Ehime University Institutional Repository

呂, 寅満

Japanese

鞍間期日本における自動車の普及と旅客運送業の変化

三宅, 洋

中野, 裕

土肥, 唱吾

峰松, 勇二

77
工学ジャーナル　第 8 巻
2009 年 3 月
Annual Journal of Eng.,
Ehime Univ., VIII, Mar., 2009
原稿受理　平成 20 年 10 月 31 日
 
 
Hyporheic invertebrates and fish 
in an intermittent reach of Shigenobu River 
 
 
 *  *  *  * 
 
Yo Miyake* Hiroshi Nakano* Shogo Dohi* Yuji Minematsu* 
 
  We sampled hyporheic invertebrates and fish in an intermittent reach of Shigenobu River by digging out 
dried-up streambed using hydraulic excavator. Three study sites were established in midstream segment of the 
river (ca. 5.9 km from mouth): HU (hyporheic upstream, 1 day from dry-up), HD (hyporheic downstream, 6 days 
from dry-up) and PP (perennial pool). A total of 1,868 individuals and 24 taxa were found in the hyporheic 
invertebrate samples. The densities of invertebrate taxa were in general highest at PP, followed by HU and HD. 
However, the densities of coleopteran taxa were higher at hyporheic study sites than at PP. We captured one 
individual of endangered Japanese spinous loach, Cobitis shikokuensis, at HU. This is the first record of the 
species captured from the hyporheic zone. We concluded that the hyporheic zone possibly serve as refugia for 
stream animals during droughts in intermittent streams. 
 
Key words: hyporheic zone, intermittent stream, hydraulic excavator, stream invertebrates, stream fish, 
Japanese spinous loach 
 
 
1  
hyporheic zone
1 hyporheos
2
3
4
5
6  
7
8
9
10
*  
* Graduate School of Science and Engineering, Ehime University 
78
11
12
11 12
 
2
2
13
well
3
freeze-core technique 14
13
14
 
2  
 
2007 9 13
1,233 
36 km 445 km2 Fig. 1
60  
1,300 mm
18-22 km 10-16 km 5-8 km 3
1970
2 m3 s-1
18 2 m3 s-1 1.20 m
 
79
 
5.9 km 2007 9 13 Fig. 
1 PP Perennial pool 1
2 PP 3 m 40 m
SK70SR-2 KOBELCO HU
Hyporheic Upstream HD Hyporheic Downstream Fig. 1
HU 6.0 m2 HD 7.0 m2 PP 270.0 m2
HU 16 cm HD 46 cm Table 1
HU 17 cm HD 16 cm
HU 9 12 HD 6 9 7
HU 6.93 mg l-1 HD 4.14 mg l-1 PP 7.40 
mg l-1 pH
Table 1 cobble
64-256 mm pebble 16-64 mm gravel 2-16 mm
sand < 2 mm [16],[17]  
HD
HU
PP
Fig. 1. Location of study sites. HU: Hyporheic upstream, HD: Hyporheic downstream, PP: Perennial pool. 
0.0451.4857.67.400.24618.626.936.0 7.5PPPerennial pool
0.0401.6357.64.140.24615.7-4625.72.4 3.2HDHyporheic downstream
0.0801.4807.66.930.24017.3 -1626.92.3 2.6HUHyporheic upstream
PO4-P
(mg l-1)
NO3-N
(mg l-1)pH
DO
(mg l-1)
EC
(mS cm-1)
Mean
depth (cm)
Groundwater
level (cm)
Water
temp. ( C)Area (m)Abbrev.Site
Table 1. Description of study sites. 
80
D 25  25 cm 40 cm 0.5 mm
HU HD 2
1 30 PP
36 m
2 25 cm × 25 cm
D
6 5%
HU
HD PP 20  2 m
 
N m-2
N m-2
 
 
3  
 
2,026 25
HU 1,832 23 HD
36 7
Table 2 PP 158
15
PP 1,264.0 N m-2 HU
305.3 N m-2 HD 4.7 N m-2
HU HD
3.0%
Asellus hilgendorfii 64.1%
Helochares spp.
8.9% Podocopida 5.8%
Hydroporinae 4.8%
Caenis spp. 4.5%
Chironominae 3.1%
6 HU HD
91% PP
62.1%32.0 4.8 Erpobdella lineata
Erpobdellidae
PHARYNGOBDELLIDA
HIRUDINEA
8.0 0.2 Oligochaeta
OLIGOCHAETA
472.0 1.6 198.0 Asellus hilgendorfii
Asellidae
ISOPODA   
64.0 0.1 17.9 Podocopida
PODOCOPIDA
8.0 2.6 Cyclopoida
CYCLOPOIDA
24.0 2.8 Crangonyx floridanus
AMPHIPODA
CRUSTACEA
8.0 0.8 Acarina
ACARINA
ARACHNOIDA
24.0 1.2 8.4 Chironominae
8.0 2.2 Tanypodinae
48.0 0.7 4.3 Orthocladiinae
Chironomidae
0.2 Tipula spp.   
Tipulidae
DIPTERA
0.8 5.4 Elminae
Elmidae
0.2 Psephenoides spp.   
Psephenidae
0.5 Gyrinus spp.   
Gyrinidae
0.1 27.6 Helochares spp.   
Hydrophilidae
0.3 Colymbetinae
8.0 14.9 Hydroporinae
Dytiscidae
COLEOPTERA
0.2 Hydroptila spp.   
Hydroptilidae
TRICHOPTERA
0.2 Calopteryx cornelia
Calopterygidae
0.2 Nihonogomphus viridis
Gomphidae
ODONATA
16.0 Ecdyonurus kibunensis
Heptageniidae
16.0 Baetis sp. I   I
Baetidae
0.3 Torleya japonica   
Ephemerellidae
16.0 13.9 Caenis spp.   
Caenidae
0.3 Ephemera spp.   
Ephemeridae
8.0 0.7 Potamanthus formosus
Potamanthidae
EPHEMEROPTERA
INSECTA
PPHDHU
Density (N m-2)
Taxon
Table 2. Invertebrate density at each study site. 
81
8.4%
Orthocladiinae 6.3%
Erpobdella lineata 4.2% 3.2%
Crangonyx floridanus
3.2% 6
PP 87% Table 
2  
PP HU HD
Table 2
Elminae
HU HD
PP
PP HU
Table 2  
87 11
PP 86
11
HU Cobitis 
shikokuensis 1 Table 3
D
PP 2.15 N 
m-2 HU 0.17 N m-2 HD 0 N m-2
PP
10% Zacco platypus
32.6% Carassius sp.
14.0% Tridentiger brevispinis 14.0%
Cobitis biwae 11.6%
4 PP
72% Table 3  
 
4
 
[9],[11]
HD
12Tridentiger brevispinis
5 Rhinogobius sp. CB   
Gobiidae
PERCIFORMES
1 Silurus asotus
Siluridae
SILURIFORMES
5 1 Cobitis shikokuensis
10 Cobitis biwae
Cobitidae
12 Carassius sp.   
7 Cyprinus carpio
2 Pseudogobio esocinus
3 Phoxinus oxycephalus
28 Zacco platypus
Cyprinidae
CYPRINIFORMES
1Anguilla japonica
Anguillidae
ANGUILLIFORMES
PPHDHU
Number of individuals
Species
Table 3. Fish captured at each study site. 
Fig. 2. Photograph of Japanese spinous loach, 
Cobitis shikokuensis, captured from the hyporheic 
zone. 
1 cm
82
[12]
 
[12]
 
HU 1
[18]
1
1B EN
[18]
 
 
 
5
 
83
 
 
6  
 
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