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Bhattacharjee D, Sau S, Das J, Bhadra A. Does novelty influence the foraging decisions of a scavenger? PeerJ 2024; 12:e17121. [PMID: 38525274 PMCID: PMC10961059 DOI: 10.7717/peerj.17121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 02/26/2024] [Indexed: 03/26/2024] Open
Abstract
Acquiring knowledge about the environment is crucial for survival. Animals, often driven by their exploratory tendencies, gather valuable information regarding food resources, shelter, mating partners, etc. However, neophobia, or avoiding novel environmental stimuli, can constrain their exploratory behaviour. While neophobia can reduce potential predation risks, decreased exploratory behaviour resulting from it may limit the ability to discover highly rewarding resources. Dogs (Canis familiaris) living in semi-urban and urban environments as free-ranging populations, although subject to various selection forces, typically have negligible predation pressure. These dogs are scavengers in human-dominated environments; thus, selection against object-neophobia can provide benefits when searching for novel food resources. Although captive pack-living dogs are known to be less neophobic than their closest living ancestors, wolves (Canis lupus), little is known about free-ranging dogs' behavioural responses to novel objects, particularly in foraging contexts. Using an object choice experiment, we tested 259 free-ranging dogs from two age classes, adult and juvenile, to investigate their object-neophobia in a scavenging context. We employed a between-subject study design, providing dogs with a familiar and a potentially novel object, both baited with equal, hidden food items. Adult and juvenile dogs significantly inspected the novel object first compared to the familiar one, even when the hidden food item was partially visible. To validate these findings, we compared novel objects with different strengths of olfactory cues (baited vs. false-baited) and found that they were inspected comparably by adults and juveniles. No significant differences were found in the latencies to inspect the objects, suggesting that free-ranging dogs may still be cautious when exploring their environments. These results indicate that free-ranging dogs, evidently from an early ontogenetic phase, do not show object-neophobia, as demonstrated by their preference for novel over familiar food sources. We conclude that little to no constraint of neophobia on exploratory behaviour in semi-urban and urban-dwelling animals can guide foraging decision-making processes, providing adaptive benefits.
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Affiliation(s)
- Debottam Bhattacharjee
- Centre for Animal Health and Welfare, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, SAR, Hong Kong
- The Dog Lab, Behaviour and Ecology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, SAR, Hong Kong
| | - Shubhra Sau
- The Dog Lab, Behaviour and Ecology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Jayjit Das
- The Dog Lab, Behaviour and Ecology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
- Department of Endangered Species Management, Wildlife Institute of India, Dehradun, Uttarakhand, India
| | - Anindita Bhadra
- The Dog Lab, Behaviour and Ecology Lab, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
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Müller M, Pillay N. Cognitive flexibility in urban yellow mongooses, Cynictis penicillata. Anim Cogn 2024; 27:14. [PMID: 38429567 PMCID: PMC10907452 DOI: 10.1007/s10071-024-01839-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/19/2023] [Accepted: 12/19/2023] [Indexed: 03/03/2024]
Abstract
Cognitive flexibility enables animals to alter their behaviour and respond appropriately to environmental changes. Such flexibility is important in urban settings where environmental changes occur rapidly and continually. We studied whether free-living, urban-dwelling yellow mongooses, Cynictis penicillata, in South Africa, are cognitively flexible in reversal learning and attention task experiments (n = 10). Reversal learning was conducted using two puzzle boxes that were distinct visually and spatially, each containing a preferred or non-preferred food type. Once mongooses learned which box contained the preferred food type, the food types were reversed. The mongooses successfully unlearned their previously learned response in favour of learning a new response, possibly through a win-stay, lose-shift strategy. Attention task experiments were conducted using one puzzle box surrounded by zero, one, two or three objects, introducing various levels of distraction while solving the task. The mongooses were distracted by two and three distractions but were able to solve the task despite the distractions by splitting their attention between the puzzle box task and remaining vigilant. However, those exposed to human residents more often were more vigilant. We provide the first evidence of cognitive flexibility in urban yellow mongooses, which enables them to modify their behaviour to urban environments.
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Affiliation(s)
- Mijke Müller
- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, South Africa.
| | - Neville Pillay
- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Captivity and habituation to humans raise curiosity in vervet monkeys. Anim Cogn 2021; 25:671-682. [PMID: 34855018 PMCID: PMC9107434 DOI: 10.1007/s10071-021-01589-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/29/2021] [Accepted: 11/27/2021] [Indexed: 11/25/2022]
Abstract
The cognitive mechanisms causing intraspecific behavioural differences between wild and captive animals remain poorly understood. Although diminished neophobia, resulting from a safer environment and more “free” time, has been proposed to underlie these differences among settings, less is known about how captivity influences exploration tendency. Here, we refer to the combination of reduced neophobia and increased interest in exploring novelty as “curiosity”, which we systematically compared across seven groups of captive and wild vervet monkeys (Chlorocebus pygerythrus) by exposing them to a test battery of eight novel stimuli. In the wild sample, we included both monkeys habituated to human presence and unhabituated individuals filmed using motion-triggered cameras. Results revealed clear differences in number of approaches to novel stimuli among captive, wild-habituated and wild-unhabituated monkeys. As foraging pressure and predation risks are assumed to be equal for all wild monkeys, our results do not support a relationship between curiosity and safety or free time. Instead, we propose “the habituation hypothesis” as an explanation of why well-habituated and captive monkeys both approached and explored novelty more than unhabituated individuals. We conclude that varying levels of human and/or human artefact habituation, rather than the risks present in natural environments, better explain variation in curiosity in our sample of vervet monkeys.
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Mazza V, Czyperreck I, Eccard JA, Dammhahn M. Cross-Context Responses to Novelty in Rural and Urban Small Mammals. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.661971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The Anthropocene is the era of urbanization. The accelerating expansion of cities occurs at the expense of natural reservoirs of biodiversity and presents animals with challenges for which their evolutionary past might not have prepared them. Cognitive and behavioral adjustments to novelty could promote animals’ persistence under these altered conditions. We investigated the structure of, and covariance between, different aspects of responses to novelty in rural and urban small mammals of two non-commensal rodent species. We ran replicated experiments testing responses to three novelty types (object, food, or space) of 47 individual common voles (Microtus arvalis) and 41 individual striped field mice (Apodemus agrarius). We found partial support for the hypothesis that responses to novelty are structured, clustering (i) speed of responses, (ii) intensity of responses, and (iii) responses to food into separate dimensions. Rural and urban small mammals did not differ in most responses to novelty, suggesting that urban habitats do not reduce neophobia in these species. Further studies investigating whether comparable response patters are found throughout different stages of colonization, and along synurbanization processes of different duration, will help illuminate the dynamics of animals’ cognitive adjustments to urban life.
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Harten L, Gonceer N, Handel M, Dash O, Fokidis HB, Yovel Y. Urban bat pups take after their mothers and are bolder and faster learners than rural pups. BMC Biol 2021; 19:190. [PMID: 34493290 PMCID: PMC8422611 DOI: 10.1186/s12915-021-01131-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 08/20/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Urbanization is rapidly changing our planet and animals that live in urban environments must quickly adjust their behavior. One of the most prevalent behavioral characteristics of urban dwelling animals is an increased level of risk-taking. Here, we aimed to reveal how urban fruitbats become risk-takers, and how they differ behaviorally from rural bats, studying both genetic and non-genetic factors that might play a role in the process. We assessed the personality of newborn pups from both rural and urban colonies before they acquired experience outdoors, examining risk-taking, exploration, and learning rates. RESULTS Urban pups exhibited significantly higher risk-taking levels, they were faster learners, but less exploratory than their rural counterparts. A cross-fostering experiment revealed that pups were more similar to their adoptive mothers, thus suggesting a non-genetic mechanism and pointing towards a maternal effect. We moreover found that lactating urban mothers have higher cortisol levels in their milk, which could potentially explain the transmission of some personality traits from mother to pup. CONCLUSIONS Young bats seem to acquire environment suitable traits via post-birth non-genetic maternal effects. We offer a potential mechanism for how urban pups can acquire urban-suitable behavioral traits through hormonal transfer from their mothers.
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Affiliation(s)
- Lee Harten
- School of Zoology, Faculty of Life Sciences, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Nesim Gonceer
- School of Zoology, Faculty of Life Sciences, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Michal Handel
- School of Zoology, Faculty of Life Sciences, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Orit Dash
- School of Zoology, Faculty of Life Sciences, Tel Aviv University, 69978, Tel Aviv, Israel
| | - H Bobby Fokidis
- Department of Biology, Rollins College, P.O. Box 874601, Winter Park, Florida, 32708, USA
| | - Yossi Yovel
- School of Zoology, Faculty of Life Sciences, Tel Aviv University, 69978, Tel Aviv, Israel.
- Sagol School of Neuroscience, Tel Aviv University, 69978, Tel Aviv, Israel.
- Wissenschaftskolleg zu Berlin, Berlin, Germany.
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Johnson-Ulrich L, Yirga G, Strong RL, Holekamp KE. The effect of urbanization on innovation in spotted hyenas. Anim Cogn 2021; 24:1027-1038. [PMID: 33687598 DOI: 10.1007/s10071-021-01494-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/12/2021] [Accepted: 02/16/2021] [Indexed: 02/07/2023]
Abstract
Urbanization represents a dramatic form of evolutionary novelty in the landscapes inhabited by many extant animals. The Cognitive Buffer Hypothesis suggests that innovation, the process by which animals solve novel problems or use novel behaviors, may be key for many animals when adapting to novel environments. If innovation is especially beneficial in urban environments, then we would expect urban animals to be more innovative than their non-urban counterparts. However, studies comparing innovative problem-solving between urban and rural habitats have produced mixed results. Here, we hypothesized that these findings result from comparing only two levels of urbanization when related research suggests that the stage of invasion of urban habitats likely has a strong effect on demand for innovation, with demand being highest during early establishment in a novel environment. To test this hypothesis, we assessed innovation in three locations where spotted hyenas experienced varying degrees of urbanization. Spotted hyenas are relatively innovative compared to other carnivores and, although many large carnivores in Africa are endangered, spotted hyenas remain abundant both inside and outside protected areas. We measured innovation with a multi-access puzzle box with four different doors through which hyenas could obtain a food reward. We predicted that hyenas in a transitional, rapidly urbanizing habitat would be more innovative, measured by the number of unique doors opened, than those in rural or fully urban habitats. Contrary to our predictions, hyenas in the rural habitat were the most innovative. These results challenge the idea that the evolutionary novelty associated with urbanization favors greater innovativeness.
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Affiliation(s)
- Lily Johnson-Ulrich
- Department of Integrative Biology, Michigan State University, 288 Farm Lane, Rm 203, Natural Sciences Bldg, East Lansing, MI, 48823, USA. .,Ecology, Evolutionary Biology, & Behavior Program, Michigan State University, East Lansing, MI, 48824, USA. .,Mara Hyena Project, Michigan State University, Maasai Mara National Reserve, Talek, Kenya.
| | - Gidey Yirga
- Department of Biology, Mekelle University, P.O. Box 231, Mek'ele, Ethiopia.,Theoretical and Applied Biodiversity Research, Ruhr Universität Bochum, 44780, Bochum, Germany
| | - Robyn L Strong
- Mara Hyena Project, Michigan State University, Maasai Mara National Reserve, Talek, Kenya
| | - Kay E Holekamp
- Department of Integrative Biology, Michigan State University, 288 Farm Lane, Rm 203, Natural Sciences Bldg, East Lansing, MI, 48823, USA.,Ecology, Evolutionary Biology, & Behavior Program, Michigan State University, East Lansing, MI, 48824, USA.,Mara Hyena Project, Michigan State University, Maasai Mara National Reserve, Talek, Kenya
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Individual behavioural traits not social context affects learning about novel objects in archerfish. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-02996-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Abstract
Learning can enable rapid behavioural responses to changing conditions but can depend on the social context and behavioural phenotype of the individual. Learning rates have been linked to consistent individual differences in behavioural traits, especially in situations which require engaging with novelty, but the social environment can also play an important role. The presence of others can modulate the effects of individual behavioural traits and afford access to social information that can reduce the need for ‘risky’ asocial learning. Most studies of social effects on learning are focused on more social species; however, such factors can be important even for less-social animals, including non-grouping or facultatively social species which may still derive benefit from social conditions. Using archerfish, Toxotes chatareus, which exhibit high levels of intra-specific competition and do not show a strong preference for grouping, we explored the effect of social contexts on learning. Individually housed fish were assayed in an ‘open-field’ test and then trained to criterion in a task where fish learnt to shoot a novel cue for a food reward—with a conspecific neighbour visible either during training, outside of training or never (full, partial or no visible presence). Time to learn to shoot the novel cue differed across individuals but not across social context. This suggests that social context does not have a strong effect on learning in this non-obligatory social species; instead, it further highlights the importance that inter-individual variation in behavioural traits can have on learning.
Significance statement
Some individuals learn faster than others. Many factors can affect an animal’s learning rate—for example, its behavioural phenotype may make it more or less likely to engage with novel objects. The social environment can play a big role too—affecting learning directly and modifying the effects of an individual’s traits. Effects of social context on learning mostly come from highly social species, but recent research has focused on less-social animals. Archerfish display high intra-specific competition, and our study suggests that social context has no strong effect on their learning to shoot novel objects for rewards. Our results may have some relevance for social enrichment and welfare of this increasingly studied species, suggesting there are no negative effects of short- to medium-term isolation of this species—at least with regards to behavioural performance and learning tasks.
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Gil-Sánchez JM, Aguilera-Alcalá N, Moleón M, Sebastián-González E, Margalida A, Morales-Reyes Z, Durá-Alemañ CJ, Oliva-Vidal P, Pérez-García JM, Sánchez-Zapata JA. Biases in the Detection of Intentionally Poisoned Animals: Public Health and Conservation Implications from a Field Experiment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18031201. [PMID: 33572837 PMCID: PMC7908198 DOI: 10.3390/ijerph18031201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 11/16/2022]
Abstract
Intentional poisoning is a global wildlife problem and an overlooked risk factor for public health. Managing poisoning requires unbiased and high-quality data through wildlife monitoring protocols, which are largely lacking. We herein evaluated the biases associated with current monitoring programmes of wildlife poisoning in Spain. We compared the national poisoning database for the 1990-2015 period with information obtained from a field experiment during which we used camera-traps to detect the species that consumed non-poisoned baits. Our findings suggest that the detection rate of poisoned animals is species-dependent: Several animal groups (e.g., domestic mammalian carnivores and vultures) tended to be over-represented in the poisoning national database, while others (e.g., corvids and small mammals) were underrepresented. As revealed by the GLMM analyses, the probability of a given species being overrepresented was higher for heaviest, aerial, and cryptic species. In conclusion, we found that monitoring poisoned fauna based on heterogeneous sources may produce important biases in detection rates; thus, such information should be used with caution by managers and policy-makers. Our findings may guide to future search efforts aimed to reach a more comprehensive understanding of the intentional wildlife poisoning problem.
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Affiliation(s)
- José M. Gil-Sánchez
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
| | - Natividad Aguilera-Alcalá
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
- Correspondence:
| | - Marcos Moleón
- Department of Zoology, University of Granada, Avda. de Fuente Nueva, s/n, 18071 Granada, Spain;
| | - Esther Sebastián-González
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
| | - Antoni Margalida
- Institute for Game and Wildlife Research, IREC (CSIC-UCLM-JCCM), E-13005 Ciudad Real, Spain; (A.M.); (P.O.-V.)
| | - Zebensui Morales-Reyes
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
| | - Carlos J. Durá-Alemañ
- International Center for Environmental Law Studies, CIEDA-CIEMAT, Bernardo Robles Square 9, 42002 Soria, Spain;
| | - Pilar Oliva-Vidal
- Institute for Game and Wildlife Research, IREC (CSIC-UCLM-JCCM), E-13005 Ciudad Real, Spain; (A.M.); (P.O.-V.)
- Department of Animal Science (Division of Wildlife), Faculty of Life Sciences and Engineering, University of Lleida, E-25198 Lleida, Spain
| | - Juan M. Pérez-García
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
| | - José A. Sánchez-Zapata
- Department of Applied Biology, Miguel Hernández University, Avda. de la Universidad, s/n, E-03202 Elche, Spain; (J.M.G.-S.); (E.S.-G.); (Z.M.-R.); (J.M.P.-G.); (J.A.S.-Z.)
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Schell CJ, Stanton LA, Young JK, Angeloni LM, Lambert JE, Breck SW, Murray MH. The evolutionary consequences of human-wildlife conflict in cities. Evol Appl 2021; 14:178-197. [PMID: 33519964 PMCID: PMC7819564 DOI: 10.1111/eva.13131] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 07/03/2020] [Accepted: 08/13/2020] [Indexed: 12/25/2022] Open
Abstract
Human-wildlife interactions, including human-wildlife conflict, are increasingly common as expanding urbanization worldwide creates more opportunities for people to encounter wildlife. Wildlife-vehicle collisions, zoonotic disease transmission, property damage, and physical attacks to people or their pets have negative consequences for both people and wildlife, underscoring the need for comprehensive strategies that mitigate and prevent conflict altogether. Management techniques often aim to deter, relocate, or remove individual organisms, all of which may present a significant selective force in both urban and nonurban systems. Management-induced selection may significantly affect the adaptive or nonadaptive evolutionary processes of urban populations, yet few studies explicate the links among conflict, wildlife management, and urban evolution. Moreover, the intensity of conflict management can vary considerably by taxon, public perception, policy, religious and cultural beliefs, and geographic region, which underscores the complexity of developing flexible tools to reduce conflict. Here, we present a cross-disciplinary perspective that integrates human-wildlife conflict, wildlife management, and urban evolution to address how social-ecological processes drive wildlife adaptation in cities. We emphasize that variance in implemented management actions shapes the strength and rate of phenotypic and evolutionary change. We also consider how specific management strategies either promote genetic or plastic changes, and how leveraging those biological inferences could help optimize management actions while minimizing conflict. Investigating human-wildlife conflict as an evolutionary phenomenon may provide insights into how conflict arises and how management plays a critical role in shaping urban wildlife phenotypes.
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Affiliation(s)
- Christopher J. Schell
- School of Interdisciplinary Arts and SciencesUniversity of Washington TacomaTacomaWAUSA
| | - Lauren A. Stanton
- Department of Zoology and PhysiologyUniversity of WyomingLaramieWYUSA
- Program in EcologyUniversity of WyomingLaramieWYUSA
| | - Julie K. Young
- USDA‐WS‐National Wildlife Research Center‐Predator Research FacilityMillvilleUTUSA
| | | | - Joanna E. Lambert
- Program in Environmental Studies and Department of Ecology and Evolutionary BiologyUniversity of Colorado‐BoulderBoulderCOUSA
| | - Stewart W. Breck
- USDA‐WS‐National Wildlife Research CenterFort CollinsCOUSA
- Department of Fish, Wildlife, and Conservation BiologyFort CollinsCOUSA
| | - Maureen H. Murray
- Urban Wildlife Institute and Davee Center for Epidemiology and EndocrinologyChicagoILUSA
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Urbanization is associated with differences in age class structure in black-capped chickadees (Poecile atricapillus). Urban Ecosyst 2020. [DOI: 10.1007/s11252-020-01039-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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