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Title of Journal: J Ethol

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Abbravation: Journal of Ethology

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Springer Japan

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DOI

10.1007/bf02029853

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1439-5444

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The mechanism underlying the regulation of workre

Authors: Yasunori Ishii Eisuke Hasgeawa
Publish Date: 2012/11/06
Volume: 31, Issue: 1, Pages: 61-69
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Abstract

The mechanism underlying the regulation of the work performed by the members of a colony is a crucial factor in the colonial life of eusocial organisms If the response thresholds of the workers vary greaterthanchance variation in the prevalence of workrelated behaviors ie in the “working degree” is expected and the distribution of these behaviors should be reestablished after demographic changes We show that greaterthanchance variation in the working degree is restored after a demographic change in the ant Myrmica kotokui The working degree varied markedly among workers and the degree of variation could not be explained by chance alone Moreover the degree of variation could not be attributed to intrinsic factors such as reproductive potential or age After a demographic change some previously inactive workers started to work whereas some previously active workers became inactive These shifts resulted in the restoration of a substantial amount of variation in the working degree These observations all support the hypothesis that variance in the response threshold is the basis of the regulation of workrelated behaviors in this ant

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  1. Behavioural interactions between the lizard Takydromus tachydromoides and the praying mantis Tenodera aridifolia suggest reciprocal predation between them
  2. The influence of female presence and seasonality on the home range size and activity patterns of male domestic cats in Brazil’s Atlantic Forest
  3. Age of the Jeju pony ( Equus caballus ) at first reproduction: potential costs for foals and mothers that first reproduce early in life
  4. Non-parental infanticide in a dense population of the Black-billed Magpie ( Pica pica )
  5. Female ornamentation, parental quality, and competitive ability in the rock sparrow
  6. Timing of female sexual unreceptivity and male adjustment of copulatory behaviour under competition risk in the wolf spider Schizocosa malitiosa
  7. Feeding aggregation and aggressive interaction between bottlenose ( Tursiops truncatus ) and Commerson’s dolphins ( Cephalorhynchus commersonii ) in Patagonia, Argentina
  8. Plasticity of grooming behavior against entomopathogenic fungus Metarhizium anisopliae in the ant Lasius japonicus
  9. Discrimination of chemical stimuli in conspecific fecal pellets by a visually adept iguanid lizard, Crotaphytus collaris
  10. Attack intensity by two species of territorial damselfish (Pomacentridae) as estimates of competitive overlap with two species of wrasse (Labridae)
  11. Seasonal and diurnal use of eight different call types by Indian peafowl ( Pavo cristatus )
  12. Do displays and badges function in establishing the social structure of male toad-headed lizards, Phrynocephalus vlangalii ?
  13. Sexual coercion does not exclude luring behavior in the climbing camel-spider Oltacola chacoensis (Arachnida, Solifugae, Ammotrechidae)
  14. Aggressive behaviour and nest-site defence during the breeding season in an island kestrel population
  15. Sexual selection in genetic colour-polymorphic species: a review of experimental studies and perspectives
  16. Do wild brown lemurs reconcile? Not always
  17. Arboreal locomotor and postural behaviour of European red squirrels ( Sciurus vulgaris L.) in northern Greece
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