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DEFRA and Immuno-contraception

While maize was used to bait the treatment, it seems that meat is now being used. Dr Martin Goulding is worried that such a practice "risks turning an animal which is primarily vegetarian onto meat as a food source with implications for livestock kills."

Wild boar are messy eaters and part of what they eat will inevitably find its way onto the forest floor making it available to non-target species. (See also BBC page on wild boar in Britain) (Details and concerns about the Forest of Dean project can be seen in full at

( Comment on the subject of the contraceptive trials in the Forest of Dean would be gratefully received.)

April 23 2009 ~ DEFRA's baited offal for wild boar in the Forest of Dean

April 23 2009 ~ "The disease implications are frightening"

Bill writes: " you will know it is totally illegal to feed meat or meat products to poultry, pig or any other farm animals. It does seem there is one law for the citizens and another for government departments, in the late 1970's or early 1980's caponisation of cockerels was made illegal on the grounds that the eating of such birds could possibly (but no research was done to investigate this) affect the the fertility of humans. recently the Forestry commision stated that they would permit the stalking and culling of the Forest boar for sale as food, so based on the aurgument used for the stopping of poultry sterilisation we could soon see a decline in the number of human births as well."

Elaine writes: "At least this attempt to limit conception is better than culling."

Effect of the GnRH vaccine GonaCon on the fertility, physiology and behaviour of wild boar

Auteur(s) / Author(s)


Résumé / Abstract

Fertility control has the potential to be used as an attractive alternative to lethal methods for limiting population growth in overabundant species. This study tested the effectiveness and potential side effects of the single-dose gonadotrophin-releasing hormone (GnRH) vaccine GonaCon on the physiology and behaviour of two groups of captive female wild boar in two sequential trials (Trial 1 and Trial 2). Following vaccination with GonaCon, data on contraceptive effectiveness were recorded as well as data on time budget, social rank, bodyweight, haematology and biochemistry. The concentration of GnRH-antibody titres peaked 2-6 weeks after vaccination and remained relatively high 12 weeks after vaccination. In Trial 1, all control females and none of the treated females gave birth. In Trial 2, faecal progesterone of treated females decreased to basal levels within a month of vaccination. No differences in time budget, social rank and blood parameters were observed between treated and control females. Bodyweight increased more in treated females than in controls. These results indicated that GonaCon can suppress reproduction of wild boar with no significant short-term effects on behaviour and physiology. GonaCon can be regarded as an effective, humane and safe contraceptive for managing wild boar populations.

Revue / Journal Title

Wildlife research   ISSN 1035-3712 

Source / Source

2008, vol. 35, no6, pp. 540-547 [8 page(s) (article)]

Langue / Language


Editeur / Publisher

Commonwealth Scientific and Industrial Research Organization, Collingwood, AUSTRALIE  (1991) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 7441 M, 35400018387820.0080