Location
Groningen, The Netherlands
Event Website
http://fishpassage.umass.edu/
Start Date
22-6-2015 2:30 PM
End Date
22-6-2015 2:45 PM
Description
Abstract:
In 2007 a LIFE+ project aiming at the reintroduction of the allis shad to the Rhine system started by Rheinische Fischereiverband 1880e.V. and partners. Between 2008 and 2012 about eight million shad larvae were produced and transported to Germany where they have been released in the Hessian and North Rhine-Westphalian parts of the Rhine basin. In 2014, the first year after a 4 to 5 years period in the sea, hundreds of Allis Shad have been recorded returning to the Rhine system for spawning. In order to form the basis for a future allis shad stock in the Rhine, and to develop a natural stock in the long term, monitoring will be continued until at least 2015. After 2015 it seems that stocking is also needed to maintain a self-sustaining population. The presentation will focus on what methods were used, e.g. for the purpose of sustaining the wild stocks, breeding stocks have been established in which the conditions of successfully keeping shads in captivity are studied in order to enable the fish to reach maturity in captivity. Such ex situ stocks are to breed offspring for stocking purposes and to successively reduce the impact on the wild stocks.
Discussion:
-What lessons can we learn from this success story, e.g comparing the Allis Shad project with the Smolts project.
-How many more years of stocking and monitoring will be needed?
-How can WFD norms for migratory fish stocks (mainly high flow river upstream, R1) be attained in the Rhine Delta (low-flow rivers downstream?
What is realistically attainable?
Session E2: Cross Border Practical and Applied Experiences with Germany; the Alosa Alosa LIFE(+) Project
Groningen, The Netherlands
Abstract:
In 2007 a LIFE+ project aiming at the reintroduction of the allis shad to the Rhine system started by Rheinische Fischereiverband 1880e.V. and partners. Between 2008 and 2012 about eight million shad larvae were produced and transported to Germany where they have been released in the Hessian and North Rhine-Westphalian parts of the Rhine basin. In 2014, the first year after a 4 to 5 years period in the sea, hundreds of Allis Shad have been recorded returning to the Rhine system for spawning. In order to form the basis for a future allis shad stock in the Rhine, and to develop a natural stock in the long term, monitoring will be continued until at least 2015. After 2015 it seems that stocking is also needed to maintain a self-sustaining population. The presentation will focus on what methods were used, e.g. for the purpose of sustaining the wild stocks, breeding stocks have been established in which the conditions of successfully keeping shads in captivity are studied in order to enable the fish to reach maturity in captivity. Such ex situ stocks are to breed offspring for stocking purposes and to successively reduce the impact on the wild stocks.
Discussion:
-What lessons can we learn from this success story, e.g comparing the Allis Shad project with the Smolts project.
-How many more years of stocking and monitoring will be needed?
-How can WFD norms for migratory fish stocks (mainly high flow river upstream, R1) be attained in the Rhine Delta (low-flow rivers downstream?
What is realistically attainable?
https://scholarworks.umass.edu/fishpassage_conference/2015/June22/46
Comments
Presenting Author Bio: Gerard is a Senior Project Manager Sportvisserij Nederland. Fish habitat suitability research, monitoring, tracking surveys, consultant for angling clubs. Specialist in stocking Salmon smolts and Allis Shad.