King penguins adjust foraging effort rather than diet when faced with poor foraging conditions
International audience The links between foraging success, foraging effort and diet in a myctophid specialist seabird, the King Penguin Aptenodytes patagonicus, were investigated during seven breeding seasons using tracking and isotopic data. Despite the variable foraging conditions encountered by t...
Published in: | Ibis |
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Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2023
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Subjects: | |
Online Access: | https://hal.science/hal-04284040 https://hal.science/hal-04284040/document https://hal.science/hal-04284040/file/Brisson%20Curadeau%20Bost%20Ibis%202023.pdf https://doi.org/10.1111/ibi.13287 |
Summary: | International audience The links between foraging success, foraging effort and diet in a myctophid specialist seabird, the King Penguin Aptenodytes patagonicus, were investigated during seven breeding seasons using tracking and isotopic data. Despite the variable foraging conditions encountered by the birds, isotopic signature (a proxy for diet) were invariable throughout the study. On the other hand, penguins stayed longer at sea when the foraging success indices (i.e. prey capture atempts per day and mass gained per day) were low. While King Penguins can compensate low prey capture rates by increasing foraging effort, their specialist diet during reproduction makes the species particularly sensitive to prey availability, with its conservation tightly linked to its main prey. |
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