Original paper

Thermoregulation and Respiratory Metabolism in two Brazilian Stingless Bee Subspecies of Different Climatic Distribution, Tetragonisca angustula fiebrigi and T a angustula (Hymenoptera: Apidae: Meliponinae).

Proni, Edson A.; Hebling, Maria Jose A

Entomologia Generalis Volume 20 Number 4 (1996), p. 281 - 289

40 references

published: May 6, 1996

DOI: 10.1127/entom.gen/20/1996/281

BibTeX file

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The thermoregulatory capacity of colonies of the stingless bee subspecies Tetragonisca angustula fiebrigi Schwarz 1938, and Tetragonisca angustula angustula Latreille 1807, was investigated during winter and summer. The temperatures [T] inside and outside the nests were measured for 48 hh every 2 hh. In the brood area, the mean T observed for T afiebrigi are 28.1° and 29.5° C, respectively, during winter and summer, whereas for T a angustula they are 28.6° and 31.6° C. The ambient T in the same period range from 10.5° - 24.4° C (winter) and 20.1 - 36.3° C (summer). In workers, the respiratory rates [RR] increase with a rise in T, however, the differences between workers of the subspecies are not significant in contrast to the RR measured within subspecies in winter and summer. The Q10 values indicate an optimal T range from 15 - 25° C in winter, and from 20 - 30° C in summer for T a fiebrigi. For T a angustula the corresponding values were 25 - 35° C and 30 - 40° C, respectively.


Die Fähigkeit zur Thermoregulation wurde bei 2 Unterarten Stachelloser Bienen, Tetragonisca angustula fiebrigi Schwarz 1938 und T a angustula Latreille 1807, unter Winter- und Sommer-Bedingungen untersucht. Die Innen- und Außen-Temperaturen [T] des Brutnestes wurden jeweils über 2 Tage hinweg alle 2 Stunden gemessen. Als Durchschnitts-T wurden bei T a fiebrigi im Brutbereich 28.1° C im Winter und 29.5° C im Sommer ermittelt, bei T a angustula 28.6° C bzw 31.6° C. Zur selben Zeit lagen die Außen-T im Winter zwischen 10.5° C - 24.4° C und im Sommer zwischen 20.1° C - 36.3° C.


Tetragonisca angustula fiebrigi Schwarz 1938T a angustula Latreille 1807brood arearespiratory ratetemperature rangethermoregulatory capacity