breeding practices of juveniles salmons in the rhine€¦ · pisciculture petite camargue...
TRANSCRIPT
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Breeding practices of juveniles salmons in the Rhine
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Salmon farms location
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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
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First step, salmon on spawning migration are caught in Iffezheim/Gambsheim
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Some injuries can be caused by traps design problems, travel obstacles and will live more storage difficulties
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Wild fish storage in Obenheim before spawning
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Storage will last from february to december in cold water conditions
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The small number of returning salmon require creationof landlocked salmons F1
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F1 farmed salmon will stay one year in tanks until smoltification
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Two groups will reread in each farms to avoid a break in case of problems.
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Pre smolts will storage in cage early spring after one year growing in tanks
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Smolts will grow 1 or 2 years in polar circle structures located in freshwater system
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Polar circles close to Petite Camargue and Saumon du Rhin fish farms
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Polymer tagging help to manage broodstock groups
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Genetic organization of landlocks spawners in 2012
500
350
250
F1 Rhin 2+
F1 Rhin 3+
F1,5 allier 3+
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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
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Artificial spawning results are not steady, interaction between various factors can affect these
results
Storage and spawning temperatures Quality food
Broodstock age Swimming effect
…..
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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
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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
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F1 Rhin experiment module in EDF hydropower
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Same structure is used to keep wild and F1 salmons in Obenheim,cause missing tanks.
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Genetic monitoring during spawning for Swiss
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Nurseries
©J.WITT/SIPA PRESS
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Hatching by night
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©M.ROGGO
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Yolk resorbed fry stocking
Transfert in feeding structure
Exit from nursery and two directions:
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Feeding structures until june
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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
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Alevinage
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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
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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
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Electrofishing
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Result from electrofishing
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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
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Thanks for your attentionand hope for a definitive comeback…