The impact of heavy metals on the activity of carbonic anhydrase from rainbow trout (Oncorhynchus mykiss) kidney

Toxicity of some heavy metals (HM), heavy metal model mixture (HMMM), orimulsion, crudeoil and water of some biotopes of Lake Druksiai was evaluated by use of the fish in all stages ofdevelopment (embryos, larvae, adult fish). The rainbow trout was very sensitive test-organism tothe effect of different kind pollutants and the most sensitive to the impact of pollutants were fishat early stages of development i.e. larvae and embryos. The integrated biological parameters offish at all stages of development (survival, growth rate, and relative mass increase) were the mostsensitive ones. In accordance with the sensitivity to the impact of heavy metals, animals in theearliest stages of their development were more sensitive than plants, but the plants in some caseswere more sensitive to heavy metals than adult fish. Therefore, plants as well as animals -rainbow trout (Oncorhynchus mykiss) of different life stages, as test-organisms, arerecommended for the inclusion of the complex biotests for the assessment of the impact of heavymetals. The complex of the most sensitive parameters investigated of rainbow trout can besuccessfully used for the water toxicity assessment containing different kind pollutants. The dataobtained let predict the impact of pollution not only to the physiological status of aquaticorganisms but as well as to their survival in natural water bodies.

Download Full-text

Behavioral Responses of Rainbow Trout Oncorhynchus mykiss to Sublethal Toxicity of a Model Mixture of Heavy Metals

Bulletin of Environmental Contamination and Toxicology ◽

10.1007/s00128-005-0658-3 ◽

2005 ◽

Vol 74 (5) ◽

pp. 845-852 ◽

Cited By ~ 7

Author(s):

G. Svecevičius

Keyword(s):

Heavy Metals ◽

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Behavioral Responses ◽

Model Mixture ◽

Sublethal Toxicity ◽

Rainbow Trout Oncorhynchus Mykiss

Download Full-text

The Impact of Municipal Wastewater and Heavy Metal Mixture on Larvae of Rainbow Trout (Oncorhynchus mykiss)

Acta Zoologica Lituanica ◽

10.1080/13921657.2003.10512308 ◽

2003 ◽

Vol 13 (4) ◽

pp. 372-378 ◽

Cited By ~ 3

Author(s):

Janina Sˇyvokienė ◽

Pranutė Stasięnaitė ◽

Liongina Mickėnienė

Keyword(s):

Heavy Metal ◽

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Municipal Wastewater ◽

Metal Mixture ◽

Rainbow Trout Oncorhynchus Mykiss ◽

The Impact

Download Full-text

Assessing the effects of positive buoyancy on rainbow trout (Oncorhynchus mykiss) held in gas supersaturated water

Canadian Journal of Zoology ◽

10.1139/z90-139 ◽

1990 ◽

Vol 68 (5) ◽

pp. 969-973 ◽

Cited By ~ 13

Author(s):

J. M. Shrimpton ◽

D. J. Randall ◽

L. E. Fidler

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Ambient Pressure ◽

Large Change ◽

Bladder Volume ◽

Bladder Pressure ◽

Small Fish ◽

Swim Bladder ◽

Rainbow Trout Oncorhynchus Mykiss ◽

The Impact

We examined the effects of swim bladder overinflation associated with dissolved gas supersaturation on rainbow trout (Oncorhynchus mykiss). The change in swim bladder volume with increased swim bladder pressure was measured in fish subjected to a decrease in ambient pressure. An expansion of swim bladder volume occurs that is related to the excess swim bladder pressure. The volume change results in a decrease in density and positive buoyancy in the fish. Small fish are adversely affected when exposed to gas supersaturated water because of the high swim bladder pressure required to force gas out the pneumatic duct. Changes in behaviour and depth distribution of fish held in gas supersaturated water were measured in a 2 m deep observation column. A large change in density caused small fish to increase depth and compensate for the swim bladder expansion. Although swim bladder inflation occurs for all sizes of trout held in gas supersaturated water, the impact is greatest for small fish and they must compensate by seeking depth. However, adequate depth to compensate for positive buoyancy may not always exist. In such a case, fish must swim continuously in a head down position to overcome excess buoyancy. The power necessary for a fish to swim with an overinflated swim bladder is greatest for small fish that show the largest change in density.

Download Full-text