AVOIDANCE REACTIONS OF SALMONID FISH;TO REPRESENTATIVE POLLUTANTS
AVOtD^NCE Of pol!~ted waters by fish is often named as one of four or five probable sublethal effects of pollution. However, there have been relatively few investigations to demonstrate whether avoidance reactions are in fact of great importance. The purpose of the present research was (1) to determ...
| Main Authors: | , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.2617 http://www.calwater.ca.gov/Admin_Record/D-042545.pdf |
| Summary: | AVOtD^NCE Of pol!~ted waters by fish is often named as one of four or five probable sublethal effects of pollution. However, there have been relatively few investigations to demonstrate whether avoidance reactions are in fact of great importance. The purpose of the present research was (1) to determine whether there is a general pattern of sponta.n~ous avoidance reactions by fish, (2) to attempt extrapolation of the laboratory findings to field situations, to predict behaviour of fish if their natural ~_k ~ ¯ habitat were affected by these pollutants. ~UN 0 9 ’~. t.!3EHC;!’.MATERIALS AND METHODS Rainbow trout (Salmo gairdnerii Richardson) and Atlantic salmon (Salmo salar L.) were obtained from hatcheries of the Canada Department of Fish.cries. Size-range during tests ~vas 7.7 to 14.8 cm. Acclimation and feeding followed standard practice (Sprague, in press). The laboratory water was very soft, 13 to 16 mg/l. hardness as CaCO3: other qualities have been described (Sprague, 1964). k, Vater passed through an activated carbon filter and gave no chlorine reaction ¯ Test temperatures were within 0¯2 = of 17~C, acclima- ~’- ~" |
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