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Previous issue date: 2010-10-08 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Considering the constant environmental changes, the ability to introduce new
food items in the diet is crucial to omnivore animal survival. For optimal nourishment
and lessening of intoxication risks, the animals must detect signs that indicate which
items are adequate for their intake. We investigate some factors that interfere in the
responses to non familiar food, modulating their neophobic behavior, of marmosets
Callithrix jacchus, an omnivore and generalist primate, native to Northeast Brazil,
known for being cautious in ingesting not known food. We analyzed the influence of
food taste (sweet or salty), pregnancy and sex in feeding behavior and neophobic
responses in these animals. 10 captive females were first selected, 5 of them being then
pregnant. The females, pregnant or not, ate more when presented to the sweet items
than to the salty ones. Pregnant females, however, themselves were less neophobic to
both tastes, being also strongly neophilic to the sweets. We verified then the influence
of nourishment during pregnancy on young males and females post natal feeding
behavior. We observed 10 young divided in two groups, one whose mother ate that
food item during pregnancy and one whose mother had no contact to it. In the first
group that food was more easily accepted by the young, suggesting that neofobia and
feeding behavior had a pre natal influence. Female young also ingested more food and
were less neophobic than males, a difference already observed in behavior of adults of
these specie. These results suggest that the low neophobic behavior to sweet food
showed by females can be adaptive, and might have bestowed more fitness to those
who presented it / Considerando as constantes mudan?as ambientais, a capacidade de introduzir
alimentos novos na dieta ? essencial para a sobreviv?ncia de animais on?voros. Para a
otimiza??o do forrageio e diminui??o dos riscos de intoxica??o, ? necess?rio ao animal
detectar sinais que indiquem quais itens s?o adequados ou n?o para o consumo.
Investigamos alguns fatores que interferem na resposta aos alimentos n?o familiares,
modulando comportamentos neof?bicos em sag?is Callithrix jacchus, primatas nativos
do nordeste brasileiro, animais on?voros e generalistas, por?m cautelosos na ingest?o
de itens desconhecidos. Foi analisada a influ?ncia da qualidade gustativa dos alimentos
(doce e salgado), da gesta??o, e do sexo no comportamento alimentar e na resposta
neof?bica desses animais. Selecionamos inicialmente 10 f?meas de origem cativa,
sendo cinco gr?vidas e cinco n?o. As f?meas apresentadas aos itens doces ingeriram
maior quantidade do que aquelas apresentadas ao item salgado, estando ou n?o
gestantes. Contudo, f?meas gr?vidas se mostraram menos neof?bicas para ambos os
alimentos, embora demonstrassem forte neofilia para os doces. Verificamos ent?o a
influ?ncia da alimenta??o das gr?vidas no comportamento alimentar p?s-natal de seus
filhotes f?meas e machos. Observamos 10 filhotes: um grupo cuja m?e teve contato
com o alimento na gesta??o e um cuja m?e n?o tivera esse contato. No primeiro grupo
o alimento foi mais facilmente aceito pelos filhotes, sugerindo que a neofobia e a
prefer?ncia alimentar possuam influ?ncia pr?-natal. Al?m disso, filhotes f?meas
ingeriram mais alimentos e mostraram-se menos neof?bicas que filhotes machos,
diferen?a j? observada em adultos da mesma esp?cie. Nossos resultados sugerem que
o comportamento de baixa neofobia aos alimentos doces apresentado pelas f?meas
possa ser adaptativo, e tenha conferido uma maior aptid?o ?quelas que o
apresentassem
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17311 |
| Date | 08 October 2010 |
| Creators | Engelmann, Cristiana |
| Contributors | CPF:91566088453, http://lattes.cnpq.br/2583445528542625, Mendes, Francisco Dyonisio Cardoso, CPF:08244745894, http://lattes.cnpq.br/7396049661058589, Miranda, Maria de F?tima Arruda de, CPF:09453997404, http://lattes.cnpq.br/4654421846443562, Lopes, F?via de Ara?jo |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Psicobiologia, UFRN, BR, Estudos de Comportamento; Psicologia Fisiol?gica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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