The reproductive cycle of male and female brown trout (Salmo trutta fario): a quantitative study

Billard, Roland

doi:10.1051/rnd:19870104

Cited by 48 publications

(38 citation statements)

References 21 publications

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“…In contrast to mammals, oogonia keep on proliferating in adult females [75] thus renewing the stocks of young oocytes and follicles. Oogonial mitosis may generally be observed more easily within the germinative epithelium after ovulation when the ovarian tissues are reorganising [76,77] or in the remnant ovary just after unilateral ovariectomy [78]. At ovulation, mature oocytes are released from their follicle into the ovarian cavity, before being laid outside through the oviduct and the genital papilla.…”

Section: Ovary Ovarian Follicle and Oocytementioning

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: Ovary Ovarian Follicle and Oocytementioning

confidence: 99%

Particularities of reproduction and oogenesis in teleost fish compared to mammals

2005

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“…The diameters of 40 opaque oocytes per female were measured (showing the incorporation of vitellin reserves). The GSI and the oocyte diameter were analysed by comparison with Billard's (1987) results for brown trout (Sulmo truffa L.). The weight of both gonads was recorded in the male, to assess the state of maturing in summer, when the GSI approaches zero (males were considered in spermatogenesis when testes attained or were greater than a total weight of 0.2 g).…”

Section: Samplingmentioning

confidence: 99%

Sexual maturity in sea trout, Salmo trutta L., running up the River Calonne (Normandy, France) at the ‘finnock’ stage

Maisse

Mourot

Breton

et al. 1991

Journal of Fish Biology

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Sexual maturation in sea trout (Salmo lrutlo L.) running up the River Calonne (Normandy, France), at the finnock stage, is characterized. Autopsy of I18 finnock in summer showed that 87k7Yo aged 2+ and 33_+ 15% aged 1 + were undergoing gametogenesis. In autumn all the fish were maturing. The analysis of plasma levels of 1 1-ketotestosterone, 17~-0estradiol, maturational gonadotropin and vitellogenin showed that only females in vitellogenesis can be well identified in summer (plasma vitellogenin greater than 0.30 mg ml-I). The morphological recognition of females among 134 autumn finnock and the ELISA assay of plasma vitellogenin of 814 summer finnock, demonstrated that vitellogenic females represented 12+2%0 of the 1 + individuals and 46*2%0 of 2+ fish captured during the 1985 run. The question of a possible relationship between the salinity tolerance ofjuvenile trout migrating towards the sea in the spring and their age on first migration in the river is discussed.

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“…F043332). Hassanin et al, 2002;Sivakumaran et al, 2003;Snyder et al, 2004;Carballo et al, 2005), rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) (Bromage and Cumaranatunga, 1988;Springate et al, 1985), brown trout (Salmo trutta morpha fario, Linnaeus, 1758) (Billard, 1987), grass carp (Ctenopharyngodon idella, Valenciennes, 1844) (Horváth, 1985;Glasser et al, 2003) and African catfish (Clarias gariepinus, Burchell, 1822) (Van den Hurk, 1984), the wels catfish (Silurus glanis L., 1758) (Hochman, 1967), and of course, sturgeons (Acipenseridae) necessary for the production of caviar (Doroshov, 1985).…”

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confidence: 99%

Comparison of ovarian cycles of Hungarian riverine fish species representing different spawning strategies 441

et al. 2008

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ABSTRACT:Investigations on the ovarian cycle of fish species that inhabit Hungarian rivers are necessitated by both environmental and economic reasons. The objective of our research was to explore new fundamental knowledge concerning the ovarian cycle of the white bream (Blicca bjoerkna, Linnaeus, 1758), barbel (Barbus barbus, Linnaeus, 1758), orfe (Leuciscus idus, Linnaeus, 1758) and nase (Chondrostoma nasus, Linnaeus, 1758). Histological investigation of ovaries and determination of proportions of oocytes in different stages of development is an appropriate method for the description of spawning characteristics of these species. Our results show that the GSI value for all four investigated species starts to increase at the end of summer and reaches its maximum before spawning. In the barbel and white bream, the presence of oocytes in the stage of cortical alveoli and the heterogeneous size of oocytes in the stage of vitellogenesis in the pre-spawning period indicate that barbel and white bream are multiple spawners. In contrast, in the orfe and nase, the absence of oocytes in the stage of cortical alveoli and the homogeneous size of cells in the stage of vitellogenesis indicate that orfe and nase are single spawners.

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The reproductive cycle of male and female brown trout (Salmo trutta fario): a quantitative study

Abstract: Summary. Gonadal development and gametogenesis have been studied in the brown trout ( Salmo trutta) Introduction.

Cited by 48 publications

References 21 publications

Particularities of reproduction and oogenesis in teleost fish compared to mammals

Particularities of reproduction and oogenesis in teleost fish compared to mammals

Sexual maturity in sea trout, Salmo trutta L., running up the River Calonne (Normandy, France) at the ‘finnock’ stage

Comparison of ovarian cycles of Hungarian riverine fish species representing different spawning strategies 441

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