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Obrecht, E. & A. Scholl, 1981. Enzymelektrophoretische Untersuchungen zur Analyse der Verwandtschaftsgrade zwischen Hummel-und Schmarot-zerhummelarten (Apidae, Bombini). Apidologie 12(3): 257-268.

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Obrtel, R. 1969. The insect fauna of the herbage stratum of lucerne fields in southern Moravia (Czechoslovakia). Prirodoved. Pr. Ustavu Cesk. Akad. Ved Brne 3(10): 1-49.

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Ochoa, R. & B. M. O’Connor, 2000. Revision of the genus Horstiella (Acari: Acaridae): mites associated with neotropical Epicharis bees (Hymenoptera: Apidae). Annals of the Entomological Society of America 93(4): 713-737.

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O’Connor, B. M. 1988. Coevolution in astigmatid mite-bee associations. Pp. 339-346. In: Needham, G.R. (ed.), Africanized honey bees and bee mites. E. Horwood, Chichester, West Sussex, England.

O’Connor, B. M. 1993. The mite community associated with Xylocopa latipes (Hymenoptera: Anthophoridae: Xylocopinae) with description of a new type of acarinarium. International Journal of Acarology 19: 159-166.

O'Connor, B. M. 1999. Coevolution in astigmatid mite-bee associations. Africanized Honey Bees and Bee Mites :339-346.

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O’Connor, B. M. & G. C. Eickwort, 1988. Morphology, ontogeny, biology and systmatics of the genus Vidia (Acari : Winterschmidtiidae). Acarologia 29(2): 147-174.

Oddo, L. P. & S. Bogdanov, 2004. Determination of honey botanical origin: problems and issues. Apidologie 35: 2-3.

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Oddo, L. P. et al. 2004. Main European unifloral honeys: descriptive sheets. Apidologie 35: 38-81.

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Ohashi, K., S. Natori & T. Kubo, 1999. Expression of amylase and glucose oxidase in the hypopharyngeal gland with an age-dependent role change of the worker honeybee (Apis mellifera L.). Eur. J. Biochem. 265: 127-133.

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Okazaki, K. 1992. Nesting habits of the small carpenter bee, Ceratina dentipes, in Hengchun peninsula, southern Taiwan. Journal of the Kansas Entomological Society 65: 190-195.

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Oldroyd, B. P. 1988a. Are queen characters or worker characters more important to honey production. Pp. 91-96. In: Needham, G.R. (ed.), Africanized honey bees and bee mites. E. Horwood, Chichester, West Sussex, England.

Oldroyd, B. P. 1988b. The effectiveness of prophylactic sterilisation of beehive materials by gamma radiation. Australian Journal of Experimental Agriculture 28(6): 809-811.

Oldroyd, B. P. 1993. New approaches to honey bee taxonomy. Bee World 74(3): 105-107.

Oldroyd, B. P. 1996. Evaluation of Australian commercial honey bees for hygienic behaviour, a critical character for tolerance to chalkbrood. Aust. J. Exp. Agric. 73: 116-117.

Oldroyd, B. P. 1998. Controlling feral honeybee (Apis mellifera) (Hymenoptera: Apidae) populations in Australia: methodologies and costs. J. Aust. Ent. Soc. 37: 97-100.

Oldroyd, B. P. 1999. Coevolution while you wait: Varroa jacobsoni, a new parasite of western honeybees. Trends in Ecology and Evolution 14(8): 312-315.

Oldroyd, B. P. 2002. The Cape honey bee: an example of a social cancer. rends in Ecology and Evolution 17(6): 249-251.

Oldroyd, B. P., M. J. Clifton, K. Parker, S. Wongsiri, T. E. Rinderer & R. H. Crozier, 1998. Evolution of mating behavior in the genus Apis and an estimate of mating frequency in Apis cerana (Hymenoptera: Apidae). Ann. Ent. Soc. Am. 91: 700-709.

Oldroyd, B. P., M. J. Clifton, S. Wongsiri, T. E. Rinderer, H. A. Sylvester, R. H. Crozier, 1997. Polyandry in the genus Apis particularly Apis andreniformis. Behav. Ecol. Sociobiol. 40: 17-26.

Oldroyd, B. P., J. M. Cornuet, D. Rowe, T. E. Rinderer & R. H. Crozier, 1995. Racial admixture of Apis mellifera in Tasmania, Australia: similarities and differences with natural hybrid zones in Europe. Heredity 74(3): 315-325.

Oldroyd, B. P. & R. D. Goodman, 1988. In breeding and heterosis in queen bees in relation to brood area and honey production. Australian Journal of Agricultural Research 39(5): 959-964.

Oldroyd, B. P. & R. D. Goodman, 1990. On the relative importance of queens and workers to honey production. Apidologies 21(2): 153-160.

Oldroyd, B. P., R. D. Goodman, M. A. Z. Hornitzky & D. Chandler, 1989. The effect on American foulbrood of standard Oxytetracycline hydrochloride foulbrood of honey bees (Apis mellifera). Australian Journal of Agricultural Research 40(3): 691-697.

Oldroyd, B. P., L. A. Halling, G. Good, W. Wattanachaiyingcharoen, A. B. Barron, P. Nanork, S. Wongsiri & F. L. W. Ratnieks, 2001. Worker policing and worker reproduction in Apis cerana. Behavioral Ecology and Sociobiology 50: 371-377.

Oldroyd, B. P., L. Halling & T. E. Rinderer, 1999. Development and behaviour of anarchistic honeybees. Proc. R. Soc. Lond. B. 266: 1875-1878.

Oldroyd, B. P. & P. Hunt, 1990. The effects of additional queens on honey bee colony performance. Apidologie 21: 527 -536.

Oldroyd, B. P., S. H. Lawler & R. H. Crozier, 1994. Do feral honey bees (Apis mellifera) and regent parrots (Poltelis anthopeplus) compete for nest sites? Aust. J. Ecol. 19: 444-450.

Oldroyd, B. P. & C. Moran, 1983. Heritability of worker characters in the honey bee. Aust. J. Biol. Sci. 36: 323-332.

Oldroyd, B. P. & C. Moran, 1987. Additive and heterotic genetic effects in the haplo-diploid honeybee Apis mellifera. Australian Journal of Biological Sciences 40(1): 57-63.

Oldroyd, B. P., C. Moran & F. W. Nicholas, 1985. Diallel crosses of honeybees. 1. A genetic analysis of honey production using a fixed effects model. Journal of Apical Research 24(4): 243-249.

Oldroyd, B. P., C. Moran & F. W. Nicholas, 1987a. Diallel crosses of honeybees. II. A note presenting an estimate of the heritability of honey production under Australian conditions. Australian Journal of Agricultural Research 38(3): 651-654.

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Oldroyd, B. P., K. E. Osborne & M. Mardan, 2000. Colony relatedness in aggregations of Apis dorsata Fabricius (Hymenoptera, Apidae). Insectes Sociaux 47: 94-95.

Oldroyd, B. P. & F. L. W. Ratnieks, 2000. Evolution of worker sterility in honey-bees (Apis mellifera): how anarchistic workers evade policing by laying eggs that have low removal rates. Behavioral Ecology and Sociobiology 47: 268-273.

Oldroyd, B. P., F. L. W. Ratnieks & T. C. Wossler, 2002. Egg marking pheromones in honey-bees Apis mellifera. Behavioural Ecology and Sociobiology 51: 590-591.

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Oldroyd, B. P., T. E. Rinderer & S. Buco, 1991a. Heritability of morphological characteristics used to distinguish European and Africanized honey bees. Theoretical and Applied Genetics 82(4): 499-504.

Oldroyd, B. P., T. E. Rinderer & S. M. Buco, 1991b. Honey bees dance with their super-sisters. Animal Behaviour 42(1): 121-129.

Oldroyd, B. P., T. E. Rinderer & S. M. Buco, 1991c. Intracolonial variance in honey bee foraging behaviour: the effects of sucrose concentration. Journal of Apicultural Research 30(3/4): 137-145.

Oldroyd, B. P., T. E. Rinderer & S. M. Buco, 1992a. Intra-colonial foraging specialism by honey bees (Apis mellifera) (Hymenoptera: apidae). Behavioral Ecology and Sociobiology 30(5): 291-295.

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Oldroyd, B. P., W. S. Sheppard & J. A. Stelzer, 1992. Genetic characterization of the bees of Kangaroo Island, South Australia. Journal of Apicultural Research 31(3/4): 141-148.

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