In goldfish, serum concentrations of T3 are high during summer when fish have maximum growth rates; circulating T3 then follows a decreasing trend from fall through spring, reaching minimum levels in the spawning period ( 60 ).
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Seasonal Related Multifactorial Control of Pituitary Gonadotropin and Growth Hormone in Female Goldfish: Influences of Neuropeptides and Thyroid Hormone.
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