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Marina Renedo, Paco Bustamante, Yves Cherel, Zoyne Pedrero, Emmanuel Tessier, David Amouroux |
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2020 |
Publication |
Science of The Total Environment |
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Volume |
742 |
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Pages |
140499 |
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Keywords |
Biogeochemistry Latitude Methylmercury Penguins Skuas |
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109 |
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0048-9697 |
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8081 |
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Author |
Petra Quillfeldt, Henri Weimerskirch, Karine Delord, Yves Cherel |
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Title |
Niche switching and leapfrog foraging: movement ecology of sympatric petrels during the early breeding season |
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Journal |
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Year |
2020 |
Publication |
Movement Ecology |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
Pages |
23 |
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Keywords |
Breeding schedule Central-place forager Foraging ecology Tracking |
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Abstract |
The timing of events in the early part of the breeding season is crucially important for successful reproduction. Long-lived animals that migrate large distances independently of each other meet at the breeding sites to re-establish their pair bonds and coordinate their breeding duties with their partners. |
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109 |
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ISSN |
2051-3933 |
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yes |
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8080 |
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Author |
Alexandra Lavrillier |
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Journal |
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Year |
2020 |
Publication |
Arctic Anthropology |
Abbreviated Journal |
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Volume |
57 |
Issue |
1 |
Pages |
72-99 |
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1127 |
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0066-6939, 1933-8139 |
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8079 |
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Title |
Coordination in parental effort decreases with age in a long-lived seabird |
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2020 |
Publication |
Oikos |
Abbreviated Journal |
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Volume |
129 |
Issue |
12 |
Pages |
1763-1772 |
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Keywords |
albatrosses biologging foraging bout incubation shift duration life history tradeoffs parental care sexual conflict |
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Abstract |
Biparental care is widespread in avian species. Individuals may match the contribution of their partner, resulting in equal parental effort, or may exploit their partner, to minimise their own investment. These two hypotheses have received much theoretical and empirical attention in short-lived species, that change mates between seasons. However, in species with persistent pair bonds, where divorce is rare and costly, selective pressures are different, as partners share the value of future reproduction. In such species, coordination has been suggested to be adaptive and to increase early in life, as a consequence of the importance of mate familiarity. However, as birds age, an increase in re-pairing probability occurs in parallel to a decline in their survival probability. At the point when partners no longer share future reproductive success, exploitation of a partner could become adaptive, reducing selection for coordinated effort. As such, we suggest that coordination in parental effort will decline with age in long-lived species. Using incubation bout duration data, estimated from salt-water immersion bio-loggers, deployed on black-browed albatrosses Thalassarche melanophris, we examined the correlation in incubation bout durations for sequential bouts, as a measure of coordination. Our results show that coordination is highest in inexperienced pairs (early in reproductive life) and declines throughout the lifetime of birds. This suggests that both cooperation, indicated by coordinated effort, and conflict over care occurs in this species. We find no change in individual bout duration with increasing breeding experience, and hence no support for the hypothesis that aging leads to changes in individual incubation behaviour. This is, to our knowledge, the first study to demonstrate strong coordination in parental care when pairs share future reproductive success, but a decline in coordination with age, as sexual conflict increases. |
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109 |
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1600-0706 |
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yes |
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8078 |
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Title |
Sex-specific effects of wind on the flight decisions of a sexually dimorphic soaring bird |
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Year |
2020 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
89 |
Issue |
8 |
Pages |
1811-1823 |
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Keywords |
biologging foraging behaviour hidden Markov model movement ecology niche specialization optimization sexual segregation wandering albatross |
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Abstract |
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109 |
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ISSN |
1365-2656 |
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yes |
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Call Number |
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Serial |
8077 |
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Author |
Mike Lockwood, Carl Haines, Luke A. Barnard, Mathew J. Owens, Chris J. Scott, Aude Chambodut, Kathryn A. McWilliams |
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Title |
Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 4. Polar Cap motions and origins of the Universal Time effect |
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Year |
2021 |
Publication |
Journal of Space Weather and Space Climate |
Abbreviated Journal |
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Volume |
11 |
Issue |
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Pages |
15 |
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139 |
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2115-7251 |
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yes |
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8076 |
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Author |
O. I. Berngardt, J.-P. St- Maurice, J. M. Ruohoniemi, A. Marchaudon |
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Year |
2022 |
Publication |
Radio Science |
Abbreviated Journal |
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Volume |
57 |
Issue |
9 |
Pages |
e2021RS007338 |
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Keywords |
HF radars ionospheric absorption noise quiet-day curve radiowave propagation |
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Abstract |
Based on ray tracing in a smooth ionosphere described by the IRI-2012 model we have inferred the seasonal-diurnal dynamics of radio noise observed by four mid-latitude high-frequency (HF) radars. In the calculations, noise is assumed to be homogeneous and stationary, but the main contribution comes from the radar skip zone boundary due to focusing radiowaves effect. Noise absorption along the ray path is simulated from the IRI-2012 electron density, and from the molecular nitrogen density and electron temperatures obtained from the NRLMSISE-00 model. Earth magnetic field is not taken into account both in the absorption and ray-tracing calculations due to insufficient accuracy of the ionospheric model. The model results are compared with experimental radar data, and good agreement between the two is demonstrated. It is shown that experimentally observed seasonal and diurnal dynamics of the noise correlates well with model predictions. We demonstrated saturation effect at low noise levels. The model makes it possible to estimate the amount of absorption in D- and E-layers using noise observations at SuperDARN and SuperDARN-like poleward-oriented radars, especially at mid-latitudes. This is important for the retrieval of long term variations in the electron density in the lower ionosphere, by using wide coverage provided by these radars' network. The model also makes it feasible to interpret vertical absorption by experimental noise observations, thereby significantly expanding the capability of HF radars to monitor the lower ionosphere, and to provide data for joint analysis with other data, obtained by these radars at E- and F-layer heights. |
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312 |
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ISSN |
1944-799X |
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yes |
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8075 |
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Author |
Julien Collet, Henri Weimerskirch |
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Title |
Albatrosses can memorize locations of predictable fishing boats but favour natural foraging |
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Year |
2020 |
Publication |
Proceedings of the royal society b: biological sciences |
Abbreviated Journal |
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Volume |
287 |
Issue |
1932 |
Pages |
20200958 |
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Keywords |
albatrosses anthropogenic food cognition in the wild fisheries individual consistency resource predictability |
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109 |
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yes |
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8074 |
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Title |
Micronektonic fish species over three seamounts in the southwestern Indian Ocean |
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Year |
2020 |
Publication |
Deep Sea Research Part II: Topical Studies in Oceanography |
Abbreviated Journal |
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176 |
Issue |
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Pages |
104777 |
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Keywords |
Lanternfish Tropical waters |
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109 |
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ISSN |
0967-0645 |
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0967-0645 |
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yes |
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8073 |
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Author |
Yves Cherel |
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Title |
A review of Southern Ocean squids using nets and beaks |
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Year |
2020 |
Publication |
Marine Biodiversity |
Abbreviated Journal |
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Volume |
50 |
Issue |
6 |
Pages |
98 |
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Abstract |
This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two complementary data sets, the literature on cephalopod taxonomy and biogeography, together with predator dietary investigations. Sixty squids were recorded south of the Subtropical Front, including one circumpolar Antarctic (Psychroteuthis glacialis Thiele, 1920), 13 circumpolar Southern Ocean, 20 circumpolar subantarctic, eight regional subantarctic, and 12 occasional subantarctic species. A critical evaluation removed five species from the list, and one species has an unknown taxonomic status. The 42 Southern Ocean squids belong to three large taxonomic units, bathyteuthoids (n?=?1 species), myopsids (n?=?1), and oegopsids (n?=?40). A high level of endemism (21 species, 50%, all oegopsids) characterizes the Southern Ocean teuthofauna. Seventeen families of oegopsids are represented, with three dominating families, onychoteuthids (seven species, five endemics), ommastrephids (six species, three endemics), and cranchiids (five species, three endemics). Recent improvements in beak identification and taxonomy allowed making new correspondence between beak and species names, such as Galiteuthis suhmi (Hoyle 1886), Liguriella podophtalma Issel, 1908, and the recently described Taonius notalia Evans, in prep. Gonatus phoebetriae beaks were synonymized with those of Gonatopsis octopedatus Sasaki, 1920, thus increasing significantly the number of records and detailing the circumpolar distribution of this rarely caught Southern Ocean squid. The review extends considerably the number of species, including endemics, recorded from the Southern Ocean, but it also highlights that the corresponding species to two well-described beaks (Moroteuthopsis sp. B and Psychroteuthis sp. B) are still unknown. |
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109 |
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1867-1624 |
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yes |
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Call Number |
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8072 |
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