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Digitale Medien

Ecophysiology Nature and function (2002)

Le Maho, Yvon

[s.l.] : Nature Publishing Group

Nature 416 (2002), S. 21-21

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] One of the main scientific challenges of the new century is to assess the impact of people on the environment, including climate, and the effect that the changes we make will have on other living organisms. The key consideration is the ability of plants and animals to adapt to these man-made ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/416021a

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Digitale Medien

Ecophysiology Penguin fathers preserve food for their chicks (2000)

Gauthier-Clerc, Michel ; Clerquin, Yannick ; Drault, Samuel ; [weitere]

[s.l.] : Macmillan Magazines Ltd.

Nature 408 (2000), S. 928-929

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The king penguin Aptenodytes patagonicus feeds only at sea and must live off its reserves when it comes ashore to breed. We found that male penguins returning to their egg between three weeks before and ten days after it hatches bring food for the chick in their stomachs. This food can be ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/35050163

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Digitale Medien

Non-invasive bird tagging (1995)

Michard, Delphine ; Ancel, André ; Gendner, Jean-Paul ; [weitere]

[s.l.] : Nature Publishing Group

Nature 376 (1995), S. 649-650

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] SIR - Western European populations of the white stork (Ciconia ciconia) declined to near extinction in the 1970s1. The populations were saved by keeping fledgling storks captive until sexual maturity (for about three years), thereby preventing their autumnal migration to Africa2, where many deaths ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/376649a0

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Digitale Medien

Is Penguin banding harmless? (1998)

Froget, Guillaume ; Gautier-Clerc, Michel ; Le Maho, Yvon ; [weitere]

Springer

Polar biology 20 (1998), S. 409-413

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ISSN: 1432-2056

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Thousands of penguins are banded annually world-wide, even though little is known about the potential impact of these flipper bands. In this paper, the possible effect of banding on the survivorship, breeding frequency and other ecological factors on king penguins was investigated. The extended laying period (3–4 months) of the king penguin allows the observation of non-lethal effects that could influence the time of laying and thus the reproductive success. Three hundred and eighty-three breeding king penguins on the colony of “la Baie du Marin” on Possession Island, Crozet Archipelago were either single- or double-flipper banded. The results show that the returning birds were laying late the following breeding season, and that double-banded birds lay significantly later than single-banded birds. Furthermore, our data suggest a lower return rate for double-banded birds than for single-banded birds (45% as opposed to 76%). The low return rate of single-banded birds, when compared to an interannual survivorship estimated to be 96.5%, also raises questions concerning the potential impact of single banding.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s003000050322

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Digitale Medien

Recess behaviour of the incubating Common Eider Somateria mollissima (2000)

Criscuolo, Francois ; Gauthier-Clerc, Michel ; Gabrielsen, Geir Wing ; [weitere]

Springer

Polar biology 23 (2000), S. 571-574

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ISSN: 1432-2056

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Female eiders show the highest incubation constancy among ducks. However, detailed data on their behaviour during the short recesses were not available. In this study, activities during recesses were observed in a colony of female eiders breeding in the high arctic to define what the principal purposes of these temporary nest desertions are. Incubating eiders do not feed during their recess periods. Drinking salt or fresh water or eating snow (28.7%) and preening (38.0%) were the two main activities observed. After snow melting, the time spent drinking decreased (14.3%) while the time spent preening was unchanged (38.1%). Moreover, despite the fact that females started to fly longer distances to reach fresh water sources, the recess duration did not change significantly (401.5 vs 431.0 s). Since recess during incubation increases the risk of breeding failure, drinking presumably has an important survival value for female eiders. In this context, our data suggest that searching for fresh water at a greater distance is favoured despite the higher energetic cost for a fasting bird.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s003000000123

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