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Author |
Nolan Paul M, Stephen Dobson F, Nicolaus Marion, Karels Tim J, McGraw Kevin J, Jouventin Pierre, |
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Title |
Mutual Mate Choice for Colorful Traits in King Penguins
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Type |
Journal Article |
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Year |
2010 |
Publication |
Ethology |
Abbreviated Journal |
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Volume |
116 |
Issue |
7 |
Pages |
635 -644 |
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Keywords |
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Abstract |
Abstract While studies of mate choice based on male color pattern are ubiquitous, studies of mate choice based on ornamental color traits in sexually monomorphic species are less common. We conducted manipulative field experiments on two color ornaments of king penguins (Aptenodytes patagonicus), the size of auricular patches of orange feathers and degree of UV reflectance from beak spots, to determine how the degree of ornamentation influenced pairing rate. In a reduction of auricular patch size, females paired significantly more quickly than males in both control and experimental samples. When this bias was taken into account statistically, pairing of individuals with reduced auricular patches was significantly delayed. We also reduced, but did not eliminate, UV reflectance from beak spots by applying a UV filter; no sex difference in pairing rate was evident in this experiment. Treated birds paired significantly more slowly than untreated control individuals, taking more than a week longer to pair on average than their unmanipulated counterparts, a result that was significant for males and approached significance for females. Our results may indicate mutual mate choice via UV reflectance of the beak spot. Given that this is a species where breeding is extremely slow and considerable investment by both males and females is required for successful reproduction, our results support the hypothesis that in such species, sexual selection might act on the same ornament in both sexes.
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354 |
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Blackwell Publishing Ltd |
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ISSN |
1439-0310 |
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Approved |
yes |
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Call Number |
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Serial |
333 |
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Author |
Gauthier Gilles, Milot Emmanuel, Weimerskirch Henri, |
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Title |
Small-scale dispersal and survival in a long-lived seabird, the wandering albatross
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Type |
Journal Article |
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Year |
2010 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
79 |
Issue |
4 |
Pages |
879 -887 |
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Keywords |
colony size, conspecific attraction, fidelity to colony, philopatry, |
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Abstract |
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Programme |
109 |
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Publisher |
Blackwell Publishing Ltd |
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ISSN |
1365-2656 |
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Approved |
yes |
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Call Number |
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Serial |
344 |
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Title |
Interdecadal changes in at-sea distribution and abundance of subantarctic seabirds along a latitudinal gradient in the Southern Indian Ocean
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Type |
Journal Article |
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Year |
2010 |
Publication |
Global Change Biology |
Abbreviated Journal |
Glob Chang Biol |
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Volume |
16 |
Issue |
7 |
Pages |
1895 -1909 |
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Keywords |
at-sea survey, Bayesian, climate change, mixture model, populations trends, Procellariiform, zero inflation, |
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Abstract |
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Programme |
109 |
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Publisher |
Blackwell Publishing Ltd |
Place of Publication |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1365-2486 |
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yes |
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Serial |
358 |
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Author |
RIVALAN PHILIPPE, BARBRAUD CHRISTOPHE, INCHAUSTI PABLO, WEIMERSKIRCH HENRI, |
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Title |
Combined impacts of longline fisheries and climate on the persistence of the Amsterdam Albatross Diomedia amsterdamensis
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Type |
Journal Article |
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Year |
2010 |
Publication |
Ibis |
Abbreviated Journal |
Ibis (Lond. 1859) |
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Volume |
152 |
Issue |
1 |
Pages |
6 -18 |
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Keywords |
Diomedea amsterdamensis, fishing effort, Indian Ocean Dipole, multistate capture-recapture models, stochastic matrix models, |
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Abstract |
Incidental capture of seabirds in longline fishing gear is a central issue in the conservation of many long-lived marine species. Despite growing evidence of climate-induced effects on population trends of long-lived species, climate change remains generally overlooked in most risk assessments of seabirds. Because variation in climate may interact with the detrimental effects of bycatch, considering climate is of great importance, especially in the context of ongoing global warming. This paper examines the combined effects of bycatch and climate change on the persistence of one of the worlds rarest birds, the Amsterdam Albatross Diomedea amsterdamensis, which has a single population in the upland plateau of Amsterdam Island (Southeast Indian Ocean). Using continuous monitoring from 1983 onwards, we first estimated the relationship between climate and the species demographic parameters. We then built a stochastic matrix population model to estimate the population growth rate and the probability that the population declines below the level recorded in 1983 of nine breeding pairs under different scenarios involving the joint effects of additional mortality caused by longline fisheries and climate change. The results suggest that the demography of the Amsterdam Albatross is influenced by climate in both breeding and wintering grounds and that these relationships may to some extent compensate for the impact of additive bycatch mortality. However, these compensatory effects would be negligible if the annual additional mortality exceeds around six individuals per year, suggesting that the resumption of longline fishery in the foraging range of the Amsterdam Albatross would rapidly put this species at risk of extinction.
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Programme |
109 |
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Corporate Author |
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Publisher |
Blackwell Publishing Ltd |
Place of Publication |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1474-919X |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
414 |
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Author |
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Title |
Looking at the unseen: combining animal bio-logging and stable isotopes to reveal a shift in the ecological niche of a deep diving predator
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Type |
Journal Article |
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Year |
2010 |
Publication |
Ecography |
Abbreviated Journal |
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Volume |
33 |
Issue |
4 |
Pages |
709 -719 |
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Keywords |
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Abstract |
Understanding how marine top predators exploit their environment is a central topic in marine ecology. Among all methodologies used to investigate this part of ecology, electronic devices are very useful to track animals' movements and foraging habitats, but they do not provide any dietary information. Stable isotopes provide information on trophic levels but remain imprecise to identify small spatial-scale habitats. In this study, we combined the two approaches to obtain a synoptic view of the foraging behaviour variability of southern elephant seals Mirounga leonina. Our results suggested marked differences in distribution, diving behaviour, foraging habitats, trophic levels, and dietary habits of elephant seals according to their sex and age. Thus, we characterized main foraging habitats over the Kerguelen-Heard Plateau and the Antarctic shelf for juvenile males, while females foraged mainly in oceanic waters of the Polar Frontal Zone and the Antarctic Zone. In addition, we highlighted the ontogeny of niche partitioning in this sexually dimorphic species. While females did not exhibit a major dietary shift in relation to their age and their breeding status, a different picture emerged for males. Young males had a trophic level identical to that of all females. However, at 34yr of age, males showed a progressive increase in trophic level. The inter-annual combination of bio-logging and stable isotopes could provide a powerful tool to investigate possible shifts in ecological niche between years according to environmental changes.
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Programme |
109 |
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Campaign |
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Corporate Author |
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Thesis |
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Publisher |
Blackwell Publishing Ltd |
Place of Publication |
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Editor |
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Original Title |
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Series Editor |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1600-0587 |
ISBN |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
463 |
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Author |
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Title |
Age and the timing of breeding in a long-lived bird: a role for stress hormones?
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Type |
Journal Article |
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Year |
2010 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
24 |
Issue |
5 |
Pages |
1007 -1016 |
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Keywords |
age, glucocorticoids, laying date, snow petrel (Pagodroma nivea), stress response, |
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Abstract |
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Programme |
109 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
Blackwell Publishing Ltd |
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 |
1365-2435 |
ISBN |
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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 |
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Call Number |
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Serial |
466 |
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Author |
Tape Carl, Liu Qinya, Maggi Alessia, Tromp Jeroen, |
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Title |
Seismic tomography of the southern California crust based on spectral-element and adjoint methods
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Type |
Journal Article |
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Year |
2010 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
180 |
Issue |
1 |
Pages |
433 -462 |
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Keywords |
Inverse theory, Body waves, Surface waves and free oscillations, Seismic tomography, Computational seismology, Crustal structure, |
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Abstract |
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Programme |
133 |
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Corporate Author |
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Publisher |
Blackwell Publishing Ltd |
Place of Publication |
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Summary Language |
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Original Title |
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Series Editor |
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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 |
1365-246X |
ISBN |
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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 |
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Call Number |
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Serial |
514 |
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Author |
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Title |
Can Kittiwakes smell? Experimental evidence in a Larid species
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Type |
Journal Article |
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Year |
2009 |
Publication |
Ibis |
Abbreviated Journal |
Ibis (Lond. 1859) |
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Volume |
151 |
Issue |
3 |
Pages |
584 -587 |
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Keywords |
bird, Black-legged Kittiwake, Rissa tridactyla, odour, olfaction., |
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Abstract |
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Programme |
1162 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
Blackwell Publishing Ltd |
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 |
1474-919X |
ISBN |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
1787 |
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Author |
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Title |
Looking at the unseen: combining animal bio-logging and stable isotopes to reveal a shift in the ecological niche of a deep diving predator
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Type |
Journal Article |
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Year |
2010 |
Publication |
Ecography |
Abbreviated Journal |
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Volume |
33 |
Issue |
4 |
Pages |
709 -719 |
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Keywords |
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Abstract |
Understanding how marine top predators exploit their environment is a central topic in marine ecology. Among all methodologies used to investigate this part of ecology, electronic devices are very useful to track animals' movements and foraging habitats, but they do not provide any dietary information. Stable isotopes provide information on trophic levels but remain imprecise to identify small spatial-scale habitats. In this study, we combined the two approaches to obtain a synoptic view of the foraging behaviour variability of southern elephant seals Mirounga leonina. Our results suggested marked differences in distribution, diving behaviour, foraging habitats, trophic levels, and dietary habits of elephant seals according to their sex and age. Thus, we characterized main foraging habitats over the Kerguelen-Heard Plateau and the Antarctic shelf for juvenile males, while females foraged mainly in oceanic waters of the Polar Frontal Zone and the Antarctic Zone. In addition, we highlighted the ontogeny of niche partitioning in this sexually dimorphic species. While females did not exhibit a major dietary shift in relation to their age and their breeding status, a different picture emerged for males. Young males had a trophic level identical to that of all females. However, at 34yr of age, males showed a progressive increase in trophic level. The inter-annual combination of bio-logging and stable isotopes could provide a powerful tool to investigate possible shifts in ecological niche between years according to environmental changes.
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Programme |
452 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
Blackwell Publishing Ltd |
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 |
1600-0587 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
1957 |
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Author |
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Title |
Leg-attached data loggers do not modify the diving performances of a foot-propelled seabird
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Type |
Journal Article |
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Year |
2009 |
Publication |
Journal of Zoology |
Abbreviated Journal |
J. Zool. (Lond.) |
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Volume |
279 |
Issue |
3 |
Pages |
294 -297 |
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Keywords |
bio-logging, GLS, impact, data-recorder, seabirds, diving, |
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Abstract |
Abstract Global location sensors (GLS) are increasingly being used to determine animal position at sea. Their small size and weight means that they can be attached to the leg of volant birds with supposedly little impact on the flight ability. However, very few studies have investigated the impact that foot-attached devices may have on the diving ability of foot-propelled seabirds. We compared the diving activity of two groups of free-ranging great cormorants Phalacrocorax carbo carbo, both groups carrying identical time-depth recorders attached to the tail, and one group also having leg-attached GLS. Our results showed that there were no differences between the two groups in any of the diving parameters investigated, at least over the short term. Caution should be exercised when extrapolating to other species, especially those smaller than great cormorants, and also when deploying GLS over longer periods.
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Programme |
388 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
Blackwell Publishing Ltd |
Place of Publication |
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Editor |
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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 |
1469-7998 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
2096 |
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