TO VIEW PRESENTATION CLICK ‘SLIDE SHOW’ TAB IN TOOLBAR ABOVE AND THEN CLICK ‘FROM BEGINNING’. USE FWD/BACK ARROWS ON YOUR KEYBOARD TO PROCEED THROUGH PRESENTATION.

The Lochy Smolt Programme

Jon Gibb RLA Hatchery and Restoration Manager

Sea lice management

HATCHERY

Habitat improvements Catch and release Although it plays a key role, the management of the Lochy is not just about stocking from the hatchery It is only one part of a myriad of activities to try and maximise salmon production – eg water flow management, Catch&Release, habitat restoration, poaching control, predator control, sea lice management

Practical Fishery Management River Lochy

LOCHABER STOCKING PROJECTS 2010

Facilities = Drimsallie Hatchery, (broodstock and all juvenile stages), 4 satellite hatcheries and 2 MH loch-based smolt farms

River Lochy

30,000 – 100,000 S1 indigenous smolts treated against sea lice infestation

River and Loch Shiel

Fed fry stocking management of local river systems. The Lochy’s Drimsallie Hatchery

River Ailort/Loch Eilt

Captive salmon broodstock programme Indigenous smolt stocking planned Fed fry stocking stocking strategies depending on a river’s requirements.

The Lochy smolt programme is just one, albeit the largest, of these.

Kingairloch Estate Ardtornish Estate

5 x Captive broodstock programmes

Conaglen Estate Braeroy Estate

8,000 indigenous S1 smolt stocking Captive broodstock programme 5 x indigenous fry stocking programmes

Kilchoan Estate

The aim is to stock 100,000 smolts for a continuous period of three years into the main stem of the Lochy. Already we are in the second year of a pilot study that has seen the stocking of up to 30,000 smolts pa. The results of this has given us the confidence to continue to the full project.

Producing such high volumes of fish is only possible due to the assistance of local fish farm company Marine Harvest. Broodstock are captured in the Lochy then their eggs are taken on to fry at Drimsallie Hatchery. These fry are then moved to the Marine Harvest farm in Lochy Arkaig at the top of the Lochy catchment. The fish are taken on to smolt in the loch and are released during the wild smolt migration the following spring.

The bulk of the smolts are released on the Lochy private beats by lorry but a proportion are also taken to the inaccessible headwaters by helicopter.

FRY v SMOLT?

FED FRY – 1g, 2cm long 2-3 years in the river There are huge advantages to stocking with smolt rather than much smaller and younger fry. The first is that the smolts do not eat the food in the river that is available for the wild-reared fish, thus protecting this part of the population. The second is that due to their size and age the survival rate through to adulthood is much higher with a smolt stocking strategy.

The one proviso is that in order to avoid a ‘genetic bottleneck’ the brood fish have to mixed thoroughly at spawning time in order to get the maximum amount of genetic variety in the next generation.

SMOLT – 45g, 12cm long 1 – 2 weeks in the river

That smolt release programmes have worked in other parts of the world is undisputed. The most famous is the Ranga in Iceland. This graph shows the early days of the Ranga programme. The latest figures for the Ranga show a release of one million smolts per annum producing a rod catch of 14,000 salmon!

However it is important to note that the Ranga is essentially an artificial system as it supports little natural salmon spawning habitat and the smolt survival rate in Iceland is much higher than in Scotland. The Ranga fishery also catch a very high percentage of their returning fish.

Breiðdalsá river Salmon catch statistic 1981 - 2006

1000

S a l m o n

900 800 700 600 500

c a t c h

400 300 200 100 The same fishery manager then went on to this Icelandic river and did the same thing

Smolt releasing programme started 1997

0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97

year Angling Service Strengir, Iceland

98 99 00 01 02 03 04 05 06

River Carron, Wester Ross

Fig.1: Carron Catch Stats Salmon/Grilse

200 180 160 140 120 100 80 60 40 20 0

Year

A bit closer to home though, Bob Kindness on the Carron in Wester Ross has used smolt stocking from 2001 onwards as part of his strategy to rapidly reverse the fortunes of this small west coast river.

Compare these results to a river closer to the Lochy – this is the graph from the River Awe Counter which is the only truly reliable measure of wild salmon runs in the Loch Linnhe region. It shows an alarming decline. The Awe recently closed its hatchery while the Lochy stocking has been increased. It will be a measure of the usefulness of the smolt stocking to compare these neighbouring major west coast rivers over the coming years.

600 400 200 0 1400 1200 1000 This adjusted graph shows that there used to be very little difference between the fortunes of the East and West coast rivers. From the late 1980’s onwards this changed. The west coast aquaculture industry was born in the late 1980’s.

While we have seen some recent improvements in the relationship, with east coast

Lochy beats 1-4

versus

Total Scottish Rod Catch

catches very abundant in 2010 and west coast stocks unimpressive at best it seems that the gap is becoming even wider.

It is clear therefore that there is a LOCAL west coast issue at play alongside all the well documented high seas issues that affect all scottish stocks.

800

THE PLIGHT OF OUR SALMON – are all the problems in the high seas?

Increase in predators – resident brown trout increasing/sea trout decreasing - common seals far too abundant - over-protected fish-eating birds Increase in winter spates – loss of juvenile habitat Increase in freshwater temperatures – change in resident/migratory fish - disruption to migratory timing Increase in spring droughts – disruption to smolt migration/ increased predation There are a whole host of factors that are likley to be influencing the Lochy stocks Forestry harvesting – heightened aluminium levels and run off profiles Is this strictly true? While we would agree that there are some serious feeding issues in the north norwegian sea, we also believe that the scottish west coast faces disruption to ease and timing of migration

Local fish farms

sea lice disease transfer interuption of salmons scenting/homing ability escapes/interbreeding

This is a map of the different fish farm areas on the west coast of Scotland separated into their management zones. The Lochy lies at the head of the biggest of these management zones

This is the distribution of fish farms in the north part of the west coast . Note also that the estuaries of rivers are not very long and face largely west or north west.

This is the distribution in the Lochy region – somewhat different! The estuary is also very long and thin and faces the prevailing wind to the South West. It is hardly surprising that sea lice and other fish farm impacts appear to be far worse in the Loch Linnhe region where 25% of scottish production is farmed. The Government has no intention of relocating these farms in spite of constant lobbying by wild fish groups including Lochy interests.

Towing the smolt run to sea - Norway

The same problem occurs in parts of Norway where sea lice from fish farms are thought to be having a serious impact on salmon stocks. On one river they have attempted to mitigate against that by running a smolt rearing programme and towing the smolts 60km past the fish farms before releasing them!

Here on the Lochy though we are taking a slightly different approach. Prior to release, the smolts (from 2010 onwards) are being treated with an anti sea lice chemical called SLICE which gives the smolts 5 weeks protection against lice infestation. We are also feeding them a product called Biomos which gives them an extra layer of ‘slime’ on the skin and thus an ‘armour plating’ against sea lice as well. Our partnership with local fish farm company Marine Harvest makes such innovative approaches possible.

RESULTS AND EXPECTATIONS

• 18,000 smolts released as a pilot study in 2009 Smolts not treated with SLICE and estuary was in 2 nd (usually bad for sea lice infestation) year of production • 20 fin clipped grilse from that release caught by anglers in 2010 Based on 10% catch ratio, this points towards around a > 1% survival rate from smolt to returning grilse (200 extra fish running) • Additionally we would expect perhaps another 0.4% of the 2009 smolt cohort to return as 2SW salmon in 2011, along with grilse from the SLICED 2010 release of 28,000 smolts • So unsliced smolts have given us an estimated 1.4% survival • Experiments in Norway and Ireland with SLICE treated smolts have seen increased smolt survival rates from untreated groups. Up to 3 fold increase • Therefore we expect a (conservative) future rate of 2.5% for Lochy sliced smolt releases (lesser rate of 1% for Dessary headwater releases ). 15%/10% rod exploitation rate expected for Lochy/Dessary returns

If we put all that together we get to the following predictions for the Lochy fishery. The aim is to gear up for 3 annual releases of 100,000 SLICE treated smolts and then assess the project’s success. The extra fish caught by rod that this should create 100,000

Released in Lochy rod catch.

DESSARY

18,000 UNSLICED 0 18,000 10,000 30,000 10,000 90,000 10,000 100,000 0 100,000 0 0

EXPECTED NO OF FISH RETURNING (grilse and salmon)

200 550 850 2350 2500 2500 2500

Some 2010 fin-clipped grilse

The rod-caught fin clipped grilse in 2010 ranged from 4lbs to 11.5lbs. Generally they were healthy fat fish. All bar one were caught on the private beats where they were released as smolts.

This is the longest rod catch data set available on the Lochy – it only shows 2 miles of the Upper Lochy. What is interesting is that it shows that the 1960’s and 70’s were a period of particular abundance relative to the last 100 years.

While it would be good to think we can revisit these 1970 levels we have to remain realistic.

That said, there appears to be no reason why we should not be capable of doubling the 600

1935-1957 data missing

current Lochy rod catch over the next few years with our smolt-release programme.

1st World War

500

Spean impounded for British Aluminium

400

Mucomir Power station built + fishpass installed

300 200 100 0

WINNER 2009 MALLOCH TROPHY Sandy Walker, Inverlochy AC 32lbs June 2009, River Lochy, tidal beat And with fish like this still running the river we should have every reason for hope. Where else can you catch fabulous fish like this in such private and stunning surroundings? While we can’t promise the increased numbers of fish will all be this size, we hope that you will come and join us next season and land a few of them with us.

Thank you! Jon Gibb, Lochy Restoration Manager