Freshwater Invertebrates' Response To Gradients Of Salinity And Turbidity: Using Preference As A Rapid Sub-Lethal Test

Kefford, B; Salter, J; Clay, C; Dunlop, JE; Nugegoda, D

Freshwater Invertebrates' Response To Gradients Of Salinity And Turbidity: Using Preference As A Rapid Sub-Lethal Test

Kefford, B Salter, J Clay, C Dunlop, JE Nugegoda, D

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Publisher:: Australasian Society for Ecotoxicology
Publication Type:: Journal Article
Citation:: Australasian Journal of Ecotoxicology, 2007, 13 (3), pp. 131 - 142
Issue Date:: 2007-01

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Field	Value	Language
dc.contributor.author	Kefford, B	en_US
dc.contributor.author	Salter, J	en_US
dc.contributor.author	Clay, C	en_US
dc.contributor.author	Dunlop, JE	en_US
dc.contributor.author	Nugegoda, D	en_US
dc.date.issued	2007-01	en_US
dc.identifier.citation	Australasian Journal of Ecotoxicology, 2007, 13 (3), pp. 131 - 142	en_US
dc.identifier.issn	1323-3475	en_US
dc.identifier.uri	http://hdl.handle.net/10453/13816
dc.description.abstract	This study investigates the use of a sub-lethal rapid toxicity testing method that allows animals to move within a concentration gradient in an attempt to measure a sub-lethal response of preference to inhabit a particular contaminant concentration. We describe a testing apparatus and trial its use in assessing the preferences of selected riverine invertebrates (collected from Victoria, Australia) for two common river contaminants, salinity and turbidity [simulated by suspended fine sediment (standardised clay, kaolin)]. For salinity preference experiments, the testing apparatus was found to be unsuitable for use with small macroinvertebrates due to the need to use vigorous aeration to mix the test solution in order to prevent horizontal stratification. However, aerated salinity preference tests were successful using the freshwater shrimp Paratya australiensis (Decapoda: Atyidae), and indicated their preference for salinity <17.6-18.8 mS/cm. This observed preference for low salinity was unchanged by acclimation to salinity of 0.1, 10 or 20 mS/cm prior to testing. A dispersion of suspended particulates was used for turbidity preference experiments, and so vigorous aeration was unnecessary. When used in this way the test apparatus was found to be suitable for testing all stream macroinvertebrates tested (nine species) and one microinvertebrate. One test species, Micronecta annae (Hemiptera: Corixidae), was observed to prefer relatively high turbidity (>200 NTU) but only when collected from one of two locations.	en_US
dc.publisher	Australasian Society for Ecotoxicology	en_US
dc.relation.ispartof	Australasian Journal of Ecotoxicology	en_US
dc.title	Freshwater Invertebrates' Response To Gradients Of Salinity And Turbidity: Using Preference As A Rapid Sub-Lethal Test	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	13	en_US
utslib.for	0602 Ecology	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	06 Biological Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of the Environment
utslib.copyright.status	closed_access
pubs.consider-herdc	false	en_US
pubs.issue	3	en_US
pubs.volume	13	en_US

Abstract:

This study investigates the use of a sub-lethal rapid toxicity testing method that allows animals to move within a concentration gradient in an attempt to measure a sub-lethal response of preference to inhabit a particular contaminant concentration. We describe a testing apparatus and trial its use in assessing the preferences of selected riverine invertebrates (collected from Victoria, Australia) for two common river contaminants, salinity and turbidity [simulated by suspended fine sediment (standardised clay, kaolin)]. For salinity preference experiments, the testing apparatus was found to be unsuitable for use with small macroinvertebrates due to the need to use vigorous aeration to mix the test solution in order to prevent horizontal stratification. However, aerated salinity preference tests were successful using the freshwater shrimp Paratya australiensis (Decapoda: Atyidae), and indicated their preference for salinity <17.6-18.8 mS/cm. This observed preference for low salinity was unchanged by acclimation to salinity of 0.1, 10 or 20 mS/cm prior to testing. A dispersion of suspended particulates was used for turbidity preference experiments, and so vigorous aeration was unnecessary. When used in this way the test apparatus was found to be suitable for testing all stream macroinvertebrates tested (nine species) and one microinvertebrate. One test species, Micronecta annae (Hemiptera: Corixidae), was observed to prefer relatively high turbidity (>200 NTU) but only when collected from one of two locations.

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http://hdl.handle.net/10453/13816