COMPARATIVE ASPECTS OF THE THERMAL BIOLOGY OF THE CAPE SPINY MOUSE, ACOMYS SUBSPINOSUS, AND THE COMMON SPINY MOUSE, A. SPINOSISSIMUS
In: Israel Journal of Ecology and EvolutionSearch for other papers by MICHAEL R. PERRIN in
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Thermal characteristics of Acomys subspinosus, from a disjunct population in the southwestern Cape separated from the more widely-dispersed Acomys populations in the rest of Africa, and A.spinosissimus, which has a southern central distribution in Africa, were investigated and compared with other Acomys species. A. subspinosus has a higher-than-expected resting metabolic rate (RMR) for its body mass (2.587 ± 0.387 ml O2g−1 h−1; Wb = 32.3 ± 3.2 g) and a higher RMR than A. spinosissimus, which has a lower-than-expected RMR (1.634 ±0.182 ml O2 g−1 h−1; Wb = 27.0 ± 2.2 g) for its body mass. Each species has a high, narrow thermoneutral zone. Evaporative water loss (EWL) increased with ambient temperature in both species. However, A. subspinosus increased EWL at a higher rate, two times greater than that of A. spinosissimus. Temperature regulation and thermal conductance are compared and discussed.
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COMPARATIVE ASPECTS OF THE THERMAL BIOLOGY OF THE CAPE SPINY MOUSE, ACOMYS SUBSPINOSUS, AND THE COMMON SPINY MOUSE, A. SPINOSISSIMUS
In: Israel Journal of Ecology and EvolutionSearch for other papers by MICHAEL R. PERRIN in
Current site
Google Scholar
PubMed
Search for other papers by COLLEEN T. DOWNS in
Current site
Google Scholar
PubMed
Thermal characteristics of Acomys subspinosus, from a disjunct population in the southwestern Cape separated from the more widely-dispersed Acomys populations in the rest of Africa, and A.spinosissimus, which has a southern central distribution in Africa, were investigated and compared with other Acomys species. A. subspinosus has a higher-than-expected resting metabolic rate (RMR) for its body mass (2.587 ± 0.387 ml O2g−1 h−1; Wb = 32.3 ± 3.2 g) and a higher RMR than A. spinosissimus, which has a lower-than-expected RMR (1.634 ±0.182 ml O2 g−1 h−1; Wb = 27.0 ± 2.2 g) for its body mass. Each species has a high, narrow thermoneutral zone. Evaporative water loss (EWL) increased with ambient temperature in both species. However, A. subspinosus increased EWL at a higher rate, two times greater than that of A. spinosissimus. Temperature regulation and thermal conductance are compared and discussed.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 236 | 60 | 18 |
| Full Text Views | 10 | 0 | 0 |
| PDF Views & Downloads | 8 | 0 | 0 |
