137. CORRELATION OF O2 CONSUMPTION WITH 

 BODY SIZE: INVERTEBRATES 



A general form of the relation of oxygen conBUinptlon to body size: M = bW*^ (M = Og con- 

 sumptlon, W = body wleght, b and a = constants). All values In columns B and D, except 

 IS and ID, are read from smoothed log- log plots of Og consumption against body weight, ac- 

 cording to log M = log b + a log W, or against body length, if so indicated. Plotting the 

 indicated values on double- logarithmic paper and connecting them with a straight line, 

 approximate ved.ues for intermediate sizes may be obtained. 



Species 



Body Weight 



(mg or g) 



or Length (mm) 



Temper- 

 ature 



O2 Consumption 



m/hr 



Respiratory 

 Quotient! 



HI 



HE 



js: 



Protozoa 



Amoeba (Chaos chaos) 



0.05 mg 



22.5 



0.008-0.015 



0.82 



Platyhelmlnthes 



Planaria (Dugesla gonocephala) 



l*-65 mg 20 1.1-9.82 



0.71 



Nemathelminthes 



Ascarls (Ascaris lumbricoides) 



320-7760 mg 



57 



8it-it8o5 



Annelida 



Earthworm (Lumbricus spp. ) 

 Manure worm (Eisenia foetida) 



200-2500 mg 

 12-850 mg 



20 

 15 



16.5-212^ 

 2.6-575^ 



Mollusca 



Mussel, freshwater (Anodonta cynaea) 

 Snail, Viennese garden (Cepaea 



vindobonenls) 120-2650 mg5 



Snail, land (Helix, Helicigona, Cepaea) 

 Snail, pond ear (Radix auricularla) 12.5-52.8 mm 

 Snail, pond great (Lymnaea stagnalis) I55O-55OO mg 



Snail, pond great (L. stagnalis) ll»0-1700 mg 

 Snail, ramshom (Planorbarius comeus) 1750-5770 mg 

 Snail, ramshom (P. comeus) 5.8-52 mm 



55-500 mg 

 8.5-5U mm 



Snail, ramshom (Planorbls spp.) 

 Snail, river (Vlvlparus vlviparus) 



Snail, river (V. fasciatus) 



5.5-57 ram 



20 



25 

 15 



20 

 15 

 25 

 25 

 25 



25 



5. 1-102"*. 6 



59-600'*^ 

 60-1002 



11-662 



5l*-1222 



2.U-2252''7 



2.7-20.92 



8.5-1205 



2.5-2U35.7 



1 

 0.90 



0.88 

 1.00 



0.60 



Arthropoda, Crustacea 



^6 



Bug, pill (Armadillidium pallasi) 

 Bug, sow (Oniscus asellus) 

 Bug, sow (Porcelllo scaber) 

 Crab, kelp (Pugettia producta) 



Crayfish (Astacus astacus) 

 Crayfish (Potainoblus torrentium) 

 Flea, water (Daphnia pulex) 

 Isopod, freshwater (Asellus aquatlcus 

 Isopod, freshwater (A. aquatlcus) 



Shrimp, brine (Artemla sallna) 



15-160 mg 

 6-I6 mm 

 6-20 mm. 

 rf2. 53-529 g*^ 



0.71-1.10 mm 



U. 5-11. 5 mm 



5-12 mm 



0.55-10 mm 



21 

 23 

 25 

 15 



21 

 20 

 25 



50 



5.2-16.25 

 5-225 

 1^-702 

 dO. 1*5-11*. 5 ml2»y 



0.91* 

 0.95 

 1.01 



0.0198-0.0755 

 1.6-10.15 

 I.8U-II.95 



0.015-11.55 



0.88 



Arthropoda, Insecta 



r 



27 Cockroach, oriental (Blatta orlentalls 

 ?8 Mealworm, yellow (Tenebrlo molitor) 

 ?g Walking stick, oriental (Dixippus 

 I morORus ) 



6.5-52 mm 

 20-220 mg 



8-850 mg 



25 

 20 



20 



6.5-800** 

 10.2-101'* 



2.6-206"* 



1.06 

 0.70 



0.86 



/l/ C02 liberated + O2 coneumptlon. /2/ O2 consumption varies as a power of body weight In- 

 termediate between O.67 and 1.0 (cf Fn 5,1*). /5/ Og consumption varies as the two-thirds 

 power of body weight (i.e., wO-67). /!*/ Og consumption varies with body weight (i.e., H^-^). 

 /5/ Winter. Spring, 200-2700 ng. /6/ Winter. Spring, 2U-281 cu mm/hr. /l/ Values cor- 

 rected by Krywlenczyk, J. /8/ 91.6U-119 g. /9/ Note change in units: ml/hr. 90.17-12.7 

 al/hr. 



230 



