1991 SHORT COMMUNICATIONS A NEWLY DISCOVERED COLOI{Y OF SOT]TIIERN GIANT PETRELS MACRONECTES GIGANTEUS ON ISLA GRAN ROBR"EDO. CHI.]BUT PROVINCE. ARGENTINA

• Main Authors: G. Punta, J. Saravia
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1991
• Subjects: Argentina; Giganteus; Rocky Island; Giant Petrels; Macronectes giganteus
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.669.1039; http://marineornithology.org/PDF/19/MO_1991_23.pdf

Argentina, is located north of the Golfo San Jorge, 12 km offshore (Fig. l). It is a rocky island of approximately 0. I km2 and with a maximum elevation of 40 m above sea level; there is no vegetation and deep crevices are present throughout the island. According to local information, a colony of Southern Giant Petrels Macronectes giganteus existed on this island. To confirm its existence, we visited the island on 8 February 1989, locating the colony on the northern and higher sector of the island. Birds were at an advanced stage of the breeding cycle. The colony was filmed and photographed. Because chicks showed signs of disturbance at our approach, we estimated the number of nests from