کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8318324 1538971 2018 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Clown knifefish (Chitala ornata) oxygen uptake and its partitioning in present and future temperature environments
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Clown knifefish (Chitala ornata) oxygen uptake and its partitioning in present and future temperature environments
چکیده انگلیسی
It has been argued that tropical ectotherms are more vulnerable to the projected temperature increases than their temperate relatives, because they already live closer to their upper temperature limit. Here we examine the effects of a temperature increase in environmental temperature to 6 °C above the present day median temperature (27 °C) in the freshwater air-breathing fish Chitala ornata, on aspects of its respiratory physiology in both normoxia and in hypoxia. We found no evidence of respiratory impairment with elevated temperature. The standard metabolic rate (SMR) and routine metabolic rate (RMR) in the two temperatures in normoxia and hypoxia increased with Q10 values between 2.3 and 2.9, while the specific dynamic action (SDA) and its coefficient increased from 7.8 to 14.7% in 27 °C and 33 °C, respectively. In addition, Chitala ornata exhibited significantly improved growth at the elevated temperature in both hypoxic and normoxic water. While projected temperature increases may negatively impact other essential aspects in this animal's environment, we see no evidence of a negative impact on this species itself.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 216, February 2018, Pages 52-59
نویسندگان
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