Dieta do Plecturocebus cinerascens (Platyrrhini: Primates): a influência da composição química na escolha de frutos consumidos
Plants protect themselves against herbivores in many mechanical and chemical defense mechanisms. Much of the secondary metabolites that plants produce, e.g. tannins and alkaloids, have been shown to deter herbivores. It is possible that the amount of ingested mass of fruits consumed by Plecturoce...
| Autor principal: | Mattos, Fábio de Souza |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11998 http://lattes.cnpq.br/2437118650633319 |
| Resumo: |
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Plants protect themselves against herbivores in many mechanical and
chemical defense mechanisms. Much of the secondary metabolites that plants
produce, e.g. tannins and alkaloids, have been shown to deter herbivores. It is
possible that the amount of ingested mass of fruits consumed by Plecturocebus
cinerascens (Platyrrhini: Pitheciidae) is lower depending on the concentration and
type of secondary metabolites (tannins and alkaloids) contained in the fruits. My
fieldwork was carried out in the area of the Rondon II Hydroelectric Power Plant,
Pimenta Bueno, Rondônia State, Brazil. In order to record the species of fruit
consumed by P. cinerascens, I searched the animals at seven different sites, each
site being the living area of a distinct Ashy titi monkey group. Once I registered the
feed of a certain group of Ashy titis, I was searching for a different group in order to
avoid sample pseudo-repetition. I collected fruit samples to perform chemical
analysis in all plants in the fruiting stage where the animals were fed. The chemical
analysis was performed both in the consumed parts and in the unconsumed parts of
the fruits. The results of the multiple regression did not show a relation between the
concentration of secondary metabolites and the weight of the freshy mass of the
fruits consumed by Ashy titi monkeys. However, the animals discarded the parts of
the fruits in the only plant species (Amorimia [Mascagnia] rigida [Malpighiaceae] and
Inga sp. [Fabaceae: Mimosoideae]) that presented alkaloids. I conclude that the diet
of P. cinerascens is not influenced by secondary metabolites (e.g. tannins and
alkaloids) and indicates a broader investigation of the chemical composition of food
items that P. cinerascens consumes to evaluate if other chemical compounds, not
evaluated in this study (e.g. proteins, lipids, sugars and others), influence the diet of
these primates. |