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Yuan ML, Jung C, Bell RC, Nelson JL. Aposematic patterns shift continuously throughout the life of poison frogs. J Zool (1987) 2022. [DOI: 10.1111/jzo.12977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. L. Yuan
- Center for Population Biology University of California Davis CA USA
- Department of Evolution and Ecology University of California Davis CA USA
| | - C. Jung
- Department of Environmental Science, Policy, and Management University of California Berkeley CA USA
| | - R. C. Bell
- Department of Herpetology California Academy of Sciences San Francisco CA USA
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Bardier C, Martínez-Latorraca N, Porley J, Bortolini S, Cabrera Alonzo N, Maneyro R, Toledo L. Seasonal demography of the threatened Montevideo Redbelly Toad ( Melanophryniscus montevidensis) in a protected area of Uruguay. CAN J ZOOL 2019. [DOI: 10.1139/cjz-2017-0362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Estimates of demographic parameters are scarce for Neotropical amphibians, a concerning fact because this region has the highest proportion of threatened amphibians in the world. We conducted a 3-year study where we applied a robust capture–mark–recapture design to assess the importance of breeding and non-breeding activity patterns over the survival rates, detection probabilities, and abundances of the Montevideo Redbelly Toad (Melanophryniscus montevidensis (Philippi, 1902)), a threatened anuran from Uruguay. The best models grouped seasons into hot and cold periods cyclically, were state-dependent in transition probabilities, and were time-dependent in detection probabilities for adults, but had constant detection probabilities for juveniles. Averaged estimates suggest a high survivorship rate during cold seasons (above 80%), but lower probabilities (below 60%) during hot seasons, especially for males. Analogously, the non-breeding activity had a seasonal pattern, with higher activity during spring and higher sheltering rates during autumn. These activity rates negatively influenced the averaged survivorship rates of adult males and females. Long-term (matrix) projections of seasonal survivorships, along with assessments of the causes of these patterns, should be carried out to determine extinction probabilities and possible threats for the conservation of the genus Melanophryniscus.
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Affiliation(s)
- C. Bardier
- Departamento de Ecología y Biología Evolutiva, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia 3318, Montevideo 11600, Uruguay
| | - N. Martínez-Latorraca
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - J.L. Porley
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - S.V. Bortolini
- Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - N. Cabrera Alonzo
- Licenciatura en Ciencias Biológicas, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - R. Maneyro
- Laboratorio de Sistemática e Historia Natural de Vertebrados, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay
| | - L.F. Toledo
- Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo 13083-862, Brazil
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