Consequences of temperature-induced sex reversal on hormones and brain in Nile tilapia (Oreochromis niloticus)

Dussenne, Mélanie; Gennotte, Vincent; Rougeot, Carole; Mélard, Charles; Cornil, Charlotte

doi:10.1016/j.yhbeh.2020.104728

Cited by 17 publications

(9 citation statements)

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“…In addition, Sry has been identified to bind directly to the promoter of MaoA and mediate the expression of this gene involved in aggressive behaviors (Wu et al, 2009). These results also highlight the need to consider naturally occurring sex reversal with alternative phenotypes, as observed in the pygmy mouse, in the bearded dragon (Castelli et al, 2021;Li et al, 2016) or in the Nile tilapia (Dussenne et al, 2020;Gennotte et al, 2017), to better understand the large spectrum of behaviors under the direct influence of genetic factors and as such, to challenge the classical view of steroid hormone predominance in the induction of sex differences in nongonadal organs and behavior.…”

Section: Resultsmentioning

confidence: 94%

Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal

Veyrunes,

Perez,

Heitzmann

et al. 2023

J Exp Zool Pt A

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In mammals, most sex differences in phenotype are controlled by gonadal hormones, but recent work on transgenic mice has shown that sex chromosomes can have a direct influence on sex‐specific behaviors. In this study, we take advantage of the naturally occurring sex reversal in a mouse species, Mus minutoides, to investigate for the first time the relationship between sex chromosomes, hormones, and behaviors in a wild species. In this model, a feminizing variant of the X chromosome, named X*, produces three types of females with different sex chromosome complements (XX, XX*, and X*Y), associated with alternative behavioral phenotypes, while all males are XY. We thus compared the levels of three major circulating steroid hormones (testosterone, corticosterone, and estradiol) in the four sex genotypes to disentangle the influence of sex chromosomes and sex hormones on behavior. First, we did not find any difference in testosterone levels in the three female genotypes, although X*Y females are notoriously more aggressive. Second, in agreement with their lower anxiety‐related behaviors, X*Y females and XY males display lower baseline corticosterone concentration than XX and XX* females. Instead of a direct hormonal influence, this result rather suggests that sex chromosomes may have an impact on the baseline corticosterone level, which in turn may influence behaviors. Third, estradiol concentrations do not explain the enhanced reproductive performance and maternal care behavior of the X*Y females compared to the XX and XX* females. Overall, this study highlights that most of the behaviors varying along with sex chromosome complement of this species are more likely driven by genetic factors rather than steroid hormone concentrations.

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Section: Resultsmentioning

confidence: 94%

Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal

Veyrunes,

Perez,

Heitzmann

et al. 2023

J Exp Zool Pt A

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“…It was shown in 1993 that O. niloticus grew 60% faster than the other tilapias (Canonico et al, 2005). Besides, they have important characteristics to be selected as valuable aquaculture products, including the relationship between extreme environment conditions and sex-differences (Hekimoğlu et al, 2019;Dussenne et al, 2020), as a biomarker for disease control (Huang et al, 2018;Chen et al, 2019;Yin et al, 2018;Wu et al, 2019), and for evaluating the effects of environmental pollutants (Yıldırım et al, 2006;Benli & Ozkul, 2010;Beryl et al, 2019;Ibrahim, 2020). Hence, the Genetic Improvement of Farmed Tilapia (GIFT) program was established and GIFT has invested many types of research and projects to improve the farming performance of tilapias, especially in Asia (Dey et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Notes on the Distribution of the Genus Oreochromis in the East Mediterranean Region of Turkey

Arslan¹,

İnnal²,

Özeren³

2021

Commagene Journal of Biology

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Tilapias are freshwater species which are the common name of three genera of cichlids, Oreochromis, Sarotherodon, and Coptodon. Many of the species belonged to these genera have been used for aquaculture products. Although their main native distribution areas are tropical and subtropical regions, they have spread to other areas due to their high invasive characteristics. This study was aimed to investigate the distribution of genus Oreochromis in the East Mediterranean Region of Turkey. The study was conducted at 18 stations located in Adana and Mersin from 2014 to 2017. The introduction of the species in these systems was mainly recorded weed control, transfers of fisherman, and escape from aquaculture facilities. However, the distribution of genus Oreochromis in Turkey and their effects on the aquatic ecosystems are unknown. The results showed that the species of genus Oreochromis were easily adapted the different conditions such as various flow rates, salinity, and temperature.

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“…Besides, dietary and nutritional management strategies could be another promising option to ameliorate thermal stress in fish. For example, the synthetic luteinizing hormone‐releasing hormone has been found to improve reproductive performance and mitigate the inhibitory effects of elevated temperature in both sexes of S. salar (H. R. King & Pankhurst, 2004a, 2004b), O. niloticus (Dussenne, Gennotte, Rougeot, Mélard, & Cornil, 2020), and freshwater eels, Anguilla spp. (Burgerhout, Lokman, van den Thillart, & Dirks, 2019).…”

Section: Mitigation Measures For Fish During Extreme Temperature Eventsmentioning

confidence: 99%

Responses of aquaculture fish to climate change‐induced extreme temperatures: A review

Islam

Kunzmann

Slater

2021

J World Aquaculture Soc

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Climate change‐induced extreme temperature events are becoming more intense and frequent. For fish, temperature is the master abiotic factor that controls and limits fish development and physiology at all stages of aquaculture. Major physiological constraints at the individual level underpin changes in fish growth, hemato‐physiology, metabolism, immune and molecular stress responses to extreme temperature events. Extreme temperature impacts on fish vary among and within the diverse species depending on stress magnitude and associated factors. This review synthesizes the impacts of climate change‐induced extreme temperature events on neuroendocrine, oxidative, metabolic, osmotic, molecular, hemato‐biochemical, and immune responses in fish related to aquaculture. Besides, overall aspects of extreme temperature impacts on fish growth and reproduction are also discussed. Possible mitigation measures to maintain the fish's physiological fitness during extreme temperature events are also addressed. However, studies on the interactive effects of extreme temperature events with other associated environmental stressors are needed across a broader range of species to gain a better understanding of fish response and aquaculture performance during extreme temperature events. Moreover, for fish, studies on alternative species, development of stress‐tolerant strains, and the possibilities of nutritional mitigation measures as a potential option to combat extreme temperature stress are promising and should be pursued in future studies.

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Consequences of temperature-induced sex reversal on hormones and brain in Nile tilapia (Oreochromis niloticus)

Cited by 17 publications

References 100 publications

Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal

Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal

Notes on the Distribution of the Genus Oreochromis in the East Mediterranean Region of Turkey

Responses of aquaculture fish to climate change‐induced extreme temperatures: A review

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