Malathion (Organik Fosforlu Insektisit)’un Daphnia magna Straus, 1820 (Crustacea, Cladocera) Üzerindeki Toksik Etkilerinin Araştırılması

Bu çal›flmada Daphnia magna yavrular›nda (≤ 24 saatlik) teknik düzeydeki (%95) malathion ve ticari (%25) malathionun toksik etkileri statik, akut toksisite denemeleriyle (24 ve 48 saatlik) araflt›r›lm›flt›r. D. magna kültürü ve toksisite denemeleri, 24±1ºC s›cakl›k ve 16 saat ›fl›k / 8 saat karanl›k fotoperiyodunda düzenlenmifltir. Sa¤l›kl› bir populasyon elde etmek için, her bir difli ferdin hayat› boyunca meydana getirdi¤i yavrular›n say›s› da araflt›r›lm›flt›r. 24 / 48 saat %50 etki konsantrasyonunun (EC50) saptanmas› için dafnidlerin hareket durumu dikkate al›nm›flt›r. EC50 de¤erleri, istatistiksel olarak probit metodu ile 24 / 48 saat s›ras›yla, teknik malathion için 0.8 ve 0.028 ppm., ticari malathion için 0.11 ve 0.003 ppm bulunmufltur.

An Investigation on the Toxic Effects of Malathion (Organophosphate Insecticide) on the Daphnia magna Straus, 1820 (Crustacea, Cladocera)

The toxic effects of technical grade (95 %) malathion and commercial (25 %) malathion were investigated on young (£ 24 h old) Daphnia magna in static acute toxicity tests (24 and 48 h). The culture of D. magna and toxicity tests were performed at 24 ± 1 ºC with a photoperiod of 16 h light and 8 h dark. To obtain a healthy population, the fecundity of each female in their life cycle was also investigated. The immobilization of daphnids was considered for determination of the 24 h / 48 h effective concentration (50 %). The EC50 values were found by the probit method 24 h /48 h for technical malathion as 0.8 and 0.028 ppm., and for commercial malathion as 0.11 and 0.003 ppm respectively.
Turkish Journal of Zoology-Cover
  • ISSN: 1300-0179
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK
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