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Title: Effects of continuous chlorination on spat of the American oyster (Crassostrea virginica)

Abstract

Newly settled spat of the American oyster (Crassostrea virginica) exhibited reduced survival and growth when exposed to chronic chlorination (as Na-OCI). Spat exposed to nominal concentrations of 0.250 and 0.500 mg per 1 chlorine-produced oxidant (CPO) had only 20% survival after 12 weeks, compared to 64% survival in controls. Spat growth was retarded by nominal concentrations as low as 0.125 mg per 1 CPO. Shell height of control oysters increased 10% after 12 weeks, while spat exposed to 0.125 mg per 1 CPO grew 39% and spate exposed to 0.250 mg per 1 CPO had no net growth. Surviving spat exposed to 0.500 mg per 1 CPO showed an apparent growth increase in 160%, due mainly to heavy mortality among smaller-sized spat. The numbers of spat (whether surviving or not) that showed any growth over the 12-week exposure period decreased with increasing chlorine concentration. Larger spat were found to be more resistant than smaller spat to increased chlorination. The mechanism of growth inhibition in spat (mantle retraction and cessation of feeding) appeared to be similar to that found in adult oysters exposed to chlorine.

Authors:
Publication Date:
Research Org.:
Gulf Breeze Environmental Research Lab., Johns Island, SC
OSTI Identifier:
5841437
Resource Type:
Journal Article
Journal Name:
Estuaries; (United States)
Additional Journal Information:
Journal Volume: 4:4
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; CHLORINE; BIOLOGICAL EFFECTS; GROWTH; INHIBITION; DOSE-RESPONSE RELATIONSHIPS; EXPERIMENTAL DATA; MORTALITY; OYSTERS; SURVIVAL CURVES; ANIMALS; AQUATIC ORGANISMS; DATA; ELEMENTS; HALOGENS; INFORMATION; INVERTEBRATES; MOLLUSCS; NONMETALS; NUMERICAL DATA; 560302* - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)

Citation Formats

Sheridan, P.F. Effects of continuous chlorination on spat of the American oyster (Crassostrea virginica). United States: N. p., 1981. Web. doi:10.2307/1352164.
Sheridan, P.F. Effects of continuous chlorination on spat of the American oyster (Crassostrea virginica). United States. doi:10.2307/1352164.
Sheridan, P.F. Tue . "Effects of continuous chlorination on spat of the American oyster (Crassostrea virginica)". United States. doi:10.2307/1352164.
@article{osti_5841437,
title = {Effects of continuous chlorination on spat of the American oyster (Crassostrea virginica)},
author = {Sheridan, P.F.},
abstractNote = {Newly settled spat of the American oyster (Crassostrea virginica) exhibited reduced survival and growth when exposed to chronic chlorination (as Na-OCI). Spat exposed to nominal concentrations of 0.250 and 0.500 mg per 1 chlorine-produced oxidant (CPO) had only 20% survival after 12 weeks, compared to 64% survival in controls. Spat growth was retarded by nominal concentrations as low as 0.125 mg per 1 CPO. Shell height of control oysters increased 10% after 12 weeks, while spat exposed to 0.125 mg per 1 CPO grew 39% and spate exposed to 0.250 mg per 1 CPO had no net growth. Surviving spat exposed to 0.500 mg per 1 CPO showed an apparent growth increase in 160%, due mainly to heavy mortality among smaller-sized spat. The numbers of spat (whether surviving or not) that showed any growth over the 12-week exposure period decreased with increasing chlorine concentration. Larger spat were found to be more resistant than smaller spat to increased chlorination. The mechanism of growth inhibition in spat (mantle retraction and cessation of feeding) appeared to be similar to that found in adult oysters exposed to chlorine.},
doi = {10.2307/1352164},
journal = {Estuaries; (United States)},
number = ,
volume = 4:4,
place = {United States},
year = {1981},
month = {12}
}