THE GROWTH OF Tanypus punctipennis Meigen (DIPTERA, CHIRONOMIDAE) LARVAE IN LABORATORY CONDITIONS AND THE EFFECTS OF WATER TEMPERATURE AND pH

Year 2018, Volume: 19 Issue: 1, 101 - 105, 14.04.2018

Firuze Gülbunar Gazel Burcu Aydın Belgin Çamur-elipek

https://doi.org/10.23902/trkjnat.356750

Cited By: 4

Abstract

Recent
taxonomic studies suggest that findings of larval chironomids should be
supported also by adult findings in order to obtain more robust and reliable
results on the studied group. Moreover identifications of larvae of some
species can be made to genus level only due to similarities of some larval
characteristics in different species. In such cases, species level
identifications can be achieved by the growth of larvae in laboratory
conditions. Also, larval culturing under optimum growth conditions will not
only make it easy to provide materials for experimental studies and but also
achievement of larvae with a higher biomass value to be used as food in the
sector. In this study, Tanypus
punctipennis Meigen (Diptera, Chironomidae), a very common species in Turkish Thrace, was used
as the model organism for culture studies. Individual larvae were cultured from
third instar stage to adult form under laboratory conditions. A simple and
cheap method is offered for experimental studies on larval growths of chironomids
and the effects of water temperature and pH, both with very important roles in
larval culturing, were determined. The overall results of laboratory tests
showed that the temperature value of 25°C and 7-8 pH interval were the optimal
laboratory conditions for culture of T.
punctipennis larvae.

Keywords

Freshwater, midge, environmental conditions, rearing, identification

THE GROWTH OF Tanypus punctipennis Meigen (DIPTERA, CHIRONOMIDAE) LARVAE IN LABORATORY CONDITIONS AND THE EFFECTS OF WATER TEMPERATURE AND pH

Abstract

Son
zamanlarda yapılan taksonomik çalışmalarda larval chironomidlerin erginleri ile
birlikte değerlendirilmesinin daha güvenilir sonuçlar verdiği belirtilmektedir.
Ayrıca, bazı türlerin teşhisleri, larval safhadaki bazı karakterlerin türler
arasındaki benzerlikleri nedeniyle ancak cins düzeyine kadar yapılabilmektedir.
Bu durumda larvaların laboratuvar koşullarında yetiştirilerek erginleştirilmesi
sayesinde tür düzeyinde teşhisleri mümkün olabilmektedir. Ayrıca, uygun
yetiştirme koşulları belirlenerek yapılan larva yetiştiriciliği, bir taraftan
deneysel çalışmalarda gerekli materyalin eldesi için kolaylık sağlarken, diğer
taraftan balık yemi sektöründe daha ileri instar evrelerine ve dolayısıyla
yüksek biyomass değerine hızla erişecek larva temini için de yararlı olacaktır.
Bu araştırmada, yetiştirme çalışmaları için model tür olarak Trakya’da oldukça
yaygın olan Tanypus punctipennis Meigen
(Diptera, Chironomidae) larvaları kullanıldı. Bireyler, üçüncü instar
safhasından ergin forma erişinceye dek laboratuvar koşullarında yetiştirildi.
Böylelikle, laboratuvar koşullarında larval chironomid yetiştirme amaçlı
çalışmalar için basit ve ucuz bir yöntem deneyimlenerek sunulurken, larvaların
yetişmesinde oldukça önemli rolü olan su sıcaklığı ve pH gibi çevresel faktörlerin
etkileri de araştırıldı. Çalışmanın sonucunda T. punctipennis larvalarının gelişiminde 25°C ve 7-8 pH aralığının
en uygun koşullar olduğu belirlendi.

Keywords

Freshwater, midge, environmental conditions, rearing, identification

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