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)