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Accumulation and loss of 2' ,5-dichloro-4'-nitrosalicylanilide (Bayer 73) by fish: laboratory studies

Investigations in Fish Control 90

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Abstract

Residues of the 2-aminoethanol salt of 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73), as determined by gas-liquid chromatography, were rapidly accumulated by fish exposed to the lampricide -in blood plasma, gallbladder bile, and muscle tissue of coho salmon (Oncorhynchus kisutch) and rainbow trout (Salmo gairdneri), and in bile and muscle of channel catfish (Ictalurus punctatus) and largemouth bass (Micropterus salmoides). Muscle residue levels increased to near the treatment concentration during exposure. After 10 days of withdrawal, residues in plasma, bile, and muscle of rainbow trout and coho salmon decreased to less than 1% of their respective peak concentrations. In all four species, residues in muscle dropped below the limit of detection (0.01 ",gig) within 3 to 14 days. After an initial increase during early withdrawal, bile residues in all species declined steadily but had not dropped below initial levels in channel catfish in 14 days, or below detectable levels (0.01 ",g/mL) in coho salmon after 28 days of withdrawal.

Additional Publication Details

Publication type:
Report
Publication Subtype:
Federal Government Series
Title:
Accumulation and loss of 2' ,5-dichloro-4'-nitrosalicylanilide (Bayer 73) by fish: laboratory studies
Series title:
Investigations in Fish Control
Series number:
90
Year Published:
1982
Language:
English
Publisher:
U.S. Fish and Wildlife Service
Publisher location:
La Crosse, WI
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
5
First page:
0
Last page:
5
Number of Pages:
5