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Shock‐induced triploidy and its effect on growth and gonad development of the European catfish, Silurus glanis L.
Author(s) -
Krasznai Z.,
Márían T.
Publication year - 1986
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1986.tb04968.x
Subject(s) - biology , catfish , hatching , gonad , development of the gonads , human fertilization , fishery , zoology , fish <actinopterygii> , anatomy
Triloidy was induced in European catfish, Silurus glanis L., by cold‐shocking eggs at 4°C for 30 and 40 min respectively, starting 5 min after fertilization. The hatching success of cold‐shocked eggs was 25–30%. Cold shocks longer than 1 h caused total mortality. The triploid character of the cold‐shocked European catfish was proved by karyological and red blood cell size analyses. The gonads of the triploid fish were significantly smaller than those of the diploids, while the growth rate values of the triploids were significantly higher than those of the diploids.