Abstract
Blooms of domoic acid (DA) synthesizing diatoms ( Pseudo-nitzschia spp.) have been associated with the death and injury of hundreds of marine shorebirds and mammals, exposed humans to potentially serious health risks, and threatened to significantly impact coastal fisheries and commerce dependent on marine resources. While indicator organisms are widely utilized to monitor for marine biotoxins like paralytic shellfish poisoning toxins, a reliable intertidal indicator species to monitor DA remains to be identified. Here we evaluate and confirm the utility of the common sand crab ( Emerita analoga) as an indicator for DA in comparison with sea mussels ( Mytilus californianus). Mussels and sand crabs, collected from natural populations in Santa Cruz, California (April 1999–February 2000), were tested for DA using the HPLC–UV method. Toxin loads in sand crabs ranged from below detectable limits to 13.4 μg DA g −1 and coincided with the abundance of DA producing Pseudo-nitzschia species nearshore. Toxin levels in mussels collected during the study period were below HPLC–UV detectable limits. The rise and fall of DA in sand crabs in synchrony with Pseudo-nitzschia abundance, combined with this common intertidal species' accessibility and ease of DA extraction, clearly indicate the utility of sand crabs as a reliable, cost-effective monitoring tool for DA in the nearshore coastal environment.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.