Joint and single toxicity of Cd and Fe related to metal uptake in the mayflyLeptophlebia marginata(L.) (Insecta)

✍ Scribed by A. Gerhardt

• Book ID: 104614344
• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 933 KB
• Volume: 306
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00017693

✦ Synopsis

The toxic effects of Cd and Fe on the mayfly Leptophlebia marginata were tested during single and joint exposure to the metals . Data on uptake and localization of the metals were related to the following biological parameters : survival, food consumption (% gut contents) and activity (escape from prodding) .

The uptake of Cd by L. marginata was significantly reduced by the presence of Fe (p<0 .0005) .

Fe e+-and Fe 3 +-crusts on the gills, body surface and on the gut membrane precipitated when the mayflies were exposed to either Fe alone or to Fe and Cd . This caused decreased food consumption by the mayflies .

In the pigments of the eyes and the cuticle Fe 2+ was found . Exposure to Cd led to disturbances in Cl -and K+ ion balance, which were ameliorated by additional Fe-exposure due to co-precipitation processes .

Exposure to Cd caused an increase in the concentrations of S and P in the mayflies . Whereas Fe caused sublethal effects (food consumption) without being taken up into the organism . Cd caused lethal effects (inactivity, death) due to disturbances of the ion balance at the membranes .