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de Amaral M, Von Dentz MC, Ressel Simões LA, Vogt É, Heiermann D, Fischer P, Colombo P, Kucharski LC. Metabolic changes in the subtropical frog Boana pulchella during experimental cooling and recovery conditions. J Therm Biol 2023; 117:103705. [PMID: 37714110 DOI: 10.1016/j.jtherbio.2023.103705] [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: 02/01/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/17/2023]
Abstract
Frogs have developed biochemical and physiological adaptations to occupy diverse ecological niches on Earth successfully. Survival in frozen states is a fascinating strategy made possible by evolving adaptations to produce cryoprotectant solutes. The hylid frog Boana pulchella thrives in South American regions with cold climates, remaining active while enduring sporadic subzero temperatures during winter. The species' metabolic changes during subzero exposure remain unclear. Therefore, we exposed B. pulchella to cooling and recovery, assessing plasma and tissue metabolite changes. Cooling significantly reduced urea concentrations in plasma (P = 0.033), muscle (P = 0.001), heart (P = 0.009), and brain (P = 0.041) compared to acclimation. Liver glucose oxidation and glycogen synthesis were lower in cooling and recovery than in acclimation (P < 0.0001 and P = 0.0117, respectively). Muscle glycogen synthesis was lower in recovery than acclimation (P = 0.0249). These results demonstrate B. pulchella's physiological strategies during subzero exposure, likely reflecting species-specific evolutionary adaptations for brief subzero exposures that enable winter survival in its natural habitat.
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Affiliation(s)
- Marjoriane de Amaral
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Maiza Cristina Von Dentz
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Leonardo Airton Ressel Simões
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Éverton Vogt
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Dener Heiermann
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Pedro Fischer
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Patrick Colombo
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Luiz Carlos Kucharski
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
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Ergül Kalaycı T, Gümüşsoy K. Age Structure, Growth, and Body Size of Pelodytes caucasicus from Turkey. BIOL BULL+ 2022. [DOI: 10.1134/s1062359022130088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cogălniceanu D, Dorel R, Plăiaşu R, Palmer MW. Out in the Cold: Trophic Resource Use by the Common Frog (Rana temporaria) Populations Inhabiting Extreme Habitats. ANN ZOOL FENN 2018. [DOI: 10.5735/086.055.0608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Dan Cogălniceanu
- University Ovidius Constanţa, Faculty of Natural Sciences and Agricultural Sciences, Al. Universităţii 1, corp B, RO-900740 Constanţa, Romania
- Chelonia Romania, Pascani 5, sector 6, RO-062082 Bucharest, Romania
| | - Ruşti Dorel
- Bistriţa-Năsăud Water Management System, Avram Iancu 9, RO-420029 Bistriţa, Romania
| | - Rodica Plăiaşu
- Chelonia Romania, Pascani 5, sector 6, RO-062082 Bucharest, Romania
- Institute of Speleology Emil Racoviță, Romanian Academy, Calea 13 Septembrie 13, RO-050711 Bucharest, Romania
| | - Michael W. Palmer
- Department of Plant Biology, Ecology, and Evolution, Oklahoma State University, 301 Physical Sciences, Stillwater, OK 74078-3013, USA
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