. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 248 Inward water measured during II I I <// J. C. WRIGHT AND J. MACHIN Table III and other vapor absorbers Uptake flux (Mgh"' cm~- Pa'1) SE Uptake flux (MgrT1 Pa"1) SE %M/12h SE A. vulgare C con\-c.\in — — — O. asL'llus P. dilaianm — — — P. scabcr P spinicornis /\ pri/iiiuMn T. rathkci 241
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 248 Inward water measured during II I I <// J. C. WRIGHT AND J. MACHIN Table III and other vapor absorbers Uptake flux (Mgh"' cm~- Pa'1) SE Uptake flux (MgrT1 Pa"1) SE %M/12h SE A. vulgare C con\-c.\in — — — O. asL'llus P. dilaianm — — — P. scabcr P spinicornis /\ pri/iiiuMn T. rathkci L oceuiiica Arenivaga — — — Thermobia — — — Tenebrio — — — Onymacris — — — Liposcelis — — — See previous references for sources of data. Uptake fluxes are standardized for both absorbing surface area and vapor pressure deficit (ng h ' cm • Pa'1), and for vapor pressure deficit only (^g h"' Pa"'). They are also expressed as proportional gains in saturated air (% hydrated mass per 12 h). Standardized uptake fluxes reveal capacities for vapor absorption in the Oniscidea to be an order of magnitude higher than in other groups. Oniscidea reveals a much lower coefficient of in- dicating a relative increase in uptake flux in smaller an- imals. This may be achieved by a proportional enlarge- ment of the absorbing endopods in early instars and smaller species, or by other mechanisms such as propor- tional changes in ventilatory patterns and rates of coupled water transport. We have no current explanation for why such a low scaling coefficient should be adaptive. 1- 0 2 -2 -25 Liposcelis Onymacris Tenebrio A Thermobia Arenivaga 1 log. Mass Figure 3. Log-log plot of uptake flux (in ^g h 'Pa ') against mass (mg) for a selection of \apo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
