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New circuits are presented to determine precisely the counting losses suffered in the entire gamma-ray spectrometer and to allow automatic correction for them even in the case of time-dependent counting rates as encountered in the measurement of short-lived radioisotopes. Experimental proof is given that the proposed circuitry allows accurate quantitative measurements in gamma-ray spectrometry. With counting rates up to 20,000 cps losses amount to less than 1.5%.

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Acta Alimentaria
M. Grubešić
D. Konjević
K. Severin
M. Hadžiosmanović
K. Tomljanović
T. Mašek
J. Margaletić
, and
A. Slavica

The aim of this study was to determine and compare field dressing percentage in free-living wild boars from lowland (Spačva) and hilly (Papuk) habitats in Croatia. The obtained data indicate a better dressing percentage for wild boars from the Papuk region, with mean values of 77.35% for piglets, 79.61% for yearlings, 80.1% for subadults and 81.93% for adults. The dressing percentage for wild boars from the Spačva region was on average 75.10% for piglets, 73.68% for yearlings, 74.85% for subadults and 63.24% for adults. Furthermore, the internal organs were divided into eatable (heart, liver and kidneys) and non-eatable viscera. Of the complete viscera weight, the eatable part represented 17.57% in piglets, 17.97% in yearlings, 13.37% in subadults and 15.69% in adult boars from the Papuk region. The same values for the Spačva region were 19.79% in piglets, 14.06% into yearlings, 12.87% in subadults and 8.67% in adults. The results obtained in this study indicate a better growth rate and dressing percentage for wild boars from the Papuk region. When the similar feeding potential and habitat characteristics of both hunting grounds are taken in consideration, the most possible explanation for the observed differences is crossbreeding of wild boars with domestic pigs. The nomadic keeping of domestic pigs in the area of Spačva remains a huge problem for the preservation of the pure, autochthonous wild boar genome.

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