Development of Test Method for Thyroid Hormone

In contrast to vertebrates, knowledge of the hormonal systems in arthropods is quite limited and only two hormones are investigated. Ecdysone acts as a 

In the case of fish, although major testing methods have been proposed in relation to sex hormones, there would be plenty of scope for the selection of biologically relevant endpoints. And the research for effects of the other hormones would be the next step. Medaka methods have been comprehensively examined and found to be one of the most excellent protocols. In the case of crustaceans, since it is unclear whether the effects detected are endocrine disrupting or not on daphnids or other aquatic arthropods species, the clarification of fundamental hormonal systems would be imperative. 

Takimoto, International Symposium on Standardization of Medaka Bioresources, Abstract Book, 2005, 63. 

Tatarazako, National Institute for Environmental Smdies, Japan, October, 2005,1 2. 

Endocrine-Disrupting Chemicals, Fish, Medaka, Secondary Sexual Characters, Thyroid Hormones, Daphnids 

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