کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8318455 1538984 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Is complex allometry in field metabolic rates of mammals a statistical artifact?
ترجمه فارسی عنوان
آیا آلومتری پیچیده در سطح متابولیسم میدان پستانداران یک مصنوعی آماری است؟
کلمات کلیدی
آلومتریوم، میزان متابولیسم موضعی، لگاریتم، پستانداران، رگرسیون غیر خطی، مقیاس
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی
Recent reports indicate that field metabolic rates (FMRs) of mammals conform to a pattern of complex allometry in which the exponent in a simple, two-parameter power equation increases steadily as a dependent function of body mass. The reports were based, however, on indirect analyses performed on logarithmic transformations of the original data. I re-examined values for FMR and body mass for 114 species of mammal by the conventional approach to allometric analysis (to illustrate why the approach is unreliable) and by linear and nonlinear regression on untransformed variables (to illustrate the power and versatility of newer analytical methods). The best of the regression models fitted directly to untransformed observations is a three-parameter power equation with multiplicative, lognormal, heteroscedastic error and an allometric exponent of 0.82. The mean function is a good fit to data in graphical display. The significant intercept in the model may simply have gone undetected in prior analyses because conventional allometry assumes implicitly that the intercept is zero; or the intercept may be a spurious finding resulting from bias introduced by the haphazard sampling that underlies “exploratory” analyses like the one reported here. The aforementioned issues can be resolved only by gathering new data specifically intended to address the question of scaling of FMR with body mass in mammals. However, there is no support for the concept of complex allometry in the relationship between FMR and body size in mammals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 203, January 2017, Pages 322-327
نویسندگان
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