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HONEY BEES, APIS MELLIFERA (HYMENOPTERA: APIDAE), AS POLLINATORS OF LOWBUSH BLUEBERRY, VACCINIUM ANGUSTIFOLIUM, ON NEWFOUNDLAND COASTAL BARRENS

Published online by Cambridge University Press:  31 May 2012

Derek Lomond
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's AlB 3X9
David J. Larson
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's AlB 3X9

Abstract

Flower production, fruit set, and pollinator activity were measured in two 1-year postburn blueberry fields on the coastal barrens of the Avalon Peninsula, Newfoundland. Honey bees were stocked at a density of 1.7 colonies/ha in one field while the control field lacked honey bees. Bloom production was similar in the two fields but fruit set was 54% in the test compared with 39% in the control field. Native pollinator (bee) populations were similar between fields but total pollinator populations were much higher in the test field with the difference contributed by honey bees. On the coastal barrens, where native pollinator populations are low and bloom exists in abundance for a short period of time, under-pollination may limit fruit set under some conditions and thus honey bees may have value in increasing fruit yield.

Résumé

La production de fleurs, la mise à fruit et l'activité pollinisatrice ont été mesurées dans deux champs de bleuet brûlés 1 an auparavant et situés sur les terres côtières dénudées de la péninsule d'Avalon, Terre-Neuve. Des abeilles domestiques ont été implantées à la densité de 1.7/hectare dans un champ, alors qu'elles étaient absentes dans le champ témoin. Bien que la production florale ait été similaire dans les deux champs, la mise à fruit fut de 54% dans le champ testé, comparé à 39% dans le témoin. Les populations naturelles de pollinisateurs (abeilles) étaient similaires dans les deux champs mais les populations totales de pollinisateurs étaient beaucoup plus élevées dans le champ testé, la différence étant due aux abeilles domestiques. Sur les terres côtières dénudées, les populations naturelles de pollinisateurs étant faibles et les fleurs étant abondantes pendant une courte période, l'insuffisance de la pollinisation peut limiter la mise à fruit dans certaines conditions. Les abeilles domestiques seraient alors utiles pour augmenter le rendement en fruit.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1983

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