Stocking rate effects on the worm burdens of Angora goats and Merino sheep
- 1 September 1984
- journal article
- research article
- Published by Wiley in Australian Veterinary Journal
- Vol. 61 (9), 280-282
- https://doi.org/10.1111/j.1751-0813.1984.tb06009.x
Abstract
Worm egg counts of yearling Angora or Merino wethers grazing in mixed flocks at either 4/ha or 8/ha were observed over a 5 month period. Based on faecal egg counts infection levels in the sheep increased for the first 3 months and then decreased as the animals developed resistance. Egg counts in the goats did not decrease during the experiment. Post mortem worm counts indicated that there was a significant host species--stocking rate interaction on worm burdens of Haemonchus contortus adults and Ostertagia circumcincta adults and larvae. Goats had more H. contortus and O. circumcincta adults than sheep at the 8/ha stocking rate. At 4/ha goats had fewer O. circumcincta fourth stage larvae than sheep. There was no stocking rate effect on the numbers of Trichostrongylus axei or T. colubriformis. Sheep had more T. axei and fewer T. colubriformis than goats.Keywords
This publication has 4 references indexed in Scilit:
- Farm management and systems of helminth controlVeterinary Parasitology, 1980
- The influence of breed on the susceptibility of sheep and goats to a single experimental infection with Haemonchus contortusVeterinary Record, 1978
- A COMPARISON OF WORM BURDENS IN GRAZING MERINO SHEEP AND ANGORA GOATSAustralian Veterinary Journal, 1976
- RELATIONSHIP OF NEMATODE INFECTION TO EFFICIENCY OF WOOL PRODUCTIONGrass and Forage Science, 1967