| Full text | |
| Author(s): |
Mailho-Fontana, Pedro Luiz
[1]
;
Titon, Braz
[2]
;
Antoniazzi, Marta Maria
[1]
;
Gomes, Fernando Ribeiro
[2]
;
Jared, Carlos
[1]
Total Authors: 5
|
| Affiliation: | [1] Inst Butantan, Lab Biol Estrutural, Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Biociencias, Dept Fisiol Geral, Sao Paulo - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | ACTA ZOOLOGICA; v. 103, n. 1, p. 112-128, JAN 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
Toads are considered poisonous animals since they have a passive mode of defence relying on cutaneous poison glands, differently from venomous animals who can inject venom in predators/aggressors or prey. Toads of Rhinella marina group are generally large and have a broad distribution in South America, inhabiting a wide range of environments. In this paper, we studied the toads Rhinella icterica from the Atlantic rainforest, and Rhinella jimi from the Brazilian Semiarid Caatinga, analysing aspects of natural history and comparing their skin morphology, the presence of macroglands, their resistance to water loss and rates of water uptake. In periods of extreme drought, R. jimi uses rock cracks as refuges, exposing only the head and regions of accumulation of poison glands. The skin of R. jimi showed higher number of poison glands with hydrophilic content than R. icterica. R. jimi also had a thicker skin, which can be related to its superior resistance to water loss. It also showed high rates of rehydration in association with a peculiar behaviour using the limbs to spread water onto highly glandular skin areas, suggesting that poison glands may also act in water balance in addition to chemical defence. (AU) | |
| FAPESP's process: | 17/10488-1 - Parental care and skin feeding in the caecilian Siphonops annulatus: an integrative approach |
| Grantee: | Pedro Luiz Mailho Fontana |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| FAPESP's process: | 14/15334-4 - The skin and the defense of toads (Bufonidae) against predators and desiccation |
| Grantee: | Pedro Luiz Mailho Fontana |
| Support type: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 10/16804-3 - Water balance and locomotor performance in Bufonids inhabiting thermal and hygric contrasting biomes |
| Grantee: | Braz Titon Junior |
| Support type: | Scholarships in Brazil - Doctorate |