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底質毒性試験生物種としてのニホンドロソコエビ (Grandidierella japonica)
1. 2017.12.04 MoTY Joint Meeting
底質毒性試験種としての
ニホンドロソコエビの特性
Life history characteristics of Grandidierella japonica as
a test species of sediment risk assessments
2017.12.04 (月)
MoTY Joint Meeting
20 min + 10 min
8. 2017.12.04 MoTY Joint Meeting
文献ごとに温度が異なる
8
Temperature (°C)
96-hLC50(μg/L)
1010010000
10 15 20 25
Cd
Temperature (°C)
96-hLC50(μg/L)
1010010000
10 15 20 25
Zn
Temperature (°C)
96-hLC50(μg/L)
1010010000
10 15 20 25
Cu
Temperature (°C)
96-hLC50(μg/L)
1010010000
10 15 20 25
Un-ionized ammonia
Temperature (°C)
96-hLC50(μg/L)
1010010000
10 15 20 25
Fluoranthene
Temperature (°C)
96-hLC50(μg/L)
110100100010000
10 15 20 25
Chemical
Cd
Zn
Cu
Fluoranthene
Un-ionized ammonia
Species
G.japonica
A.abdita
C.volutator
G.aequicauda
L.plumulosus
M.plumulosa
G.lignorum
化学物質に対する感受性
Fig. 96-h LC50 values as a function of test temperature
温度・生物種・化学物質を説明変数とする
線形回帰式を求め
係数β2(Fig.2切片)によって生物種ごとの感受性を比較
𝑙𝑜𝑔10 96ℎ 𝐿𝐶50) =
𝛽0 + 𝛽1 ∙ 𝑇𝑒𝑚𝑝 + 𝜷 𝟐,𝒊 ∙ 𝑆𝑝𝑒𝑐𝑖𝑒𝑠𝑖 + 𝛽3,𝑗 + 𝛽4,𝑗 ∙ 𝑇𝑒𝑚𝑝) ∙ 𝐶ℎ𝑒𝑚𝑖𝑐𝑎𝑙𝑗
* Species, Chemicalは0/1で表されるカテゴリ変数
ニホンドロソコエビの感受性は
A. abditaとG. aequicauda
より低く
C. volutatorより高い
他3種とは同程度
感受性 低
Coefficientβ2
G.japonica
A.abdita
C.volutator
G.aequicauda
L.plumulosus
M.plumulosa
G.lignorum
-0.50.00.51.0
Error bars: SE
a a, b a, b
a, b
b
c
c
3. 結果 I
11. 2017.12.04 MoTY Joint Meeting
他種の端脚類と比べてニホンドロソコエビの
世代期間は短く 産仔数は多い
11
Native area
Maximum life
span
寿命
Ages of the first
brood
初回産仔日齢
Initial brood
size
初回産仔数
Mean brood size
1回あたり産仔数
Test
condition
Source
ニホンドロソコエビ
Grandidierella japonica
Japan, China, Korea 86 days 16-21 days 17 (11-22) 29 (8-52)
25°C,
30‰
This study
Ampelisca abdita
Atlantic Coast of North
America > 60 days 31-36 days 10-20 (NA) NA 25°C, 30‰
Redmond et al.,
1994
Corophium volutator Europe > 112 days < 58 days NA 36 23°C, 30‰
Peters and Ahlf,
2005
Gammarus aequicauda Europe 145 days > 44 days NA 19 (4-53) 18°C, 36‰ Prato et al., 2006
Hyale barbicornis Japan 171 days 49 days NA 11 24°C, NA
Hiwatari and
Kajihara, 1988
Leptocheirus plumulosus
Atlantic Coast of North
America > 100 days 14-21 days 7 (1-13) 10 (1-32) 25°C, 20‰ DeWitt et al., 1992
Melita plumulosa Australia 12 months 7 weeks 1 5 22°C, 35‰ Hyne et al., 2005
Grandidierella lignorum South Africa > 60 days 21-28 days 5 (3-7) NA (3-45) 22°C, 35‰ Masikane, 2013
他端脚類との生活史の比較
3. 結果 II
飼育や繁殖阻害の試験が容易
(外来種としての成功にも関係?)
19. 2017.12.04 MoTY Joint Meeting 19
• Aikins S, Kikuchi E, 2001, Studies on habitat selection by amphipods using artificial substrates within an estuarine environment. Hydrobiologia
457:77-86.
• Aikins S, Kikuchi E, 2002, Grazing pressure by amphipods on microalgae in Gamo Lagoon, Japan. Mar Ecol Prog Ser 245:171-179.
• Casado-Martinez MC, Burga-Pérez KF, Bebon R, Férard JF, Vermeirssen EL, Werner I, 2016, The sediment-contact test using the ostracod
Heterocypris incongruens: Effect of fine sediments and determination of toxicity thresholds. Chemosphere 151:220-224.
• Hansen PD, Blasco J, DelValls TA, Poulsen V, Van den Heuvel-Greve M, 2007, Biological analysis (bioassays, biomarkers, biosensors),
Sustainable Management of Sediment Resources, Ed: Barcelo D and Petrovic M, 1:131-161. Elsevier.
• Pan S, Kadokami K, Li X, Duong HT, Horiguchi T, 2014, Target and screening analysis of 940 micro-pollutants in sediments in Tokyo Bay, Japan.
Chemosphere 99:109-116.
• USEPA, 1994, Methods for assessing the toxicity of sediment-associated contaminants with estuarine and marine amphipods, Washington D.C.,
EPA600/R-94/025.
• USEPA, 2007, Sediment toxicity identification evaluation (TIE) phase I, II, III guidance document, Washington DC, EPA/600/R-07/080.
• West JM, Williams GD, Madon SP, Zedler JB, 2003, Integrating spatial and temporal variability into the analysis of fish food web linkages in Tijuana
Estuary. Environ Biol Fishes 67:297-309.
などなど
引用文献
20. 2017.12.04 MoTY Joint Meeting 20
化学物質に対する感受性
塩分とLC50との関係は
温度ほど明瞭ではなかった
塩分と温度の負の相関 (r =-0.48)
⇒ 塩分は説明変数に加えなかった
(p.8)
3. 結果 I
Salinity (‰)
96-hLC50(μg/L)
110100100010000
5 10 15 20 25 30 35
Chemical
Cd
Zn
Cu
Fluoranthene
Un-ionized ammonia
Species
G.japonica
A.abdita
C.volutator
G.aequicauda
L.plumulosus
M.plumulosa
G.lignorum