Breeding practices of juveniles salmons in the Rhine

Salmon farms location

Rhine

Fish Farm Petite Camargue (Saint-Louis, F )

Landlocked broostockRhine (F1)

3000 eggs

Fish FarmSaumon du Rhin

(Obenheim, F)

Landlocked broostockRhine (F1)

3000 eggs

Fish FarmWolftal (D,

Building LL broodstock F1

10 000 fry

Rhine (F and D)

Rhine (F and CH)

Fish FarmChanteuges(Loire Allier , F)

Fish Farm Saumon du Rhin (Obenheim F, 67)

Spawning migrator fromRhine (F0)

Organisation and link between farmed

salmon structures

Juveniles F2

Juveniles F2,F1

First step, salmon on spawning migration are caught in Iffezheim/Gambsheim

Some injuries can be caused by traps design problems, travel obstacles and will live more storage difficulties

Wild fish storage in Obenheim before spawning

Storage will last from february to december in cold water conditions

The small number of returning salmon require creationof landlocked salmons F1

F1 farmed salmon will stay one year in tanks until smoltification

Two groups will reread in each farms to avoid a break in case of problems.

Pre smolts will storage in cage early spring after one year growing in tanks

Smolts will grow 1 or 2 years in polar circle structures located in freshwater system

Polar circles close to Petite Camargue and Saumon du Rhin fish farms

Polymer tagging help to manage broodstock groups

Genetic organization of landlocks spawners in 2012

500

350

250

F1 Rhin 2+

F1 Rhin 3+

F1,5 allier 3+

Genetic distribution of broodstock and reared fry

0

100000

200000

300000

400000

500000

600000

Nombre d'individus

Evolution des repeuplements en saumon en fonction de l'emploi des souches d'origine des géniteurs

Irlande

Danemark

Ecosse

Suède

Nive

Bretagne

Rhin cage

Rhin sauvage

Allier/Rhin

Allier

Artificial spawning results are not steady, interaction between various factors can affect these

results

Storage and spawning temperatures Quality food

Broodstock age Swimming effect

…..

Low F2 eggs production, impact to fry stocking disponibility

-

50 000

100 000

150 000

200 000

250 000

300 000

350 000 Production propre PCA Saint-Louis

Elevage complémentaire PCA Saint-Louis

Production totale Saint-Louis

Production annuelle moyenne : 146 200

-

50 000

100 000

150 000

200 000

250 000

300 000

19

95

19

96

19

97

19

98

19

99

20

00

20

01

20

02

20

03

20

04

20

05

20

06

20

07

20

08

20

09

20

10

20

11

20

12

20

13

20

14

Production propre SCEA ObenheimElevage complémentaire SCEA ObenheimProduction totale Obenheim

To produce more and stable number of eggs, farms needother storage structures and water process

Circular tanks

Cold water for storage/ spawning

Water process with sterilisation, degassing, oxygenation…

Important financial sponsoring to built structures

F1 Rhin experiment module in EDF hydropower

Same structure is used to keep wild and F1 salmons in Obenheim,cause missing tanks.

Genetic monitoring during spawning for Swiss

Nurseries

©J.WITT/SIPA PRESS

Hatching by night

©M.ROGGO

Yolk resorbed fry stocking

Transfert in feeding structure

Exit from nursery and two directions:

Feeding structures until june

1011 11

1314

16 16,5

0,214

0,27 0,5341,32

2,114

6,52

24

0

5

10

15

20

25

30

Températures

Poids moyens

F2 salmon grow curve in tanks between april and september

Alevinage

0

50000

100000

150000

200000

250000

199419951996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

13400

151000

108500

45500

93400

102400

123800

76150

141200

164300

208200

100000

170620

32700

114600

100400

115500

105180

127623

129600

Fry reared and stocking from PCA between 1994 to 2013

62800; 46%

25000; 18%

23100; 17%

25200; 19%

Vieux-Rhin amont

Thur

Doller

Fecht

Fry distribution in swiss and french rivers in 2014

5900; 16%

7500; 20%

11700; 32%

3200; 9%

5900; 16%

2800; 7%

Rhin BS

Aare AG

Rhin/Möhlinbach AG

Birs BS/BL

Wiese/Ergoltz BS/BL

Arisdöfersbach BL

Electrofishing

Result from electrofishing

Our technical partners

Association Saumon Rhin

EDF

Fédération de pêche du Haut-Rhin

Fédération de pêche du Bas-Rhin

Fischerreiaufsicht : Canton Bâle

Ville, Bâle Campagne, Aargau

OFEV

DE Landesfischerreiverband

Pisciculture Petite Camargue Alsacienne Pisciculture Saumon du Rhin

Thanks for your attentionand hope for a definitive comeback…