Differences in Mother-Infant Bond and Social Behavior of African Elephant Calves Living In Situ and Ex Situ
African zoo elephants live in safe environments with sufficient resources, are protected from threats, and have their health and body conditions cared for. Calves ex situ undergo the same developmental stages as in situ and are raised by the whole family unit. However, due to environmental differences, there might be behavioral modifications between calves in […]
Increasing browse and social complexity can improve zoo elephant welfare
While recent work has assessed how environmental and managerial changes influence elephant welfare across multiple zoos, few studies have addressed the effects of management changes within a single institution. In this paper, we examine how management changes related to social structure and diet affect the behavior of a group of zoo elephants over a 23‐month […]
Serum cortisol concentrations associated with artificial insemination events in an African elephant (Loxodonta africana)
Elephants are among the most charismatic and controversial species in modern zoo collections. Advanced cognitive and emotional capabilities have been attributed to elephants. As a result, good zoo management includes monitoring and enhancing the well-being of individual animals. To this purpose, we have assessed the serum cortisol concentration (SCC) of an adult female African elephant […]
A review of Asian and African elephant gastrointestinal anatomy, physiology and pharmacology
Elephants are susceptible to a variety of gastrointestinal problems. Knowledge of elephant nutrition and gastrointestinal anatomy, physiology, and pharmacology is essential for successful treatment, especially because diagnostic options are limited. The horse is considered the most appropriate model for extrapolation to the elephant. While similarities do exist, elephant-specific information is needed, especially in the areas […]
Social factors influence ovarian acyclicity in captive African elephants (Loxodonta africana)
Nearly one-third of reproductive age African elephants in North America that are hormonally monitored fail to exhibit estrous cycle activity, which exacerbates the nonsustainability of the captive population. Three surveys were distributed to facilities housing female African elephants to determine how social and environmental variables contribute to cyclicity problems. Forty-six facilities returned all three surveys […]
Rumble vocalizations mediate interpartner distance in African elephants, Loxodonta africana
The ability to utilize contact calls to facilitate reunions with social partners has been documented in a number of species showing a fission/fusion social organization. Field observations and playback experiments suggest that African elephants use low-frequency rumble vocalizations to reunite with their herd members following periods of fission. Using a digital audio and GPS recording […]
Sexual dimorphism in the performance of chemosensory investigatory behaviours by African elephants (Loxodonta africana)
Sexual dimorphism in morphology can be accompanied by behavioural differences between the sexes. We examined if investigatory behaviour involving the trunk of African elephants showed sexual dimorphism. Males compete and search for females, but they have a lengthy period of development before they are socially viable mates. Receptive females are relatively rare. We hypothesized that […]
Tuberculosis in Elephants in North America
Within the past 4 years, tuberculosis (TB) has emerged as a disease of concern in elephants. The population of elephants in North America is declining [Wiese, 1997], and transmissible diseases such as TB may exacerbate this trend. Guidelines for the Control of Tuberculosis in Elephants, which require the screening of all elephants for TB, were […]
Review of a Newly Recognized Disease of Elephants Caused by Endotheliotropic Herpesviruses
There are two newly recognized herpesviruses that cause a fatal disease syndrome in elephants. They are known as the elephant endotheliotropic herpesviruses, of which one is fatal for Asian elephants (Elephas maximus) and the other for African elephants (Loxodonta africana) [Richman et al., Science 283:1171–1176, 1999a]. The disease syndrome affects predominantly young elephants and has […]
The Sizes of Elephant Groups in Zoos: Implications for Elephant Welfare
This study examined the distribution of 495 Asian elephants (Elephas maximus) and 336 African elephants (Loxodonta africana) in 194 zoos, most of which were located in Europe (49.1%) and North America (32.6%). Cows outnumbered bulls 4 to 1 (Loxodonta) and 3 to 1 (Elephas). Groups contained 7 or fewer: mean, 4.28 ( D 5.73). One […]