Site specific differentiation in metal tolerance in the midge Chironomus riparius (Diptera, Chironomidae)

Abstract

Site specific differentiation in metal tolerance in the midge, Chironomus riparius (Diptera: Chironomidae) Postma, J.F.; Kyed, M.; Admiraal, W. Published in: Hydrobiologia DOI:10.1007/BF00033628 Link to publicationCitation for published version (APA): Postma, J. F., Kyed, M., & Admiraal, W. (1995). Site specific differentiation in metal tolerance in the midge, Chironomus riparius (Diptera: Chironomidae). Hydrobiologia, 315, 159-165. DOI: 10.1007/BF00033628 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Key words : Chironomus riparius, metal tolerance, Cd, Zn, Fe Abstract Metal tolerance in Chironomus riparius (Diptera) populations from contaminated streams was studied by comparing the effects of cadmium, zinc and iron on first generation laboratory reared midges . First instar larvae were exposed for four days, after which surviving larvae were counted and their length measured . Larvae from two highly polluted sites, kept under control conditions, grew substantially slower than those from other populations . All populations showed the same growth responses to increased zinc concentrations, but differences were found in the responses to both cadmium and iron . Since population differentiation was demonstrated in first generation laboratory animals, it is suggested that the differences between populations of C . riparius have a genetic basis . Download date: 11 May 2018

Interacting Effects of Toxicants and Organic Matter on the Midge Chironomus riparius in Polluted River Water

“…It is clear that the response of C. riparius to a toxicant in polluted river water is di!erent from the response to similar toxicant levels in reference water. In EGD 1 water growth inhibition was only 15% while, based on the results of Postma et al (1995), an inhibition of 93% was expected (when assuming concentration additivity of zinc and cadmium).…”

“…2, darkshaded bars) was determined by calculating a dose}re-sponse relationship for both metals according to Haanstra et al (1985). The larvae used by Postma et al (1995) originated from the same laboratory culture as the larvae used in the present study, and the experimental setup is similar to that of Postma et al (1995). It is clear that the response of C. riparius to a toxicant in polluted river water is di!erent from the response to similar toxicant levels in reference water.…”

“…Growth data from the bioassays were compared with laboratory-derived toxicity data for similar zinc and cadmium levels, calculated from Postma et al (1995). The expected zinc and cadmium growth inhibition (Fig.…”

“…Growth is presented as percentages of controls. Expected growth inhibition due to zinc and cadmium are calculated from the growth toxicity data of Postma et al (1995).…”

Bioaccumulation of metals in aquatic insects of streams located in areas with sugar cane cultivation

“…30 Some studies have demonstrated that cadmium, in high concentrations in the aquatic environment, causes changes in the growth of some insects, as larvae of Chironomus riparius. 31 Some researchers as 32 studying in forested and in impacted streams, pointed that aquatic insetcs as mayflies accumulate higher concentrations of Cd than caddisflies and stoneflies.…”