Knauss legislative fellowships in Congress help build careers — and they're fun and educational. See our video and fact sheet for details.
Research Publications: UM-SG-RS-2016-25
Title:
Vector management reduces marine organisms transferred with live saltwater bait
Year:
2016Authors:
Blakeslee, A; Fowler, A; Couture, J; Grosholz, E; Ruiz, G; Miller, AWSource:
Management of Biological Invasions 7 ( 4 ) : 389 - 398DOI:
10.3391/mbi.2016.7.4.08Abstract:
The global transfer of live bait creates a potent vector (mechanism) for invasion of marine species, including associated biota ("hitchhikers") not intended for shipment. Unlike other vectors of non-native species transfer in coastal marine systems (e.g., ship ballast water), vector management strategies to reduce transport of associated biota with live bait are lacking. In this study, we experimentally tested whether simple, inexpensive treatment methods could reduce hitchhiker abundance and richness with live bait shipments, using the Maine live baitworm trade as a model. The Maine bait industry ships locally-harvested polychaete worms and packing algae to coastal regions of the United States, Europe, and Asia, and may unintentionally transfer associated hitchhikers, including known invaders. We exposed packing algae to three osmotic shock treatments (tap water, hypersaline water, and tap + hypersaline water), and measured abundance and richness of all live and dead macroinvertebrate taxa, as well as the condition of baitworms, after shipment to two locations (Maryland and California). Compared to controls, experimental treatments lowered average abundances by up to 99% and up to 93% for richness, and appeared to have no negative effects on bait or algae quality. The simplest treatment, tap water, was statistically as effective as more complicated treatments in reducing associated biota. We suggest that simple osmotic shock treatments on live packing algae prior to shipping could reduce the prevalence of hitchhikers associated with live trade vectors both nationally and internationally with little impact on the respective industries or their stakeholders.
Open Access:
This article is freely available online. You can use the DOI number to find it through the journal's website or through a search engine.
Related Research Project(s) Funded by Maryland Sea Grant:
Maryland Sea Grant Topic(s):
'Related Research Project(s)' link to details about research projects funded by Maryland Sea Grant that led to this publication. These details may include other impacts and accomplishments resulting from the research.
'Maryland Sea Grant Topic(s)' links to related pages on the Maryland Sea Grant website.
Program Announcements
News and Blogs
Featured Fellow
Leone Yisrael is a cephalopod-loving scuba diver, cook, and loves to try new activities. She conducts genetic analysis and fieldwork at the Smithsonian Environmental Research Center through the Coastal Disease Ecology Lab.
Featured Research Project
Exploring the Use of Benthic Microbial Fuel Cells to Remove Sulfide While Harvesting Energy from Oyster Aquaculture Biodeposits
Oyster aquaculture is a rapidly growing industry in Maryland’s Chesapeake waters which stimulates economic activity and may provide a host of ecosystem benefits. A potential concern associated with the intensification of the oyster aquaculture is the local production and accumulation of oyster biodeposits, which can lead to a porewater sulfide accumulation and declining bioturbation, symptoms of declining ecosystem function. Sulfide is naturally removed from the seafloor by the interactions between bioturbating infauna and sulfide oxidizing bacteria.
Chesapeake Quarterly Magazine
A Growing Industry: Advancing Oyster Aquaculture in Maryland
