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
98 |
Issue |
4 |
Pages |
940-951 |
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Keywords |
Anna Karenina Principle Antarctica asynchrony Bayesian hierarchical model climate change phenology Pygoscelis adeliae quantile regression |
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Programme |
109 |
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ISSN |
1939-9170 |
ISBN |
1939-9170 |
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yes |
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7185 |
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Author |
A. B. Makhado, R. J. M. Crawford, M. P. Dias, B. M. Dyer, T. Lamont, P. Pistorius, P. G. Ryan, L. Upfold, H. Weimerskirch, R. R. Reisinger |
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Title |
Foraging behaviour and habitat use by Indian Yellow-nosed Albatrosses (Thalassarche carteri) breeding at Prince Edward Island |
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Journal |
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Year |
2018 |
Publication |
Emu – Austral Ornithology |
Abbreviated Journal |
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Volume |
118 |
Issue |
4 |
Pages |
353-362 |
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Keywords |
Environmental parameters Feeding habitat characteristics foraging ground partitioning seabirds state-space model |
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Abstract |
Demographic parameters of wild animals are often closely associated with their foraging distribution and behaviour, and understanding these attributes can assist in identifying causes of population changes. The Indian Yellow-nosed Albatross (Thalassarche carteri) is endangered but little information is available on its at-sea distribution and behaviour. It breeds only in French (Iles Amsterdam, St Paul, Kerguelen and Crozet) and South African (Prince Edward Island, PEI) territories in the south-west Indian Ocean, with PEI supporting about 20% of the global population. This study aimed to investigate the at-sea distributions of adult Indian Yellow-nosed Albatrosses provisioning chicks at PEI and to compare them with distributions of Yellow-nosed Albatrosses breeding at other localities. Using satellite transmitters, we identified two areas that were particularly favoured for foraging. Parents whose partners were brooding small chicks frequently moved north-east of PEI to shallow, productive waters where cold, nutrient-rich water upwells and results in enhanced levels of chlorophyll-a. By contrast, parents with older chicks that could be left unattended often foraged along the Agulhas Bank where eddies and shear forces promote vertical mixing. The at-sea distribution of birds breeding at PEI was located between those reported for Indian Yellow-nosed Albatrosses breeding at Ile Amsterdam and Atlantic Yellow-nosed Albatrosses (T. chlororhynchos) breeding at Gough Island, so that birds from these localities may face different threats at sea. Our study is the first to highlight key feeding areas for Indian Yellow-nosed Albatrosses from PEI and to demonstrate partitioning of foraging grounds by Yellow-nosed Albatrosses from different localities. |
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109 |
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ISSN |
0158-4197 |
ISBN |
0158-4197 |
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Approved |
yes |
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Call Number |
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Serial |
7186 |
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Author |
Henri Weimerskirch |
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Title |
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Journal |
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Year |
2018 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
87 |
Issue |
4 |
Pages |
945-955 |
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Keywords |
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Abstract |
Population dynamics and foraging ecology are two fields of the population ecology that are generally studied separately. Yet, foraging determines allocation processes and therefore demography. Studies on wandering albatrosses Diomedea exulans over the past 50 years have contributed to better understand the links between population dynamics and foraging ecology. This article reviews how these two facets of population ecology have been combined to better understand ecological processes, but also have contributed fundamentally for the conservation of this long-lived threatened species. Wandering albatross research has combined a 50-year long-term study of marked individuals with two decades of tracking studies that have been initiated on this species, favoured by its large size and tameness. At all stages of their life history, the body mass of individuals plays a central role in allocation processes, in particular in influencing adult and juvenile survival, decisions to recruit into the population or to invest into provisioning the offspring or into maintenance. Strong age-related variations in demographic parameters are observed and are linked to age-related differences in foraging distribution and efficiency. Marked sex-specific differences in foraging distribution, foraging efficiency and changes in mass over lifetime are directly related to the strong sex-specific investment in breeding and survival trajectories of the two sexes, with body mass playing a pivotal role especially in males. Long-term study has allowed determining the sex-specific and age-specific demographic causes of population decline, and the tracking studies have been able to derive where and how these impacts occur, in particular the role of long-line fisheries. |
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109 |
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ISSN |
1365-2656 |
ISBN |
1365-2656 |
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yes |
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Serial |
7187 |
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Author |
Lisa A. Sztukowski, Peter A. Cotton, Henri Weimerskirch, David R. Thompson, Leigh G. Torres, Paul M. Sagar, Antony M. Knights, Annette L. Fayet, Stephen C. Votier |
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Title |
Sex differences in individual foraging site fidelity of Campbell albatross |
Type |
Journal |
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Year |
2018 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
601 |
Issue |
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Pages |
227-238 |
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Keywords |
Foraging effort GPS tracking Repeatability Route fidelity Sex effects |
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Abstract |
Inter-individual variation in behavioural traits has important implications for evolutionary and ecological processes. Site fidelity, where individuals consistently use the same foraging site, is common among marine predators. Sex differences in foraging are also well studied in marine vertebrates, but the extent to which consistent inter-individual differences in foraging vary between the sexes is poorly known. Here we quantified the effects of sex on individual foraging site fidelity (IFSF), both within and between years, in chick-brooding Campbell albatross Thalassarche impavida. Using bird-borne global positioning system loggers, we calculated route fidelity (nearest-neighbour distance), repeatability of site fidelity (terminal latitude and longitude), and foraging effort (total distance travelled and trip duration) during 2 to 10 repeat trips. Overall, Campbell albatrosses showed a high degree of site fidelity. Birds travelled to similar sites not only within the same year, but also between 2 consecutive years, suggesting that the within-year consistency is not simply in response to short-term patches of food. Moreover, within the same year, we found differences in terms of IFSF between the sexes. Females that foraged closer to the colony in neritic and shelf waters were more likely to follow similar routes on repeated foraging trips and were more consistent in their foraging effort than males. Males that foraged further offshore in pelagic waters had more repeatable foraging longitudes than females. Our study provides further evidence of the importance of IFSF among marine vertebrates. However, it also reveals that the strength of such specialisations may vary with sex. |
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109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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yes |
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Serial |
7188 |
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Title |
Linking oceanographic conditions, migratory schedules and foraging behaviour during the non-breeding season to reproductive performance in a long-lived seabird |
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Journal |
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Year |
2018 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
32 |
Issue |
8 |
Pages |
2040-2053 |
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Keywords |
carry-over effect migration phenology protandry reproductive performance sea surface temperature sex Thalassarche melanophris |
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Abstract |
Studies of the mechanisms underlying climate-induced population changes are critically needed to better understand and accurately predict population responses to climate change. Long-lived migratory species might be particularly vulnerable to climate change as they are constrained by different climate conditions and energetic requirements during the breeding and non-breeding seasons. Yet, most studies primarily focus on the breeding season of these species life cycle. Environmental conditions experienced in the non-breeding season may have downstream effects on the other stages of the annual life cycle. Not investigating such effects may potentially lead to erroneous inferences about population dynamics. Combining demographic and tracking data collected between 2006 and 2013 at Kerguelen Island on a long-lived migratory seabird, the Black-Browed Albatross (Thalassarche melanophris), we investigated the links between sea surface temperature during the non-breeding season and behavioural and phenological traits (at-sea behaviour and migratory schedules) while accounting for different responses between birds of different sex and reproductive status (previously failed or successful breeders). We then explored whether variation in the foraging behaviour and timing of spring migration influenced subsequent reproductive performance. Our results showed that foraging activity and migratory schedules varied by both sex and reproductive status suggesting different energetic requirements and constraints among individuals. Higher sea surface temperatures during late winter, assumed to reflect poor winter conditions, were associated with an earlier departure from the wintering grounds and an extended pre-breeding period. However, an earlier spring migration and an earlier return to Kerguelen grounds were associated with a lower breeding success. Our results highlighted that behaviour during some periods of the non-breeding season, particularly towards the end of the wintering period and the pre-breeding period, had a significant effect on the subsequent reproductive success. Therefore, caution needs to be given to all stages of the annual cycle when predicting the influence of climate on population dynamics. A plain language summary is available for this article. |
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109 |
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ISSN |
1365-2435 |
ISBN |
1365-2435 |
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yes |
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Serial |
7189 |
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Title |
From early life to senescence: individual heterogeneity in a long-lived seabird |
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Year |
2018 |
Publication |
Ecological Monographs |
Abbreviated Journal |
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Volume |
88 |
Issue |
1 |
Pages |
60-73 |
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109 |
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ISSN |
1557-7015 |
ISBN |
1557-7015 |
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yes |
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Call Number |
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Serial |
7190 |
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Author |
Johannes H. Fischer, Igor Debski, Colin M. Miskelly, Charles A. Bost, Aymeric Fromant, Alan J. D. Tennyson, Jake Tessler, Rosalind Cole, Johanna H. Hiscock, Graeme A. Taylor, Heiko U. Wittmer |
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Title |
Analyses of phenotypic differentiations among South Georgian Diving Petrel (Pelecanoides georgicus) populations reveal an undescribed and highly endangered species from New Zealand |
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Journal |
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Year |
2018 |
Publication |
PLOS ONE |
Abbreviated Journal |
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Volume |
13 |
Issue |
6 |
Pages |
e0197766 |
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Keywords |
Biometrics Birds Ears Islands New Zealand Principal component analysis Species delimitation Taxonomy |
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Abstract |
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Programme |
394 |
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ISSN |
1932-6203 |
ISBN |
1932-6203 |
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yes |
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Call Number |
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Serial |
7192 |
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Title |
Comparative population genomics reveals key barriers to dispersal in Southern Ocean penguins |
Type |
Journal |
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Year |
2018 |
Publication |
Molecular Ecology |
Abbreviated Journal |
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Volume |
27 |
Issue |
23 |
Pages |
4680-4697 |
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Keywords |
Aptenodytes genetic differentiation Polar Front population genomics Pygoscelis RAD-Seq |
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Abstract |
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Programme |
394 |
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ISSN |
1365-294X |
ISBN |
1365-294X |
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yes |
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Call Number |
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Serial |
7193 |
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| Permanent link to this record |
