By J. R. Erichsen Jones
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Extra resources for Fish and River Pollution
J. exp. BioL, 16 (1939) 313-33 16 Allan, I. R. , Alabaster, J. S. and Herbert, D. W. M. Recent studies on toxicity and stream pollution. Water Sanit. , 5 (1954) 109-12 17 Beak, T. W. Toleration offish to toxic pollution. J. Fish. Res. Bd. , 15 (1958) 559-72 52 5 LEAD, ZINC AND COPPER: THE 'COAGULATION FILM ANOXIA' THEORY THE pollution of rivers by lead, zinc and other heavy metals has attracted attention for a considerable time. Lead is present in effluents associated with the manufacture of accumulators, in lead paint wastes and wastes from the manufacture of pewter ware.
I n testing the effect of an effluent or any solution of some particular substance toxic to fish four criteria have been employed to express the time-effect relationship 1 : (1) T h e immersion time apparently necessary to initiate the toxic process. This is the time that passes before the first indications of poisoning are evident. Different toxic substances may behave very differently in this respect; with hydrogen cyanide a change in breathing rate is almost immediate but with dilute solutions of ammonia no reaction may be apparent for some considerable time.
Physiol Zool, 31 (1958) 117-28 Thompson, D . H . Some observations on the oxygen requirements of fishes in the Illinois River. Bull. III. Lab. nat. , 15 (1925) 423-37 Cooper, G. P. a n d W a s h b u r n , G. N . Relation of dissolved oxygen to winter mortality of fish in Michigan lakes. Trans. Amer. Fish. Soc, 76 (1949) 23-33 Moyle, J . B. a n d Clothier, W . D . Effects of m a n a g e m e n t a n d winter oxygen levels on the fish population of a prairie lake. Trans. Amer. Fish. Soc, 88 (1958) 178-85 Moore, W .