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Larval temperature in brood clumps of Bombus pascuorum (Scop.)

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Journal of Apicultural Research
Vol. 24 (2) pp. 69-75
Date
June 1986
Article Title
Larval temperature in brood clumps of Bombus pascuorum (Scop.)
Author(s)
D. A. Barrow and R. S. Pickard
Abstract
For 21 larvae cocoon diameter (4.3 to 8.1 mm) was positively correlated with mean temperature at the fourth instar stage (27.06, SE ± 0.17 to 31.89, SE ± 0.15°C; r = 0.59, P<O.O1) and negatively correlated with variation in temperature (coefficient of variation, CV, 2.38 to 4.65; r = -0.53, P<0·05). Larvae located centrally in a brood clump generally experienced higher and more stable temperatures (30.89 ± 0.39°C; CV, 2.77 ± 0.16) than those located peripherally (29.10 ± 0.34°C; CV, 3.26 ± 0.13). Pupal weight was highly correlated with centrally located pupal cocoons of 7.27, SE ± 0.30 mm in diameter and peripheral cocoons of 5.78, SE ± 0.28 mm in diameter (r = 0.95, P<O·OO1).
Keywords

Bombus pascuorum, Larvae, brood, temperature

 
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