The Analysis of Scrapie Genotype of the Genetic Resources of Latvian Dark Head Breed

Bārzdiņa, D.; Kairiša, D.

doi:10.5593/sgem2021/6.1/s25.34

Cited by 1 publication

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“…According to the Latvian Breed Fattening Control Protocol (unpublished), lambs from the same ram fed together are fattened to an average lamb weight of 45 to 50 kg, which is also the fattening weight of lambs recommended by Latvian sheep breeders for the Latvian dark-headed sheep breed. When fattening above this weight, the amount of meat obtained in terms of days of fattening is significantly higher than for a weight of up to 50 kg [4]; also, the proportion of fat increases.…”

Section: Discussionmentioning

confidence: 80%

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Analysing the Cost of Concentrated Feed and Income from Meat in Relation to Relative Growth Rate and Kleiber’s Ratio in Intensive Fattening of Latvian Dark-Headed Lambs

Trapina,

Kairisa,

Paramonova

2024

Agriculture

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One of the goals of the breeding program of the Latvian national sheep breed Latvian dark-head (LT; Latvijas tumšgalve) is the improvement of meat productivity, in parallel with good reproduction characteristics. The main part of the costs is the cost of feeding, which can be reduced by raising sheep with high feed efficiency. This goal can be achieved by selecting sheep based on feed efficiency indicators. The fattening data of 100 LT lambs were analysed using the relative growth rate (RGR) and Kleiber’s ratio (KR) indicators. The statistical difference was determined between low- and high-efficiency groups by calculating the cost of concentrate feed and income from meat realisation. The difference in the cost of concentrate feed was found after 60-days of intensive fattening and on the day needed for fattening up to 50 kg of live weight of lambs. When calculating the income of lamb meat, the differences between low and high RGR and/or KR efficiency groups were established. Thus, selecting high-ranking RGR and KR sheep can improve the cost and/or income of LT sheep breeders in Latvia.

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Section: Discussionmentioning

confidence: 80%

“…To achieve this goal, LT has been crossed with other breeds for which a specific trait is more developed [3]. LT breed rams have been analysed using lamb fattening indicators in recent years [4,5].…”

Section: Introductionmentioning

confidence: 99%