• Personality assessment in African elephants (Loxodonta africana): Comparing the temporal stability of ethological coding versus trait rating

      Horback, Kristina M.; Miller, Lance J.; Kuczaj, Stan A. (2013)
      The consistency of personality assessment was addressed in this study of 12 zoological African elephants living at the San Diego Zoo Safari Park in Escondido, CA, USA during the 2010 and 2011 summer seasons. Using 480 h of observational behavior data, three personality traits were determined based on behavior events, with the most significant correlations (two-tailed rs > 0.77, P < 0.005) being playful, curious, and sociable….
    • Regurgitation and reingestion in bonobos (Pan paniscus): Relationships between abnormal and social behavior

      Miller, Lance J.; Tobey, Jennifer R. (2012)
      Regurgitation and reingestion (R/R) is an abnormal behavior observed in great apes analogous to rumination syndrome in humans….The purpose of the current study was to examine R/R in 14 bonobos (Pan paniscus) at two zoological institutions. This included examining the relationships between R/R and other bonobo behaviors as well as the effect of a change in social groupings on R/R….
    • The effects of GPS collars on African elephant (Loxodonta africana) behavior at the San Diego Zoo Safari Park

      Horback, Kristina Marie; Miller, Lance J.; Andrews, Jeffrey; Kuczaj, Stanley Abraham; Anderson, Matthew J. (2012)
      The use of tracking devices (e.g., VHF radio collars, GPS collars, ear transmitters) enables researchers to assess activity budgets, species-specific movement patterns, effects of environmental enrichment, and exercise levels in zoo animals….The present study examined solitary and social behavior rates, as well as overall activity budgets, in eight African elephants living at the San Diego Zoo Safari Park, Escondido, CA, USA....