13 november 2012

Wiederherstellung der Durchgangigkeit für Fische in der Maas

André Breukelaar

RWS Waterdienst

Oedt 13 november 2012

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2 13 november 2012

Einmündung der Niers in der Maas

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3 13 november 2012

Weir Sambeek

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4 13 november 2012

Fishpass Sambeek

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5 13 november 2012

Fishpass Sambeek

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6 13 november 2012

Fishpass Sambeek

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7 13 november 2012

Haringvlietdam

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8 13 november 2012

Haringvliet sluices

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9 13 november 2012

Migration of salmon and sea trout in the Rhine delta

Some background

Rhine Action Programme / Salmon 2000

research objectives:

What are the migration routes from sea to the spawning sites?

What is the efficiency of fish passes in the Netherlands?

Which factors influence the migration of salmonids?

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10 13 november 2012

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11 13 november 2012

Salmon fishing

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12 13 november 2012

Local market

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13 13 november 2012

Salmonid catches 1875 – 1950. Much disputed graph of Dr. S.J. de Groot, IMARES, IJmuiden.

0

50000

100000

150000

200000

250000

300000

1875 1880 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1940 1945 1950

Nederland

Duitsland

Totaal

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14 13 november 2012

Salmon stocking

1850-1870: 10 million juvenile salmon stocked in Germany;

1871-1912: 160 million juvenile salmon stocked in Germany and Switzerland;

1872-1897: 13,5 million parrs and 300.000 smolts stocked in the Netherlands;

1879: first tagging experiments with salmon;

12.000 tagged smolts released, 1 returnee on 332 smolts stocked.

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15 13 november 2012

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16 13 november 2012

Detection stations

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17 13 november 2012

Migration of salmonidsperiod 1996 – 2000

Back tot 1996 – 2000.

RWS Waterdienst commissioned installation of the NEDAP trail system®.

Salmon and sea trout were caught near river entrances and sluices and tagged with NEDAP transponders.

Inland migration was followed.

Rijkswaterstaat

18 13 november 2012

Migration of salmonidsperiod 1996 – 2000

Back tot 1996 – 2000.

RWS Waterdienst commissioned installation of the NEDAP trail system®.

Salmon and sea trout were caught near river entrances and sluices and tagged with NEDAP transponders.

Inland migration was followed.

Rijkswaterstaat

19 13 november 2012

Migration of salmonidsperiod 1996 – 2000

Back tot 1996 – 2000.

RWS Waterdienst commissioned installation of the NEDAP trail system®.

Salmon and sea trout were caught near river entrances and sluices and tagged with NEDAP transponders.

Inland migration was followed.

Rijkswaterstaat

20 13 november 2012

Migration of salmonidsperiod 1996 – 2000

Back tot 1996 – 2000.

RWS Waterdienst commissioned installation of the NEDAP trail system®.

Salmon and sea trout were caught near river entrances and sluices and tagged with NEDAP transponders.

Inland migration was followed.

Rijkswaterstaat

21 13 november 2012

Evaluation of the fish pass near Sambeek on the Meuse

Research goals:

�To find out what the efficiency of the fish pass is for salmonids;

�The extend of use of the shipping locks for migration of salmonids.

During three years of research 96 salmonids (11 salmon, 84 sea trout and 1 rainbow trout) were caught downstream of Lith (most downstream barrier on the river Meuse) and tagged with NEDAP transponders.

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22 13 november 2012

Evaluation of the fish pass near Sambeek on the Meuse

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23 13 november 2012

Evaluation of the fish pass near Sambeek on the Meuse

Weirs

Shipping locks

Fish pass

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24 13 november 2012

1 = detection station Balgoij; 5 = detection station fish pass;

2 = weir Grave; 6 = detection station Afferden

3 = Cuijk (release location);

4 = detection station Sambeek (weir);

Schematic diagram of the research area

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25 13 november 2012

A: fish that, after release, directly migrated through the fish pass (49);

B: fish outside research area (4) and fish that first migrated downstream (5);

C: fish outside research area that could not pass the weir at Grave (3);

D: fish that migrated downstream after being released (27);

E: fish outside research area that migrated downstream (22);

F: fish that were not detected after release (11).

Possible migration scenarios in research area

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26 13 november 2012

Results:

Starting with 96 fish at release point 3:

11 fish were never detected downstream or upstream (tagging or fisheries mortality?);

27 fish only detected on station 1: migrated downstream (not motivated?);

58 fish migrated upstream and were detected on station 4: all passed successfully!

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27 13 november 2012

0:00:00

4:00:00

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28:00:00

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1 2 3 4 5 6 7 8 9 10 11 12 13

serial number registrated fish

se

arc

h t

ime

(h

ou

rs)

Time to find the fish way

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0:00:00

4:00:00

8:00:00

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1 5 9 13 17 21 25 29 33 37 41 45

serial number registrated fish

Passin

g t

ime (

ho

urs

)

Time to detection upstream near Afferden

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29 13 november 2012

Evaluation of the fish pass near Sambeek on the Meuse

Some other conclusions:

�Of the 58 fish that passed successfully, 5 fish were not detected in the fish pass. It was assumed that these fish passed via the shipping locks;

�Within 25 hours 2/3 of the fish detected downstream finds the entrance of the fish pass;

�Within the next 24 hours almost all fish succeed in reaching the detection station upstream of Sambeek;

�There is no relationship between successful passage and factors like time, discharge, flow velocity, temperature, weight and length of the fish;

�Overall migration speed (in days) is positively correlated with condition index of the fish;

�Migration delay at Sambeek is several hours up to 2 days. We conclude that this is not problematic.

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30 13 november 2012

species

• Lachs

• Meerforelle

• Smolts

• Schnäpel

• Aland

• Nase

• Barbe

• Brachsen

• Zander

• Aal

• Meerneunauge

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31 13 november 2012

Thank you for your attention