Fission–fusion dynamics of a megaherbivore are driven by ecological, anthropogenic, temporal, and social factors

Fission–fusion dynamics hypothetically enable animals to exploit dispersed and ephemeral food resources while minimizing predation risk. Disentangling factors affecting group size and composition of fission–fusion species facilitates their management and conservation. We used a 6-year data set of 2888 group formations of Masai giraffes in Tanzania to investigate determinants of social group size and structure. […]

The impact of age-class and social context on fecal glucocorticoid metabolite levels in free-ranging male giraffes

One of the primary sources of perceived stress is the social environment of an animal and the interactions with conspecifics. An essential component of the response to a stressor is the activation of the hypothalamic–pituitary–adrenocortical axis, which results amongst others in a temporal increase in circulating glucocorticoid (GC) levels. Giraffes occur in a highly flexible […]

Seasonal changes in social networks of giraffes

Fission-fusion social societies allow animals to respond in a flexible manner to environmental changes by adapting the size and composition of a group. Although group members change frequently in these systems, associations with preferred partners may be found. In this study, we examined the grouping patterns of a population of 80 individual giraffes in a […]

Factors affecting group size and vigilance behaviour of Maasai Giraffe (Giraffa Camelopardalis Tippelskirchi) in the Serengeti Ngorongoro Ecosystem, Tanzania

This study investigates factors affecting group sizes of Maasai giraffe (Giraffa camelopardalis tippelskirchi) in the Serengeti-Ngorongoro ecosystem, northern Tanzania. Various studies on giraffes have been conducted in the past, but none has investigated factors affecting giraffes’ group size and vigilance behavior in this vast ecosystem. As a result, I was motivated to investigate the following […]