Ultrastructural and formaldehyde-fluorescence studies on the hypothalamus of Poecilia latipinna (Teleostei, Cyprinodontiformes)

Batten, Trevor; Ingleton, P. M.; Ball, J.N.

doi:10.1016/0016-6480(79)90195-3

Cited by 40 publications

(7 citation statements)

References 68 publications

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“…There is evidence that serotonin and noradrenalin may affect pituitary function (Olcese et al 1984) and the release of prolactin may be affected by levels of serotonin and dopamine (Fiedler et al 1979;James and Wigham 1984). Several studies have also implicated monoaminergic involvement in gonadotropin secretion (Batten et al 1979;Chang et al 1983;Ekengren et al 197g) and there is evidence that serotonin may be under the negative feedback control of estrogen in female goldfish" (Olcese et al 1984). Reproductive behaviour may also be affected by reserpine and chlorpromazine, drugs which alter amine metabolism (Kramer 1972).…”

Section: Introductionmentioning

confidence: 99%

Effect of gender and reproductive status on brain catecholamine and indoleamine levels of flagfish (Jordanella floridae)

Holdway

Sloley

Munkittrick

et al. 1988

Fish Physiol Biochem

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Levels of serotonin, 5-hydroxyindoleacetic acid, tryptophan, noradrenalin and dopamine were determined in whole brains of male (dominant, subordinate, solitary and resting) and female (laying and resting) flagfish (Jordanella floridae) and related to reproductive activity. Levels of serotonin were consistently elevated in sexually active male flagfish, relative to resting males. Dominant males exhibited lower noradrenalin levels than all other groups of fish. Solitary males exhibited higher levels of noradrenalin than dominant males, and were not significantly different from resting males. The lowest levels of tryptophan were apparent in brains of sexually inactive males and females. Neither sex nor reproductive status had a significant impact on 5-hydroxyindoleacetic acid levels. The hatchability of eggs fertilized by solitary males was reduced by over 40% when compared to dominant males.

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Section: Introductionmentioning

confidence: 99%

Effect of gender and reproductive status on brain catecholamine and indoleamine levels of flagfish (Jordanella floridae)

Holdway

Sloley

Munkittrick

et al. 1988

Fish Physiol Biochem

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“…Histofluorescence technique and its glyoxylic acid variants have provided the first powerful tools to investigate the complexity of central monoaminergic systems in teleosts (Ekengren, 1975;Fremberg et al, 1977;Parent et al, 1978;Terlou et al, 1978;Batten et al, 1979;Watson, 1980; Kotrschal and Adam, 1983;Parent, 1983) and particularly in goldfish brain (Baumgarten and Braak, 1967). More recently, by use of the immunohistochemical techniques and antibodies directed either against biosynthetic enzymes of monoamines or monoamines themselves, each monoaminergic neuronal subset has been specifically labelled.…”

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confidence: 99%

Immunolocalization of aromatic L‐amino acid decarboxylase in goldfish (Carassius auratus) brain

Beltramo

Krieger

Tillet

et al. 1994

J of Comparative Neurology

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The distribution of monoamines (catecholamines and serotonin) in fishes has been previously studied by immunohistochemistry of both the monoamines themselves and their biosynthetic enzymes. But the distribution of neurons containing aromatic L-amino acid decarboxylase, an enzyme involved in the biosynthesis of both catecholamines and serotonin, has up to now not been investigated. In order to improve knowledge about the localization of aromatic L-amino acid decarboxylase, neurons containing this enzyme were mapped immunohistochemically in the goldfish brain. Furthermore, neurons bearing aromatic L-amino acid decarboxylase immunoreactivity have been compared with those containing tyrosine hydroxylase and serotonin immunoreactivities. Our results show that distribution of aromatic L-amino acid decarboxylase immunoreactivity generally coincides with that of tyrosine hydroxylase and serotonin. Nevertheless, the presence of nine D cell groups (containing aromatic L-amino acid decarboxylase but lacking both catecholamines and serotonin) and six groups of neurons which are aromatic L-amino acid decarboxylase-immunonegative but contain tyrosine hydroxylase, and might produce L-DOPA, have been revealed. The occurrence of both D cell groups and presumptive L-DOPA neurons in goldfish brain is discussed in relation to similar findings in fish and mammalian brain.

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“…Most of the studies on hypothalamic monoaminergic system of teleosts are concerned with histochemical/immunocytochemical localization of monoamines in the hypothalamo-hypophyseal system (Terlou et al 1978;Batten 1979; Kah and Chambolle 1983; Ekstr6m and van Veen 1984; Peute et al 1987). In teleosts, the nucleus recessus lateralis and the nucleus recessus posterioris, homologues of paraventricular organ of higher vertebrates contain monoaminergic neurons innervating the nucleus preopticus, the nucleus lateralis tuberis and the hypophysis (Terlou et al 1978).…”

Section: Discussionmentioning

confidence: 99%

Differential effects of photoperiod and temperature on hypothalamic monoaminergic activity in the teleost Channa punctatus (Bloch)

Khan

Joy

1990

Fish Physiol Biochem

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In Channa punctatus maintained under ambient photothermal conditions (10.5L:13.5D; 13 ± 2°C) in the postspawning season, hypothalamic dopamine (DA) and norepinephrine (NE) content varied diurnally, but serotonin (5-HT) and monoamine oxidase (MAO) did not. Exposure of the fish to high temperature (25 ± 2°C), with or without altering the photopheriod, increased the NE and DA content, and NE turnover but decreased DA turnover. Increasing the photoperiod (16L:8D) alone had no significant effect on catecholaminergic (CA) content or activity. When the fish were exposed to long photoperiod, with or without altering the temperature, a day-night variation in 5-HT content and activity was induced in the postspawning season. An increase in temperature alone had no significant effect on 5-HT content or activity. Hypothalamic MAO activity was elevated in fish exposed to high temperature alone, or in combination with long photoperiod, but was not affected significantly by long photoperiod treatment. These results indicate that CA activity is influenced largely by ambient high temperature, whereas serotonergic activity is controlled primarily by photoperiod, with high temperature having an additive effect. MAO activity seems to be influenced by both temperature and photoperiod in this species.

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Ultrastructural and formaldehyde-fluorescence studies on the hypothalamus of Poecilia latipinna (Teleostei, Cyprinodontiformes)

Cited by 40 publications

References 68 publications

Effect of gender and reproductive status on brain catecholamine and indoleamine levels of flagfish (Jordanella floridae)

Effect of gender and reproductive status on brain catecholamine and indoleamine levels of flagfish (Jordanella floridae)

Immunolocalization of aromatic L‐amino acid decarboxylase in goldfish (Carassius auratus) brain

Differential effects of photoperiod and temperature on hypothalamic monoaminergic activity in the teleost Channa punctatus (Bloch)

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