Annual changes in plasma and liver in relation to vitellogenesis in the female rainbow trout, Salmo gairdneri

Bohemen, Ch.G. van; Lambert, J.G.D.; Peute, J.

doi:10.1016/0016-6480(81)90360-9

Cited by 137 publications

(70 citation statements)

References 24 publications

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“…Vitellogenin is a glycolipophosphoprotein containing 79% proteins and 19% lipids, with 70% phospholipids, in the rainbow trout [100]. It is synthesised in the liver in response to estrogenic stimulation [101][102][103], like most of zona radiata proteins (ZrP) in many species [104]. After leaving the blood vessels, vtg goes through the follicle wall and is selectively incorporated into the oocyte [105], by receptor-mediated endocytosis [106,107].…”

Section: Vitellogenesismentioning

confidence: 99%

Particularities of reproduction and oogenesis in teleost fish compared to mammals

2005

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-Compared to mammals, teleost reproduction presents many original features. Reproductive strategies of species are diversified into numerous adaptations to a large variety of aquatic environments. This diversity may concern sexuality, spawning and parental behaviour, sensitivity to environmental factors, and specific features of gametogenesis such as the duration of vitellogenesis, and egg morphology. Sexuality presents a variety of natural modalities, from gonochorism to hermaphrodism. The absence of definitive arrest of body growth in the adult of most species gives a particular interest to the practical control of growth-reproduction interactions. Vitellogenesis, which represents an important metabolic effort for the maternal organism, involves the synthesis of vitellogenin, a specific glycolipo-phosphoprotein produced in the liver under estradiol stimulation, and its incorporation into oocytes by a receptor mediated process. Both estradiol synthesis in follicle cells and vtg uptake by vitellogenic follicles appear to be mainly controlled by FSH. Oocyte maturation is directly triggered by a progestin, or MIS (maturation inducing steroid) synthesised in follicle cells mainly under LH control, and acting through the non-genomic activation of a membrane receptor. Practical applications of some of these particularities result mainly from the external character of the fertilisation process and of embryonic development, which allows manipulating respectively egg chromosome stocks and sex differentiation. Moreover, the sensitivity of sex differentiation to exogenous factors favours the development of practical methods to control the sex of farmed populations. Finally, the sensitivity of reproductive mechanisms to xenobiotics has led to various kinds of bioassays for putative pollutants.reproductive strategies / sexuality / spawning / vitellogenesis / oocyte maturation / fertilisation

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Section: Vitellogenesismentioning

confidence: 99%

Particularities of reproduction and oogenesis in teleost fish compared to mammals

2005

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“…The HSI may also vary between species of teleosts, due to the differences in energy storage capacity, physiological condition, feeding habits, and nutrient availability (Svedäng & Wickström, 1997). In the mature stage, female hepatocytes of S. insculpta showed RERs with proliferated cisterns arranged in parallel stacks, observed also by Bohemen et al (1981) and Gillis et al (1990). According to Peute et al (1978), rapid proliferation of rough endoplasmic reticula results from increasing vitellogenin production.…”

Section: Discussionmentioning

confidence: 99%

“…During the later stages of vitellogenesis, large amounts of yolk material, requiring fat and protein from dietary and somatic sources, are absorbed by the oocytes (Bohemen et al, 1981). Many fish stop feeding during the gonadal maturation period that precedes spawning and leads to a loss in total body and hepatic weights (Tveranger, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, gonadossomatic (GSI) and hepatossomatic (HSI) indexes are accurate parameters for determining reproductive periodicity (Maddock & Burton, 1999). In addition, differences in the distribution and degree of proliferation of rough endoplasmic reticulum (RER), smooth endoplasmic reticulum (SER), and mitochondria in the hepocytes may be related to oogenesis during ovarian maturation (Peute et al, 1978;Bohemen et al, 1981;Gillis et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae)

et al. 2006

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During gonadal maturation the females of Steindachnerina insculpta, a teleost of the Furnas reservoir, Minas Gerais, Brazil, show low hepatosomatic and high gonadossomatic indexes, suggesting possible transference of hepatic substances to the ovaries. In comparison to the resting phase, in the maturation/ mature one the hepatocytes show greater development of both smooth and rough endoplasmic reticula, increased electron density in the mitochondria, and glycogen scattered throughout the cytoplasm. In both resting and maturation/mature phases, the hepatic parenchyma contains melanomacrophagic centers that consist of degenerating cellular debris and are surrounded by capsules formed by cells, resembling fibroblasts, joined by desmosomes. No physiological relation of these centers with ovarian maturation was found.Keywords: teleost fish, ovarian maturation, hepatocytes. resumo mudanças ultra-estruturais nos hepatócitos de fêmeas de Steindachnerina insculpta (Pisces: curimatidae) durante a maturação ovariana Fêmeas de Steindachnerina insculpta, um teleósteo do reservatório de Furnas, Minas Gerais, Brasil, apresentaram, durante a maturação gonadal, um baixo índice hepatossomático e um alto índice gonadossomático, sugerindo que substâncias hepáticas são provavelmente transferidas para os ovários. Comparando-se fêmeas no estádio de repouso com aquelas no estádio maturação/maduro, observaramse nos hepatócitos de fêmeas no estádio maturação/maduro maior desenvolvimento do retículo endoplasmático rugoso e liso, mitocôndrias com densidade eletrônica aumentada e glicogênio espalhado por todo citoplasma. No estádio de repouso, assim como no estádio de maturação/maduro, observaram-se, no parênquima hepático, centros melanomacrofágicos constituídos de restos celulares em degeneração delimitados por cápsula contendo células semelhantes a fibroblastos unidas por desmosomas. Não foram observadas relações fisiológicas entre os centros melanomacrofágicos e a maturação dos ovários.Palavras-chave: peixe-teleósteo, maturação ovariana, hepatócitos.

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“…Ils régulent aussi le métabolisme des glucides et des lipides en contrôlant la mobilisation des lipides à partir des réserves de graisses et la mobilisation du calcium à partir des écailles (Fostier et al 1983). Cette activité hépatique accrue, marquée chez de nombreuses espèces par l'augmentation de l'indice hépatosoma-tique (exprimé comme le rapport entre le poids du foie et le poids total du poisson) (Delahunty & de Vlaming 1980, Van Bohemen et al 1981, Haug & Gulliksen 1988, Rinchard 1996, provoque au niveau du foie un accroissement du taux de protéines (Medford & Mackay 1978, Korsgaard 1990, Rinchard 1996 et une diminution du taux de phospholipides, de triglycérides (Haux & Norberg 1985, Singh & Singh 1990) ainsi que celui du glycogène (Sand et al 1980, Dasmahapatra & Medda 1982, Pacoli et al 1991. (Fig.…”

Section: Régulation Stéroïdienneunclassified

Croissance ovocytaire et régulation stéroïdienne chez les poissons à pontes unique et multiples : une revue

Rinchard

Poncin

Kestemont

1998

Ann. Limnol. - Int. J. Lim.

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Annual changes in plasma and liver in relation to vitellogenesis in the female rainbow trout, Salmo gairdneri

Cited by 137 publications

References 24 publications

Particularities of reproduction and oogenesis in teleost fish compared to mammals

Particularities of reproduction and oogenesis in teleost fish compared to mammals

Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae)

Croissance ovocytaire et régulation stéroïdienne chez les poissons à pontes unique et multiples : une revue

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