The core-to-core program of JSPS
HOPE project

Kyoto Conference
"Delphinid and primate social ecology: A comparative discussion"

Date: July 29-30, 2005
Place: Kyodai-kaikan, Kyoto


Juichi Yamagiwa (Kyoto University)
Leszek Karczmarski (Texas A&M University)
Toshio Kasuya (Teikyo University of Science & Technology)
partly supported by HOPE

Aim of the conference in Kyoto (and symposium in Sapporo):

Delphinids and primates have developed similar cognitive abilities in different environments. In spite of large differences in their morphological and physiological features, both taxa show similar aspects of social organization, such as male-bonded and bisexually bonded societies, or fission-fusion and long-term stable societies. Recent studies indicate the importance of ecological and demographic factors in shaping delphinid and primate social systems. In some cases, social dynamics of primates and delphinids seem to follow a remarkably similar trait. With a substantial amount of data accumulated over the past years, a framework is now in place for examining in a broader comparative perspective how ecology shapes the dynamics and structure of delphinid and primate social lives. Based on a number of longitudinal studies, we will compare the social ecology of delphinids and primates to elucidate social evolution of these highly intellectual mammals in both water and forest environments. We will discuss mating strategies, social behavior and social networks, foraging strategies, communication, social learning, economics of behavior and behavioral plasticity, social evolution, and culture. We believe that such a comparison between primate and dolphin societies will provide useful insight into ecological pressures influencing sociality, and a valuable step towards the understanding of selective pressures that shape mammalian social systems. 

<A session of the Kyoto conference was supported by HOPE>

Hope project: