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Bee Management

Productivity and longevity of honey bee queens inseminated with freshly collected and diluted semen

Productividad y longevidad de las abejas reinas inseminadas con semen recién recogido y diluido

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Pages 130-136 | Received 14 May 2015, Accepted 08 Jun 2016, Published online: 16 Sep 2016
 

Abstract

The aim of this study was to examine whether the addition of a diluent for honey bee sperm, directly before insemination, affects the quality and vitality of queens and their brood, in comparison to queens inseminated traditionally, with fresh semen. Honey bee queens were inseminated with diluted and homogenized semen collected from a few dozen drones, in order to increase the diversity of their offspring. Queens and drones (Apis mellifera carnica) were mated within subspecies, however, only three selected lines were used. The average number of spermatozoa filling the spermatheca of queens, inseminated with semen without dilution, freshly collected from drones, from a single colony (SCS) was not significantly higher, compared to queens inseminated with semen diluted and mixed (MCS); amounting to 5.1 and 4.4 million sperm, respectively. Queens from both groups started laying eggs at a similar time after insemination, and their average life expectancy in colonies, was 20.5 and 22.6 months, respectively. The most common reason for queen losses was supersedure, and the reasons for these losses were not significantly different between groups. Brood survival rates, in both groups, did not differ significantly.

El objetivo de este estudio fue examinar si la adición de un diluyente para el esperma de la abeja de la miel, directamente antes de la inseminación, afecta a la calidad y la vitalidad de las reinas y su cría, en comparación con las reinas inseminadas tradicionalmente, con semen fresco. Las abejas reinas fueron inseminadas con semen diluido y homogeneizado obtenido de unas pocas docenas de zánganos, con el fin de aumentar la diversidad de su descendencia. Las reinas y zánganos (Apis mellifera carnica) se aparearon dentro de su subespecie, sin embargo, sólo se utilizaron tres líneas seleccionadas. El número medio de espermatozoides que llenó la espermateca de las reinas inseminadas con semen sin dilución, recién extraído de zánganos, a partir de una sola colonia (SSC), no fue significativamente mayor en comparación con las reinas inseminadas con semen diluido y mixto (SMD); con valores de 5,1 y 4,4 millones de espermatozoides, respectivamente. Las reinas de ambos grupos comenzaron a poner huevos en un tiempo similar después de la inseminación, y su esperanza de vida media en las colonias, fue de 20,5 y 22,6 meses, respectivamente. La razón más habitual que causó las pérdidas de las reinas fue la substitución natural, y las causas de estas pérdidas no fueron significativamente diferentes entre los grupos. Las tasas de supervivencia de la cría no difirieron significativamente en ambos grupos.

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