Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity

Comparative studies of mortality in the wild are necessary to understand the evolution of aging; yet, ectothermic tetrapods are underrepresented in this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study of aging rates and longevity across wild tetrapod ectotherms, using data from 107 populations (77 species) of nonavian reptiles and amphibians. We test hypotheses of how thermoregulatory mode, environmental temperature, protective phenotypes, and pace of life history contribute to demographic aging. Controlling for phylogeny and body size, ectotherms display a higher diversity of aging rates compared with endotherms and include phylogenetically widespread evidence of negligible aging. Protective phenotypes and life-history strategies further explain macroevolutionary patterns of aging. Analyzing ectothermic tetrapods in a comparative context enhances our understanding of the evolution of aging.Animal science

'Presenting' the past: perspectives on time for accounting and management history

Concepts of time in accounting and management historiography have only previously been considered as partial subsets of other methodological issues. This paper investigates our concepts of historical time with a view to offering alternative foundations to the unidirectional linear concept of chronological time employed in historical research project design and execution. Its analytical approach is pluralist in that it draws upon the historiographic writings of historians and historical theorists of traditional and post-modern persuasions, both within and beyond the accounting and management history fields. It addresses teleological, historicist and narrativist temporal underpinnings and considers historical practice in relation to assumptions about and interpretations of continuity and discontinuity. Time is extended beyond its conventional accounting and management chronology to include consideration of co-present, cyclical, relativist, structuralist and spatial time. Intrinsic and reflexive relationships between past, present and future are explored. The paper argues for a postmodern pluralisation of our historiographic approaches to time and their informing revisitations of historical accounting and management subjects with a view to better understanding that which we thought we already knew.time, historiography, past, present, future, continuity, discontinuity,