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Details for article 5 of 105 found articles
| Title: |
Annual variation in plasma cortisol levels in common marmosets, Callithrix jacchus |
| Author: |
Cunha, Michelle Sousa Fernandes, Luiz Carlos Vivacqua, Carla Almeida de Sousa, Maria Bernardete Cordeiro |
| Appeared in: |
Biological rhythm research |
| Paging: | Volume 38 (2007) nr. 5 pages 373-381 |
| Year: |
2007-10 |
| Contents: |
In contrast to numerous studies showing breeding seasonality for animals living in temperate zones, few have addressed the effect of annual environmental changes on hormones and behavior related to reproduction for animals living in tropical and equatorial regions. In order to expand information on other primates living near the equator, we used 13 adult common marmosets, eight males and five females living under natural climatic conditions in a colony located in North-Eastern Brazil. Blood samples were collected monthly from July 2002 to June 2004. Cortisol assays were performed by ELISA. Cortisol levels varied according to environmental temperature and rainfall but were not significantly affected by photoperiod. After separating out these environmental effects through an analysis of covariance for repeated measurements, a marginal significant difference in cortisol levels according to the seasons of the year was detected. A significant difference in cortisol levels between females and males was also observed. The results suggest that annual variation in cortisol in common marmosets is influenced by temperature and rainfall and might be associated with the mating season. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 5 of 105 found articles
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