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Liao S, Tan S, Jiang M, Wen J, Liu J, Cao J, Li M, Zhao Z. Temperature determines the shift of thermal neutral zone and influences thermogenic capacity in striped hamsters. Integr Zool 2023; 18:353-371. [PMID: 36056589 DOI: 10.1111/1749-4877.12678] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The thermoneutral zone (TNZ) reflects the adaptation of mammals to their natural habitat. However, it remains unclear how TNZ shifts in response to variations in ambient temperature. To test the hypothesis that ambient temperature plays a key role in determining TNZ variations between seasons, we measured metabolic rate, body temperature, and cytochrome c oxidase (COX) activity of several visceral organs in striped hamsters (Cricetulus barabensis) either acclimated to semi-natural conditions over a year, or subjected to a gradual decrease in mean temperature from 30 ± 1°C to -15 ± 1°C. The TNZ range in striped hamsters differed seasonally, with a wider TNZ and a lower lower-critical temperature in winter compared to summer. The hamsters showed a considerable leftward shift of lower-critical temperature from 30°C to 20°C after the ambient temperature of acclimation from 30°C down to -15°C, whereas the upper-critical temperature of TNZ remained fixed at 32.5°C. The resting metabolic rate in thermoneutral zone (RMRt), nonshivering thermogenesis (NST), and COX activity of brown adipose tissue, liver, skeletal muscle, brain, and kidneys, increased significantly in hamsters acclimated at lower ambient temperatures. Following acute exposure to 5°C and -15°C, hamsters acclimated to 32.5°C had significantly lower maximal NST and lower serum thyroid tri-iodothyronine (T3 ) levels compared to those kept at 23°C. These findings suggest that acclimation to the upper-critical temperature of TNZ impairs the hamsters' thermogenic capacity to cope with extreme cold temperature. Reduced ambient temperature was mainly responsible for the leftward shift of TNZ in striped hamsters, which reflects the adaptation to cold environments.
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Affiliation(s)
- Shasha Liao
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Song Tan
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China.,CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Meizhi Jiang
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Jing Wen
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Jinsong Liu
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Jing Cao
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Ming Li
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China
| | - Zhijun Zhao
- College of Life and Environmental Science, Wenzhou University, Wenzhou, China.,Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, China
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Xenarthra richness and activity pattern in the Brazilian Amazon. Mamm Biol 2023. [DOI: 10.1007/s42991-022-00342-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Ascensão F, Ribeiro YGG, Campos Z, Yogui DR, Desbiez ALJ. Forecasting seasonal peaks in roadkill patterns for improving road management. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 321:115903. [PMID: 35973292 DOI: 10.1016/j.jenvman.2022.115903] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/22/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
For several species, roadkill is not spatially aggregated on hotspots, having instead a more diffuse pattern along the roads. For such species, management measures such as road passages may be insufficient for effective mitigation, since a large part of the road crossings is likely to occur outside the influence of those structures. One complementary approach could be to implement temporary mitigation actions, such as traffic calming. This requires understanding when roadkill peaks may occur. We tested the feasibility of predicting seasonal peaks of roadkill using data from a 3-year systematic monitoring (78 surveys over ca. 960 km of roads) from eight non-flying vertebrate species from Mato Grosso do Sul, Brazil, with different body size and life history traits (ca. 6400 records from focal species). We modelled the time-series of the roadkill of these species at large scale (state level) using generalized additive mixed models (GAMMs). We used the data of the first 2 years as training datasets, and the information from the third year of surveys as testing datasets to evaluate the prediction performance of models. Overall, the models of species feed with a higher number of records were able to follow reasonably well the variations of roadkill over time, although they were not able to correctly predict the number of collisions. For species with fewer observations, the models presented a poorer goodness-of-fit and prediction ability. Our results suggest that, at least for those species with higher roadkill rates, it can be possible to forecast periods of higher probability of occurring hot-moments of mortality. Such models can provide valuable information to implement seasonal management actions.
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Affiliation(s)
- Fernando Ascensão
- cE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Institute for Global Changes and Sustainability, Faculdade de Ciências da Universidade de Lisboa. Campo Grande, 1749-016 Lisbon, Portugal; Instituto de Conservação de Animais Silvestres (ICAS), Rua Licuala 622, 79046150, Campo Grande, Mato Grosso do Sul, Brazil.
| | - Yuri Geraldo Gomes Ribeiro
- Instituto de Conservação de Animais Silvestres (ICAS), Rua Licuala 622, 79046150, Campo Grande, Mato Grosso do Sul, Brazil
| | - Zilca Campos
- Laboratório de Vida Selvagem - Embrapa Pantanal, Corumbá, Mato Grosso do Sul, Brazil
| | - Débora Regina Yogui
- Instituto de Conservação de Animais Silvestres (ICAS), Rua Licuala 622, 79046150, Campo Grande, Mato Grosso do Sul, Brazil
| | - Arnaud L J Desbiez
- Instituto de Conservação de Animais Silvestres (ICAS), Rua Licuala 622, 79046150, Campo Grande, Mato Grosso do Sul, Brazil
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Giroux A, Ortega Z, Oliveira-Santos LGR, Attias N, Bertassoni A, Desbiez ALJ. Sexual, allometric and forest cover effects on giant anteaters' movement ecology. PLoS One 2021; 16:e0253345. [PMID: 34407068 PMCID: PMC8372905 DOI: 10.1371/journal.pone.0253345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/02/2021] [Indexed: 11/23/2022] Open
Abstract
Knowing the influence of intrinsic and environmental traits on animals’ movement is a central interest of ecology and can aid to enhance management decisions. The giant anteater (Myrmecophaga tridactyla) is a vulnerable mammal that presents low capacity for physiological thermoregulation and uses forests as thermal shelters. Here, we aim to provide reliable estimates of giant anteaters’ movement patterns and home range size, as well as untangle the role of intrinsic and environmental drivers on their movement. We GPS-tracked 19 giant anteaters in Brazilian savannah. We used a continuous-time movement model to estimate their movement patterns (described by home range crossing time, daily distance moved and directionality), and provide an autocorrelated kernel density estimate of home range size. Then, we used mixed structural equations to integratively model the effects of sex, body mass and proportion of forest cover on movement patterns and home range size, considering the complex net of interactions between these variables. Male giant anteaters presented more intensive space use and larger home range than females with similar body mass, as it is expected in polygynous social mating systems. Males and females increased home range size with increasing body mass, but the allometric scaling of intensity of space use was negative for males and positive for females, indicating different strategies in search for resources. With decreasing proportion of forest cover inside their home ranges, and, consequently, decreasing thermal quality of their habitat, giant anteaters increased home range size, possibly to maximize the chances of accessing thermal shelters. As frequency and intensity of extreme weather events and deforestation are increasing, effective management efforts need to consider the role of forests as an important thermal resource driving spatial requirements of this species. We highlight that both intrinsic and environmental drivers of animal movement should be integrated to better guide management strategies.
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Affiliation(s)
- Aline Giroux
- Ecology Department, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Brazil
- * E-mail:
| | - Zaida Ortega
- Ecology Department, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Brazil
- Zoology Department, University of Granada, Granada, Granada, Spain
| | | | - Nina Attias
- Institute for the Conservation of Wild Animals (ICAS), Campo Grande, Mato Grosso do Sul, Brazil
| | - Alessandra Bertassoni
- Ecology and Evolution Department, Federal University of Goiás (UFG), Goiânia, Goiás, Brazil
- Institute for Research and Conservation of Tamanduas in Brazil (Tamanduá Institute), Parnaíba, Piauí, Brazil
| | - Arnaud Léonard Jean Desbiez
- Institute for the Conservation of Wild Animals (ICAS), Campo Grande, Mato Grosso do Sul, Brazil
- Institute for Ecological Research (IPÊ), Nazaré Paulista, São Paulo, Brazil
- Royal Zoological Society of Scotland (RZSS), Murrayfield, Edinburgh, United Kingdom
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Noonan MJ, Ascensão F, Yogui DR, Desbiez ALJ. Roads as ecological traps for giant anteaters. Anim Conserv 2021. [DOI: 10.1111/acv.12728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. J. Noonan
- The Irving K. Barber Faculty of Science The University of British Columbia Kelowna BC Canada
| | - F. Ascensão
- Faculdade de Ciências Centre for Ecology, Evolution and Environmental Changes (cE3c) Universidade de Lisboa Lisboa Portugal
| | - D. R. Yogui
- Instituto de Conservação de Animais Silvestres (ICAS) Mato Grosso do Sul Brazil
- Nashville Zoo Nashville TN USA
| | - A. L. J. Desbiez
- Instituto de Conservação de Animais Silvestres (ICAS) Mato Grosso do Sul Brazil
- Instituto de Pesquisas Ecológicas (IPÊ) São Paulo Brazil
- Royal Zoological Society of Scotland (RZSS) Edinburgh UK
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