Words similar to opossums
Example sentences for: opossums
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The onset of puberty in female opossums is strongly influenced by pheromonal and, perhaps, other social cues.
This suggests that age at first estrus varied from 109 to 162 days, depending on pheromone exposure [ 7 ] . However, body mass at first estrus was remarkably close to 60 g in all females, indicating that puberty in opossums, as in most mammals, is dependent on attainment of a threshold body mass.
67 mm) in superovulated opossums [ 22 ] . This increased size of developing follicles in exposed opossums is similar in magnitude to that seen in the pre-Graafian follicles of rats between diestrus and proestrus [ 23 ] . Prepubertal pine voles exposed to male urine also showed an increase in the number of largest follicles, but with no change in atresia [ 24 ] , as in our study.
Moreover, this growth response marks a difference between pheromonal acceleration of puberty in opossums and that which is well-documented in mice, wherein females paired with males ovulate at a lower body mass (< 20 g) than that of isolated females (> 20 g) [ 30 31 ] .
Juvenile female opossums (n = 28) were weaned at 56 days and individually housed at 84 days in polycarbonate cages (30 × 30 × 15 cm) in a mixed-sex colony in an American Association for Accreditation of Laboratory Animal Care-approved facility in the Botany and Zoology Building at The Ohio State University.