| Full text | |
| Author(s): |
Bardier, C.
[1, 2]
;
Martinez-Latorraca, N.
[3]
;
Porley, J. L.
[3]
;
Bortolini, S. V.
[4]
;
Cabrera Alonzo, N.
[3]
;
Maneyro, R.
[5]
;
Toledo, L. F.
[6]
Total Authors: 7
|
| Affiliation: | [1] Inst Invest Biol Clemente Estable, Dept Ecol & Biol Evolut, Ave Italia 3318, Montevideo 11600 - Uruguay
[2] Camino Carrasco 4490-L2-05, Montevideo - Uruguay
[3] Univ Republica, Fac Ciencias, Ciencias Biol, Igua 4225, Montevideo 11400 - Uruguay
[4] Univ Republica, Fac Ciencias, Inst Ecol & Ciencias Ambientales, Igua 4225, Montevideo 11400 - Uruguay
[5] Univ Republica, Fac Ciencias, Lab Sistemat & Hist Nat Vertebrados, Igua 4225, Montevideo 11400 - Uruguay
[6] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, Lab Hist Nat Anfibios Brasileiros LaHNAB, BR-13083862 Campinas, SP - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | CANADIAN JOURNAL OF ZOOLOGY; v. 97, n. 2, p. 131-141, FEB 2019. |
| Web of Science Citations: | 0 |
| 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. (AU) | |
| FAPESP's process: | 14/23388-7 - Comunication and sensory systems of the anurans of the Atlantic Forest |
| Grantee: | Luis Felipe de Toledo Ramos Pereira |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/25358-3 - The chytrid fungus: from its origins to its consequences |
| Grantee: | Luis Felipe de Toledo Ramos Pereira |
| Support Opportunities: | Research Projects - Thematic Grants |