Publications by authors named "Katia Peres Gramacho"
Article Synopsis
- * Researchers analyzed 37 bee colonies, divided into hygienic (16) and non-hygienic (21), by examining 300 worker bees from each colony monthly while correlating their findings with climate data.
- * Results showed low average mite infestations (below 10%), with a peak in November, and no significant difference between the two groups regarding infestations; the data suggests that acaricides may not be necessary for mite control in Brazil.
Article Synopsis
- A large-scale survey conducted in Latin America found that on average, 30.4% of managed honey bee colonies and 39.6% of stingless bee colonies were lost each year over a two-year period (2016-2018).
- Summer losses for stingless bees (30.9%) were higher compared to winter losses (22.2%), while honey bee losses did not show the same seasonal pattern.
- The survey revealed significant differences in colony loss rates between countries and over the years, indicating challenges in maintaining bee colony health and economic viability for those involved in beekeeping.
This study is aimed at evaluating the effect of different extenders on the cryopreservation of semen from Africanized honeybees (A. mellifera). Semen from honeybee drones from 10 different colonies was obtained by endophallus exposure technique and immediately evaluated for motility, viability using fluorescent probes, functional membrane integrity using the water test, and morphology.
View Article and Find Full Text PDFHygienic behavior is a desirable trait in honey bees (Apis mellifera L.), as hygienic bees quickly remove diseased brood, interrupting the infectious cycle. Hygienic lines of honey bees appear to be more sensitive to the odors of dead and diseased honey bee brood, and Africanized honey bees are generally more hygienic than are European honey bees.
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