@article {1498,
	title = {Discontinuous gas-exchange cycles in Scarabaeus dung beetles (Coleoptera : Scarabaeidae): Mass-scaling and temperature dependence},
	journal = {Physiological and Biochemical Zoology},
	volume = {72},
	number = {5},
	year = {1999},
	note = {Times Cited: 15Cited Reference Count: 38Cited References:      BUCK J, 1955, BIOL BULL, V109, P144     COSSINS AR, 1987, TEMPERATURE BIOL ANI     DUNCAN FD, 1997, PHYSIOL ENTOMOL, V22, P310     EDWARDS PB, 1988, OECOLOGIA, V75, P527     HACK MA, 1997, PHYSIOL ENTOMOL, V22, P325     HADLEY NF, 1993, J EXP BIOL, V177, P169     HAMILTON AG, 1964, P ROY SOC LOND B BIO, V160, P373     KANWISHER JW, 1966, BIOL BULL, V130, P96     KESTLER P, 1985, ENV PHYSL BIOCH INSE, P137     LEVY RI, 1966, J INSECT PHYSL, V12, P83     LEVY RI, 1966, J INSECT PHYSL, V12, P105     LIGHTON JRB, 1996, ANNU REV ENTOMOL, V41, P309     LIGHTON JRB, 1993, J COMP PHYSIOL B, V163, P11     LIGHTON JRB, 1995, J EXP BIOL, V198, P521     LIGHTON JRB, 1995, J EXP BIOL, V198, P1613     LIGHTON JRB, 1993, J EXP BIOL, V180, P229     LIGHTON JRB, 1993, J EXP BIOL, V179, P233     LIGHTON JRB, 1992, J EXP BIOL, V173, P289     LIGHTON JRB, 1991, J EXP BIOL, V159, P249     LIGHTON JRB, 1990, J EXP BIOL, V154, P509     LIGHTON JRB, 1990, J EXP BIOL, V151, P71     LIGHTON JRB, 1988, J EXP BIOL, V134, P363     LIGHTON JRB, 1996, J INSECT PHYSIOL, V42, P347     LIGHTON JRB, 1988, J INSECT PHYSL, V34, P361     LIGHTON JRB, 1995, PHYSIOL ZOOL, V68, P43     LIGHTON JRB, 1994, PHYSIOL ZOOL, V67, P142     LIGHTON JRB, 1985, PHYSIOL ZOOL, V58, P390     LOUW GN, 1986, J EXP BIOL, V120, P443     MILLER PL, 1974, PHYSL INSECTA, V4, P345     PETERS RH, 1983, ECOLOGICAL IMPLICATI     PUNT A, 1956, MULL PHYSL COMP OECO, V4, P132     PUNT A, 1950, PHYSL COMP OECOL, V2, P59     QUINLAN MC, 1993, PHYSIOL ZOOL, V66, P628     SCHMIDTNIELSEN K, 1997, ANIMAL PHYSL ADAPTAT     SCHNEIDERMAN HA, 1955, BIOL BULL, V109, P123     SOKAL RR, 1995, BIOMETRY PRINCIPLES     WASSERTHAL LT, 1996, ADV INSECT PHYSIOL, V26, P297     WILKINS MB, 1960, NATURE, V185, P481EnglishArticle263MHPHYSIOL BIOCHEM ZOOL},
	month = {Sep-Oct},
	pages = {555-565},
	abstract = {Although discontinuous gas exchange cycles (DGC) are known from many insects, the effects of body size and temperature on DGC have not been widely examined. Here, these effects are investigated in five Scarabaeus dung beetle species from mesic and xeric habitats. The investigation tests two hypotheses: that previous estimates of the scaling exponents for the DGC and its characteristics are more broadly applicable to insects, and that, in response to temperature, both DGC frequency and the quantity of CO2 emitted during the open (O) phase (O-phase emission volume) are modulated. Like previous workers, we find that (V) over dot (CO2) scaled as mass(0.968) and that O-phase emission volume scaled as mass(0.968) . However, temperature- associated increases in (V) over dot (CO2) (Q(10){\textquoteright}s of 2.19- 2.65) were modulated mostly by increases in DGC frequency since O-phase volumes remained constant across temperature. Flutter (F)-phase and O-phase durations were closely coupled to DGC duration, although the relationship between closed (C)-phase duration and DGC duration was less pronounced. We show that ventilation phase coefficients, previously considered a measure of the proportional duration of each phase of the DGC, calculated from the slopes of these relationships are a measure of change in phase duration with change in DGC duration and not a measure of the way in which total DGC duration is apportioned among phases. We suggest that proportions be used to estimate the contribution of each of the phases to the total duration of the DGC.},
	keywords = {ant, emission, formicidae, hymenoptera, insects, metabolism, respiratory transpiration, ventilatory patterns, water-loss},
	url = {<Go to ISI>://000084128100005},
	author = {Davis, A. L. V. and Chown, S. L. and Scholtz, C. H.}
}
