@conference {40368,
	title = {Oestrus synchronisation and oestrus detection in Swamp Buffaloes (Bubalus bubalis)},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {25-28},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Selective mating of Perendale sheep for increased or reduced  susceptibility as lambs to an experimental challenge with Haemonchus  contorus commenced in 1986. Four years later changes were assessed  by monitoring faecal nematode egg count (FEC) in ewes and their progeny.   In the absence of drenching, mature flock ewes were given 7000 infective  larvae of H. contortus and 3000 larvae of Trichostrongylus  colubriformis in mid May 1990 after mating. FEC were monitored at  regular intervals during pregnancy and 4 times during the periparturient  period. Ewe and ram lamb progeny were faecal sampled on 5 occasions  between weaning (November 1990) and May 1991. Lambs were drenched at  most sampling dates. All stock were grazed across pasture contaminated  previously with mixed parasite populations.   Adult ewes selected as lambs for Resistance (low FEC) shed fewer eggs  than Susceptible (high FEC) line ewes throughout pregnancy, 2 weeks pre-  and 3, 6 and 9 weeks post-parturition. At the periparturient peak,  approximately 3 weeks after lambing, Low FEC line ewes maintained FEC  which were only 25\% of those in the High FEC line.   Lambs from the Low FEC line had significantly lower FEC than their High  counterparts on 3 of 5 sample dates (P<0.01). At the final sample date  (30 April 1991), there was a 10-fold difference in mean FEC between  extreme sire groups. Bulked faecal cultures demonstrated that  Haemonchus and Trichostrongylus were the dominant genera.  },
	issn = {1176-5283},
	author = {Hill FI and Knight TW and Death AF and Wyeth TK and Ridland M}
}
