Salmo species

Fig. 7. Toxicity of chlorine to aquatic organisms, (a) Time-dependent mortaUty (50%) of four example species in various levels of total residual chlorine in the laboratory, where for A, A.losa aestivalis and B, Salmogairdnerii r (correlation coefficient of the curve) = —0.96 and for C, P/euroneetesplatessa and D, Salmo trutta r = —0.98. (b) A summary of chlorine toxicity to freshwater species, indicating overall no-effect thresholds for acute and chronic exposures. Numbers indicate where more than one test yielded the same result. A different summary figure appHes to marine organisms because of differences in the...

Intensive or extensive culture of aquatic animals requires chemicals that control disease, enhance the growth of cultured species, reduce handling trauma to organisms, improve water quality, disinfect water, and control aquatic vegetation, predaceous insects, or other nuisance organisms. The aquacultural chemical need for various species have been described for rainbow trout, Oncorhjnchus mjkiss (1) Adantic and Pacific salmon, Salmo and Oncorhjnchus sp. (2) channel catfish, Ictaluruspunctatus (3) striped bass, Morone saxatilis (4) milkfish, Chanos chanos (5) moUusks (6) penaeid (Penaeus sp.) shrimp (7) and a variety of other marine species (8). 

The Ebro catchment has the highest richness of autochthonous limnetic species in the Iberian Peninsula [51]. Salaria (blennius) fluviatilis, is common at the main channel and tributaries, and Chondrostoma toxostoma only occurs at the tributaries. Leuciscus cephalus is a fish of narrow distribution, found only at the Ebro river basin and other small catchments of NE Spain. Salmonids are common at the headwaters one species is native Salmo trutta and two introduced others, Salmo gairdneri and Salvelinus fontinalis. Part of the autocthonous species are endemic, for example the cyprinids Barbus graellsii and Barbus haasi, the cobitid C. calderoni with scattered and scarce populations [52] and A. iberus. 

Linde, A.R., R Arribas, S. Sanchez-Galan, and E. Garcia-Vazquez. 1996. Eel (Anguilla anguilla) and brown trout (Salmo trutta) target species to assess the biological impact of trace metal pollution in freshwater ecosystems. Arch. Environ. Contam. Toxicol. 31 297-302. 

Several trends are evident from Table 9.6 (1) freshwater fishes are more sensitive to zinc than marine species (2) embryos and larvae are the most sensitive developmental stages (3) lethal and sublethal effects occur in the range 50 to 235 pg Zn/L for most species, and 4.9 to 9.8 pg Zn/L for brown trout (Salmo trutta) and (4) behavioral modifications, such as avoidance, occur at concentrations as low as 5.6 pg Zn/L. 

Oncorhynchus mykiss [16,22—25,29], Lepomis macrochirus [28,31,66, 67], and Cyprinus carpio [19,30,34,60] being the species most frequently studied others include Salmo salar [26,41], Proterorhinus marmoratus [65], Carassius auratus [12] and Oryzias latipes [15]. 

In addition to the 2 nm shift in the absorption maximum, the two cytochromes can be distinguished by the use of ethyl isocyanide interaction spectra (6, 7) and various inhibitors of the monooxygenase activity (Figure 2 and Table III). The relative magnitude of the ethyl isocyanide-cytochrome P-1+50 interaction spectral peaks at —1+30 and —1+55 nm is pH dependent (6j and if the absorbance differences are plotted as functions of pH, there is a cross-over point at a certain pH which is characteristic for a particular form of cytochrome P-1+50 pH 6.9 for cytochrome P-1+1+8 and pH 7-5-7.6 for PB induced or control cytochrome P-1+50 (6, 21). The cytochrome P-1+50 of apparently uninduced trout species (Salmo trutta lacustris) has been shown by us to have the pH cross-over point for ethyl isocyanide interaction spectrum at pH 7.8 (2l) and the absorption maximum of the reduced trout liver cytochrome P-1+50. 00 complex is 1+50 nm, nevertheless its catalytic and inhibitory properties (2l)(Table III) are similar to those of cytochrome P-1+1+8. 

Anderson, D.R. and Lusty, E.B. Acute toxicity and bioaccumulation of chloroform to four species of freshwater fish Salmo gairdneri, rainbow trout Lepomis machrochirus, bluegill Micropterus salmoides, largemouth bass Ictalurus punctatus, channel catfish, prepared by Pacific Northwest Laboratory PNL-3046, for U.S. Nuclear Regulatory Cotmnission,... 

In Ireland, compliance with toxicity limits for selected industries is ascertained by annual or biannual test on representative samples of effluent. The test species most commonly used is the rainbow trout (Salmo gairdneri). Control authorities normally require results from 96-hour tests. The toxicity values are expressed as the minimum acceptable proportion of effluent (as a percentage) in a test resulting in 50% fish mortality after 96 hours of exposure. The toxic units (TU) are defined as the maximum number of times an effluent may be diluted to produce the test criteria (TU = 100/96-hour LC50, with LC50 expressed as the percentage of effluent in the test) (Fig. 5). 

Olsen, K. H., Bjerselius, R., Petersson, E., etal. (2000). Lack of species-specific primer effects of odours from female Atlantic salmon [Salmo solar L.) and brown trout Salmo truttaL.). Oikos 88,213-220. 

The acute toxicity of AES to fish is similar across fish species and similar to the toxicity to Daphnia magna reported by Maki (70). LC50 values range from 1.5 for the brown trout (Salmo trutto) (88) to 3.0 mg/L for the goldfish... 

Protamine, a basic protein from the testes of fish of the salmon family, e.g. Salmo and Onchorhynchus species (see insulin, page 417), is a heparin antagonist, which may be used to counteract haemorrhage caused by overdosage of heparin. 

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