کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4536563 1626444 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The jumbo squid, Dosidicus gigas (Ommastrephidae), living in oxygen minimum zones I: Oxygen consumption rates and critical oxygen partial pressures
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
The jumbo squid, Dosidicus gigas (Ommastrephidae), living in oxygen minimum zones I: Oxygen consumption rates and critical oxygen partial pressures
چکیده انگلیسی

Dosidicus gigas is a large, metabolically active, epipelagic squid known to undertake diel vertical migrations across a large temperature and oxygen gradient in the Eastern Pacific. Hypoxia is known to cause metabolic suppression in D. gigas. However, the precise oxygen level at which metabolic suppression sets in is unknown. Here we describe a novel ship-board swim tunnel respirometer that was used to measure metabolic rates and critical oxygen partial pressures (Pcrit) for adult squids (2–7 kg). Metabolic rate measurements were validated by comparison to the activity of the Krebs cycle enzyme, citrate synthase, in mantle muscle tissue (2–17 kg). We recorded a mean routine metabolic rate of 5.91 μmol g−1 h−1 at 10 °C and 12.62 μmol g−1 h−1 at 20 °C. A temperature coefficient, Q10, of 2.1 was calculated. D. gigas had Pcrits of 1.6 and 3.8 kPa at 10 and 20 °C, respectively. Oxygen consumption rate (MO2) varied with body mass (M) according to MO2=11.57 M−0.12±0.03 at 10 °C. Citrate synthase activity varied with body mass according to Y=9.32 M−0.19±0.02.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 95, 15 October 2013, Pages 218–224
نویسندگان
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