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, Our study demonstrates the efficacy of combining multiple biogeochemical tracers to improve HAB monitoring efforts and identify the main routes of DA transfer across habitats and trophic levels.Barbara K. Collectively, our results show that DA was produced a few kilometers from the coastline, and anchovies were the most powerful DA vector in coastal-pelagic zones (their DA loads exceeded the 20 ppm FDA regulatory limits for human consumption), while mussels did not contain detectable DA and only reflect in situ DA, δ 13C, and δ 15N values. Low in the liver of stranded sea lions and their generalist foraging tendencies limits our ability to use them as sentinels for DA outbreaks in a specific geographic area. In contrast, krill, market squid, and juvenile rockfish accumulated minimal DA and had comparatively broad isotopic niches, suggesting a lower capacity to serve as vectors because of potential differences in diet or feeding in isotopically distinct locations. The narrow overlapping isotopic niches between anchovies and sardines suggest similar diets and trophic positions, but striking differences in indicate a degree of specialization, thus, resource partitioning. Our results highlight an inshore-offshore variation in krill δ 13C values and DA concentrations ( ppm) in anchovies indicating differences in coastal productivity and DA accumulation. Tissue samples were collected from 27 species across three habitats in the summer of 20 (time periods without prominent HABs). This study combines stable isotopes of carbon (δ 13C) and nitrogen (δ 15N) from bulk muscle tissue with DA measurements from viscera to identify the foraging strategies of important DA vectors and predators in Monterey Bay, CA. Given the effects of harmful algal blooms (HABs) on human and wildlife health, understanding how domoic acid (DA) is accumulated and transferred through food webs is critical for recognizing the most affected marine communities and predicting ecosystem effects.

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