A cost-benefit analysis of four treatment regimes for the invasive tunicate Ciona intestinalis on mussel farms

Davidson, John D.P.; Landry, Thomas; Johnson, Gerald R.; Quijón, Pedro A.

doi:10.3391/mbi.2017.8.2.04

Cited by 3 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Hayward (1997) and Hayward et al (1999) attributed major environmental changes in Waitemata Harbour, Auckland, to M. gigas and Arcuatula senhousia. NIS biofouling also has detrimental effects on growth and condition of cultured shellfish, as well as appearance, marketability, and production costs (Fitridge et al, 2014;Forrest et al, 2014;Davidson et al, 2017). According to Soliman and Inglis (2018), the projected impacts of S. clava and S. spallanzanii over 24 years would be approximately 4% of New Zealand's total green-lipped mussel (Perna canaliculus) industry revenue.…”

Section: Long-term Managementmentioning

confidence: 99%

Regulating Vessel Biofouling to Support New Zealand’s Marine Biosecurity System – A Blue Print for Evidence-Based Decision Making

et al. 2020

View full text Add to dashboard Cite

A healthy marine environment is integral to numerous New Zealand economic, social, and cultural values, including fisheries, aquaculture, tourism, and recreational and customary activities. The introduction and spread of marine non-indigenous species (NIS) via the vessel biofouling pathway may put these values at risk. Over the past two decades, the Ministry for Primary Industries (MPI) has been proactive in commissioning research focused on the risks associated with vessel biofouling, identification of potential risk vessels, and risk management options. In 2010, MPI consulted on options to manage the biofouling risks on all vessels entering New Zealand waters. In 2014, New Zealand became the first country to introduce mandatory biofouling requirements. Between 2014 and 2018, MPI focused on communicating the requirements to support stakeholder awareness, readiness, and uptake. In parallel, MPI commissioned further research to investigate proactive and reactive approaches to biofouling management. Research outcomes were summarized and technical advice provided to inform stakeholders of what constitutes best biofouling management practices. This review summarizes MPI's research and technical advice on the risks associated with vessel biofouling and its management, and the procedures followed to produce New Zealand's biofouling regulations. The development of these regulations is also contextualized in terms of New Zealand's marine biosecurity system. The transparent and evidencebased approach followed by MPI provides a blueprint for establishing biofouling regulations. Because these regulations are aligned with the International Maritime Organization guidelines, there is the potential to develop consistent global and domestic practices for managing marine NIS introduction and spread.

show abstract

Section: Long-term Managementmentioning

confidence: 99%

Regulating Vessel Biofouling to Support New Zealand’s Marine Biosecurity System – A Blue Print for Evidence-Based Decision Making

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The bivalve Mytilus galloprovincialis has caused ecological impacts in South Africa, including species displacement and increased intertidal biomass (Robinson et al, 2005;Hanekom, 2008). Further, NIS biofouling on cultured shellfish has detrimental effects on growth and condition as well as appearance, marketability, and production costs (Fitridge et al, 2014;Forrest et al, 2014;Davidson et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Vessel In-Water Cleaning or Treatment: Identification of Environmental Risks and Science Needs for Evidence-Based Decision Making

Scianni¹,

Georgiades

2019

Front. Mar. Sci.

View full text Add to dashboard Cite

The accumulation of aquatic organisms on the wetted surfaces of vessels (i.e., vessel biofouling) negatively impacts worldwide shipping through reductions in vessel performance and fuel efficiency, and increases in emissions. Vessel biofouling is also a potent mechanism for the introduction and spread of marine non-indigenous species. Guidance and regulations from the International Maritime Organization, New Zealand, and California have recently been adopted to address biosecurity risks, primarily through preventive management. However, appropriate reactive management measures may be necessary for some vessels. Vessel in-water cleaning or treatment (VICT) has been identified as an important tool to improve operating efficiency and to reduce biosecurity risks. VICT can be applied proactively [i.e., to prevent the occurrence of, or to remove, microfouling (i.e., slime) or prevent the occurrence of macrofouling organismslarge, distinct multicellular organisms visible to the human eye], or reactively (i.e., to remove macrofouling organisms). However, unmanaged VICT includes its own set of biosecurity and water quality risks. Regulatory policies and technical advice from California and New Zealand have been developed to manage these risks, but there are still knowledge gaps related to the efficacy of available technologies. Research efforts are underway to address these gaps in order to inform the regulatory and non-regulatory application of VICT.

show abstract

“…In long-line mussel farming, the fouling of mussel socks and gear by tunicates, a marine invertebrate species, can impede mussel growth, decrease yield, and reduce overall farm productivity [1]- [4]. Ciona intestinalis are widely considered to be the most problematic of the tunicates in mussel farming due to their rapid proliferation and biomass [1], [3]. Aquaculture industries in The Netherlands, New Zealand, and particularly Prince Edward Island (PEI), Canada, are plagued by Ciona; having the ability to displace other invasive tunicates, such as Styela clava [1], [4].…”

Section: Introductionmentioning

confidence: 99%

“…In response to the Ciona problem, an above-water highpressure treatment system, depicted in Figure 1, has been in use for several years [3], but this design has several significant limitations. Current mitigation systems do remove substantial Ciona biomass, but they also introduce avoidable mussel fall-off, as the force of water jets can exceed the tensile strength of the mussels' byssal threads.…”

Section: Introductionmentioning

confidence: 99%

The Ciona17 Dataset for Semantic Segmentation of Invasive Species in a Marine Aquaculture Environment

Galloway¹,

Taylor

Ramsay³

et al. 2017

2017 14th Conference on Computer and Robot Vision (CRV)

View full text Add to dashboard Cite

An original dataset for semantic segmentation, "Ciona17", is introduced, which to the best of the authors' knowledge, is the first dataset of its kind with pixel-level annotations pertaining to invasive species in a marine environment. Diverse outdoor illumination, a range of object shapes, colour, and severe occlusion provide a significant real world challenge for the computer vision community. An accompanying groundtruthing tool for superpixel labeling, "Truth and Crop", is also introduced. Finally, we provide a baseline using a variant of Fully Convolutional Networks, and report results in terms of the standard mean intersection over union (mIoU) metric.

show abstract

A cost-benefit analysis of four treatment regimes for the invasive tunicate Ciona intestinalis on mussel farms

Cited by 3 publications

References 9 publications

Regulating Vessel Biofouling to Support New Zealand’s Marine Biosecurity System – A Blue Print for Evidence-Based Decision Making

Regulating Vessel Biofouling to Support New Zealand’s Marine Biosecurity System – A Blue Print for Evidence-Based Decision Making

Vessel In-Water Cleaning or Treatment: Identification of Environmental Risks and Science Needs for Evidence-Based Decision Making

The Ciona17 Dataset for Semantic Segmentation of Invasive Species in a Marine Aquaculture Environment

Contact Info

Product

Resources

About