کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9451603 | 1307831 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Production of male neonates in four cladoceran species exposed to a juvenile hormone analog, fenoxycarb
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
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![عکس صفحه اول مقاله: Production of male neonates in four cladoceran species exposed to a juvenile hormone analog, fenoxycarb Production of male neonates in four cladoceran species exposed to a juvenile hormone analog, fenoxycarb](/preview/png/9451603.png)
چکیده انگلیسی
Previous studies have found that exposure of a cyclic parthenogen, the water flea Daphnia magna (Cladocera, Crustacea), to juvenile hormones and their analogs results in the production of neonates of male sex at concentration-dependent rates. We conducted reproduction experiments in four different species (Moina macrocopa, M. micrura, Ceriodaphnia dubia and C. reticulata) of cladoceran to test for the first time whether the occurrence of this phenomenon after exposure of the parent to such hormones is a generalized phenomenon. In the presence of a juvenile hormone analog, fenoxycarb, all four species produced male neonates and showed reduced rates of reproduction. The estimated median effective concentration (EC50) for the production of male neonates varied with species, ranging from 0.60Â ÃÂ 103 to 9.3Â ÃÂ 103Â ng/l. Although there was a wide range of sensitivity to fenoxycarb, the production of male neonates in all four species demonstrates that this phenomenon is a common response to juvenile hormone analogs and further suggests that these hormones are capable of initiating sexual reproduction in cladocerans, most of which exhibit cyclic parthenogenesis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 60, Issue 1, June 2005, Pages 74-78
Journal: Chemosphere - Volume 60, Issue 1, June 2005, Pages 74-78
نویسندگان
Shigeto Oda, Norihisa Tatarazako, Hajime Watanabe, Masatoshi Morita, Taisen Iguchi,