Ebau, Warrin
(2010)
Study On The Biology And Heavy Metal
Toxicity On Chironomus Kiiensis
Tokunanga And Chironomus Javanus
Kieffer (Diptera: Chironomidae).
Masters thesis, Universiti Sains Malaysia.
Abstract
Chironomus kiiensis Tokunanga and Chironomus javanus Kieffer were found
to be suitable for use as test organism in both aquatic and sediment toxicity tests.
Both species have a relatively short life cycle (C. kiiensis = 20.86 days and C.
javanus = 15.14 days) and easy to culture under laboratory conditions using the same
method and food. Both species were found to have four instar stages each with C.
javanus having longer body and bigger in size. It is difficult to differentiate these two
species at larval stages by naked eyes as they look similar. The apparent
characteristic that differentiates C. javanus with C. kiiensis is the unusual teeth
number (7 teeth) in the premandible. However, these two species were easy to
differentiate at adult stage where C. kiiensis is yellowish brown in colour while C.
javanus is greenish in colour.
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