Faculty of Agricultural Sciences and Food

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    Loss rates of honey bee colonies during winter 2017/18 in 36 countries participating in the COLOSS survey, including effects of forage sources
    (Informa UK Limited, 2019-05-30)
    Gray, Alison
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    Brodschneider, Robert
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    Adjlane, Noureddine
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    Ballis, Alexis
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    Brusbardis, Valters
    This short article presents loss rates of honey bee colonies over winter 2017/18 from 36 countries, including 33 in Europe, from data collected using the standardized COLOSS questionnaire. The 25,363 beekeepers supplying data passing consistency checks in total wintered 544,879 colonies, and reported 26,379 (4.8%, 95% CI 4.7–5.0%) colonies with unsolvable queen problems, 54,525 (10.0%, 95% CI 9.8–10.2%) dead colonies after winter and another 8,220 colonies (1.5%, 95% CI 1.4–1.6%) lost through natural disaster. This gave an overall loss rate of 16.4% (95% CI 16.1–16.6%) of honey bee colonies during winter 2017/18, but this varied greatly from 2.0 to 32.8% between countries. The included map shows relative risks of winter loss at regional level. The analysis using the total data-set confirmed findings from earlier surveys that smaller beekeeping operations with at most 50 colonies suffer significantly higher losses than larger operations (p < .001). Beekeepers migrating their colonies had significantly lower losses than those not migrating (p < .001), a different finding from previous research. Evaluation of six different forage sources as potential risk factors for colony loss indicated that intensive foraging on any of five of these plant sources (Orchards, Oilseed Rape, Maize, Heather and Autumn Forage Crops) was associated with significantly higher winter losses. This finding requires further study and explanation. A table is included giving detailed results of loss rates and the impact of the tested forage sources for each country and overall.
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    Modeling honey yield, defensive and swarming behaviors of Italian honey bees (Apis mellifera ligustica) using linear-threshold approaches
    (2019-10-21)
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    Costa, Cecilia
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    Bergomi, Patrizia
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    Lourenco, Daniela
    Genetic improvement of honey bees is more difficult compared to other livestock, due to the very different reproductive behavior. Estimation of breeding values requires specific adjustment and the use of sires in the pedigree is only possible when mating of queens and drones is strictly controlled. In the breeding program of the National Registry for Italian Queen Breeders and Bee Producers the paternal contribution is mostly unknown. As stronger modeling may compensate for the lack of pedigree information, we tested two models that differed in the way the direct and maternal effects were considered. The two models were tested using 4003 records for honey yield, defensive and swarming behaviors of Italian honey bee queens produced between 2002 and 2014. The first model accounted for the direct genetic effect of worker bees and the genetic maternal effect of the queen, whereas model 2 considered the direct genetic effect of the queen without maternal effect. The analyses were performed by linear (honey production) and threshold (defensive and swarming behavior) single-trait models; estimated genetic correlations among traits were obtained by a three-trait linear-threshold model.
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    MACEDONIAN AUTOCHTHONOUS VARIETIES: EMBROIDERED PEPPERS (Capsicum annuum L.)
    (University Ss. Cyril and Methodius in Skopje, 2019)
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    Sandeva Atanasova, Nadica
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    Green Forage Yield and Yield Components of Five Oilseed Rape Genotypes (Brassica napus L.) in Response to Sowing Date and Harvest Stage
    (National and University Library of the Republic of Srpska, 2017-01-23)
    Prentović, Tatjana
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    Ristakoska, Biljana
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    <jats:p>Five oilseed rape genotypes were tested at three sowing dates and harvested at two developmental phases to determine their effects on green forage yield and yield components during 2013/14 growing season. The highest density of canopy was observed at the third sowing date (86 - 157 plants/m2). Among five genotypes, AbaKus formed the most plants/m2 - 109, 106 and 157. The highest plant height was observed from the first sowing date (94.7 - 104 cm). The examined genotypes formed most leaves/plant, from 8.1 to 9.9 planted at the first sowing date. The cultivar AbaKus expressed a significantly higher forage yield (61.2 t/ha) during the second harvest phase. Together with cv. Perko, they had the greatest green forage production potential. </jats:p>
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    Effect of vegetable fats and oils on sensory characteristics of processed chicken frankfurter-style sausages
    (Institute of Meat Hygiene and Technology, 2009)
    Pejkovski Zlatko
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    Silovksa NIkolova Aleksandra
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    Belichovska Katerina
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    Gaspelin Lea
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    Polak Tomas
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    Vlijanie na razlicni rastitelni masti i masla vrz instrumentalno boja i tekstura kaj pileskite renovki
    (Institut of Animal Science, 2007)
    Zlatko Pejkovski
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    Aleksandra Silovska Nikolova
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    Kratovalieva Mimi
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    Gasperlin Lea
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    Polak Tomaz
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    Nekoi prirodni boila i nivnoto vlijanie vrz senzornite karakteristiki ba renovkite bez nitriti i fosfati
    (Institut of Animal Science, 2007)
    Pejkovski Zlatko
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    Kratovalieva Mimi
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    Silovska NIkolova Aleksandra
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    Gasperlin Lea
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    Polak Tomas
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    Vlijanie na rasstitelnite masti i massla vrz senzornite karakteristiki kaj pileskite renovki
    (Institut of Animal Science, 2007)
    Zlatko Pejkovski
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    Aleksandra Silovska Nikolova
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    Kratovalieva Mimi
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    Gasperlin Lea
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    Polak Tomas
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    Instrumentalna analiza na bojata na renovkite proizvedena so prirodni boila, bez nitriti i fosfati
    (Institut of Animal Science, 2007)
    Pejkovski Zlatko
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    Kratovalieva Mimi
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    Silovska NIkolova Aleksandra
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    Gasperlin Lea
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    Polak Tomaz
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    New products in meat industry
    (2006)
    Zlatko Pejkovski
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    Aleksandra Silovska Nikolova
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    Mimi Kratovalieva
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    Daniela Belichovska