Fig 1.
Male Imperial Cormorant (Phalacrocorax atriceps) instrumented with a water resistant video camera.
Photograph illustrating a camera attached to the upper back feathers of a bird.
Table 1.
General characteristics of the recorded foraging activities performed by 12 male Imperial cormorants (Phalacrocorax atriceps) carrying animal-borne video cameras breeding at Punta León, Patagonia, Argentina.
Table 2.
Characteristics of the dives and capture events of 12 male Imperial cormorants (Phalacrocorax atriceps) carrying animal-borne video cameras breeding at Punta León, Patagonia, Argentina.
Fig 2.
Body position of Imperial cormorants while foraging along the seabed.
Diagram showing the body position a) while searching for prey along the sea floor in the predominantly gravel microhabitat (the black arrow represents the extension and contraction of the neck as the birds forages) b) while searching along the seafloor in the rocky microhabitat and c) while capturing and consuming prey during the bottom phase of dives. Striped rectangles indicate the sea floor.
Fig 3.
Still frames taken from Imperial cormorants (Phalacrocorax atriceps) videos.
Representative examples showing a) the presence of a penguin in the ascent phase of a dive, b) a bird at the sea surface swallowing an Argentine seabass, c) a bird ascending through the water column with a curk-eel, and d) a bird carrying a Channel bull blenny. Each picture date and time is not the real one but the one provided by the camera.
Fig 4.
Still frames taken from Imperial cormorants (Phalacrocorax atriceps) videos.
Representative examples showing a) a bird in searching for prey in the type 1 habitat, b) a bird foraging in a rocky reef (indicated by a red arrow), and c) a bird looking for food in the type 3 habitat. Each picture date and time is not the real one but the one provided by the camera.
Fig 5.
Frequency distribution (%) of pixel brightness values.
Representative examples of a) a picture classified as belonging to Zone 1, b) a picture classified as belonging to Zone 2 and c) a picture from Zone 3.