Acute and Postexposure Effects of Ammonia Toxicity on Juvenile Barramundi ( Lates calcarifer [Bloch])
Okelsrud, Asle, and Pearson, Richard G. (2007) Acute and Postexposure Effects of Ammonia Toxicity on Juvenile Barramundi ( Lates calcarifer [Bloch]). Archives of Environmental Contamination and Toxicology, 53 (4). pp. 624-631.
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Lethal and sublethal effects of ammonia toxicity to juvenile barramundi (Lates calcarifer) were investigated under laboratory conditions following the OECD guidelines for testing of chemicals. Acute toxicity was tested in a static nonrenewal system at pH 9.0 and temperature around 29°C. The 24-, 48-, and 96-h LC50 values for barramundi were 3.89, 3.67, and 3.31 mg total ammonia N L−1 and 1.59, 1.47, and 1.3 mg nonionized ammonia N L−1, respectively. Estimated lethal concentrations indicated a relatively high sensitivity to acute ammonia toxicity for barramundi and equaled the 25th percentile most sensitive North American fish species with regard to the species mean acute value (USEPA 1999). A 3-week postexposure experiment on surviving individuals from the acute toxicity test, in clean water, indicated that exposure to acute concentrations up to 1.16 mg nonionized ammonia N L−1 did not have any significant effects on growth.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||ammonia; toxicity testing; short term exposure; local water quality guidelines|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 100%|
|SEO Codes:||96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%|
|Deposited On:||24 Sep 2009 11:04|
|Last Modified:||18 Oct 2013 00:29|
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