Spatial organization and division of labour in the bumblebee Bombus impatiens

Individuals in many types of animal groups show both reproductive and task-related division of labour. In some social insect species, such division of labour may be related to the spatial organization of workers inside the nest. We examined colonies of bumblebees and found that (1) 11–13% of workers maintained small spatial fidelity zones inside the nest, and all workers tended to remain at a specific distance from the colony centre independent of their age; (2) smaller individuals maintained smaller spatial zones and tended to be closer to the centre; and (3) individuals that were more likely to perform the in-nest task of larval feeding tended to remain in the centre of the nest, whereas foragers were more often found on the periphery of the nest when not foraging. Individuals that performed other tasks did not maintain a predictable distance to the centre, and there was no evidence that spatial preferences changed over time. Instead, spatial patterns may result from inherent differences between individuals in terms of activity level, and may be a self-organized sorting mechanism that influences division of labour among workers.

[1]  B. Cole,et al.  The social behavior of Leptothorax allardycei (Hymenoptera, Formicidae): time budgets and the evolution of worker reproduction , 2004, Behavioral Ecology and Sociobiology.

[2]  S. Robson,et al.  Social and spatial organisation in colonies of a primitively eusocial wasp, Ropalidia revolutionalis (de Saussure) (Hymenoptera: Vespidae) , 2000 .

[3]  J. Heringa,et al.  The ontogeny of a dominance hierarchy in colonies of the BumblebeeBombus terrestris (Hymenoptera, Apidae) , 1986, Insectes Sociaux.

[4]  M. Lindauer Communication Among Social Bees , 1961 .

[5]  G. Bloch,et al.  Developmentally determined attenuation in circadian rhythms links chronobiology to social organization in bees , 2006, Journal of Experimental Biology.

[6]  Dave Goulson,et al.  Bumblebees: Behaviour, Ecology, and Conservation , 2003 .

[7]  Scott Camazine,et al.  Self-organizing pattern formation on the combs of honey bee colonies , 2004, Behavioral Ecology and Sociobiology.

[8]  Gene E. Robinson,et al.  Regulation of honey bee age polyethism by juvenile hormone , 1987, Behavioral Ecology and Sociobiology.

[9]  Chris Tofts,et al.  Foraging for work: how tasks allocate workers , 1994, Animal Behaviour.

[10]  Thomas D. Seeley,et al.  Adaptive significance of the age polyethism schedule in honeybee colonies , 1982, Behavioral Ecology and Sociobiology.

[11]  N. Franks,et al.  Social resilience in individual worker ants and its role in division of labour , 1994, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[12]  Walter R. Tschinkel,et al.  Ritualized conflict in Odontomachus brunneus and the generation of interaction-based task allocation: a new organizational mechanism in ants , 1999, Animal Behaviour.

[13]  Nigel R. Franks,et al.  Testing the limits of social resilience in ant colonies , 2000, Behavioral Ecology and Sociobiology.

[14]  A. Weidenmüller,et al.  Size variation and foraging rate in bumblebees (Bombus terrestris) , 2002, Insectes Sociaux.

[15]  H. Whitehead,et al.  The influence of maternal lineages on social affiliations among humpback whales (Megaptera novaeangliae) on their feeding grounds in the southern gulf of Maine. , 2006, The Journal of heredity.

[16]  M. J. W. Eberhard The social biology of polistine wasps. , 1969 .

[17]  Anja Weidenmüller,et al.  The control of nest climate in bumblebee (Bombus terrestris) colonies: interindividual variability and self reinforcement in fanning response , 2004 .

[18]  H. Velthuis,et al.  Ovarian development and egg laying in workers of Bombus terrestris , 1989 .

[19]  G. Robinson,et al.  Juvenile hormone does not affect division of labor in bumble bee colonies (Hymenoptera: Apidae). , 1990 .

[20]  T. Seeley The Wisdom of the Hive , 1995 .

[21]  K. Hartfelder,et al.  Reproductive division of labor, dominance, and ecdysteroid levels in hemolymph and ovary of the bumble bee Bombus terrestris. , 2005, Journal of insect physiology.

[22]  J. Godin,et al.  The social organization of free‐ranging fish shoals , 2000 .

[23]  S. O’Donnell,et al.  Reproductive physiology, dominance interactions, and division of labour among bumble bee workers , 2004 .

[24]  J. Fewell,et al.  Models of division of labor in social insects. , 2001, Annual review of entomology.

[25]  John B. Free,et al.  Bumblebee economics , 1979, Nature.

[26]  J C Stout,et al.  Can alloethism in workers of the bumblebee, Bombus terrestris, be explained in terms of foraging efficiency? , 2002, Animal Behaviour.

[27]  N. Franks,et al.  Spatial relationships within nests of the ant Leptothorax unifasciatus (Latr.) and their implications for the division of labour , 1995, Animal Behaviour.

[28]  R. Matthews,et al.  Ants. , 1898, Science.

[29]  F. W. Sladen The humble-bee. , 1989 .

[30]  R. Cartar,et al.  Adjustment of foraging effort and task switching in energy-manipulated wild bumblebee colonies , 1992, Animal Behaviour.

[31]  J. Free The division of labour within bumblebee Colonies , 1955, Insectes Sociaux.

[32]  S. O’Donnell,et al.  Individual and colony factors in bumble bee division of labor (Bombus bifarius nearcticus Handl; Hymenoptera, Apidae) , 2000, Insectes Sociaux.

[33]  Nigel R. Franks,et al.  Ecology and the evolution of worker morphological diversity : a comparative analysis with Eciton army ants , 2006 .

[34]  D. V. Alford The life of the bumblebee , 1978 .

[35]  E. P. Animal Behaviour , 1901, Nature.

[36]  G. Sorci,et al.  Non-defendable resources affect peafowl lek organization: A male removal experiment , 2007, Behavioural Processes.

[37]  G. Robinson,et al.  Hormonal and Genetic Control of Behavioral Integration in Honey Bee Colonies , 1989, Science.

[38]  A. D. Brian Division of Labour and Foraging in Bombus Agrorum Fabricius , 1952 .

[39]  Edward O. Wilson,et al.  Behavioral discretization and the number of castes in an ant species , 1976, Behavioral Ecology and Sociobiology.

[40]  T. A. Evans,et al.  Foraging and building in subterranean termites: task switchers or reserve labourers? , 2006, Insectes Sociaux.

[41]  Guy Theraulaz,et al.  Self-Organization in Biological Systems , 2001, Princeton studies in complexity.

[42]  J. Korb,et al.  Evolution of eusociality and the soldier caste in termites: a validation of the intrinsic benefit hypothesis , 2004, Journal of evolutionary biology.

[43]  G. Robinson Regulation of division of labor in insect societies. , 1992, Annual review of entomology.

[44]  S. Cameron Temporal Patterns of Division of Labor among Workers in the Primitively Eusocial Bumble Bee, Bombus griseocollis (Hymenoptera: Apidae)) , 2010 .

[45]  Istvá n Karsai,et al.  Nest shapes in paper wasps: can the variability of forms be deduced from the same construction algorithm? , 1998, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[46]  Daniel R. Papaj,et al.  Learning in two contexts: the effects of interference and body size in bumblebees , 2005, Journal of Experimental Biology.

[47]  N. Franks,et al.  Brood sorting by ants: distributing the workload over the work-surface , 1992, Behavioral Ecology and Sociobiology.