Effects of deslorelin implants on reproduction in the common brushtail possum (Trichosurus vulpecula)

• DOI: 10.1071/rd07046
• Publication Date: 2007-10-29T22:06:56Z
• Authors: Jutta Eymann; Catherine A. Herbert; Brian P. Thomson; Tim E. Trigg; Desmond W. Cooper; Douglas C. Eckery
• Keywords: Brushtail possum

The present study investigated the effects of slow-release implants containing gonadotrophin-releasing hormone (GnRH) agonist deslorelin on reproduction in common brushtail possum (Trichosurus vulpecula). Captive female possums were assigned to control (placebo implant), low dose (4.7 mg deslorelin) or high (9.4 groups; males groups. acute treatment at level pituitary gland similar between two sexes, where a transient rise luteinising concentration was induced over first 24 h. In females, this associated with disruption normal oestrous cycle and mating within 2–10 days some treated individuals, but no young subsequently detected. By 3 weeks after treatment, females became anoestrus remained infertile for least one breeding season. reversible subset that had their removed, although time taken produce offspring variable. Paradoxically, male fertile during chronic exposure. Despite significant declines basal follicle-stimulating testosterone concentrations, as well an inability respond GnRH challenge, sired many there evidence testicular regression. conclusion, is potential by using treatment.