Seasonal changes and endocrine regulation of pejerrey (Odontesthes bonariensis) oogenesis in the wild

Elisio, Mariano; Chalde, Tomás; Miranda, Leandro Andrés

doi:10.1016/j.cbpa.2014.05.020

Cited by 44 publications

(44 citation statements)

References 51 publications

(77 reference statements)

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“…(4) Cholesterol is produced after the removal of three carbons. This important metabolite was significantly increased from stages III to IV, but not from stages IV to V. Accordingly, previous reports have indicated that cholesterol accumulates from stages III to IV, while steroids accumulate from stages IV to V2829. In summary, expression of the cholesterol synthesis pathway is increased during ovarian development.…”

Section: Discussionmentioning

confidence: 57%

Integrated application of transcriptomics and metabolomics yields insights into population-asynchronous ovary development in Coilia nasus

et al. 2016

Sci Rep

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Populations of Coilia nasus demonstrate asynchronous ovarian development, which severely restricts artificial breeding and large-scale cultivation. In this study, we used a combination of transcriptomic and metabolomic methods to identify the key signaling pathways and genes regulation affecting ovarian development. We identified 565 compounds and generated 47,049 unigenes from ovary tissue. Fifteen metabolites and 830 genes were significantly up-regulated, while 27 metabolites and 642 genes were significantly down-regulated from stage III to stage IV of ovary development. Meanwhile, 31 metabolites and 1,932 genes were significantly up-regulated, and four metabolites and 764 genes were down-regulated from stage IV to stage V. These differentially expressed genes and metabolites were enriched by MetScape. Forty-three and 50 signaling pathways had important functions from stage III–IV and from stage IV–V in the ovary, respectively. Among the above signaling pathways, 39 played important roles from ovarian stage III–V, including “squalene and cholesterol biosynthesis”, “steroid hormone biosynthesis”, and “arachidonate metabolism and prostaglandin formation” pathways which may thus have key roles in regulating asynchronous development. These results shed new light on our understanding of the mechanisms responsible for population-asynchronous development in fish.

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Section: Discussionmentioning

confidence: 57%

Integrated application of transcriptomics and metabolomics yields insights into population-asynchronous ovary development in Coilia nasus

et al. 2016

Sci Rep

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“…Four‐year‐old fish from the pejerrey broodstock reared at the IIB‐INTECH aquatic facilities were used. Two groups of 14 fish with 7 females (body mass: 536.1 ± 48.9 g) and 7 males (body mass: 400.1 ± 25.4 g) each were kept from May 2010 to April 2011 in 3,000 L recirculating aquaculture system with two full daily water (15 salinity) exchanges allowing temperature fluctuations similar to that registered in shallow lakes by Elisio et al (). Water temperature was recorded every hour with waterproof electronic data loggers (Thermochron ® iButton).…”

Section: Methodsmentioning

confidence: 99%

“…This fish inhabits shallow lakes, which are characterized by high thermal fluctuation and not having stable thermal stratification (Elisio, Vitale, & Miranda, ). The pejerrey is a multiple spawner releasing successive egg batches from late winter to late spring, and even during late summer and early autumn if the environmental conditions are permissive (Calvo & Morriconi, ; Elisio Chalde, & Miranda, , ). Both the start and the end of spawning periods are highly regulated by temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies were performed related to reproductive physiology of pejerrey in the wild (Elisio, Chalde, & Miranda, ; Elisio, Chalde, et al, ), and in captivity (Chalde, Gárriz, Sanches, & Miranda, ; Elisio, Chalde, & Miranda, ; Miranda, Strüssmann, Guilgur, Strobl‐Mazzulla, & Somoza, ; Miranda, Strüssmann, & Somoza, ; Somoza, Miranda, Guilgur, & Strobl‐Mazzulla, ) analysing the brain‐pituitary‐gonad axis function at molecular, endocrinological and histological level, providing valuable information for the management of broodstock. In this sense, several strategies have been performed for intensive‐breeding development in captivity for aquaculture production, manipulating temperature, photoperiod and hormonal treatments (Chalde, Fernández, Cussac, & Somoza, ; Miranda, Berasain, Velasco, Shirojo, & Somoza, ; Miranda, Cassará, & Somoza, ; Miranda & Somoza, ).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the quality of the gametes and sex steroid levels during spring and summer spawning events in pejerrey Odontesthes bonariensis reared under natural conditions of temperature and photoperiod

Chalde

Miranda

2020

Aquac Res

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Pejerrey Odontesthes bonariensis spawning period takes place during the end of winter and spring and, depending on temperature conditions, during late summer and autumn. Nevertheless, the occurrence and quality of the summer–autumn spawning period have not been well documented and are not considered for aquaculture production. In this context, this study aimed to characterize the reproductive activity of pejerrey reared in captivity under natural conditions of temperature and photoperiod throughout a year in order to summarize the spawning quality of the two spawning periods. The present results showed that pejerrey might spawn from late winter to the end of the spring with a peak in October (mid‐spring) and, also during summer and early autumn, interrupted by a period of 56 days without spawning activity in between. The extension of both spawning periods was almost equal (67 and 69 days). Nevertheless, higher relative fecundity and larger egg size were observed during the first spawning period, associated with higher levels of oestradiol measured in females demonstrating that it is better than the second spawning. The fertilization rate was not affected throughout the reproductive periods. These differences in the reproductive parameters are discussed in order to design specific strategies to increase seed production.

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“…Reproductive seasonality is regulated by multiple environmental factors and in many temperate species, photoperiod and water temperature are critical cues. Seasonal changes in circulating sex steroids and other hormones and multiple neurohormonal receptors occur in the brain (Zhang et al 2009a; Migaud et al 2012; Moussavi et al 2012; Forlano et al 2014), pituitary (Moussavi et al 2013; Nakane et al 2013), and gonad (Orlando et al 2007; Geraudie et al 2010; Elisio et al 2014), as a fish transitions from a reproductively quiescent to a reproductively active state through a process called recrudescence. Further, there are differences in neuroestrogen synthesis as glial cell aromatase is not only 1–2 orders of magnitude greater in fish brains compared to that in mammals, but also varies significantly with reproductive season (Aggarwal et al 2014; Pasmanik and Callard 1988).…”

Section: Introductionmentioning

confidence: 99%

Neuroendocrine disruption of organizational and activational hormone programming in poikilothermic vertebrates

Rosenfeld

Denslow

Orlando

et al. 2017

Journal of Toxicology and Environmental Health, Part B

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In vertebrates, sexual differentiation of the reproductive system and brain is tightly orchestrated by organizational and activational effects of endogenous hormones. In mammals and birds, the organizational period is typified by a surge of sex hormones during differentiation of specific neural circuits; whereas activational effects are dependent upon later increases in these same hormones at sexual maturation. Depending on the reproductive organ or brain region, initial programming events may be modulated by androgens or require conversion of androgens to estrogens. The prevailing notion based upon findings in mammalian models is that male brain is sculpted to undergo masculinization and defeminization. In absence of these responses, the female brain develops. While timing of organizational and activational events vary across taxa, there are shared features. Further, exposure of different animal models to environmental chemicals such as xenoestrogens such as bisphenol A- BPA and ethinylestradiol- EE2, gestagens, and thyroid hormone disruptors, broadly classified as neuroendocrine disrupting chemicals (NED), during these critical periods may result in similar alterations in brain structure, function, and consequently, behaviors. Organizational effects of neuroendocrine systems in mammals and birds appear to be permanent, whereas teleost fish neuroendocrine systems exhibit plasticity. While there are fewer NED studies in amphibians and reptiles, data suggest that NED disrupt normal organizational-activational effects of endogenous hormones, although it remains to be determined if these disturbances are reversible. The aim of this review is to examine how various environmental chemicals may interrupt normal organizational and activational events in poikilothermic vertebrates. By altering such processes, these chemicals may affect reproductive health of an animal and result in compromised populations and ecosystem-level effects.

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Seasonal changes and endocrine regulation of pejerrey (Odontesthes bonariensis) oogenesis in the wild

Cited by 44 publications

References 51 publications

Integrated application of transcriptomics and metabolomics yields insights into population-asynchronous ovary development in Coilia nasus

Integrated application of transcriptomics and metabolomics yields insights into population-asynchronous ovary development in Coilia nasus

Characterization of the quality of the gametes and sex steroid levels during spring and summer spawning events in pejerrey Odontesthes bonariensis reared under natural conditions of temperature and photoperiod

Neuroendocrine disruption of organizational and activational hormone programming in poikilothermic vertebrates

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