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Table 6 Genetic merit and economic benefits of commercial lambs born in year 20 for each scenario

From: Genetic and economic benefits of foreign sire contributions to a domestic sheep industry; including an Ireland-New Zealand case study

Scenario Genetic merit Economic benefit
Replacement index PVB ACB
Euro per lamb born (€) Millions of euro (€)
Base 2.51 45.28 3.63
PRO-intense 3.44 60.65 4.87
PRO-market 7.09 135.84 10.90
PRO-intense-market 9.45 179.93 14.44
PROFOR 7.37 144.28 11.58
FOR 6.00 123.88 9.94
FOR-5 6.72 136.14 10.92
FOR-10 6.50 132.15 10.60
  1. ‘Base scenario’ represents the current Irish industry; ‘PRO-intense scenario’ incorporates a reduction in the proportion of rams that are selected for mating from the top 40% to the top 20% and no shift in market share; ‘PRO-market scenario’ gradually shifts the market share of the CON subpopulation to the PRO subpopulation; ‘PRO-intense-market scenario’ includes a combination of a shifting market share towards the PRO subpopulation and a reduction in the proportion of rams that are selected for mating from the top 40% to the top 20% ; ‘PROFOR scenario’ shifts the market share of the CON subpopulation between PRO, FOR and PROFOR; ‘FOR scenario’ the commercial subpopulation sourced FOR sires directly from New Zealand; FOR-5 and FOR-10 scenario the commercial subpopulation sourced FOR sires directly from New Zealand, however new shipments were imported every 5 or 10 years, respectively
  2. PVB: Present value of benefits is an indicator of the total potential economic benefit gained due to the implementation of each scenario, while accounting for the change in the value of money over time
  3. ACB: Annualised cumulative benefit is an indicator of the potential annual economic benefit gained due to the implementation of each scenario, while accounting for the change in the value of money over time