Ontogenia das órbitas em Pan troglodytes: implicações estruturais e funcionais.
DOI:
https://doi.org/10.24215/25456377e061Palavras-chave:
Toro Supraorbital, Crânio, Chimpanzé, Visão,Resumo
As órbitas dos primatas Haplorrhini são peculiares entre os mamíferos por serem completamente separadas da fenestra temporal e rodeadas por osso, serem convergentes, estarem frontalizadas e proporcionarem a base para o desenvolvimento de um notório toro supraorbital. Algumas destas características foram descritas como adaptações ao hábito da vida, enquanto outras como resultado de rearranjos estruturais das matrizes funcionais do crânio. O objetivo deste trabalho consiste em analisar as alterações morfológicas das órbitas em uma amostra ontogenética transversal de Pan troglodytes e sua associação com estruturas adjacentes, a fim de discutir implicações estruturais e funcionais. Foram utilizadas 52 imagens de tomografias computadorizadas de crânios de Pan troglodytes de 8 meses de vida pós-natal a adultos. Foram registrados landmarks e tomadas medidas volumétricas e lineares que permitiram extrair variáveis ??angulares e proporções. ANOVA, regressões lineares e parciais e Análise de Componentes Principais foram realizadas. Os resultados indicam que as características de valor adaptativo (funcionais) da órbita de Pan troglodytes se estabelecem no início da ontogenia e não variam durante o período pós-natal, enquanto sua relação com as estruturas adjacentes mostram alterações significativas.Referências
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