Abstract
Original language | Undefined |
---|---|
Pages (from-to) | 755-765 |
Number of pages | 11 |
Journal | Marine and Freshwater Research |
Volume | 54 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2003 |
Cite this
}
Relative salinity tolerance of macroinvertebrates from the Barwon River, Victoria, Australia. / Kefford, B.J.; Papas, P.J.; Nugegoda, D.
In: Marine and Freshwater Research, Vol. 54, No. 6, 2003, p. 755-765.Research output: Contribution to journal › Article
TY - JOUR
T1 - Relative salinity tolerance of macroinvertebrates from the Barwon River, Victoria, Australia
AU - Kefford, B.J.
AU - Papas, P.J.
AU - Nugegoda, D.
N1 - cited By 92
PY - 2003
Y1 - 2003
N2 - Salinity levels are rising in many freshwater environments, yet there are few direct measurements of salinity tolerance of organisms likely to be salt sensitive. The relative salinity tolerance to artificial seawater of macroinvertebrates from the Barwon River in Victoria, Australia, was assessed by measuring the 72-h lethal concentrations required to kill 50% of individuals (LC50). LC50 values ranged from an electrical conductivity of 5.5 to 76 mS cm-1 (mean 31 mS cm-1, n = 57) and followed a log-normal distribution. The most salt-sensitive groups tested were Baetidae (LC50 value range: 5.5-6.2 mS cm-1), Chironomidae (10 mS cm-1) and several soft-bodied non-arthropods (Oligochaeta, Gastropoda, Nematomorpha, Tricladida and Hirudinea; 9-14 mS cm-1). Other groups, from least to most tolerant, were non-baetid Ephmeroptera (>12.6-15 mS cm-1), Plecoptera (>12.6->20 mS cm-1), Trichoptera (9->26 mS cm-1), Corixidae (18-26 mS cm-1), non-corixid Hemiptera (33-44 mS cm-1), Coleoptera (19-54 mS cm-1), Hydracarina (39 mS cm-1) and Odonata (30-55 mS cm-1), and macrocrustaceans (Decapoda, Isopoda and Amphipoda; 38-76 mS cm-1).
AB - Salinity levels are rising in many freshwater environments, yet there are few direct measurements of salinity tolerance of organisms likely to be salt sensitive. The relative salinity tolerance to artificial seawater of macroinvertebrates from the Barwon River in Victoria, Australia, was assessed by measuring the 72-h lethal concentrations required to kill 50% of individuals (LC50). LC50 values ranged from an electrical conductivity of 5.5 to 76 mS cm-1 (mean 31 mS cm-1, n = 57) and followed a log-normal distribution. The most salt-sensitive groups tested were Baetidae (LC50 value range: 5.5-6.2 mS cm-1), Chironomidae (10 mS cm-1) and several soft-bodied non-arthropods (Oligochaeta, Gastropoda, Nematomorpha, Tricladida and Hirudinea; 9-14 mS cm-1). Other groups, from least to most tolerant, were non-baetid Ephmeroptera (>12.6-15 mS cm-1), Plecoptera (>12.6->20 mS cm-1), Trichoptera (9->26 mS cm-1), Corixidae (18-26 mS cm-1), non-corixid Hemiptera (33-44 mS cm-1), Coleoptera (19-54 mS cm-1), Hydracarina (39 mS cm-1) and Odonata (30-55 mS cm-1), and macrocrustaceans (Decapoda, Isopoda and Amphipoda; 38-76 mS cm-1).
U2 - 10.1071/MF02081
DO - 10.1071/MF02081
M3 - Article
VL - 54
SP - 755
EP - 765
JO - Marine Freshwater Research
JF - Marine Freshwater Research
SN - 0067-1940
IS - 6
ER -