Oogenesis in teleosts: How fish eggs are formed

Lubzens, Esther; Young, Graham; Bobe, Julien; Cerdà, Joan

doi:10.1016/j.ygcen.2009.05.022

Cited by 949 publications

(798 citation statements)

References 257 publications

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“…During vitellogenesis eggs will be loaded with lipids and other reserves needed for embryogenesis after fertilization (Wiegand 1996; Lubzens et al. 2010), and the size of eggs will increase up to ovulation (Dlugosz and Worniallo 1985). Primordial germ cells and first‐stage oogonia can be observed in coregonids already at the juvenile stage (Krol et al.…”

Section: Discussionmentioning

confidence: 99%

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Phenotypic plasticity in growth and fecundity induced by strong population fluctuations affects reproductive traits of female fish

Urpanen

Keskinen

Huuskonen

et al. 2016

Ecology and Evolution

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Fish are known for their high phenotypic plasticity in life‐history traits in relation to environmental variability, and this is particularly pronounced among salmonids in the Northern Hemisphere. Resource limitation leads to trade‐offs in phenotypic plasticity between life‐history traits related to the reproduction, growth, and survival of individual fish, which have consequences for the age and size distributions of populations, as well as their dynamics and productivity. We studied the effect of plasticity in growth and fecundity of vendace females on their reproductive traits using a series of long‐term incubation experiments. The wild parental fish originated from four separate populations with markedly different densities, and hence naturally induced differences in their growth and fecundity. The energy allocation to somatic tissues and eggs prior to spawning served as a proxy for total resource availability to individual females, and its effects on offspring survival and growth were analyzed. Vendace females allocated a rather constant proportion of available energy to eggs (per body mass) despite different growth patterns depending on the total resources in the different lakes; investment into eggs thus dictated the share remaining for growth. The energy allocation to eggs per mass was higher in young than in old spawners and the egg size and the relative fecundity differed between them: Young females produced more and smaller eggs and larvae than old spawners. In contrast to earlier observations of salmonids, a shortage of maternal food resources did not increase offspring size and survival. Vendace females in sparse populations with ample resources and high growth produced larger eggs and larvae. Vendace accommodate strong population fluctuations by their high plasticity in growth and fecundity, which affect their offspring size and consequently their recruitment and productivity, and account for their persistence and resilience in the face of high fishing mortality.

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Section: Discussionmentioning

confidence: 99%

“…2003), and probably the growth rate of fish in their first growing season gives the size‐dependent baseline for the fecundity (Lubzens et al. 2010; Gregersen et al. 2011).…”

Section: Discussionmentioning

confidence: 99%

Phenotypic plasticity in growth and fecundity induced by strong population fluctuations affects reproductive traits of female fish

Urpanen

Keskinen

Huuskonen

et al. 2016

Ecology and Evolution

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“…Testosterone is produced by the theca cells surrounding the follicle under gonadotrophic stimulation and has positive feedback effects in the pituitary (Nagahama et al, 1995). Testosterone is the precursor of E 2 produced in the granulosa cells, which promotes ovarian growth through the stimulation of synthesis and secretion of vitellogenin and egg shell proteins in the liver (Lubzens et al, 2010;Nagahama et al, 1995;Senthilkumaran et al, 2004;Young et al, 2005). After oocyte growth, a shift in steroidogenesis leads to the production of 17,20b-dihydroxypregn-4-en-3-one (17,20b-P) also in the granulosa cells which induces the resumption of meiosis and final oocyte maturation (Nagahama, 1997;Senthilkumaran et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Tilapia male urinary pheromone stimulates female reproductive axis

Huertas

Almeida

Canário

et al. 2014

General and Comparative Endocrinology

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a b s t r a c tMozambique tilapia males congregate in leks where they establish dominance hierarchies and attract females to spawn in sandy pits. Dominant males store more urine than subordinates and the pattern of urination and the high sensitivity of females to male urine suggest chemical signalling via the urine. Here we show that pre-ovulated and post-spawn females when exposed to dominant male urine increased significantly, in less than 1 h, the release rate of the maturation-inducing steroid 17,20b-dihydroxypregn-4-en-3-one which is maintained elevated for at least 6 h. This indicates a pheromonal role for male urine in the synchronisation of spawning. Furthermore, we show that the lack of affinity of 17,20bP to sex steroid binding globulin explains, at least partly, its rapid release and lack of detection in the blood. Thus tilapia urine involvement in several communication processes confirms that cichlids have evolved a sophisticated chemical signalling system together with their complex visual, acoustic and behavioural displays.

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“…Studies suggest GH and IGF-I may also participate in the regulation of sexual maturation in salmonids (Björnsson 1997;Taylor et al 2008;Benedet et al 2010). Reproduction in salmonids is principally under photoperiod control, and the sex steroids-estradiol-17β (E2), testosterone (T), and 17α,20β-dihydroxy-4-pregnen-3-one (17,20βP)-are primary regulators of ovarian development (Bromage et al 1992;Bromage et al 2001;Lubzens et al 2010). Altering environmental conditions such as nutritional, photoperiod, and temperature cues are expected to impact reproductive and growth-axis hormone levels, which in turn should impact reproduction, growth, and fillet quality.…”

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confidence: 99%

Changes in Sex Steroids, Growth Hormone, and Insulin‐Like Growth Factor‐I during Ovarian Development in Rainbow Trout Cultured in a Water Recirculating System with Continuous Light

et al. 2015

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Female Rainbow Trout Oncorhynchus mykiss were cultured within a freshwater recirculating aquaculture system under 24‐h constant lighting in 13°C water and fed every 6 h to near satiation. An opaque roof allowed surface light intensity to vary between <200 and about 1,500 lx. During months 14–26 posthatch we examined changes in plasma concentrations of testosterone (T), estradiol‐17β (E2), the maturation inducing steroid (MIS) 17α,20β‐dihydroxy‐4‐pregnen‐3‐one (17,20βP), growth hormone (GH), and insulin‐like growth factor‐I (IGF‐I). Oocyte diameter was variable at the start of the study, most averaging <1 mm; diameter increased to above 3.2 mm in the final 2 months, with migrating germinal vesicles indicating they were postvitellogenic. Some ovaries exhibited atresia, and no fish ovulated, suggesting some reproductive dysfunction. Testosterone and E2 began increasing between months 16 and 18, and although T continued to increase throughout the study, E2 changed little after month 20. The MIS 17,20βP, remained near or below detection. Plasma GH remained relatively unchanged although values trended slightly higher during the final 4 months, GH being significantly greater at months 22, 24 and 26 than at month 16. Plasma IGF‐I was higher at the first time point, month 14 posthatch than at months 20, 24, 25, and 26. In summary, gradual changes in growth and fillet quality attributes during gonadal development were accompanied by gradual changes in hormone levels, but no clear changes in hormones were associated with rapid changes in product quality traits observed around months 24–26.

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Oogenesis in teleosts: How fish eggs are formed

Cited by 949 publications

References 257 publications

Phenotypic plasticity in growth and fecundity induced by strong population fluctuations affects reproductive traits of female fish

Phenotypic plasticity in growth and fecundity induced by strong population fluctuations affects reproductive traits of female fish

Tilapia male urinary pheromone stimulates female reproductive axis

Changes in Sex Steroids, Growth Hormone, and Insulin‐Like Growth Factor‐I during Ovarian Development in Rainbow Trout Cultured in a Water Recirculating System with Continuous Light

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