Aggressive behavior of female and male magellanic penguins (spheniscus magellanicus) nesting at San Francisco Zoo, San Francisco, California

<p>Between 15 March and 29 July 1998 we quantified aggressive movements (AMs) in a breeding colony of 44 adult magellanic penguins (MPs) during their nesting season at San Francisco Zoo (SFZ). We sampled their behavior for a total of 149.5 hrs in 46 sessions of 195 min each, all starting at 0945 hrs and stopping at 1300 hrs. We recognized 4 types of AMs, of which 2 (eye-pointing and charging) were threat signals, I (bill-fencing) was a ritualized contest of strength and agility, and I (biting) was physical attack. MPs only performed AMs within 2-3 m of nest entrances. Males performed 83% of all AMs, females 17%. The eye-pointing threat signal accounted for 92% of all AMs, and the 3 non-attack AMs combined accounted for 99% of all AMs; only I% involved physical assault. Both sexes performed eye-pointing and bill-fencing, but only males charged or bit their adversaries.</p>

Name thesis:degree_name

Master of Science (M.S.)

Level thesis:degree_level

Thesis - Pacific Access Restricted

Discipline thesis:degree_discipline

Biological Sciences

Year dc:date.available

2000

Author dc:creator

• Stone, Derik M.

Contributors dc:contributor

• Richard Tenaza

• Penguins Behavior
• Penguins Nests
• Aggressive behavior in animals
• Animal Sciences
• Life Sciences
• Zoology

Licence

• http://rightsstatements.org/vocab/InC/1.0/

Repository record dc:identifier

https://scholarlycommons.pacific.edu/uop_etds/538

OAI identifier oai:identifier

oai:scholarlycommons.pacific.edu:uop_etds-1537