Effects of Deepwater Horizon crude oil exposure, temperature and developmental stage on oxygen consumption of embryonic and larval mahi-mahi (Coryphaena hippurus)

被引：65
作者：
Pasparakis, Christina [1 ]
Mager, Edward M. [1 ]
Stieglitz, John D. [1 ]
Benetti, Daniel [1 ]
Grosell, Martin [1 ]
机构：
[1] Univ Miami, Dept Marine Biol & Ecol, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA
来源：
AQUATIC TOXICOLOGY | 2016年 / 181卷
关键词：
Oil spill; Fish development; Toxicity; Multi stressors; Metabolic rate; Nitrogen excretion; ZEBRAFISH DANIO-RERIO; COBIA RACHYCENTRON-CANADUM; TROUT ONCORHYNCHUS-MYKISS; FISH EMBRYOS; CARDIAC TOXICITY; GULF; SENSITIVITY; EXPRESSION; METABOLISM; EXCRETION;
D O I：
10.1016/j.aquatox.2016.10.022
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
The timing and location of the 2010 Deepwater Horizon (DWH) incident within the Gulf of Mexico resulted in crude oil exposure of many commercially and ecologically important fish species, such as mahi-mahi (Coryphaena hippurus), during the sensitive early life stages. Previous research has shown that oil exposure during the embryonic stage of predatory pelagic fish reduces cardiac function a particularly important trait for fast-swimming predators with high aerobic demands. However, it is unclear whether reductions in cardiac function translate to impacts on oxygen consumption in these developing embryos and larvae. A 24-channel optical-fluorescence oxygen-sensing system for high-throughput respiration measurements was used to investigate the effects of oil exposure, temperature and developmental stage on oxygen consumption rates in embryonic and larval mahi-mahi. Oil-exposed developing mahi-mahi displayed increased oxygen consumption, despite clear cardiac deformities and bradycardia, confirming oxygen uptake and delivery from a source other than the circulatory system. In addition to metabolic rate measurements, nitrogenous waste excretion was measured to test the hypothesis that increased energy demand was fueled by protein catabolism. This is the first study to our knowledge that demonstrates increased energy demand and energy depletion in oil-exposed developing mahi-mahi. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：113 / 123
页数：11
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