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Title |
Exploring the interplay between nest vocalizations and foraging behaviour in breeding birds |
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Journal |
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Year |
2021 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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Volume |
180 |
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Pages |
375-391 |
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Keywords |
bird communication foraging behaviour reproductive partner vocalization |
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1091 |
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0003-3472 |
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yes |
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8760 |
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Title |
International Geomagnetic Reference Field: the thirteenth generation |
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Journal |
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Year |
2021 |
Publication |
Earth, Planets and Space |
Abbreviated Journal |
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Volume |
73 |
Issue |
1 |
Pages |
49 |
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Keywords |
Geomagnetism IGRF Magnetic field modeling |
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Abstract |
In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted the thirteenth generation of the International Geomagnetic Reference Field (IGRF). This IGRF updates the previous generation with a definitive main field model for epoch 2015.0, a main field model for epoch 2020.0, and a predictive linear secular variation for 2020.0 to 2025.0. This letter provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020.0 to 2025.0 time period. |
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139 |
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ISSN |
1880-5981 |
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yes |
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Call Number |
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Serial |
8085 |
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Title |
Evaluation of candidate models for the 13th generation International Geomagnetic Reference Field |
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Journal |
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Year |
2021 |
Publication |
Earth, Planets and Space |
Abbreviated Journal |
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Volume |
73 |
Issue |
1 |
Pages |
48 |
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Keywords |
Geomagnetism IGRF Magnetic field modeling |
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Programme |
139 |
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1880-5981 |
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yes |
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7937 |
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Title |
Fine-scale spatial segregation in a pelagic seabird driven by differential use of tidewater glacier fronts |
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Journal |
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Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
22109 |
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Keywords |
Behavioural ecology Biogeography |
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Abstract |
In colonially breeding marine predators, individual movements and colonial segregation are influenced by seascape characteristics. Tidewater glacier fronts are important features of the Arctic seascape and are often described as foraging hotspots. Albeit their documented importance for wildlife, little is known about their structuring effect on Arctic predator movements and space use. In this study, we tested the hypothesis that tidewater glacier fronts can influence marine bird foraging patterns and drive spatial segregation among adjacent colonies. We analysed movements of black-legged kittiwakes (Rissa tridactyla) in a glacial fjord by tracking breeding individuals from five colonies. Although breeding kittiwakes were observed to travel up to ca. 280 km from the colony, individuals were more likely to use glacier fronts located closer to their colony and rarely used glacier fronts located farther away than 18 km. Such variation in the use of glacier fronts created fine-scale spatial segregation among the four closest (ca. 7 km distance on average) kittiwake colonies. Overall, our results support the hypothesis that spatially predictable foraging patches like glacier fronts can have strong structuring effects on predator movements and can modulate the magnitude of intercolonial spatial segregation in central-place foragers. |
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330 |
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ISSN |
2045-2322 |
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yes |
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Serial |
8309 |
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Title |
Call rate, fundamental frequency, and syntax determine male-call attractiveness in blue petrels Halobaena caerulea |
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Journal |
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Year |
2021 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
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Volume |
75 |
Issue |
3 |
Pages |
55 |
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Abstract |
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Programme |
354 |
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Edition |
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ISSN |
1432-0762 |
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yes |
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Serial |
7055 |
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Title |
A Bad Start in Life? Maternal Transfer of Legacy and Emerging Poly- and Perfluoroalkyl Substances to Eggs in an Arctic Seabird |
Type |
Journal |
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Year |
2021 |
Publication |
Environmental Science & Technology |
Abbreviated Journal |
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Volume |
56 |
Issue |
10 |
Pages |
6091-6102 |
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Keywords |
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Abstract |
In birds, maternal transfer is a major exposure route for several contaminants, including poly- and perfluoroalkyl substances (PFAS). Little is known, however, about the extent of the transfer of the different PFAS compounds to the eggs, especially for alternative fluorinated compounds. In the present study, we measured legacy and emerging PFAS, including Gen-X, ADONA, and F-53B, in the plasma of prelaying black-legged kittiwake females breeding in Svalbard and the yolk of their eggs. We aimed to (1) describe the contaminant levels and patterns in both females and eggs, and (2) investigate the maternal transfer, that is, biological variables and the relationship between the females and their eggs for each compound. Contamination of both females and eggs were dominated by linPFOS then PFUnA or PFTriA. We notably found 7:3 fluorotelomer carboxylic acid?a precursor of long-chain carboxylates?in 84% of the egg yolks, and provide the first documented finding of ADONA in wildlife. Emerging compounds were all below the detection limit in female plasma. There was a linear association between females and eggs for most of the PFAS. Analyses of maternal transfer ratios in females and eggs suggest that the transfer is increasing with PFAS carbon chain length, therefore the longest chain perfluoroalkyl carboxylic acids (PFCAs) were preferentially transferred to the eggs. The mean ?PFAS in the second-laid eggs was 73% of that in the first-laid eggs. Additional effort on assessing the outcome of maternal transfers on avian development physiology is essential, especially for PFCAs and emerging fluorinated compounds which are under-represented in experimental studies. |
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330 |
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ISSN |
0013-936X |
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Approved |
yes |
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Call Number |
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Serial |
8315 |
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Type |
Journal |
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Year |
2021 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
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Volume |
131 |
Issue |
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Pages |
104962 |
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Keywords |
Corticosterone stress response Defensive behavior Offspring stress sensitivity Parental presence |
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Abstract |
In altricial species, parents brood their chicks constantly before leaving them unattended sometimes for extended periods when they become thermally independent. During this second phase, there is sometimes important inter-individual differences in parental attendance and the fitness costs and benefits of parental strategies have previously been extensively investigated. However, the impact of parental presence on offspring behaviors and stress physiology has been overlooked. Here, we examined the influence of parental presence on offspring hormonal and behavioral stress sensitivities in snow petrel chicks. We demonstrated for the first time in a wild bird species that attended chicks had lower stress-induced corticosterone levels and a lower probability to show defensive behavior compared to the alone chicks. This reduced stress sensitivity is certainly explained by the well-known link between corticosterone and nutritional status, and by the recent delivery of meals to the attended chicks and the improvement of their nutritional status. It may also be explained by the parental protection against predators or inclement weather, or/and by the psychosocial comfort of parental presence for the offspring. Overall, these results suggest that the presence of a parent in the nest reduces offspring stress sensitivity in wild birds. Further studies would now be required to disentangle the impact of nutritional status and parental presence on stress sensitivity and to better understand the potential impact of parental presence and circulating corticosterone levels on growth and cognitive development in wild birds. |
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109 |
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ISSN |
0018-506X |
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yes |
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Call Number |
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Serial |
7941 |
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Title |
Landfast ice: a major driver of reproductive success in a polar seabird |
Type |
Journal |
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Year |
2021 |
Publication |
Biology Letters |
Abbreviated Journal |
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Volume |
17 |
Issue |
6 |
Pages |
20210097 |
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Keywords |
breeding success climate window analysis emperor penguin nonlinear effect sea ice |
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Abstract |
In a fast-changing world, polar ecosystems are threatened by climate variability. Understanding the roles of fine-scale processes, and linear and nonlinear effects of climate factors on the demography of polar species is crucial for anticipating the future state of these fragile ecosystems. While the effects of sea ice on polar marine top predators are increasingly being studied, little is known about the impacts of landfast ice (LFI) on this species community. Based on a unique 39-year time series of satellite imagery and in situ meteorological conditions and on the world's longest dataset of emperor penguin (Aptenodytes forsteri) breeding parameters, we?studied the effects of fine-scale variability of LFI and weather conditions on?this?species' reproductive success. We found that longer distances to the LFI edge (i.e. foraging areas) negatively affected the overall breeding success but also the fledging success. Climate window analyses suggested that chick mortality was particularly sensitive to LFI variability between August and November. Snowfall in May also affected hatching success. Given the sensitivity of LFI to storms and changes in wind direction, important future repercussions on the breeding habitat of emperor penguins are to be expected in the context of climate change. |
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109 |
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yes |
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Serial |
8040 |
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Title |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
Type |
Journal |
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Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
11917 |
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Keywords |
Animal migration Behavioural ecology Ecology Stable isotope analysis |
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Abstract |
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Programme |
1041 |
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2045-2322 |
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2045-2322 |
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yes |
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Serial |
8180 |
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Author |
Christophe Barbraud, Karine Delord |
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Title |
Selection against immigrants in wild seabird populations |
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Journal |
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Year |
2021 |
Publication |
Ecology Letters |
Abbreviated Journal |
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Volume |
24 |
Issue |
1 |
Pages |
84-93 |
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Keywords |
Dispersal fitness immigrant seabirds sex-biased dispersal |
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109 |
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ISSN |
1461-0248 |
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yes |
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Call Number |
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Serial |
8418 |
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