Space use by foraging Galápagos penguins during chick rearing
نویسندگان
چکیده
منابع مشابه
Foraging by Humboldt penguins (Spheniscus humboldti) during the chick-rearing period: general patterns, sex differences, and recommendations to reduce incidental catches in fishing nets
We studied the foraging behaviour of endangered Humboldt penguins (Spheniscus humboldti) to examine general foraging patterns, sex differences in foraging behaviour, and the reasons for incidental catches in fishing nets. Humboldt penguins foraged diurnally and typically made short, shallow dives within 30 m of the surface. Males and females made overnight (lasting 25.8 ± 3.4 h; mean ± SD) and ...
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We developed an automated method using depth and one axis of body acceleration data recorded by animal-borne data loggers to identify activities of penguins over long-term deployments. Using this technique, we evaluated the activity time budget of emperor penguins (n = 10) both in water and on sea ice during foraging trips in chick-rearing season. During the foraging trips, emperor penguins alt...
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Study of physiological mechanisms can help us to understand how animals respond to changing environmental conditions. In particular, stress hormones (i.e. glucocorticoids, such as corticosterone) are described as mediating resource allocation, allowing animals to adjust their physiology and behaviour to predictable and unpredictable changes in the environment. In this study, we investigated the...
متن کاملGeographic variation in the foraging behaviour, diet and chick growth of rockhopper penguins
The foraging ecology of rockhopper penguins was investigated at 3 sites marked by contrasting ecological conditions. The northern subspecies was studied at Amsterdam Island (AMS) in oceanic subtropical waters, and the southern subspecies at the Kerguelen Archipelago (KER) in a subantarctic coastal habitat and at the Crozet Archipelago (CRO) in subantarctic neritic waters. During the brooding pe...
متن کاملHematology, serum chemistry, and serology of Galápagos penguins (Spheniscus mendiculus) in the Galápagos Islands, Ecuador.
The Galápagos penguin (Spheniscus mendiculus) is an endangered species endemic to the Galápagos Islands, Ecuador. In 2003 and 2004, 195 penguins from 13 colonies on the islands of Isabela and Fernandina in the Galápagos archipelago were examined. Genetic sexing of 157 penguins revealed 62 females and 95 males. Hematology consisted of packed cell volume (n = 134), white blood cell differentials ...
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ژورنال
عنوان ژورنال: Endangered Species Research
سال: 2008
ISSN: 1863-5407,1613-4796
DOI: 10.3354/esr00046