ArticleAnimals : an open access journal from MDPI2023
The Impact of Visitors on Non-Primate Species in Zoos: A Quantitative Review.
Article in Animals : an open access journal from MDPI, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
8 citing papers in PubMed, 30 citations in OpenAlex.
- Behavioural Welfare Implications of Human Handling Practices in Zoo Snakes.Veterinary medicine and science · 2026Article
- Unveiling welfare concerns in Japanese exotic animal cafes.The Journal of veterinary medical science · 2025Article
- The Effects of Light on Vertebrate Welfare: A Review.Animals : an open access journal from MDPI · 2025Review
- Animal-Visitor Interactions in Zoos and Aquariums: A Systematic Review.Animals : an open access journal from MDPI · 2025Review
- An Examination of Visitor and Tiger Activity Between Two Zoo Tiger Groups.Veterinary medicine and science · 2025Article
- The use of technology as environmental enrichment in zoos: A scoping review.Animal welfare (South Mimms, England) · 2025Review
- Aquarium Visitors Catch Some Rays: Rays Are More Active in the Presence of More Visitors.Animals : an open access journal from MDPI · 2023Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Visitors are a prominent feature in the lives of zoo animals, and their presence can cause a range of impacts on zoo animals (typically classed as positive, negative or neutral impacts), commonly referred to as the 'visitor effect'. This paper quantitatively collates the literature on the visitor effect in non-primate species, investigates the types of measures used to assess impacts of visitors on animals and considers whether impacts vary across non-primate species in zoos. In total, there were 105 papers which had investigated the impact of zoo visitors on 252 non-primate species/species groups. There has been a steady increase in visitor effect research in zoos since 2012 and this body of work incorporates species from avian (28% study species), reptilian (9%), amphibian (2%), fish (4%) and invertebrate taxa (1%). However, there is still a bias towards mammalian species (56%). The response to visitors varied across taxa. Amphibians responded negatively to visitors more frequently than would be expected by chance (
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.