OOIR: Observatory of International Research

Papers

(The TQCC of Zoo Biology is 3. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-03-01 to 2024-03-01.)

Article	Citations
Visitor presence and a changing soundscape, alongside environmental parameters, can predict enclosure usage in captive flamingos	21
Predicting susceptibility for SARS‐CoV‐2 infection in domestic and wildlife animals using ACE2 protein sequence homology	20
An evaluation of interactive projections as digital enrichment for orangutans	18
Genetic assessment of a conservation breeding program of the houbara bustard (Chlamydotis undulata undulata) in Morocco, based on pedigree and molecular analyses	16
Effects of a recurring late‐night event on the behavior and welfare of a population of zoo‐housed gorillas	15
Inbreeding depression in sperm quality in a critically endangered amphibian	14
The effect of visitors on the behavior of zoo‐housed western lowland gorillas (Gorilla gorilla gorilla)	13
Assessing preferences of two zoo‐housed Aldabran giant tortoises (Aldabrachelys gigantea) for three stimuli using a novel preference test	12
Testing use of a potential cognitive enrichment device by an Indo‐Pacific bottlenose dolphin (Tursiops aduncus)	12
Differing animal welfare conceptions and what they mean for the future of zoos and aquariums, insights from an animal welfare audit	12
Mission impossible or mission accomplished: Do zoo organizational missions influence conservation practices?	11
Biological and environmental factors as sources of variation in nocturnal behavior of giraffe	11
Preliminary investigation of the effects of a concert on the behavior of zoo animals	10
Social and environmental impacts on sleep in captive Asian elephants (Elephas maximus)	10
Preference assessments as a tool to evaluate environmental enrichment	9
Zoo soundscape: Daily variation of low‐to‐high‐frequency sounds	9
Animal‐human two‐shot images: Their out‐of‐context interpretation and the implications for zoo and conservation settings	9
New insights into dietary management of polar bears (Ursus maritimus) and brown bears (U. arctos)	8
A retrospective analysis of mortality in captive Magellanic penguins (Spheniscus magellanicus) in the United States, 2008–2018	8
Increasing browse and social complexity can improve zoo elephant welfare	8
Recovered after an extreme bottleneck and saved by ex situ management: Lessons from the Alagoas curassow (Pauxi mitu [Linnaeus, 1766]; Aves, Galliformes, Cracidae)	8
Estrous cyclicity and reproductive success are unaffected by translocation for the formation of new reproductive pairs in captive red wolves (Canis rufus)	8
Evaluation of vitamin A gut loading in black soldier fly larvae (Hermetia illucens)	8
Increasing animal cognition research in zoos	8
In search of the optimal enrichment program for zoo‐housed animals	7

The historical development of juvenile mortality and adult longevity in zoo‐kept carnivores	7
Enrichment devices for green turtles (Chelonia mydas) reared in captivity programs	7
Psychological and social well‐being of bony fishes in zoos and aquariums	7
Monitoring great ape heart health through innovative electrocardiogram technology: Training methodologies and welfare implications	7
The impact of in‐person and video‐recorded animal experiences on zoo visitors' cognition, affect, empathic concern, and conservation intent	6
Don't use it? Don't lose it! Why active use is not required for stimuli, resources or “enrichments” to have welfare value	6
The historical development of zoo elephant survivorship	6
Bearing fruit: Piloting a novel judgment bias task in an American black bear	6
Impacts of the season and reproductive status on fecal reproductive and adrenocortical steroid metabolites in zoo Cuban crocodiles (Crocodylus rhombifer)	6
Diurnal variation in serum concentrations of cortisol in captive African (Loxodonta africana) and Asian (Elephas maximus) elephants	6
Diurnal variation of salivary cortisol in captive African elephants (Loxodonta africana) under routine management conditions and in relation to a translocation event	5
Sex‐specific actuarial and reproductive senescence in zoo‐housed tiger (Panthera tigris): The importance of sub‐species for conservation	5
Visitors' perceptions of zoo‐housed lesser anteater (Tamandua tetradactyla) welfare: Observation plays a larger role than a brief informative talk	5
Genetic assessment of captive red pandas (Ailurus fulgens) in American zoos to address management separation by putative subspecies	5
Investigating food preference in zoo‐housed meerkats	5
Effects of GnRH agonists on testosterone and testosterone‐stimulated parameters for contraception and aggression reduction in male lion‐tailed Macaques (Macaca silenus)	5
Strategies for establishing and using genome resource banks to protect genetic diversity in conservation breeding programs	5
Can colored object enrichment reduce the escape behavior of captive freshwater turtles?	5
The utility of social network analysis for informing zoo management: Changing network dynamics of a group of captive hamadryas baboons (Papio hamadryas) following an introduction of two young m	5
Fecal sex steroids and reproductive behaviors in harpy eagles (Harpia harpyja)	5
Is the natural UV zone important for successful captive propagation of the Panther Chameleon (Furcifer pardalis); are different UVB irradiance exposures that generate a similar dose equally suc	5
Evaluation of the damage caused by in vitro culture and cryopreservation to dermal fibroblasts derived from jaguars: An approach to conservation through biobanks	5
Cane toad (Rhinella marina) vitamin A, vitamin E, and carotenoid kinetics	4
Body mass and growth rates in captive chimpanzees (Pan troglodytes) cared for in African wildlife sanctuaries, zoological institutions, and research facilities	4
Natural environmental conditions and collaborative efforts provide the secret to success for sand tiger shark Carcharias taurus reproduction in aquaria	4
Zoo animals as “proxy species” for threatened sister taxa: Defining a novel form of species surrogacy	4
Individual‐level variability among trust criteria relevant to zoos and aquariums	4
Understanding sociality and behavior change associated with a nesting event in a captive flock of great white pelicans	4
Comparative nutrient analysis of four species of cockroaches used as food for insectivores by life stage, species, and sex	4
Milk composition of white rhinoceros over lactation and comparison with other Perissodactyla	4
Circulating nutrients and hematological parameters in managed African elephants (Loxodonta Africana) over a 1‐year period	4
Daily lettuce supplements promote foraging behavior and modify the gut microbiota in captive frugivores	4
Fecal progesterone and estrogen metabolite monitoring for cyclicity and pregnancy in southern tamandua (Tamandua tetradactyla)	4
Furred and feathered friends: How attached are zookeepers to the animals in their care?	4
Review of threatened Malagasy freshwater fishes in zoos and aquaria: The necessity of an ex situ conservation network—A call for action	3
Conservation medicine and One Health in zoos: Scope, obstacles, and unrecognized potential	3
Social networks research in ex situ populations: Patterns, trends, and future directions for conservation‐focused behavioral research	3
Sentinel behavior in captive meerkats (Suricata suricatta)	3
Staff perceptions of COVID‐19 impacts on wildlife conservation at a zoological institution	3
Adaptive management in a conservation breeding program: Mimicking habitat complexities facilitates reproductive success in narrow‐headed gartersnakes (Thamnophis rufipunctatus)	3
Validating the use of fecal glucocorticoid metabolite analysis to assess the adrenocortical activity of the zoo‐housed Sichuan takin (Budorcas taxicolor tibetana)	3
The perception of felid welfare by zookeepers in North America and the implications for zoo managers	3
Contextual impacts on individual and synchronous breathing rate variations in three captive odontocete groups	3
Pterygodermatites nycticebi infections in golden lion tamarins (Leontopithecus rosalia rosalia) and aye‐ayes (Daubentonia madagascariensis) from a German zoo	3
Spermatic profile of captive giant anteaters (Myrmecophaga tridactyla): Knowing more to preserve better	3
Reproductive cycles of neotropical boid snakes evaluated by ultrasound	3
Weight management towards physiological and behavioral wellbeing for chimpanzees living under human care	3
The past, present and future of hormonal contraceptive use in managed captive female tiger populations with a focus on the current use of deslorelin acetate	3
Wearing the devil down: Rate of tooth wear varies between wild and captive Tasmanian devils	3
Effects of age on sperm quality metrics in endangered Mississippi gopher frogs (Lithobates sevosus) from captive populations used for controlled propagation and reintroduction efforts	3

Colony composition and nutrient analysis of Polyrhachis dives ants, a natural prey of the Chinese pangolin (Manis pentadactyla)	3
Composition of browses consumed by Matschie's tree kangaroo (Dendrolagus matschiei) sampled from home ranges in Papua New Guinea	3
A comparison of staff presence and signage on zoo visitor behavior	3
Validation of an enzyme immunoassay for measurement of fecal dehydroepiandrosterone sulfate in gibbons and siamangs	3
Effects of Lupron and surgical castration on fecal androgen metabolite concentrations and intermale aggression in capybaras (Hydrochoerus hydrochaeris)	3
The effects of Zoo Lights on animal welfare: A case study of great Indian hornbills at Denver Zoo	3
American alligator (Alligator mississippiensis) weight gain in captivity and implications for captive reptile body condition	3
Dither: A unifying model of the effects of visitor numbers on zoo animal behavior	3