Leading producer of responsibly-farmed salmon, Scottish Sea Farms, is
seeing one of its current crops outperform all previous years following the
introduction of new anti-sea lice shields.
The new shields are the latest in a series of proactive, preventative
measures by the company to enhance the health and welfare of the salmon under
its care.
www.scottishseafarms.com |
Specially engineered to suit Scottish marine conditions, each shield
consists of a permeable fabric that lets water and oxygen move freely into fish
pens whilst keeping natural health threats out. This fabric fully encases the
pen to a depth of 6m, providing a barrier against sea lice which are most
commonly found in the first few metres below the water’s surface.
The new shields were first introduced at the company’s farm at Slocka,
Ronas Voe on Shetland in May 2017. In the nine months since, sea lice levels
have successfully remained below the Marine Scotland Code of Good Practice
threshold, and the salmon are showing strong growth and biological performance.
Such has been the effectiveness of the shields that Scottish Sea Farms
has now invested over £800,000 with two Scottish suppliers – William Milne
Tarpaulins in Aberdeen and W&J Knox in Ayrshire – in order to roll-out
similar protection to 11 of its other farms.
The company is also working with neighbouring salmon growers to
synchronise use of the shields, as part of a farm management agreement for
those same areas.
Jim Gallagher, Managing Director of Scottish Sea Farms, commented, “We
strive, wherever possible, to replicate the natural conditions that salmon are
known to thrive in. As any farmer will understand however, this comes with its
own risks as the marine environment presents new challenges all the time. We
are continually exploring and investing in new ways of dealing with these
challenges, and it’s hugely encouraging to see positive early results such as
these at our trial project in Shetland.”
This latest advance is part of a wider £11.8m investment in 2017 by the company
to enhance the health and welfare of its salmon – over 85 percent of which is
being spent on non-medicinal approaches.
In terms of controlling the sea lice challenge specifically, key areas
of investment include:
- More than doubling the use of cleaner fish,
so-called because they ‘clean’ salmon by eating any sea lice, in the last
year – 76 percent of which are now from farmed origin, keeping the company
on track to use farmed-only stocks by 2020
- Developing a new net cleaning pressure pump to
keep pens free from marine build-up, simultaneously enhancing fish health
and welfare and increasing the effectiveness of cleaner fish
- Ongoing investment to increase understanding of
cleaner fish, with the insights gleaned being shared with the wider
industry
- Co-funding new Thermolicer technology that bathes
salmon in such a way as to dislodge and catch sea lice, with up to 95
percent effectiveness.
In turn, the need to administer medicines has significantly reduced,
with six of the company’s farms requiring no sea lice interventions at all
during 2017.
The company’s investment in health and welfare doesn’t stop there.
With the UN reporting that the last three years were the hottest ever on
record, and Scotland’s rising sea temperatures resulting in new planktonic
organisms that are potentially harmful to the health of fish gills, the company
has also invested approximately £200,000 in state-of-the-art environmental data
monitoring equipment, as well as over £260,000 on new underwater camera
systems.
Ralph Bickerdike, Head of Fish Health and Welfare at Scottish Sea
Farms, said, “Even a seemingly slight increase in sea water temperatures of 0.5
degrees can have an impact on the marine environment. This new data monitoring
equipment is enabling real-time analysis of key markers such as salinity and
oxygen concentration, helping us to make informed decisions to maintain high
standards of welfare for the fish under our care.
Visit the Scottish Sea Farms website, HERE.
The Aquaculturists
This blog is maintained by The Aquaculturists staff and is supported by the
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