TY - JOUR
T1 - Metabolic rate variation in Glossina pallidipes (Diptera
T2 - Glossinidae): Gender, ageing and repeatability
AU - Terblanche, J. S.
AU - Klok, C. J.
AU - Chown, S. L.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - Despite the importance of metabolic rate in determining flight time of tsetse and in mediating the influence of abiotic variables on life history parameters (and hence abundance and distribution), metabolic rate measurements and their repeatability have not been widely assessed in these flies. We investigate age-related changes in standard metabolic rate (SMR) and its repeatability, using flow-through respirometry, for a variety of feeding, gender and pregnancy classes during early adult development in laboratory-reared individuals of the tsetse fly, Glossina pallidipes. Standard metabolic rate (144-635 μW) was generally within 22% of previous estimates, though lower than the values found using closed system respirometry. There was no significant difference between the genders, but metabolic rate increased consistently with age, probably owing to flight muscle development. Repeatability of metabolic rate was generally high (r=0.6-0.9), but not in younger teneral adults and pregnant females (r≈0.05-0.4). In these individuals, low repeatability values are a consequence of muscle or in utero larval development. Tsetse and other flies generally have a much higher metabolic rate, for a given size, than do other insect species investigated to date.
AB - Despite the importance of metabolic rate in determining flight time of tsetse and in mediating the influence of abiotic variables on life history parameters (and hence abundance and distribution), metabolic rate measurements and their repeatability have not been widely assessed in these flies. We investigate age-related changes in standard metabolic rate (SMR) and its repeatability, using flow-through respirometry, for a variety of feeding, gender and pregnancy classes during early adult development in laboratory-reared individuals of the tsetse fly, Glossina pallidipes. Standard metabolic rate (144-635 μW) was generally within 22% of previous estimates, though lower than the values found using closed system respirometry. There was no significant difference between the genders, but metabolic rate increased consistently with age, probably owing to flight muscle development. Repeatability of metabolic rate was generally high (r=0.6-0.9), but not in younger teneral adults and pregnant females (r≈0.05-0.4). In these individuals, low repeatability values are a consequence of muscle or in utero larval development. Tsetse and other flies generally have a much higher metabolic rate, for a given size, than do other insect species investigated to date.
KW - Ageing
KW - Metabolic rate
KW - Repeatability
KW - Scaling
KW - Tsetse
UR - http://www.scopus.com/inward/record.url?scp=2342631263&partnerID=8YFLogxK
U2 - 10.1016/j.jinsphys.2004.02.009
DO - 10.1016/j.jinsphys.2004.02.009
M3 - Article
C2 - 15121455
AN - SCOPUS:2342631263
SN - 0022-1910
VL - 50
SP - 419
EP - 428
JO - Journal of Insect Physiology
JF - Journal of Insect Physiology
IS - 5
ER -