1 / 11

Transition to Dorpers

Transition to Dorpers. John Anstee, Lauren Deane, Breony Moloney , Rebecca Ryan. Images Merino: http://www.think-differently-about-sheep.com/sheep_Breeds.htm Dorper: http://www.grownlocalok.com/news/grown-local-ok-about-the-breed-of-dorper-sheep. Outline. Merinos compared to Dorpers

linore
Download Presentation

Transition to Dorpers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Transition to Dorpers John Anstee, Lauren Deane, BreonyMoloney, Rebecca Ryan ImagesMerino: http://www.think-differently-about-sheep.com/sheep_Breeds.htm Dorper: http://www.grownlocalok.com/news/grown-local-ok-about-the-breed-of-dorper-sheep

  2. Outline • Merinos compared to Dorpers • Options for enterprises • Gross margin comparisons • Recommendations • References

  3. Merino vs Dorpers • Dorpers shed their fleece and thus do not require shearing, crutching or fly control. This can be achieved when the dorper flock reach at least F4. • Dorpers are known to have a higher fecundity than Merinos with an average weaning percentage of 118% where merinos are 86%.3 • Decreased need for large breeding flock • Dorpers are not seasonal breeders like Merinos and have been known to reach mature breeding age at one year. • Reach oestrus at 52 days after parturition therefore possible to lamb twice per year.2 3. Cloete, S. W. P., M. A. Snyman, et al. (2000). "Productive performance of Dorper sheep." Small Ruminant Research36(2): 119-135. 2. Snyman, M. A. and M. J. Herselman (2005). "Comparison of productive and reproductive efficiency of Afrino, Dorper and Merino sheep in the False Upper Karoo." South African Journal of Animal Science35(2): 98-108.

  4. Merino vs Dorper (continued) • Studies have shown the growth rates of Dorpers to remain relatively constant in large variety of climates and environments, where Merinos vary greatly. • Dorpers have a higher growth rate (44% higher than Merino)2 and mature size than merinos, therefore are more efficient as a meat production breed however also have a greater DSE value (2.72/ewe where Merinos are 2.23/ewe)1 • (therefore change from merino to Dorper flock must accommodate this when calculating stocking rate) 1. DPI website <http://www.dpi.nsw.gov.au/agriculture/farm-business/budgets/livestock>

  5. Transition from wool to sheep meat –What options do you have? Sell existing stock - purchase Dorper rams and F2 Dorper ewes Upgrade - purchase Dorper rams and upgrade the existing Merino ewe base F1 Dorper rams - appears to be a less costly option but is not viable

  6. Consider the genetics….impacts on management F1 50/50 F2 75/25 F3 87.5/12.5 F4 93.75/6.25 No shearing from F4

  7. Shearing vs Shedding • When can you stop shearing? - Doper sire – 8th year - F2/Dorper sire – 6th year • Heritability of shedding - moderate heritability (h2 0.34) - selection shedding vs economically important traits • Also consider… • Dark Medulated fibre (DMF) - DMFRS - Bale descriptions Y K R Source: http://cashdown.com.au

  8. Risks and Benefits • sensitivity - drought, price fluctuations • infrastructure • performance data - anecdotal evidence - ASBV Dorper $ Index • organic production - price premiums - product quality, supply chain, markets

  9. Gross Margin Comparisons • Over 10 years, the Merino enterprise provides the best return • Between the Dorperenterprises, using a Dorper sire over Merino ewes provides the better return • The Dorper enterprises’ viability are more heavily influenced by changes in price

  10. Recommendations • Brief overview of the information so far • Merino flock gives the best financial return according to the gross margin • Dorper option too attractive? • Which flock structure you should go • If you change to dorpers: what to do next • If you are unsure of what to do from this presentation…

  11. References • Cloete, S. W. P., M. A. Snyman, et al. (2000). Productive performance of Dorper sheep. Small Ruminant Research 36(2): 119-135. • DPI (2011) <http://www.dpi.nsw.gov.au/agriculture/farm-business/budgets/livestock> • Pollott, G.E. (2011). A suggested mode of inheritance for wool shedding in sheep. Journal of Animal Science: (89) 8. • Rose, M. and Bright, R.L. and Quigley, S.P. and Kleemann, D.O. (2000) Fibre Transfer in Merino Ewes Mated with Damara, Merino or Dorper Rams in Central Western Queensland. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia. • Sheep Genetics (2011) http://www.sheepgenetics.org.au/ • Snyman, M. A. and M. J. Herselman (2005). Comparison of productive and reproductive efficiency of Afrino, Dorper and Merino sheep in the False Upper Karoo. South African Journal of Animal Science 35(2): 98-108

More Related