Reproductive ability of queen bees under feeding bees by soybean meal from native and transgenic soy
R. S. Fedoruk, L. I. Romaniv
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Institute of Animal Biology NAAS str. Vasyl Stus, 38, Lviv, 79034, Ukraine
The study was conducted in the spring-summer period on 3 groups of honeybees of Carpathian breed, with 3 bee families in each group. Bees of (I) control group were held for stationary conditions with natural nutrition. Bees of (II) the experimental group received in addition to natural food soybean meal of native varieties of 200 g/bee families/week, and bees of (III) experimental group were fed by soybean meal of transgenic varieties in the same amount. Experimental period lasted 35 days with an additional nutrition interval of 7 days. The intensity of oviposition was determined using a standard framework — mesh 5x5 cm square cross section. The measurements were performed with an interval of 12 days counting from the area of sealed bee brood and the number of laid eggs. The significant differences in intensity of oviposition of queen bees of II and III experimental groups compared with the control over all the 12-day stages of the research period have been established. During the entire experimental period, the queen bee of the control (I) and II and III research groups laid correspondingly: 54432, 59328 and 61740 eggs. Number of laid eggs in II and III research groups during investigated period was higher by 9.0 and 13.4% compared to the control. The period of soybean meal after-action was characterized by significant difference of intensity of egg-laying of queen bees of II and III experimental groups compared to the control group I. The highest intensity of egg-laying of queen bees of all three groups was observed at after-action stages III and IV. The quantitative differences of laid eggs during all final period of the control (I) and II and III research groups respectively at level of: 71472, 76104 (106.4%) 80016 (112.0%) have been shown. It has been established that for the entire period of oviposition by queen bee of control (I), II and III of the research groups was respectively: 125 904, 135 432, 141 756 and was superior to the control group II — 7.6% and group III — 12.6 %. During the entire experimental period, the number of laid eggs per unit of body weight of females of the control group (I) was 259, and II and III D respectively 272 and 297 and was greater than control at 4.6–10.5% and 10.1-18.5%. The highest numbers of laid eggs per unit of body weight in the final period were at 36 and 48-th day in females of II and III research groups — 7.1 and 7.7 and 7.1 and 7.8 units / mg or 103.6 and 112.2 and 102.8 and 112.9% for the control group.
Keywords: bee, soy, GMO, oviposition, queen bee, brood
