1
|
Pacheco E, Krebs BL, Watters JV. Keeper effect: Animals are more active in the presence of their caretakers. Zoo Biol 2024. [PMID: 38602201 DOI: 10.1002/zoo.21833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/18/2024] [Indexed: 04/12/2024]
Abstract
Zookeepers are the primary caretakers of animals, providing daily care through frequent and close interactions. From the animal's perspective, most of these daily interactions are likely to have positive outcomes. With consistent and reliable interactions, a human-animal relationship is expected to develop. Our aim of this study was to investigate if the presence of the primary keeper in the public viewing area of zoo exhibits impacts the behavior of animals. We observed the behavior of 15 individuals of six species in the presence and absence of their primary keeper. Overall, we observed animals being more active in their keeper's presence than when the keeper was not present. When we considered if the keeper was nearby around times of offered opportunities to animals (e.g., feeding, enrichment, and training), our results showed that animals were equally as active when the keeper was present before an opportunity and when no opportunity was offered. These equal activity levels imply that the keeper is a cue for a forthcoming event to the animals, which reflects anticipatory behavior. Overall, we demonstrate that keeper presence is an environmental context in which animals behave differently than in keeper absence.
Collapse
Affiliation(s)
- Eridia Pacheco
- Department of Animal Science, University of California, Davis, California, USA
| | - Bethany L Krebs
- Department of Animal Wellness, San Francisco Zoological Society, San Francisco, California, USA
| | - Jason V Watters
- Department of Animal Science, University of California, Davis, California, USA
| |
Collapse
|
2
|
Bigiani S, Pilenga C. Using Anticipatory Behavior to Detect the Change in Interest in an Activity Repeated Several Times and Avoid Habituation in Bottlenose Dolphins ( Tursiops Truncatus). J APPL ANIM WELF SCI 2024; 27:343-354. [PMID: 37071774 DOI: 10.1080/10888705.2023.2203823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
Environmental enrichment is an essential component of the management policies used by zoos and aquaria to promote animals' welfare. However, when enrichments are provided several times, they can cause habituation and lose their enrichment effects. A simple method to avoid it could be making a preventive assessment about the trend of animals' interest in a stimulus provided several times. Here, we hypothesized that anticipatory behavior could be used to assess the decrease in interest in playing with objects when the activity is repeated. Moreover, we also assumed that this could be done before providing objects to play with. Our results support this hypothesis. Specifically, we found a positive correlation between the time the 7 dolphins tested spent performing anticipatory behavior before the enrichment sessions and the time they spent playing with objects during those sessions. As a result, anticipatory behavior performed before enrichment sessions predicted dolphins' interest in the session and allowed us to assess whether the sessions had lost their enrichment effect.
Collapse
|
3
|
Podturkin AA, Krebs BL, Watters JV. Quantifying animals' perception of environmental predictability using anticipatory behavior. Zoo Biol 2024; 43:125-135. [PMID: 38082553 DOI: 10.1002/zoo.21811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 11/20/2023] [Indexed: 04/10/2024]
Abstract
Animals under human care often experience predictable daily husbandry events, which can promote the development of anticipatory behavior. Previous research suggests even short delays in the arrival of a predictable, desired outcome can lead to negative welfare outcomes for animals. As such, providing reliable information to animals regarding the onset of important events may be a simple but useful method to support positive welfare. Here we evaluated the quantitative characteristics of anticipatory behavior of a California sea lion at the San Francisco Zoo in three situations (1) when the animal had accurate information about the occurrence of the event (temporally predictable training sessions), (2) when the information was semi-reliable (unscheduled training session), and (3) when a reliable signal was offered before unscheduled sessions. Results showed that providing a reliable cue resulted in a stronger temporal correlation of anticipation before the beginning of the unscheduled session, similar to the temporally predictable training session. However, providing a reliable cue did not reduce the intensity of the anticipatory behavior. We propose to take into account two aspects of the quantitative characteristics of anticipatory behavior: correlation with time until a desired event (correlation) and intensity, where the correlation indicates the ability of an individual animal to predict the occurrence of an event, and the intensity indicates the degree of sensitivity of the animal to reward. We discuss the implications for animal welfare and husbandry.
Collapse
Affiliation(s)
| | - Bethany L Krebs
- Wellness Department, San Francisco Zoo and Gardens, San Francisco, California, USA
| | - Jason V Watters
- Wellness Department, San Francisco Zoo and Gardens, San Francisco, California, USA
- Department of Animal Science, University of California Davis, Davis, California, USA
| |
Collapse
|
4
|
Gartland KN, Humbyrd M, Brightrall T, Meister B, Fuller G. Behavior of polar bear (Ursus maritimus) cubs post-den emergence at the Detroit Zoo. Zoo Biol 2024; 43:149-163. [PMID: 38214214 DOI: 10.1002/zoo.21814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 01/13/2024]
Abstract
In the wild, female polar bears (Ursus maritimus) with cubs may spend extended periods of time within the den following initial emergence. As a result, studying behavioral development of cubs at the denning site has been difficult and unreliable. Although care staff at zoological institutions have easier access to animals, every effort is made to minimize intrusions to maternal groups, which presents research limitations. Detroit Zoological Society staff used audio-equipped cameras installed in behind-the-scenes spaces to conduct approximately 9 weeks of monitoring on two female polar bear cubs of the same litter, one of whom (Laerke) was hand-reared while the other (Astra) was mother-reared. Monitoring spanned ages 14-24 weeks and consisted of 12, 5-min focal observations per observation day timed to evenly cover the entire 24-h day. Using generalized linear mixed models, we examined relationships between behavior and time of day, hour, and age. We also conducted descriptive analyses and used these to draw comparisons between the two cubs where appropriate. Despite different rearing environments, both cubs had highly comparable patterns of inactive, locomotory, and independent play behaviors. Astra generally decreased time spent nursing and in proximity to Suka as she aged. Data presented here represent a continuation of previous neonatal observations conducted on Astra, adding to the minimal body of knowledge currently available on first year polar bear cub development. We also report successful mitigation of stereotypic behavior in Laerke. Further studies of captive maternal groups can provide insight into this critical developmental stage, supporting both captive-based breeding efforts and in situ conservation efforts.
Collapse
Affiliation(s)
| | - Mary Humbyrd
- Detroit Zoological Society, Royal Oak, Michigan, USA
| | | | | | - Grace Fuller
- Detroit Zoological Society, Royal Oak, Michigan, USA
| |
Collapse
|
5
|
Going Deeper than Tracking: A Survey of Computer-Vision Based Recognition of Animal Pain and Emotions. Int J Comput Vis 2022. [DOI: 10.1007/s11263-022-01716-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AbstractAdvances in animal motion tracking and pose recognition have been a game changer in the study of animal behavior. Recently, an increasing number of works go ‘deeper’ than tracking, and address automated recognition of animals’ internal states such as emotions and pain with the aim of improving animal welfare, making this a timely moment for a systematization of the field. This paper provides a comprehensive survey of computer vision-based research on recognition of pain and emotional states in animals, addressing both facial and bodily behavior analysis. We summarize the efforts that have been presented so far within this topic—classifying them across different dimensions, highlight challenges and research gaps, and provide best practice recommendations for advancing the field, and some future directions for research.
Collapse
|
6
|
Krebs BL, Chudeau KR, Eschmann CL, Tu CW, Pacheco E, Watters JV. Space, time, and context drive anticipatory behavior: Considerations for understanding the behavior of animals in human care. Front Vet Sci 2022; 9:972217. [PMID: 36148468 PMCID: PMC9485936 DOI: 10.3389/fvets.2022.972217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/12/2022] [Indexed: 11/13/2022] Open
Abstract
Animal-based measures reflecting the welfare state of individuals are critical for ensuring the well-being of animals under human care. Anticipatory behavior is one potential animal-based measure that has gained traction in recent years, as it is theorized to relate to animals' reward sensitivity. It is of particular interest as an assessment for animals living under human care, as the predictability of the captive environment lends itself to the development of this class of behaviors. Animals are likely to exhibit anticipation in locations related to the anticipated event, often in temporally predictable time frames, and before specific contexts they experience in their day-to-day management. In this sense and under certain circumstances, anticipatory behaviors are likely to drive observed behavioral or space use patterns of animals under human care. Drawing conclusions from such data without identifying anticipation may result in misleading conclusions. Here we discuss how space, time, and context are related to patterns of anticipatory behaviors in animals under human care, how unidentified anticipation may alter conclusions regarding animal behavior or welfare under certain circumstances.
Collapse
Affiliation(s)
- Bethany L. Krebs
- Animal Wellness Department, San Francisco Zoological Society, San Francisco, CA, United States
- *Correspondence: Bethany L. Krebs
| | - Karli R. Chudeau
- Animal Science Department, University of California, Davis, CA, United States
| | - Caitlin L. Eschmann
- Animal Wellness Department, San Francisco Zoological Society, San Francisco, CA, United States
| | - Celina W. Tu
- Animal Science Department, University of California, Davis, CA, United States
| | - Eridia Pacheco
- Animal Science Department, University of California, Davis, CA, United States
| | - Jason V. Watters
- Animal Wellness Department, San Francisco Zoological Society, San Francisco, CA, United States
- Animal Science Department, University of California, Davis, CA, United States
| |
Collapse
|
7
|
Coria-Avila GA, Pfaus JG, Orihuela A, Domínguez-Oliva A, José-Pérez N, Hernández LA, Mota-Rojas D. The Neurobiology of Behavior and Its Applicability for Animal Welfare: A Review. Animals (Basel) 2022; 12:ani12070928. [PMID: 35405916 PMCID: PMC8997080 DOI: 10.3390/ani12070928] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/17/2022] [Accepted: 03/31/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Animal welfare is the result of physical and psychological well-being and is expected to occur if animals are free: (1) from hunger, thirst and malnutrition, (2) from discomfort, (3) from pain, (4) to express normal behavior, and (5) from fear and distress. Nevertheless, well-being is not a constant state but rather the result of certain brain dynamics underlying innate motivated behaviors and learned responses. Thus, by understanding the foundations of the neurobiology of behavior we fathom how emotions and well-being occur in the brain. Herein, we discuss the potential applicability of this approach for animal welfare. First, we provide a general view of the basic responses coordinated by the central nervous system from the processing of internal and external stimuli. Then, we discuss how those stimuli mediate activity in seven neurobiological systems that evoke innate emotional and behavioral responses that directly influence well-being and biological fitness. Finally, we discuss the basic mechanisms of learning and how it affects motivated responses and welfare. Abstract Understanding the foundations of the neurobiology of behavior and well-being can help us better achieve animal welfare. Behavior is the expression of several physiological, endocrine, motor and emotional responses that are coordinated by the central nervous system from the processing of internal and external stimuli. In mammals, seven basic emotional systems have been described that when activated by the right stimuli evoke positive or negative innate responses that evolved to facilitate biological fitness. This review describes the process of how those neurobiological systems can directly influence animal welfare. We also describe examples of the interaction between primary (innate) and secondary (learned) processes that influence behavior.
Collapse
Affiliation(s)
- Genaro A. Coria-Avila
- Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Avenida Luis Castelazo S/N, Col. Industrial Ánimas, Xalapa 91190, Mexico;
- Correspondence: (G.A.C.-A.); (D.M.-R.)
| | - James G. Pfaus
- Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Avenida Luis Castelazo S/N, Col. Industrial Ánimas, Xalapa 91190, Mexico;
- Department of Psychology and Life Sciences, Charles University, 182 00 Prague, Czech Republic
- Czech National Institute of Mental Health, 250 67 Klecany, Czech Republic
| | - Agustín Orihuela
- Facultad de Ciencias Agropecuarias, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Mexico;
| | - Adriana Domínguez-Oliva
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.-O.); (N.J.-P.); (L.A.H.)
| | - Nancy José-Pérez
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.-O.); (N.J.-P.); (L.A.H.)
| | - Laura Astrid Hernández
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.-O.); (N.J.-P.); (L.A.H.)
| | - Daniel Mota-Rojas
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.-O.); (N.J.-P.); (L.A.H.)
- Correspondence: (G.A.C.-A.); (D.M.-R.)
| |
Collapse
|