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Subject = Sea water;
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Displaying Results 1 - 2 of 2 on page 1 of 1
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A comparison of sampling methods for seawater microplastics and a first report of the microplastic litter in coastal waters of Ascension and Falkland Islands
(2018)
Crowley, Quentin; Green, Danielle S.; Kregting, Louise; Boots, Bas; Blockley, David J.;...
A comparison of sampling methods for seawater microplastics and a first report of the microplastic litter in coastal waters of Ascension and Falkland Islands
(2018)
Crowley, Quentin; Green, Danielle S.; Kregting, Louise; Boots, Bas; Blockley, David J.; Brickle, Paul; da Costa, Marushka
Abstract:
To date there is no gold standard for sampling microplastics. Zooplankton sampling methods, such as plankton and Neuston nets, are commonly used to estimate the concentrations of microplastics in seawater, but their ability to detect microplastics is limited by their mesh size. We compared different net-based sampling methods with different mesh sizes including bongo nets (>500??m), manta nets (>300??m) and plankton nets (>200??m and >400??m) to 1?litre bottle grabbed, filtered (0.45??m) samples. Concentrations of microplastics estimated using net-based methods were ~3 orders of magnitude less than those estimated by 1?litre grab samples. Some parts of the world with low human populations, such as Ascension Island and the Falkland Islands, lack baseline data on microplastics. Using the bottle grab sampling method we found that microplastic litter was present at these remote locations and was comparable to levels of contamination in more populated coastal regions, such as...
http://hdl.handle.net/2262/91216
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Can biosecurity and local network properties predict pathogen species richness in the salmonid industry?
(2019)
Yatabe, Tadaishi; More, Simon John; Geoghegan, Fiona; et al.
Can biosecurity and local network properties predict pathogen species richness in the salmonid industry?
(2019)
Yatabe, Tadaishi; More, Simon John; Geoghegan, Fiona; et al.
Abstract:
Salmonid farming in Ireland is mostly organic, which implies limited disease treatment options. This highlights the importance of biosecurity for preventing the introduction and spread of infectious agents. Similarly, the effect of local network properties on infection spread processes has rarely been evaluated. In this paper, we characterized the biosecurity of salmonid farms in Ireland using a survey, and then developed a score for benchmarking the disease risk of salmonid farms. The usefulness and validity of this score, together with farm indegree (dichotomized as 1 or > 1), were assessed through generalized Poisson regression models, in which the modeled outcome was pathogen richness, defined here as the number of different diseases affecting a farm during a year. Seawater salmon (SW salmon) farms had the highest biosecurity scores with a median (interquartile range) of 82.3 (5.4), followed by freshwater salmon (FW salmon) with 75.2 (8.2), and freshwater trout (FW trout) far...
http://hdl.handle.net/10197/10109
Displaying Results 1 - 2 of 2 on page 1 of 1
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Trinity College Dublin (1)
University College Dublin (1)
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2019 (1)
2018 (1)
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