Procjena tjelesne mase ovaca travničke pramenke na osnovu njihovih tjelesnih mjera na području Bilogore, Hrvatska

Scientific paper - Original scientific paper

• Title (english): The estimation of body weight from body measurements of Travnik Pramenka sheep in the area of Bilogora, Croatia
• Author: Josip NOVOSELEC
• Author: Ivica GREGURINČIĆ
• Author: Željka KLIR
• Author: Boro MIOČ
• Author: Ivan ŠIRIĆ
• Author: Valentino DRŽAIĆ
• Author: Zvonko ANTUNOVIĆ
• Author's institution: Josip Juraj Strossmayer University of Osijek; Faculty of Agrobiotechnical Sciences Osijek
• Author's institution: University of Zagreb; Faculty of Agriculture
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract (croatian)

Cilj ovoga istraživanja bio je utvrđivanje veze između tjelesne mase i tjelesnih mjera ovaca travničke pramenke te jednadžba predviđanja u procjeni njihove tjelesne bez upotrebe stočne vage. Istraživanje je provedeno na obiteljskom poljoprivrednom gospodarstvu „Aščić“ iz Velike Peratovice na području Bilogore. Tjelesne mjere iz kojih su izračunati indeksi tjelesne razvijenosti uzete su od 39 ovaca. Ovce u predmetnom istraživanju imale su, skromnije tjelesne mjere i tjelesnu masu u odnosu na poželjne mjere navedene u Programu uzgoja ovaca u Republici Hrvatskoj, što je najvjerojatnije posljedica načina držanja, hranidbe i proizvodnog statusa. Analizom korelacije između pojedinih tjelesnih mjera i mase ovaca utvrđena je najjača i značajno (P<0,05) pozitivna korelacija za širinu prsa (0,81). Regresijskom analizom utvrđene su jednadžbe za procjenu tjelesne mase ovaca kao zavisne varijable te utvrđeni koeficijenti determinacije. Najveći koeficijent
determinacije je utvrđen za varijable širine prsa. Najveća vrijednost koeficijenta determinacije 0,86 je utvrđena kada su sve varijable (tjelesne mjere) bile uključene u jednadžbu. Najbolja jednadžba za predviđanje tjelesne mase je s uključenjem širine prsa, Y = -7,303 + 2,955 x Š.P. Širina prsa je najbolji pokazatelj u procjeni tjelesne mase ovaca travničke pramenke te samostalno sudjeluje s 65% varijacija tjelesne mase ovaca travničke pramenke.

Abstract (english)

The aim of present research was to establish the relationship between live body weight and some body measurements in Travnik sheep as a step towards establishing prediction equations to estimate live body weight of sheep under field conditions without using weighing scales. The research was conducted on the family farm "Aščić" from Velika Peratovica in the Bilogora area. The body measures from which the indices of physical development were calculated were taken from 39 sheep. The sheep in the present research had more modest body measurements and body weight than the desirable measures and weights listed in the Sheep Breeding Program in the Republic of Croatia, which is most likely due to the way they were kept, nutrition and their production status. Correlation analysis between individual body measures and sheep weights revealed the strongest and significantly positive correlation (P<0.05) for the width of the chest (0.81). The regression analysis determined the equations for estimating the body weight of the sheep as a dependent variable and determined the coefficients of determination. The highest value of the coefficient of determination of 0.86 was determined when all variables (body measures) were included in the equation. The best prediction equation for predicting the body weight from body measurements is by including the chest width variable alone in the equation Y = -7.303 + 2.955 x C.W. Chest width is the best predictor for the estimation body weight of Travnik sheep and this alone contribute 65% variation in the body weight of adult Travnik sheep.

• Keywords (croatian): Travnička pramenka; tjelesne mjere; indeksi tjelesne razvijenosti; korelacija; regresija; procjena
• Keywords (english): Travnik sheep; body measures; body development indices; correlation; regression; prediction
• Language: croatian
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of Central European Agriculture
• Numbering: vol. 21, no. 2, pp. 207-214
• e-ISSN: 1332-9049
• DOI: https://doi.org/10.5513/JCEA01/21.2.2667
• URN:NBN: urn:nbn:hr:204:987701
• Publication: 2020
• Document URL: https://hrcak.srce.hr/239311
• Type of resource: Text
• Access conditions: Open access
• Created on: 2023-12-08 08:43:52