کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1973011 1060305 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Allometric scaling of lung volume and its consequences for marine turtle diving performance
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Allometric scaling of lung volume and its consequences for marine turtle diving performance
چکیده انگلیسی

Marine turtle lungs have multiple functions including respiration, oxygen storage and buoyancy regulation, so lung size is an important indicator of dive performance. We determined maximum lung volumes (VL) for 30 individuals from three species (Caretta caretta n = 13; Eretmochelys imbricata n = 12; Natator depressus n = 5) across a range of body masses (Mb): 0.9 to 46 kg. VL was 114 ml kg−1 and increased with Mb with a scaling factor of 0.92. Based on these values for VL we demonstrated that diving capacities (assessed via aerobic dive limits) of marine turtles were potentially over-estimated when the VL-body mass effect was not considered (by 10 to 20% for 5 to 25 kg turtles and by > 20% for turtles ≥ 25 kg). While aerobic dive limits scale with an exponent of 0.6, an analysis of average dive durations in free-ranging chelonian marine turtles revealed that dive duration increases with a mass exponent of 0.51, although there was considerable scatter around the regression line. While this highlights the need to determine more parameters that affect the duration-body mass relationship, our results provide a reference point for calculating oxygen storage capacities and air volumes available for buoyancy control.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 148, Issue 2, October 2007, Pages 360–367
نویسندگان
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