Temperature regulation in the nocturnal melolonthine Sparrmannia flava

S. L. Chown; C. H. Scholtz

doi:10.1016/0306-4565(93)90038-U

Temperature regulation in the nocturnal melolonthine Sparrmannia flava

S. L. Chown, C. H. Scholtz

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

1. 1.|Sparrmannia flava Arrow (Coleoptera: Scarabaeidae) regulated thoracic temperature (T_th) during flight at 38.6°C over an ambient temperature (T_a) range of 11°C. 2. 2.|T_th and wing loading (19.99 N m^-2) were within the range predicted by body mass (0.80 g) based on previous studies of scaling in beetles, although conductance (0.0087 W°C^-1) was considerably lower and wingstroke frequency (87 Hz) higher than that previously recorded in beetles of similar mass. 3. 3.|The slope of the regression of abdominal temperature (T_ab) on T_a, at T_as > 20°C, was > 1, and physiological heat transfer was demonstrated experimentally, suggesting that low conductance necessitates active heat transfer at high T_as. 4. 4.|Sparrmannia flava's early-morning, anti-predator strategy involves adaptations which make it an exception to previous generalizations concerning the thermal biology of beetles.

Original language	English
Pages (from-to)	25-33
Number of pages	9
Journal	Journal of Thermal Biology
Volume	18
Issue number	1
DOIs	https://doi.org/10.1016/0306-4565(93)90038-U
Publication status	Published - 1 Jan 1993
Externally published	Yes

Keywords

Coleoptera
morphology
Sparrmannia flava
Thermoregulation
wingstroke frequency

Access to Document

10.1016/0306-4565(93)90038-U

Link to publication in Scopus

Cite this

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title = "Temperature regulation in the nocturnal melolonthine Sparrmannia flava",

abstract = "1. 1.|Sparrmannia flava Arrow (Coleoptera: Scarabaeidae) regulated thoracic temperature (Tth) during flight at 38.6°C over an ambient temperature (Ta) range of 11°C. 2. 2.|Tth and wing loading (19.99 N m-2) were within the range predicted by body mass (0.80 g) based on previous studies of scaling in beetles, although conductance (0.0087 W°C-1) was considerably lower and wingstroke frequency (87 Hz) higher than that previously recorded in beetles of similar mass. 3. 3.|The slope of the regression of abdominal temperature (Tab) on Ta, at Tas > 20°C, was > 1, and physiological heat transfer was demonstrated experimentally, suggesting that low conductance necessitates active heat transfer at high Tas. 4. 4.|Sparrmannia flava's early-morning, anti-predator strategy involves adaptations which make it an exception to previous generalizations concerning the thermal biology of beetles.",

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AU - Chown, S. L.

AU - Scholtz, C. H.

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N2 - 1. 1.|Sparrmannia flava Arrow (Coleoptera: Scarabaeidae) regulated thoracic temperature (Tth) during flight at 38.6°C over an ambient temperature (Ta) range of 11°C. 2. 2.|Tth and wing loading (19.99 N m-2) were within the range predicted by body mass (0.80 g) based on previous studies of scaling in beetles, although conductance (0.0087 W°C-1) was considerably lower and wingstroke frequency (87 Hz) higher than that previously recorded in beetles of similar mass. 3. 3.|The slope of the regression of abdominal temperature (Tab) on Ta, at Tas > 20°C, was > 1, and physiological heat transfer was demonstrated experimentally, suggesting that low conductance necessitates active heat transfer at high Tas. 4. 4.|Sparrmannia flava's early-morning, anti-predator strategy involves adaptations which make it an exception to previous generalizations concerning the thermal biology of beetles.

AB - 1. 1.|Sparrmannia flava Arrow (Coleoptera: Scarabaeidae) regulated thoracic temperature (Tth) during flight at 38.6°C over an ambient temperature (Ta) range of 11°C. 2. 2.|Tth and wing loading (19.99 N m-2) were within the range predicted by body mass (0.80 g) based on previous studies of scaling in beetles, although conductance (0.0087 W°C-1) was considerably lower and wingstroke frequency (87 Hz) higher than that previously recorded in beetles of similar mass. 3. 3.|The slope of the regression of abdominal temperature (Tab) on Ta, at Tas > 20°C, was > 1, and physiological heat transfer was demonstrated experimentally, suggesting that low conductance necessitates active heat transfer at high Tas. 4. 4.|Sparrmannia flava's early-morning, anti-predator strategy involves adaptations which make it an exception to previous generalizations concerning the thermal biology of beetles.

KW - Coleoptera

KW - morphology

KW - Sparrmannia flava

KW - Thermoregulation

KW - wingstroke frequency

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