Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians
Body temperatures of 13 Paleosuchus palpebrosus, 7 males and 6 females, were monitored by radio-telemetry during cold periods (dry season) and warm periods (wet and dry seasons) in a stream draining into the Brazilian Pantanal. The mass of the caimans varied from 2.5 to 20.0. kg, and snout-vent leng...
| Autor principal: | Campos, Zilca M.S. |
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| Outros Autores: | Magnusson, William Ernest |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Thermal Biology
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17933 |
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oai:repositorio:1-17933 |
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dspace |
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oai:repositorio:1-17933 Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians Campos, Zilca M.S. Magnusson, William Ernest Adaptation Air Temperature Animals Experiment Anthropometric Parameters Body Mass Body Temperature Monitoring Brasil Burrowing Species Caiman Controlled Study Dwarfism Ecological Niche Environmental Temperature Female Male Nonhuman Paleosuchus Palpebrosus Physical Tolerance Seasonal Variation Snout Vent Length Telemetry Thermoregulation Water Temperature Alligators And Crocodiles Animal Body Temperature Female Male Rivers Seasons Sex Factors Temperature Caiman Crocodylidae (all Crocodiles) Paleosuchus Paleosuchus Palpebrosus Body temperatures of 13 Paleosuchus palpebrosus, 7 males and 6 females, were monitored by radio-telemetry during cold periods (dry season) and warm periods (wet and dry seasons) in a stream draining into the Brazilian Pantanal. The mass of the caimans varied from 2.5 to 20.0. kg, and snout-vent length from 47.5 to 95.0. cm. Mean monthly body temperature was 21.6 °C, and varied from 20.1 to 25.6 °C throughout the year. Body temperature was correlated with air and water temperature but did not differ between males and females. Unlike all other crocodilians investigated in detail to date, the caimans did not show evidence of attempts to obtain higher body temperatures when ambient temperatures were low, and had low and generally constant temperatures in relation to the surrounding air and water throughout the year. The caimans remained in burrows during cold periods in the dry season, which may explain why they did not seek higher temperatures. Tolerance of relatively low and constant body temperatures may be a key adaptation of species of Paleosuchus, allowing them to occupy environments inhospitable to other crocodilians. © 2012 Elsevier Ltd. 2020-06-15T21:50:13Z 2020-06-15T21:50:13Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/17933 10.1016/j.jtherbio.2012.09.004 en Volume 38, Número 1, Pags. 20-23 Restrito Journal of Thermal Biology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Adaptation Air Temperature Animals Experiment Anthropometric Parameters Body Mass Body Temperature Monitoring Brasil Burrowing Species Caiman Controlled Study Dwarfism Ecological Niche Environmental Temperature Female Male Nonhuman Paleosuchus Palpebrosus Physical Tolerance Seasonal Variation Snout Vent Length Telemetry Thermoregulation Water Temperature Alligators And Crocodiles Animal Body Temperature Female Male Rivers Seasons Sex Factors Temperature Caiman Crocodylidae (all Crocodiles) Paleosuchus Paleosuchus Palpebrosus |
| spellingShingle |
Adaptation Air Temperature Animals Experiment Anthropometric Parameters Body Mass Body Temperature Monitoring Brasil Burrowing Species Caiman Controlled Study Dwarfism Ecological Niche Environmental Temperature Female Male Nonhuman Paleosuchus Palpebrosus Physical Tolerance Seasonal Variation Snout Vent Length Telemetry Thermoregulation Water Temperature Alligators And Crocodiles Animal Body Temperature Female Male Rivers Seasons Sex Factors Temperature Caiman Crocodylidae (all Crocodiles) Paleosuchus Paleosuchus Palpebrosus Campos, Zilca M.S. Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| topic_facet |
Adaptation Air Temperature Animals Experiment Anthropometric Parameters Body Mass Body Temperature Monitoring Brasil Burrowing Species Caiman Controlled Study Dwarfism Ecological Niche Environmental Temperature Female Male Nonhuman Paleosuchus Palpebrosus Physical Tolerance Seasonal Variation Snout Vent Length Telemetry Thermoregulation Water Temperature Alligators And Crocodiles Animal Body Temperature Female Male Rivers Seasons Sex Factors Temperature Caiman Crocodylidae (all Crocodiles) Paleosuchus Paleosuchus Palpebrosus |
| description |
Body temperatures of 13 Paleosuchus palpebrosus, 7 males and 6 females, were monitored by radio-telemetry during cold periods (dry season) and warm periods (wet and dry seasons) in a stream draining into the Brazilian Pantanal. The mass of the caimans varied from 2.5 to 20.0. kg, and snout-vent length from 47.5 to 95.0. cm. Mean monthly body temperature was 21.6 °C, and varied from 20.1 to 25.6 °C throughout the year. Body temperature was correlated with air and water temperature but did not differ between males and females. Unlike all other crocodilians investigated in detail to date, the caimans did not show evidence of attempts to obtain higher body temperatures when ambient temperatures were low, and had low and generally constant temperatures in relation to the surrounding air and water throughout the year. The caimans remained in burrows during cold periods in the dry season, which may explain why they did not seek higher temperatures. Tolerance of relatively low and constant body temperatures may be a key adaptation of species of Paleosuchus, allowing them to occupy environments inhospitable to other crocodilians. © 2012 Elsevier Ltd. |
| format |
Artigo |
| author |
Campos, Zilca M.S. |
| author2 |
Magnusson, William Ernest |
| author2Str |
Magnusson, William Ernest |
| title |
Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| title_short |
Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| title_full |
Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| title_fullStr |
Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| title_full_unstemmed |
Thermal relations of dwarf caiman, Paleosuchus palpebrosus, in a hillside stream: Evidence for an unusual thermal niche among crocodilians |
| title_sort |
thermal relations of dwarf caiman, paleosuchus palpebrosus, in a hillside stream: evidence for an unusual thermal niche among crocodilians |
| publisher |
Journal of Thermal Biology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17933 |
| _version_ |
1787141631110021120 |
| score |
11.680425 |