River Awe salmon recruitment. Alan Kettle-White

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River Awe salmon recruitment Talk provided for the annual Scottish Fisheries Co-ordination Centre Meeting. Held at the Scottish Centre for Ecology and the Natural Environment, Loch Lomond. 4th-5th Feb 2015

River Awe salmon recruitment
SFCC February 2015

Improving Recruitment of salmon
River Awe Project – Monitoring
 Fish passage (counter data)
 Fry surveys (June and October)
 Redd counts (Autumn)
 Spawning habitat restoration

River Awe Project
Response of fish to habitat improvement
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50
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2002 2010 2012 2013 2014
Min.FishDensity
Site 11 - Caravan Park
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Project
Response of fish to habitat improvement
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2012 2013 2014
Min.FishDensity
Site 9a - Old Bridge of Awe - LB Braid
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Project
Response of fish to flow changes
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2007 2010 2012 2013 2014
Min.FishDensity
Site 4 - Stepping Stones
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Project
Response of fish to flow changes
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2012 2013 2014
Min.FishDensity
Site 3a - Upper Inverawe
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Project
Response of fish to flow changes
0
20
40
60
80
100
120
140
2002 2005 2007 2010 2012 2013 2014
Min.FishDensity
Site 2 - Lower Inverawe
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Project
Response of fish to flow changes
0
10
20
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40
50
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2012 2013 2014
Min.FishDensity
Trout parr
Trout fry
Salmon parr
Salmon fry

River Awe Fish Counter
MID JULY EARLY SEPT MID OCT

ORAL PRESENTATION AQUACULTURE EUROPE 2017 For many years, we have managed our land and sea as isolated components of the total ecosystem. Great investments have been made in the optimization of monocultures systems. Policy and legislation are targeted to manage single use activities within a specific area. But there is now a better understanding and the will to maximize the value from unit area of sea. In this study, we present the first steps towards developing seaweed aquaculture in Milford Haven Port using derelict structures. Milford Haven is the largest trust port in Wales, and the port authority re-invests any profits to support the long-term viability of the port. The Milford Haven Waterway is situated within the Pembrokeshire SAC (Special Area of Conservation), who is responsible for enforcing the EU Habitats Directive. Recent closure of local oil refinery has created economic hardship and left behind derelict coastal structures. The Milford Haven Port Authority (MHPA) aspires to transform the traditional ‘high carbon’ economy into new ‘low carbon’ economy by developing sustainable aquaculture in the waterway and surrounding grounds. The Port has the infrastructure and welcomes aquaculture businesses – one of the fastest and successful industries worldwide. In this study, we did a preliminary inventory of unused structures suitable for building a rope platform that would also provide appropriate environmental conditions for seaweed growth. This oral presentation will focus on the challenges and opportunities of growing Saccharina latissima in a Port environment nearby a busy ferry traffic route.

TESTING THE LOW OCTANE DIET TO KEEP LUMPFISH SMALL: AQUACULTURE EUROPE 2017:

Sara Barrento

ORAL PRESENTATION AQUACULTURE EUROPE 2017 The lumpfish (Cyclopterus lumpus) is a novel aquaculture species. Unknown to most consumers – the watery gelatinous flesh is only appreciated in Nordic countries. Lumpfish are also effective cleaner fish which prey on the ectoparasite copepods - Lepeophtherius salmonis, commonly known as sea-lice (Powell et al., 2017). Until recently, the only option for delousing was using medicines but sea-lice developed resistance and there are very few compounds licensed for use. Having lumpfish in the salmon cages eating the sea-lice has become an attractive and environmentally friendly alternative (Imsland et al. 2014). For most farmed fish, the main goal is to grow fish fast and with a high Feed Conversion Rate, because the end product is fish biomass. But the purpose of using lumpfish in aquaculture is to delouse salmon. So, lumpfish are traded not in weight. but in number of individuals of a specific size – around 11 g - if they are too big they become ineffective at delousing salmon. So, the challenge is to stop lumpfish growing too quickly, but without compromising their welfare. In this study, we compared the growth performance and welfare of lumpfish fed two commercial diets. One of the diets, is currently marketed as” low octane” formula with reduced protein/fat levels for controlled post vaccination.

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Updates on aquaculture structures in Taal Lake

Tanggol Kalikasan

Monitoring the fish community is already a challenging feat even on the clearest of days and in the easiest of conditions. Data collection can be time and cost intensive, water clarity can be dismal, methods to actively monitor fishes continue to grow more restrictive, and species are being categorized as imperiled across the world every year. These conditions make passive monitoring methods even more attractive in the evolving world of fisheries. In 2003, FISHBIO incorporated the Vaki Riverwatcher, an infrared camera monitoring system, into their repertoire of sampling methods to monitor adult fish passage at weirs. Over the past 12 monitoring seasons, FISHBIO and Vaki have worked together to fine-tune, adapt, and evolve the Riverwatcher into a highly effective passive monitoring tool. This technology is currently deployed on several rivers throughout the Pacific Northwest. It can be adapted to fit into several structures including fish ladders and other passageways. Data from the Riverwatcher can be used to characterize fish passage by species, lengths, and sex even in turbid water. This tool continues to be beneficial in the long-term data collection of the fish community and has proven to be an effective application for fisheries management.

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