The 2010 Deepwater Horizon (DWH) oil spill affected ecologically important organisms throughout all trophic levels.
In conclusion, there were substantial cardiac abnormalities identified in BB dolphins which may be related to DWH oil exposure, however, future work is needed to rule out other hypotheses and further elucidate the connection between oil exposure, pulmonary disease, and the observed cardiac abnormalities. Histopathology of dolphins who stranded within the DWH oil spill footprint showed a significantly higher prevalence of myocardial fibrosis ( p = 0.003), regardless of age, compared to dolphins outside the oil spill footprint. Two dolphins in BB were diagnosed with pulmonary arterial hypertension based on Doppler echocardiography-derived estimates and supporting echocardiographic findings. BB dolphins also had smaller left atrial size ( p = 0.004), higher prevalence of tricuspid valve prolapse ( p = 0.003), higher prevalence of tricuspid valve thickening ( p = 0.033), and higher prevalence of aortic valve thickening ( p = 0.008). Echocardiography showed BB dolphins had thinner left ventricular walls, with significant differences in intraventricular septum thickness at the end of diastole ( p = 0.002), and left ventricular posterior wall thickness at the end of diastole ( p = 0.033). Telemetric six-lead electrocardiography detected arrhythmias in BB dolphins (43%) and SB dolphins (31%), all of which were considered low to moderate risk for adverse cardiac events. Cardiac auscultation detected systolic murmurs in the majority of dolphins from both sites (88% BB, 89% SB) and echocardiography showed most of the murmurs were innocent flow murmurs attributed to elevated blood flow velocity. Navy Marine Mammal Program in 2018 and applied to free-ranging bottlenose dolphins in BB ( n = 34) and Sarasota Bay, Florida (SB) ( n = 19), a non-oiled reference population. To comprehensively assess the cardiac health of dolphins living within the DWH oil spill footprint, techniques for in-water cardiac evaluation were refined with dolphins cared for by the U.S. The Deepwater Horizon (DWH) oil spill profoundly impacted the health of bottlenose dolphins ( Tursiops truncatus) in Barataria Bay, LA (BB). Smith, Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Writing – review & editing Schwacke, Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Writing – review & editing,Īnd Cynthia R.
Jensen, Investigation, Resources, Supervision, Writing – review & editing, Wells, Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing,Įric D. Zolman, Conceptualization, Investigation, Methodology, Supervision, Writing – review & editing,
Musser, Data curation, Formal analysis, Investigation, Writing – review & editing,Įric S. Rowles, Conceptualization, Funding acquisition, Investigation, Supervision, Writing – review & editing, Deming, Investigation, Resources, Writing – review & editing, Harms, Data curation, Formal analysis, Investigation, Methodology, Resources, Writing – review & editing,Īshley Barratclough, Data curation, Formal analysis, Investigation, Writing – review & editing,Īlissa C. Colegrove, Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Writing – review & editing,Ĭraig A. Ryan Takeshita, Data curation, Formal analysis, Software, Writing – review & editing, Huston, Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Writing – review & editing,Īdonia Hsu, Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – review & editing,
Gomez, Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing, Linnehan, Data curation, Formal analysis, Investigation, Methodology, Project administration, Writing – original draft, Writing – review & editing,
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