Life Cycle of Goeldichironomus holoprasinus Goeldi (Diptera:Chironomidae) in laboratory

ZILLI, FLORENCIA; MARCHESE MERCEDES ROSA; PAGGI, ANALÍA CONSTANCIA

NEOTROPICAL ENTOMOLOGY

ENTOMOLOGICAL SOC BRASIL

Lugar: Piracicaba; Año: 2009 p. 472 - 476

1519-566X

The larvae of Chironomidae are very important due to their density and role in aquaticfood webs. Goeldichironomus holoprasinus Goeldi is one of the most abundant species of Chironomidaein man-made and natural systems, being widely used in water quality assessments. Because of itstolerance to stressing environmental factors, many studies have investigated the effects of stressorson G. holoprasinus anatomy and bionomic attributes. The main aim of this work was to describe G.holoprasinus life cycle attributes in laboratory conditions. The cephalic capsule growth among instarswas 1.64 in average (Dyar proportion), whereas the total size growth was continuous. The average roomtemperature registered was 26ºC (18-33°C). In this conditions the D value (time from oviposition tofirst imago emergence) was 13 days, whereas the minimum G value (interval from the oviposition to thefirst progeny of the next generation) was 16 days. The emergence lasted four days, which determinedthat average G of 18 days. Thus, at registered temperatures G. holoprasinus has a short life cycle.