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| Hartog, J.C. den. |
| The first Western Palearctic record of a Red-footed Booby Sula sula (L., 1766), a brown whitetailed morph observed on Cima (Cape Verde Islands), is described. The status of this species in the tropical South Atlantic Ocean is evaluated. At present, Fernando de Noronha is the only South Atlantic stronghold of the species (ca. 4000 individuals; cf. Oren, 1984). The species has disappeared, or almost so, from other islands (St. Helena: absent; Ascension:0-30 individuals; Ilha da Trindade: less than 100 pairs). A link may exist between the apparent recent increase of the population of Fernando de Noronha and the apparent recent decline of the Trindade population. It seems possible that the Trindade population for some unknown reason has migrated to Fernando de... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Sula sula; Cape Verde Islands; South Atlantic Islands; Status; 42.83. |
| Ano: 1987 |
URL: http://www.repository.naturalis.nl/record/318544 |
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| Weimerskirch, Henri; Le Corre, Matthieu; Jaquemet, Sébastien; Marsac, Francis. |
| The foraging behaviour of animals depends on the distribution, abundance and predictability of their food resources. In the marine environment, top predators such as seabirds are known to concentrate their foraging effort in specific oceanic features where productivity is elevated or prey concentrated. When marine productivity is low and prey distribution unpredictable, such as in tropical waters, selection should favour the evolution of flexible foraging strategies. By using GPS, Argos transmitters and activity recorders, we studied the foraging strategy of red-footed boobies (RFBs) Sula sula breeding on Europa Island in the Mozambique Channel, to examine the way a central place forager searches for prey in tropical waters. RFBs only foraged during the... |
| Tipo: Text |
Palavras-chave: Sula sula; GPS; Satellite tracking; Mozambique Channel; Chlorophyll concentration; Sea-level height anomalies. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00209/32068/30526.pdf |
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