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The aim of the study was to assess the cognitive abilities of horses in recognizing humans by sight and smell. Two experiments were performed. In the first experiment, the behaviour of horses exposed to a visual stimulus (photographs of familiar and unfamiliar people) was observed. The second experiment examined their behaviour evoked by an olfactory stimulus. The following variables was assessed:...
Pradolina Bzury-Neru jest jednym z niewielu obszarów na terenie Polski, gdzie liczebność piskorza znacznie przekracza wartości referencyjne przyjmowane jako wystarczające do uznania stanu populacji za właściwy (FV). W sieci kanałów melioracyjnych pradoliny piskorz osiągał wysokie zagęszczenia (1 os./m2 cieku). Typowymi miejscami występowania piskorza są niedoceniane i pomijane w badaniach faunistycznych...
The aim of the study was to assess the suitability of egg specific gravity (ESG) as an accompanying trait in estimation of the birds’ breeding value for hatchability. The study involved 3 generations of performance recorded laying hens Rhode Island White (RIW) and Rhode Island Red (RIR). The breeding merit for number of chicks hatched from eggs laid (NCH) was estimated with three different model variants...
The purpose of the study was to investigate the effect of service sire on fertilization rate and loses during hatching as a way of increasing the accuracy of breeding value estimation of layers for hatchability. Layers from five generations of two breeds – Rhode Island White and Rhode Island Red – were individually recorded for fertilization rate, percentage of chicks hatched from eggs laid,set, and...
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