Thermal ecology and behaviour of the nomadic social forager Malacosoma disstria

@article{McClure2011ThermalEA,
  title={Thermal ecology and behaviour of the nomadic social forager Malacosoma disstria},
  author={M{\'e}lanie McClure and Elizabeth Cannell and Emma Despland},
  journal={Physiological Entomology},
  year={2011},
  volume={36}
}
The present study examines whether the nomadic social caterpillar Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae) can thermoregulate despite the lack of a tent, and evaluates the role of thermoregulation in directing the colony's behaviour. The presence of a radiant heat and light source (i.e. a lamp in the laboratory experiments and the sun in the field observations) enables caterpillar colonies to increase body temperature by basking (remaining still under a heat source) and this is… 
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References

SHOWING 1-10 OF 32 REFERENCES
Collective Foraging Patterns of Field Colonies of Malacosoma disstria Caterpillars
Abstract We monitored 12 colonies of the nomadic social caterpillar Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae) on trembling aspen, Populus tremuloides Michx. (Salicaceae), under field
Thermal Gains Through Collective Metabolic Heat Production in Social Caterpillars of Eriogaster lanestris
TLDR
Investigation of thermal characteristics of aggregations of social, tent-building caterpillars of the small eggar moth Eriogaster lanestris shows that metabolic heat production sufficiently explains this effect, and aggregating in the tent may confer selective advantages under overcast weather or at night, when behavioral thermoregulation through basking is not possible.
Thermoregulation behaviour in codling moth larvae
TLDR
The thermoregulation behaviour of the codling moth, Cydia pomonella, is investigated in temperature gradient experiments with larvae feeding within apples, and with mature larvae searching for cocooning sites, with no difference between males and females.
Thermal ecology of gregarious and solitary nettle-feeding nymphalid butterfly larvae
TLDR
The combination of behavioural thermoregulation and gregariousness in larval insects has important implications for voltinism patterns and range extension (via increased development rates) as a result of changes in cloud cover as well as changes in temperature.
Daily foraging schedule of field colonies of the eastern tent caterpillar Malacosoma americanum
TLDR
monitoring the daily foraging patterns of seven colonies of the eastern tent caterpillar was monitored photoelectronically to provide the first detailed record of the foraging behavior of a gregarious caterpillar under field conditions, it is indicated that this species follows a schedule of feeding and growth shaped by factors other than those directly related to feeding efficiency and ambient temperature.
ROLES OF THE TENT IN BEHAVIORAL THERMOREGULATION OF EASTERN TENT CATERPILLARS
TLDR
Operative temperature models were used to evaluate the roles of the tent and of aggregation behaviors in the thermoregulation of tent caterpillars and found that temperatures of a model aggregation on the tent surface were higher than those of a single caterpillar model.
Ontogenetic changes in social behaviour in the forest tent caterpillar, Malacosoma disstria
TLDR
Changes in individual responses to cues from conspecifics that explain changes in aggregation during caterpillar development are demonstrated and scaling relationships suggest that many of the benefits associated with group-living in caterpillars decrease as individuals grow larger, providing an adaptive explanation for observed ontogenetic changes in social behaviour.
Thermal ecology, behavior, and growth of gypsy moth and eastern tent caterpillars
TLDR
Growth rates of tent caterpillars in the field are greater than that expected for the average ambient temperature of 15°, and closely approximate growth in the laboratory at 25°, near the average Tb exhibited in theField data are used to develop hypotheses for the evolution of caterpillar thermal responses.
Pros and cons of group living in the forest tent caterpillar: separating the roles of silk and of grouping
TLDR
The present study is among the first to provide empirical evidence for an adaptive explanation of observed ontogenetic changes in aggregative behavior and the benefits of exogenous silk thus decreased during larval development, whereas the costs associated with crowding increased.
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