Porcine zona pellucida vaccine sourced from the USA caused a significant serological response in captive Kaimanawa mares. Two injections of the vaccine given two weeks apart gave a serological response similar to that resulting from three injections given every two weeks over four weeks. Two injections of a vaccine produced at Massey University given to a thoroughbred mare gave a similar response to that produced by the American vaccine. A serological response of this level is likely to prevent conception during the following breeding season. The mass production of the vaccine using porcine
zona pellucida material is difficult in New Zealand due to the large number of sows’ ovaries required per vaccine (around 80 ovaries per dose) and the limited number of sows killed at any meat plant. The American vaccine is a suspension which must be shaken vigorously before use. Moreover the material quickly settles out of suspension, and this may make it difficult to use in a dart gun under field conditions.
|Author||Stafford, KJ.; Minot, E.O.; Linklater, W.L.; Cameron, EX; Todd, S.E.|
|Secondary title||Conservation Advisory Science Notes No. 330|
|Institution||NZ Department of Conservation|
|Control method||Fertility Control|