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Ins$tute for Agro-Environmental Sciences, NARO
1:
2: ( )
3:
China, the Korean Peninsula
100 µm
/
2
Impact on Water U/li/es System: Golden Mussel
(2013)
Environmental impact: Hydropsyche larvae
From Nakano & Strayer (2014)
(Invasive Alien Species Act)
⇒⇒ HP
Asian clam
golden mussel
Magara et al. 2001
Sampling locali,es and haplotype frequencies of L. fortunei
(Ito, 2015, Tominaga et al. 2009)
1980
2000
Tominaga et al. (2009)
The invasion and expansion process of golden mussel in Japan
Expansion of Golden Mussel in Lake Kasumigaura
2005 ( 2006)
2006 2012 46%⇒83% 3.8( & 2013)
(Ito 2015 )
present
absent
direction of water flow
( )man-made canals
( 2008, Ito 2015 ) 14
( 2007-2013)Distribution of golden mussel in Tone River Downstream Region (2007-2013)
Expansion of Golden Mussel via Canal: Kokai River
(2008)
(2011), Ito (2015)
Expansion of Golden Mussel via Canal: Edo River
Naka River system
Tone River system
Hinuma
(2014 )Introduction of golden mussel in Naka River system (2014~)
direction of water flow
( )man-made canals
18
X : Y
2009
2015 ( )
2012
(2015 )
: ⇒( 2016 )
2014 ( )
1~23‰(Sylvester et al. 2013)
20‰ (Matsui et al. 2018)
(Sylvester et al. 2013 )
( 2016 )
22
( )Reservoir where the golden mussel was found (Kasama pond)
( )Reservoir where the golden mussel was found (Kasama pond)
# 10the number of mussels collected in 10 min by a single researcher
110100
0
100 mN
( )Water inflow from Lake Kasumigaura
head gate
Distribution and abundance of the goldenmussel in Kasama pond.
(2016)
( 2016 )25
Fukuhara R.
Inada R.
Hinuma R.
Kasama P.
present
absent
Distribution of the goldenmussel around the Kasama pond.
+Countermeasure: Monitoring + Removal of mussels by draining reservoir
26
1:
2: ( )
3:
(2012) ,
V11007
wikipedia
( 2012)
( 2012)
⇒ /
(2012) (2017)
(2017)(2011) Vol 5
/
(2017) (2011)
[ ]
( 1997)
⇒ ( 1998)
[ ]
[ ]
( )
⇒( )
( )
.
Perepelizin and Boltovskoy (2011)
40 /
Montalto 2015
10+ ⇒
/ ( )
/ ( )
(2017)
2:
(Darrigran 2009)
( 2012)
•⇒
( )(Connelly et al. 2007)
⇒
•
present
absent
direction of water flow
( )man-made canals
Golden mussel expands via water utility systems( 2008, Ito 2015 ) 42
(2017)
(2017)