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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Does the rattle of Crotalus durissus terrificus reveal its dietary history?

Texto completo
Autor(es):
Martinez, Melissa Gaste [1] ; Ducatti, Carlos [2] ; Silva, Evandro Tadeu [2] ; St Anna, Savio Stefanini [3] ; Pereira Sartori, Maria Marcia [2] ; Barraviera, Benedito [1, 4, 5]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ, UNESP Univ Estadual Paulista, Ctr Study Venoms & Venomous Anim, Botucatu, SP - Brazil
[2] Sao Paulo State Univ, UNESP Univ Estadual Paulista, Botucatu Biosci Inst, Stable Isotopes Ctr CIE, Botucatu, SP - Brazil
[3] Butantan Inst, Lab Herpetol, Sao Paulo - Brazil
[4] Sao Paulo State Univ, UNESP Univ Estadual Paulista, Botucatu Med Sch, Botucatu, SP - Brazil
[5] CEVAP UNESP, BR-18610307 Botucatu, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Journal of Venomous Animals and Toxins including Tropical Diseases; v. 20, DEC 9 2014.
Citações Web of Science: 5
Resumo

Background: Environmental devastation threatens the survival of many species, including venomous snakes such as the South American rattlesnake Crotalus durissus terrificus. This observation is based on the decrease of snakes collected and donated to Brazilian research institutes. Nevertheless, some individuals have managed to survive and procreate. The question is how these snakes are adapting in these new environmental conditions. Methods: To answer it, the carbon-13 level of rattlesnakes and their feed (either laboratory or wild mice) was evaluated by isotope-ratio mass spectrometry. Thus, rattle segments from 16 adults and 15 offspring of captive snakes, and of three wild newborn C. d. terrificus were evaluated as well as 17 Mus musculus mice captured in traps, four live feeder mice and the ration offered to mice at animal houses. Results: The isotopic exchange time of the captive adult snakes (n = 16) varied between 33 and 37 months and of captive-born animals (n = 15), until reaching a plateau of equilibrium, varied from 18 to 24 months. Regarding the captured Mus musculus (n = 17), 88.23% (n = 15) were from a C-4 environment. Of the six rattle rings from offspring of captured C. d. terrificus, five were from a C-4 environment, whereas of the 170 rattle rings studied, 60% originated from a C-3 environment and 40% from a C-4. The same carbon-13 values were found in captive snakes. Conclusions: Based on the present results, it can be inferred that most C. d. terrificus snakes (60%) fed animals from a C-3 environment; birds consist of an alimentary alternative for snakes, as well as rodents, small reptiles and amphibians; different venom compositions among snakes from the same region may be related to the food type; the primary rattle of offspring reflects the maternal diet during gestation; and, finally, the different rattle rings indicate the alimentary history of these animals. (AU)

Processo FAPESP: 07/05159-7 - Isolamento de serino-proteases coagulantes dos venenos de Bothrops neuwiedi pauloensis e Crotalus durissus terrificus: caracterização funcional e estrutural
Beneficiário:Benedito Barraviera
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 08/57411-4 - Isótopos estáveis ambientais em zootecnia
Beneficiário:Carlos Ducatti
Linha de fomento: Auxílio à Pesquisa - Temático