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Annual changes in plasma and liver in relation to vitellogenesis in the female rainbow trout, Salmo gairdneri.
As part of a study on the physiological participation of ovarian steroids in the regulation of the synthesis of vitellogenin in the liver of the rainbow trout, Salmo gairdneri, an inventory was madeExpand
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Evolutionary development of three gonadotropin-releasing hormone (GnRH) systems in vertebrates
Gonadotropin-releasing hormone (GnRH) is the neuropeptide that links the brain to the reproductive system. Most vertebrate species express two forms of GnRH, which differ in amino acid sequence,Expand
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Distribution of catecholaminergic and serotoninergic systems in forebrain and midbrain of the newt, Triturus alpestris (Urodela)
SummaryMapping of monoaminergic systems in the brain of the newt Triturus alpestris was achieved with antisera against (1) thyrosine hydroxylase (TH), (2) formaldehyde-conjugated dopamine (DA), andExpand
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Localization of aromatase in the brain of the male African catfish, Clarias gariepinus (Burchell), by microdissection and biochemical identification
Aromatase activity was determined in small discrete areas of the brain of the African catfish, Clarias gariepinus, by a radiometric assay. The fore‐and midbrain were divided into eighteen 500‐μmExpand
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Distribution of serotonin- and dopamine-immunoreactivity in the brain of the teleost Clarias gariepinus
The distribution of serotonergic and dopaminergic cell bodies and varicose fibres in the brain of the teleost Clarias gariepinus was studied immunohistochemically using antisera againstExpand
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Cyclic changes in the ovary of the rainbow trout, Salmo gairdneri, with special reference to sites of steroidogenesis
SummaryIn the maturation cycle of ovaries of cultured rainbow trout, three periods can be distinguished: (1) a period of ovulation and previtellogenesis (January–May), (2) a period of exogenousExpand
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Two gonadotropin-releasing hormones in the African catfish, Clarias gariepinus: localization, pituitary receptor binding, and gonadotropin release activity.
Two GnRH peptides have recently been identified in brain extracts of the African catfish, chicken-II GnRH ([His5,Trp7,Tyr8]GnRH, cGnRH-II) and catfish GnRH ([His5,Asn8]GnRH, cfGnRH). Using threeExpand
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Expression and distribution of two gonadotropin-releasing hormones in the catfish brain.
The expression of prepro-catfish GnRH mRNA and prepro-chicken GnRH-II mRNA was investigated by means of in situ hybridization. The differential distribution of cells expressing the respective mRNAsExpand
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Testosterone accelerates the development of the catfish GnRH system in the brain of immature African catfish (Clarias gariepinus).
The effects of two endogenous steroids on the maturation of the catfish GnRH and the chicken GnRH-II system in the African catfish were investigated. Immature fish (2 weeks of age, which is beforeExpand
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The seminal vesicle of the African catfish, Clarias gariepinus
SummaryThe seminal vesicle of the African catfish, Clarias gariepinus, consists of 36–44 fingerlike lobes built up of tubules in which a fluid is secreted containing acid polysaccharides, acid-,Expand
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