Visitors' Effects on the Welfare of Animals in the Zoo: A Review

Since the 1970s, research about zoo visitors' effects on the welfare of nonhuman animals in captivity has intensified. Numerous studies have shown that characteristics such as visitor presence, density, activity, size, and position are associated with animal behavioral and—to alesser extent physiological—changes. Studies usually interpret these changes as negative (undesirable) or positive (enriching), but it remains unclear whether they significantly impinge on animal welfare. To make confident conclusions about visitors' effects necessitates more studies using (a) a wider range of animal groupings, (b) measures of stress, (c) visitor-animal variables, and (d) other methodological improvements In the meantime, in addition to further research, individual zoos need to emphasize (a) monitoring the stress indicators of their captive animals, (b) observing visitor behavior, and (c) ensuring that staffs are aware of the “visitor effect” concept.     

The gap in technology for visitor experience in a zoo: A case study in Indonesia

Technology has routinely been used in zoos to enhance the visitor experience, for public education and for conservation awareness. However, studies into technology-aided exhibits in zoos have thus far been limited to zoos in western society. This article reports on an Indonesian zoo deploying new technology in its exhibits and how visitors interacted with these exhibits. A case study guided both an investigation of the visitors' technology usage of zoo exhibits and zoo implementation of technological processes. Interviews with visitors, zoo staff, and managers were conducted and analyzed and these were supplemented with on-site observations. The results indicated that the majority of zoo visitors did not use the technological applications provided by the zoo. In addition, there was found to be a significant lack of staff engagement in the consultation, design, implementation, and maintenance of the technology. Correlations were found between visitors' level of technology usage, their reading of signage, their day-to-day technology usage, and their conservation knowledge. The findings suggest that an understanding of visitor' behavior, active staff engagement in the development and implementation of new technology, in addition to emotion-inducing interpretation, and purposefully guided interactions, could increase the use of technology at a zoo and thus enhance positive visitor engagement, ultimately resulting in heightened educational as well as conservational outcomes.     

Visitor Behaviors and Perceptions of Jaguar Activities

ABSTRACT

Zoo animals serve an important function in helping educate the public about their conservation needs. Despite this important function, little is understood about how visitors perceive different zoo exhibits and the animals that reside within them. In the present study, the behaviors displayed by two jaguars located at the Woodland Park Zoo were correlated with visitor behaviors and perceptions. Overall, visitors perceived their enjoyment to be lower when a jaguar was out of sight and rated the behavioral welfare of the jaguar to be lower when it was engaged in stereotypic behaviors. In addition, visitors who described a jaguar's behavior as stereotypic were significantly more likely to give lower ratings than those who perceived the jaguar to be active. It is suggested that by understanding how visitors perceive exhibited animals, zoos can address these perceptions in order to create more positive experiences for their visitors.     

Public perceptions of behavioral enrichment: Assumptions gone awry

More and more, zoos are integrating behavioral enrichment programs into their management routines. Given the newness of such programs on an official level, however, there are an increasing number of enrichment decisions based on assumption. Enrichment is typically not provided on exhibit, especially for exhibits considered to be more naturalistic, because it is assumed to affect visitors' experience negatively. To test that assumption, visitors were interviewed in front of four exhibits—an outdoor barren grotto, an outdoor vegetated grotto, an indoor immersion exhibit, and an outdoor traditional cage—each with either natural, nonnatural or no enrichment objects present. Specifically, we wanted to know whether (1) the exhibit's perceived educational message, (2) the animal's perceived “happiness,” and (3) the visitor perceptions of enrichment, the naturalism of animal's behavior, and zoo animal well-being changed as a function of object type. Overall, the type of enrichment object had little impact on visitor perceptions. In the outdoor barren grotto, only visitor perceptions of exhibit naturalism were affected by object type. In the outdoor vegetated grotto, object type influenced visitors perceptions of enrichment and exhibit naturalism. For the indoor immersion exhibit, general perceptions of enrichment and the perceived naturalism of the animal's behavior were affected. Finally, in the outdoor traditional cage, perceived educational message and general perceptions of enrichment changed as a function of object type. Zoo Biol 17:525–534, 1998. © 1998 Wiley-Liss, Inc.     

Variation in visitor perceptions of a polar bear enclosure based on the presence of natural vs. un-natural enrichment items

A debate exists among modern zoo staff as to whether or not the addition of un-naturalistic enrichment takes away from, or even defeats, the educational messages designers are trying to incorporate in naturalistic exhibits. A visitor study was conducted at the Central Park Zoo's polar bear exhibit in order to determine whether or not the type of enrichment in an enclosure actually alters guest perceptions. Visitors were exposed to one of two enrichment treatments in the bear enclosure: Naturalistic or Un-naturalistic. The results of this study suggest that enrichment type did not alter the perceptions of visitors. However, it did identify some of the different ways adults and youths perceive animals and zoos. Additionally, the study highlighted the varying perceptions individuals have of the concept of polar bears vs. their perceptions of the captive individuals at the Central Park Zoo. Implications for enrichment usage and exhibit design are discussed. Zoo Biol 28:292–306, 2009. © 2008 Wiley-Liss, Inc.     

Visitor effects on a zoo population of California sea lions (Zalophus californianus) and harbor seals (Phoca vitulina)

The effects of visitor presence on zoo and aquarium animals have become increasingly well studied, using measures such as behavioral responses and exhibit usage. Many taxa remain underrepresented in this literature; this is the case for marine mammals, despite widespread public concern for their welfare in managed care settings. The current study therefore used behavioral activity budgets and exhibit usage to assess the responses of California sea lions (Zalophus californianus) and harbor seals (Phoca vitulina) to visitors at the Seal Cove exhibit at Six Flags Discovery Kingdom, Vallejo CA. Data was collected via focal follow video recordings over the summer season of 2016, and analyzed using MANCOVAs, discriminant analyses, and modified Spread of Participation Indices. The sea lions showed no significant changes in behavior when visitors were present, but did show greater preference for the water bordering visitor viewing areas during these times. Two sea lions gave birth during the study period, and showed greater preference for land areas both adjacent to and out of sight of visitors when nursing compared to while pregnant. In contrast, the harbor seals showed significant behavioral changes in the presence of visitors, including increased vigilance and feeding. This was associated with increased preferential use of water areas adjacent to the visitor viewing area. Visitors were able to purchase fish to throw to the animals, which likely contributed to the differences observed. Overall, this study found little evidence for negative visitor impacts on two pinniped species in a zoo setting.     

The Role of Zoos in Modern Society—A Comparison of Zoos' Reported Priorities and What Visitors Believe They Should Be

Modern zoos are required to fulfill a growing number of responsibilities including scientific research, wildlife conservation, public recreation, and education. With so many roles and responsibilities and limited funds, zoos have to prioritize their activities in relation to their own specified goals, objectives, and mission statements. Given their desire to nurture community relations and educational opportunities, it is important to determine the extent to which zoos are prioritizing their activities, according to visitors' expectations. This paper presents empirical research of a two staged mixed-methods investigation into zoo priorities from both zoos' and visitors' perspectives. The first stage involved an online questionnaire to which more than 190 zoos across 52 countries reported their priorities and activities. We then undertook in-depth case studies in nine institutions, enabling direct observation of each site within its context, including face-to-face visitor interviews. Our research contrasts the priority given to zoo activities from each perspective and indicates that educating visitors, including school children, is the highest priority activity from the zoos' perspective and that of their visitors. The findings also show that visitors place high value on learning about actions they can take to help conservation efforts. Some inconsistencies between zoos' and visitors' priorities were also evident, such as the different emphasis placed on viewing endemic species, and zoos being a place for people to relax and socialize. The implications of these findings are discussed.     

Dither: A unifying model of the effects of visitor numbers on zoo animal behavior

Interest in the impact of human presence on the behavior and well-being of zoo and aquarium animals is increasing. Previous work has conceptualized the presence of zoo visitors as having one of three impacts on the behavior of animals in zoos: positive, negative, or neutral. Research suggests the same species may exhibit all three responses under different conditions, calling into question whether the positive/negative/neutral framework is the most useful way of considering visitor impact on animal behavior. Here we present a model of visitor effects that unifies these three predictions. Our model suggests that zoo-goers may provide a “dither effect” for some animals living in zoos. We posit animals may show nonlinear behavioral responses over a range of visitor densities, effectively exhibiting changes in both comfortable and anxiety-like behaviors under different levels of human presence. We tested this model during two COVID-19 related closures at the San Francisco Zoo, studying seven species for evidence of nonlinear relationships between visitor numbers and animal behavior. Our results support the dither effect acting in several species observed.     

Evaluation of Factors Affecting Emotional Responses in Zoo Visitors and the Impact of Emotion on Conservation Mindedness

Creating experiences for visitors that increase their biological knowledge and inspire conservation mindedness is a critical task for zoos and aquariums. A growing body of literature suggests that emotional stimulation is affected by characteristics of both the visitor and the visitor's experiences and is important for learning and inspiring pro-environmental sentiment. In this study we explored relationships between emotional experience, the factors that influence it, visitors' predispositions toward nature, and their reports of conservation mindedness after viewing three carnivore exhibits at the Bronx Zoo, USA. We surveyed visitors after they viewed tigers, African wild dogs, and spotted hyenas during baseline conditions or when the animals were given environmental enrichment to stimulate natural behavior and activity. We asked visitors to report their predispositions toward nature, the extent of positive emotional experiences they had while viewing the animals, and how the experience affected their conservation mindedness. Environmental enrichment significantly increased animal behavioral diversity, particularly for African wild dogs, and contributed to visitors reporting having had an up-close encounter with the animals, both of which affected the strength of positive emotional experiences at the exhibits. The extent of eye contact with the animal and the animal species also significantly affected emotional responses. Women reported stronger emotional experiences than men, however younger adults did not experience stronger positive emotional responses than older participants. Visitors' predispositions toward nature and emotional responses were significantly correlated. Strong predispositions toward nature and emotional experiences produced significantly stronger reports of conservation mindedness in visitors as a result of their experience at the exhibit. These findings have implications for animal husbandry, exhibit design, education, and outreach efforts for zoos.     

Zoo Playgrounds: A Source of Enrichment or Stress for a Group of Nearby Cockatoos? A Case Study

There is increasing evidence that in some circumstances, zoo visitors may be aversive stimuli to nonhuman animals housed in zoos. Yet, most previous research has focused on primates with little attention given to numerous other species who are housed in zoos. The focus animal of this project was the cockatoo, a species who has received minimal attention in zoo-based research. Furthermore, although the influence of the zoo setting has become increasingly important in visitor effect studies, this is the 1st study to quantify the effect of activity at a children's playground on zoo animals. There was an investigation on the effect of a zoo playground on the behavior of citron-crested and Moluccan cockatoos (Cacatua sulphurea citrinocristata and Cacatua moluccensis), as well as the effect of children standing in front of the birds' aviaries. The results showed that in some circumstances, the Moluccan cockatoos retreated from visitors, while the citron-crested cockatoos did not retreat from visitors and became more social in the presence of visitors. These findings highlight the importance of careful selection of species and individual animals to be housed near zoo playgrounds.     

Life Sciences Learning: An Approach That Promotes Progress and Respects Life

Welfare improvements for nonhuman animals should aim to satisfy the needs of visitors as well as those of the animals. Little research has been conducted, however, and existing work is confined to zoos in developed countries. This article reports the behavioral responses of Chinese visitors to environmental enrichment improvements in a zoo enclosure. Visit, viewing, and stopping behaviors significantly increased at the transformed exhibit, indicating that it provoked greater visitor interest. Furthermore, increased intragroup behaviors suggested that the exhibit probably motivated visitors to interact socially. The positive impact of the exhibit changes supports the enrichment efforts taking place in zoos around the world. The changes also provide encouragement for zoos in developing countries such as China because greater visitor interest provides a strong argument and an incentive for improving welfare standards.     

The influence of environmental enrichment on Chinese visitor behavior

Welfare improvements for nonhuman animals should aim to satisfy the needs of visitors as well as those of the animals. Little research has been conducted, however, and existing work is confined to zoos in developed countries. This article reports the behavioral responses of Chinese visitors to environmental enrichment improvements in a zoo enclosure. Visit, viewing, and stopping behaviors significantly increased at the transformed exhibit, indicating that it provoked greater visitor interest. Furthermore, increased intragroup behaviors suggested that the exhibit probably motivated visitors to interact socially. The positive impact of the exhibit changes supports the enrichment efforts taking place in zoos around the world. The changes also provide encouragement for zoos in developing countries such as China because greater visitor interest provides a strong argument and an incentive for improving welfare standards.     

Postoccupancy evaluation of staff,visitors, and three species of animals in a zoo setting

Postoccupancy evaluation (POE) was used to assess newly constructed zoo exhibits from the perspective of three user groups: zoo staff, zoo visitors, and the animals. Staff represents a generally understudied user group in zoo-based POEs. We asked staff to rate the animals' space, the visitors' space, and the staff's space at previous and new exhibits. We also compared zoo visitors' ratings of the animals' behavior and environments, overall exhibit impressions, and the time visitors spent viewing previous and new exhibits. Lastly, we compared activity and space use of a Komodo dragon (Varanus komodoensis), two red pandas (Ailurus fulgens), and one rhinoceros (Rhinoceros unicornis) in their previous and new exhibits. Staff rated animal, visitor, and staff areas higher at the new exhibits compared to the previous exhibits. Visitors also rated several factors higher and spent more time at the new exhibits. The most naturalistic exhibit received the most favorable ratings in all categories and animal activity increased visitor stay time. We found that red pandas were less active in their new exhibit, and the Komodo dragon and rhino showed no difference in activity. The red pandas and the Komodo dragon used more available space in their new exhibits; however, we recommend using Electivity index to examine resource preferences for these species, whose enclosure use has been less studied than large mammals. We emphasize the importance of including staff in zoo-based POE, make other recommendations for future POE studies, and discuss various factors that could have influenced our results.     

An investigation into the determining factors of zoo visitor attendances in UK zoos

The debate as to which animals are most beneficial to keep in zoos in terms of financial and conservative value is readily disputed; however, demographic factors have also been shown to relate to visitor numbers on an international level. The main aims of this research were: (1) To observe the distribution and location of zoos across the UK, (2) to develop a way of calculating zoo popularity in terms of the species kept within a collection and (3) to investigate the factors related to visitor numbers regarding admission costs, popularity of the collection in terms of the species kept and local demographic factors. Zoo visitor numbers were positively correlated with generated popularity ratings for zoos based on the species kept within a collection and admission prices (Pearson correlation: n = 34, r = 0.268, P = 0.126 and n = 34, r = −0.430, P = 0.011). Animal collections are aggregated around large cities and tourist regions, particularly coastal areas. No relationship between demographic variables and visitor numbers was found (Pearson correlation: n = 34, r = 0.268, P = 0.126), which suggests that the popularity of a zoo''s collection relative to the types and numbers of species kept is more indicative of a collection''s visitor numbers than its surrounding demographic figures. Zoos should incorporate generating high popularity scores as part of their collection planning strategies, to ensure that they thrive in the future, not only as tourist attractions but also as major conservation organizations.     

A Case for a Naturalistic Perspective: Response to Lawrence and Bekoff

ABSTRACT

We evaluated three forms of primate free-ranging displays at Singapore Zoo, each with varying restrictions on ranging area and freedom for the primates, as well as visitor proximity. The cotton-top tamarin (Saguinus oedipus), the white-faced saki (Pithecia pithecia), and the orangutan (Pongo pygmaeus) displays illustrated differences in primate visibility to visitors, visitor–primate proximity, frequency of visitor–primate interactions, visitor crowd size, and responses. Amongst the three free-ranging displays, the cotton-top tamarins offered the highest visibility, closest proximity between visitors and primates, highest interaction levels, and attracted the largest crowds. However, undesirable interactions occurred most between the cotton-top tamarins and visitors. We found consistently positive visitor perceptions (total n = 464) of all three primate displays in terms of visitor enjoyment (> 95%); naturalistic zoo experience (> 95%); learning experience (> 90%); and the promotion of good welfare (> 90%). Increasingly naturalistic displays of animals in zoos through the free-ranging of animals can have considerable benefits for both zoo visitors as well as animals, and is a display concept that deserves implementation on a wider scale. Design and implementation of such displays should, however, achieve a balance to maximise display value and animal welfare while curtailing the effects of undesirable human–primate interactions through the restriction of visitor–primate proximity.     

Visitor circulation and nonhuman animal welfare: an overlooked variable?

This article investigates visitor circulation and behaviors within a gallery of primate exhibits in relation to their possible implications for nonhuman animal welfare. When entering a primate house, the majority of visitors (84%) turned right, a pattern upheld throughout all times of the day. These findings demonstrate the existence of the “right-turn ”principle, a concept previously identified and investigated in the museum setting. The existence of this circulation pattern in zoos has important implications for the practical management of animal welfare issues because unbalanced or large numbers of visitors at specific enclosures could present a stressful influence. The “direction bias ”could not be attributed to demographic or behavioral traits, therefore suggesting that the principle, like similar findings from museum research, generalizes across visitor populations and, therefore, zoos. A visitor sample at another exhibit (located outside the exhibit gallery) did not display a direction bias, suggesting that the marked circulation pattern may be specific to exhibit galleries. The article discusses the significance and consequences of visitor circulation with respect to visitor management and animal welfare.     

Activity budget and spatial distribution of Bennett's wallabies (Macropus rufogriseus) in open versus closed exhibit designs

Although many studies investigating the impacts of zoo exhibit designs on captive animals exist, none have been performed on how they influence the behavior and welfare of captive Bennett's wallabies (Macropus rufogriseus). Here, we assess the impact of exhibit design on the activity budget and spatial distribution of Bennett's wallabies. We compared animal behavior in two open exhibits (i.e. physical interaction between animals and visitors permitted) to two closed exhibits (i.e. physical interaction between animals and visitors prohibited). Behavioral data were collected using focal sampling, and spatial distribution was recorded on exhibit maps at regular time intervals. We found a significant increase in feeding and interactive behaviors in closed exhibits in comparison to open exhibits. However, other behaviors such as resting, locomotion, and vigilance did not vary with design. Functional use of space was similar between both designs; however, the effect of habituation may be relevant to consider in future studies. Although some support for visitor effects were present, our study provided no evidence for strong impacts of exhibit design on Bennett's wallaby welfare. Our study emphasizes the need for additional research into the impacts of how zoo environments affect Bennett's wallaby behavior and welfare.     

Visitor Circulation and Nonhuman Animal Welfare: An Overlooked Variable?

This article investigates visitor circulation and behaviors within a gallery of primate exhibits in relation to their possible implications for nonhuman animal welfare. When entering a primate house, the majority of visitors (84%) turned right, a pattern upheld throughout all times of the day. These findings demonstrate the existence of the "right-turn" principle, a concept previously identified and investigated in the museum setting. The existence of this circulation pattern in zoos has important implications for the practical management of animal welfare issues because unbalanced or large numbers of visitors at specific enclosures could present a stressful influence. The "direction bias" could not be attributed to demographic or behavioral traits, therefore suggesting that the principle, like similar findings from museum research, generalizes across visitor populations and, therefore, zoos. A visitor sample at another exhibit (located outside the exhibit gallery) did not display a direction bias, suggesting that the marked circulation pattern may be specific to exhibit galleries. The article discusses the significance and consequences of visitor circulation with respect to visitor management and animal welfare.     

Comparing King,Gentoo, and Royal Penguin Responses to Pedestrian Visitation

ABSTRACT For wildlife managers, determining inter-species differences in the behavioral responses of seabirds to visitation can allow greater efficacy of visitor guidelines. Two key management outcomes for such information include 1) tailoring visitor guidelines to protect the most sensitive species and 2) improving self-regulation during visits by identifying behaviors likely to indicate a change in the natural activity of visited species. On subantarctic Macquarie Island, Australia, I collected the behavioral responses of guarding king (Aptenodytes patagonicus), gentoo (Pygoscelis papua), and royal (Eudyptes schlegeli) penguins before, during, and after exposure to a standardized pedestrian visit, to compare species' behavioral responses to visitation. Gentoo penguins appeared more sensitive than royal or king penguins, exhibiting altered behavior for 5 minutes after the stimulus was removed; this pattern was not evident in kings or royals. Response behaviors useful for visitors to assess their impact on penguins include vigilance (repeated rapid head turning) in all 3 species, agonism in king and royal penguins (reaching and striking at conspecifics), and low threat-display (bill pointing) in gentoo penguins. This study is valuable for wildlife managers as it provides practical information in the application of on-ground visitor guidelines.     

Visitor reaction to pacing behavior: influence on the perception of animal care and interest in supporting zoological institutions

Many publications within the field of zoo animal welfare have stated the importance of decreasing stereotypic behavior (e.g., pacing) to help ensure a positive visitor experience. The idea behind these statements is that visitors want to see animals engaged in natural behavior. Additionally, it is thought that watching an animal exhibit species-appropriate behavior could help increase a visitor's connection to wildlife and ultimately their interest in conservation. However, until recently, no information was available to validate such statements. The purpose of this research was to examine people's reaction to viewing an animal engaged in pacing behavior. Participants were randomly selected to fill out a survey after watching a short video of either a tiger pacing or resting (control). Results indicate that having viewed a tiger pacing significantly decreases people's perception of the level of care animals receive at that facility. In addition, people's interest in supporting zoos decreased as a result of viewing this behavior. Results are discussed from an animal welfare, business, and conservation perspective.