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Differential Resistance among Channel Catfish Strains and Intraspecific Hybrids to Environmental Nitrite
Author(s) -
Tomasso J. R.,
Carmichael Gary J.
Publication year - 1991
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1577/1548-8667(1991)003<0051:draccs>2.3.co;2
Subject(s) - ictalurus , catfish , biology , nitrite , intraspecific competition , zoology , aquaculture , hybrid , significant difference , fishery , fish <actinopterygii> , toxicology , ecology , nitrate , botany , medicine
Fifteen strains and intraspecific hybrids of channel catfish Ictalurus punctatus were exposed to 76–79 mg nitrite‐N/L. After 48 h of exposure, a significant difference (P = 0.0092) was observed in the number of dead fish among groups. The existence of nitrite‐resistant and nitrite‐susceptible strains of channel catfish provides another management criterion for aquaculturists in localities where nitrite toxicosis is a problem, and perhaps provides a basis for the development of a more nitrite‐resistant aquaculture stock.