Multivariate Analysis of Correlations Between Environmental Parameters and Cadmium Concentrations in Hyalella azteca (Crustacea: Amphipoda) from Central Ontario Lakes

Abstract

1988. Multivariate analysis of correlations between environmental parameters and cadmium concentrations in Hyalella azteca (Crustacea: Amphipda) from central Ontario Bakes. Can. j. Fish. Aquat. Sci. 45: 1705-1 75 0.Cadmium concentrations in Hyalelda azteca collected from 69 central Ontario Bakes ranged from 8.1 3 to 56.6 kg/$ dry mass. Principal components analysis followed by multiple linear regression found three principal components, interpreted as water hardness, total cadmium, and dissolved organic carbon concentrations, to be significantly (p =S 0.002) correlated with cadmium concentrations in H. azteca. Cadmium concentrations in H.azteca were independent of cadmium concentrations in littoral sediments. It is suggested that cadmium ions compete with calcium ions for uptake sites on the gill surfaces of H. azteca. High concentrations of dissolved organic carbon may complex free cadmium ions and reduce their concentration in solution, leading to lower cadmium concentrations in H. azteca.Les teneldrs en cadmium chez des specimens d'Hyalella azteca prelev6s dans 69 Bacs du centre de ItOntario 6taient comprises entre 0,13 et 56,6 de masse sGche. L'analyse des cornposantes principales suivie d'une regression lineaire multiple a permis de dkceler une correlation significative (p 0,002) entre trois grandes composantes (durete de I'eau, cadmium total et concentration en carbone organique dissous) et les teneurs en cadmium relevees chez H. azteca. Les teneurs en cadmium chez H. azteca 6taient independantes de la teneur en cadmium des sgdiments Iittoraux. Ces donnees semblent indiquer que les ions cadmium rivalisent avec les ions calcium pour les sites de fixation la surface des branchies chez H. azteca. Des teneurs elevees en carbone organique dissous peuvent former des complexes avec des ions cadmium libres et r a u i r e Jeur concentration dans la solution, ce qui entraine des tenem en cadmium plus faibles chez 68. azteca.

Accumulation, regulation and toxicity of copper, zinc, lead and mercury in Hyalella azteca

“…At the end of the experiments the surviving amphipods were dried at 60 OC, and digested as described in Borgmann et al (1991) using the procedure of Stephenson & Mackie (1988). Twenty-five p1 of 70% nitric acid was added to 1 to 4 amphipods (0.5 to 2 mg dry weight), and allowed to sit for 1 week.…”

“…It can also be readily collected in the field for studies on metal levels in wild populations (e.g. Stephenson & Mackie, 1988). It should, therefore, be a useful organism for elucidating the relative contributions of different metals to toxicity, both in the field and in laboratory assays (e.g.…”

Reduced Metals Concentrations of Water, Sediment and Hyalella Azteca from Lakes in the Vicinity of the Sudbury Metal Smelters, Ontario, Canada

“…Excluding data for Raft Lake where only two animals were sampled, Cd concentrations in H. azteca ranged from 0.46 to 12.5 μg g −1 dry weight. Stephenson and Mackie (1988) reported that Cd concentrations in H. azteca from central Ontario lakes ranged from 0.13 to 37.3 μg g −1 dry weight. The authors also reported from 1984 sampling in Richard, McFarlane and Kakakiwaganda Lakes that Cd concentrations in H. azteca were 17.8, 12.3 and 5.12 μg g −1 dry weight, higher than the current results of 11.0, 4.0 and 4.5 μg g −1 dry weight respectively, indicating a significant reduction after 14 years.…”

Toxic Effects and Bioaccumulation of Cadmium in the Aquatic Oligochaete Tubifex tubifex

“…Metal uptake is also related to water quality, including hardness and pH (Wang, 1987). Working in distilled water avoids interactions between Cd and other cationic ions, such as Ca> and Mg>, which may compete with Cd for biological sites, and anionic ions such as CO\ , which may coprecipitate with Cd, reducing its bioavailability (Stephenson and Mackie, 1988).…”