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Title: Chronic toxicity of waterborne thiocyanate to the fathead minnow (Pimephales promelas): A partial life-cycle study

Abstract

Juvenile fathead minnows (Pimephales promelas) were exposed to thiocyanate (SCN[sup [minus]]) concentrations of 0, 1.1, 7.3, 16.6, or 32.6 mg/L for 124 d while monitoring growth, physiological, reproductive, and histological parameters. The NOEC for decreased egg production, increased time to first spawn, and development of overt goiter was 1.1 mg/L, whereas the LOEC for these parameters was 7.3 mg/L. Histological changes in thyroidal tissue were the most sensitive parameter observed, with an LOEC of 1.1 mg/L. Fish exposed to 16.6 or 32.6 mg SCN[sup [minus]]/L neither completed development of secondary sexual characteristics nor spawned. The LOEC for decreased growth and hematocrit was 32.6 mg/L. SCN[sup [minus]] accumulated in the plasma of fish exposed to 16.6 and 32.6 mg/L, with BCFs of 2.7 and 13.8, respectively. Development and mortality of embryos and larvae to 3 d post-hatch were also monitored in eggs spawned by adults exposed to 0 or 1.1 mg SCN[sup [minus]]/L and subsequently incubated and hatched at 0, 1.1, 7.3, 16.6, or 32.6 mg/L.Eggs spawned by adults exposed to 1.1 mg SCN[sup [minus]]/L exhibited increased percentage of eyeup and hatch, while decreasing time to hatch and mortality. There were no effects of SCN[sup [minus]] concentration during incubation on eggmore » viability. After the 124-d exposure, adults were transferred to SCN[sup [minus]]-free water for 30 d. Insufficient numbers of adults were available from groups exposed to 32.6 mg/L to be included in the recovery study. Eggs were spawned by all groups during the recovery period, regardless of the SCN[sup [minus]] preexposure level, although time to first spawn increased with preexposure concentration.« less

Authors:
;  [1]
  1. Univ. of Waterloo, Ontario (Canada). Dept. of Biology
Publication Date:
OSTI Identifier:
6910186
Resource Type:
Journal Article
Journal Name:
Environmental Toxicology and Chemistry; (United States)
Additional Journal Information:
Journal Volume: 13:9; Journal ID: ISSN 0730-7268
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 54 ENVIRONMENTAL SCIENCES; FATHEAD MINNOW; SENSITIVITY; THIOCYANATES; TOXICITY; WATER POLLUTION; ANIMALS; ANTITHYROID DRUGS; AQUATIC ORGANISMS; CARBONIC ACID DERIVATIVES; DRUGS; FISHES; HORMONE ANTAGONISTS; ORGANIC COMPOUNDS; ORGANIC SULFUR COMPOUNDS; POLLUTION; VERTEBRATES; 560300* - Chemicals Metabolism & Toxicology; 540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Lanno, R P, and Dixon, D G. Chronic toxicity of waterborne thiocyanate to the fathead minnow (Pimephales promelas): A partial life-cycle study. United States: N. p., 1994. Web. doi:10.1002/etc.5620130906.
Lanno, R P, & Dixon, D G. Chronic toxicity of waterborne thiocyanate to the fathead minnow (Pimephales promelas): A partial life-cycle study. United States. https://doi.org/10.1002/etc.5620130906
Lanno, R P, and Dixon, D G. 1994. "Chronic toxicity of waterborne thiocyanate to the fathead minnow (Pimephales promelas): A partial life-cycle study". United States. https://doi.org/10.1002/etc.5620130906.
@article{osti_6910186,
title = {Chronic toxicity of waterborne thiocyanate to the fathead minnow (Pimephales promelas): A partial life-cycle study},
author = {Lanno, R P and Dixon, D G},
abstractNote = {Juvenile fathead minnows (Pimephales promelas) were exposed to thiocyanate (SCN[sup [minus]]) concentrations of 0, 1.1, 7.3, 16.6, or 32.6 mg/L for 124 d while monitoring growth, physiological, reproductive, and histological parameters. The NOEC for decreased egg production, increased time to first spawn, and development of overt goiter was 1.1 mg/L, whereas the LOEC for these parameters was 7.3 mg/L. Histological changes in thyroidal tissue were the most sensitive parameter observed, with an LOEC of 1.1 mg/L. Fish exposed to 16.6 or 32.6 mg SCN[sup [minus]]/L neither completed development of secondary sexual characteristics nor spawned. The LOEC for decreased growth and hematocrit was 32.6 mg/L. SCN[sup [minus]] accumulated in the plasma of fish exposed to 16.6 and 32.6 mg/L, with BCFs of 2.7 and 13.8, respectively. Development and mortality of embryos and larvae to 3 d post-hatch were also monitored in eggs spawned by adults exposed to 0 or 1.1 mg SCN[sup [minus]]/L and subsequently incubated and hatched at 0, 1.1, 7.3, 16.6, or 32.6 mg/L.Eggs spawned by adults exposed to 1.1 mg SCN[sup [minus]]/L exhibited increased percentage of eyeup and hatch, while decreasing time to hatch and mortality. There were no effects of SCN[sup [minus]] concentration during incubation on egg viability. After the 124-d exposure, adults were transferred to SCN[sup [minus]]-free water for 30 d. Insufficient numbers of adults were available from groups exposed to 32.6 mg/L to be included in the recovery study. Eggs were spawned by all groups during the recovery period, regardless of the SCN[sup [minus]] preexposure level, although time to first spawn increased with preexposure concentration.},
doi = {10.1002/etc.5620130906},
url = {https://www.osti.gov/biblio/6910186}, journal = {Environmental Toxicology and Chemistry; (United States)},
issn = {0730-7268},
number = ,
volume = 13:9,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 1994},
month = {Thu Sep 01 00:00:00 EDT 1994}
}