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The Condor 102:577584 The Cooper Ornithological Society 2000
 

Summary: [577]
The Condor 102:577­584
The Cooper Ornithological Society 2000
NOCTURNAL AND DIURNAL FORAGING ACTIVITY OF
HAWAIIAN ALBATROSSES DETECTED WITH A NEW
IMMERSION MONITOR1
PATRICIA FERNAŽ NDEZ AND DAVID J. ANDERSON2
Department of Biology, Wake Forest University, Winston-Salem, NC 27109
Abstract. We used a new immersion monitor to study the foraging movements of two
species of albatrosses that nest in the Hawaiian Islands. The monitors showed that breeding
male Black-footed Albatrosses (Phoebastria nigripes) land on the water more frequently
during the day than at night. Breeding male Laysan Albatross (Phoebastria immutabilis)
behavior was more variable and also showed a diurnal bias. We found no evidence of a
nocturnal foraging bias in either species; in particular, these species do not seem to be limited
to live capture of nocturnally available squid. Such squid may, nonetheless, contribute to
the diet as a result of scavenging.
Key words: activity monitor, Black-footed Albatross, diurnal foraging, Laysan Alba-
tross, nocturnal foraging, Phoebastria immutabilis, Phoebastria nigripes.
INTRODUCTION
Significant gaps exist in our understanding of

  

Source: Anderson, David J. - Department of Biology, Wake Forest University

 

Collections: Environmental Sciences and Ecology