Reproductive biology of Varroa destructor in Africanized honey bees (Apis mellifera) von Calderón, R. A, van Veen, J. W, Sommeijer, M. J, Sanchez, L. A

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Colony reproduction in Tetragonisca angustula (Apidae, Meliponini) von Veen, J.W. van, Sommeijer, M.J

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Natural patterns of caste and sex allocation in the stingless bees Melipona favosa and M. trinitatis related to worker behaviour von SOMMEIJER, M. J, DE BRILIJN, L. L. M, MEEUWSEN, F. J. A. J, MARTENS, E. P

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Influence of environmental and colony factors on the initial commodity choice of foragers of the stingless bee Plebeia tobagoensis (Hymenoptera, Meliponini) von HOFSTEDE, F. E, SOMMEIJER, M. J

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Behavioural data on the production of males by workers in the stingless bee Melipona favosa (Apidae, Meliponinae) von SOMMEIJER, M. J, CHINH, T. X, MEEUWSEN, F. J. A. J

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Colony foraging in different species of stingless bees (Apidae, Meliponinae) and the regulation of individual nectar foraging von DE BRUIJN, L. L. M, SOMMEIJER, M. J

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Behavioural development and abdomen inflation of gynes and newly mated queens of Melipona beecheii (Apidae, Meliponinae) von VAN VEEN, J. W, SOMMEIJER, M. J, AGUILAR MONGE, I

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Behaviour of drones in Melipona (Apidae, Meliponinae) von VAN VEEN, J. W, SOMMEIJER, M. J, MEEUWSEN, F

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Niche differentiation in nectar-collecting stingless bees: the influence of morphology, floral choice and interference competition von Biesmeijer, J.C, Richter, J.A.P, Smeets, M.A.J.P, Sommeijer, M.J

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role of internal and external information in foraging decisions of Melipona workers (Hymenoptera: Meliponinae) von Biesmeijer, J.C, Nieuwstadt, M.G.L. van, Lukacs, S, Sommeijer, M.J

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Nest and Colony Characteristics of Three Stingless Bee Species in Vietnam with the First Description of the Nest of Lisotrigona carpenteri (Hymenoptera: Apidae: Meliponini) von Chinh, T. X., Sommeijer, M. J., Boot, W. J., Michener, C. D.

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Drone congregations apart from the nest in Melipona favosa von SOMMEIJER, M. J, DE BRUIJN, L. L. M

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Observations on gynes and drones around nuptial flights in the stingless bees Tetragonisca angustula and Melipona beecheii (Hymenoptera, Apidae, Meliponinae) von Veen, J.W. van, Sommeijer, M.J

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Distribution of labour among workers of Melipona favosa F.: age-polyethism and worker oviposition von SOMMEIJER, M. J

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Pollen sources for Apis mellifera L. (Hymenoptera, Apidae) in Surinam, based on pollen grain volume estimates [neotropics] von Biesmeijer, J.C. (Utrech University (Pays Bas). Laboratory of Comparative Physiology), van Marwijk, B, van Deursen, K, Punt, W, Sommeijer, M.J

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Nectar foraging by stingless bees in Costa Rica: botanical and climatological influences on sugar concentration of nectar collected by Melipona von Biesmeijer, J.C. (Utrecht University (Pays Bas). Laboratory of Comparative Physiology, Ethology and Socio Ecology Group), Smeets, M.J.A.P, Richter, J.A.P, Sommeijer, M.J

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The oldest butterfly collection of the Netherlands von Zwakhals, C J, Sommeijer, M J, Heerebout, Gerard R

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Water content of stingless bee honeys (Apidae, Meliponini) : interspecific variation and comparison with honey of Apis mellifera von BIJLSMA, Lubertus, DE BRUIJN, Luc L. M, MARTENS, Edwin P, SOMMEIJER, Marinus J

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The Social Food-Flow Within the Colony of a Stingless Bee, Melipona Favosa (F.) von Sommeijer, Marinus J, De Bruijn, Luc L.M, Van De Guchte, Cees

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Production of sexuals in the stingless bee Trigona (Lepidotrigona) ventralis flavibasis cockerell (Apidae, Meliponini) in northern Vietnam von CHINH, Tong X, SOMMEIJER, Marinus J

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