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Chromosomal variations in the primate Alouatta seniculus seniculus
Folia Primatologica; International Journal of Primatology
|January 1, 1976
Summary
Chromosome analysis of Alouatta s. seniculus revealed variations in chromosome number and structure. The study identified numerical variations and a pericentric inversion in chromosome 13, alongside a smaller X chromosome.
Area of Science:
- Genetics
- Zoology
- Primate Biology
Background:
- Alouatta s. seniculus, the brown howler monkey, is a Neotropical primate species.
- Understanding primate karyotypes is crucial for evolutionary and conservation studies.
Purpose of the Study:
- To analyze the chromosomal characteristics of Alouatta s. seniculus from Colombia.
- To identify any numerical or structural chromosomal variations within the species.
Main Methods:
- Chromosome analysis using C- and Q-banding techniques.
- Examination of 23 specimens of Alouatta s. seniculus.
- Karyotyping and chromosome measurement.
Main Results:
- Chromosome numbers varied from 2n=43 to 2n=45, involving microchromosomes.
- Two specimens exhibited a pericentric inversion in chromosome 13.
- The X chromosome was significantly smaller than the standard mammalian X chromosome.
Conclusions:
- Alouatta s. seniculus exhibits chromosomal variability.
- These findings contribute to the cytogenetic understanding of howler monkeys.
- Further research may explore the evolutionary implications of these chromosomal variations.