TITLE

Rapid growth and out-crossing promote female development in zebrafish ( Danio rerio)

AUTHOR(S)
Lawrence, Christian; Ebersole, John; Kesseli, Richard
PUB. DATE
November 2007
SOURCE
Environmental Biology of Fishes;Nov2007, Vol. 81 Issue 2, p239
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Sex determination in fishes is often enigmatic, a situation that is often made even more complex by the fact that the process of sexual differentiation in many species may be influenced by environmental conditions. This situation is typified in zebrafish, a popular model organism. Despite the vast array of information available for the species, the genetic controls of sex are unknown. Further, environmental parameters, such as rearing densities, seem to exert an influence on the sex ratios of captive stocks. In an effort to dissect the genetic and environmental controls underlying the expression of sex in this species, we manipulated growth of pure-bred and out-crossed zebrafish by varying their food supply during development. Faster-growing zebrafish were more likely to be female than siblings that were fed less, and out-crossed broods had higher proportions of females than broods from pure-bred crosses. The dependence of sex ratio on feeding rate is readily understood in terms of adaptive sex allocation: zebrafish life history seems to confer the greater pay-off for large size on females. A similar male/female difference in the pay-off for hybrid vigor could similarly account for the female bias of out-crossed broods—and it could be a manifestation of Haldane’s rule.
ACCESSION #
27767994

 

Related Articles

  • Ontogeny of sexual differentiation in different strains of zebrafish (Danio rerio). Maack, G.; Segner, H.; Tyler, C.R. // Fish Physiology & Biochemistry;Mar2003, Vol. 28 Issue 1-4, p125 

    The zebrafish (ZF) undergoes juvenile hermaphroditism, where in all fish, the gonad first develops as an ovary-like structure, before the sex is fixed and the gonad then differentiates into either a testis or an ovary. Sexual differentiation is being adopted as an endpoint for assessing...

  • Growth rate during early life affects sexual differentiation in roach ( Rutilus rutilus). Paull, Gregory C.; Filby, Amy L.; Tyler, Charles R. // Environmental Biology of Fishes;Aug2009, Vol. 85 Issue 4, p277 

    Many environmental factors have been shown to influence sex differentiation in fish, resulting in sex-biased populations, but the effects of growth rate have received limited attention. We conducted a controlled laboratory experiment in which growth rate and population density were manipulated...

  • Expression profiles for six zebrafish genes during gonadal sex differentiation. Jørgensen, Anne; Morthorst, Jane E.; Andersen, Ole; Rasmussen, Lene J.; Bjerregaard, Poul // Reproductive Biology & Endocrinology;2008, Vol. 6, Special section p1 

    Background: The mechanism of sex determination in zebrafish is largely unknown and neither sex chromosomes nor a sex-determining gene have been identified. This indicates that sex determination in zebrafish is mediated by genetic signals from autosomal genes. The aim of this study was to...

  • Influence of Propylparaben on Vitellogenesis and Sex Ratio in Juvenile Zebrafish (Danio rerio). Mikula, Přemysl; Kružíková, Kamila; Dobšíková, Radka; Haruštiaková, Danka; Svobodová, Zdeňka // Acta Veterinaria Brno;Jun2009, Vol. 78 Issue 2, p319 

    The aim of the study was to evaluate the xeno-oestrogenic potential of propylparaben in vivo using zebrafish (Danio rerio). Experimental juvenile zebrafish (20 days post hatching) were fed a feed containing 500, 1000, or 2000 mg·kg-1 of propylparaben, fish in a positive control group were...

  • Using Zebrafish as a Model System for Studying the Transgenerational Effects of Dioxin. Baker, Tracie R.; Peterson, Richard E.; Heideman, Warren // Toxicological Sciences;Apr2014, Vol. 138 Issue 2, p403 

    2,3,7,8 Tetrachlorodibenzo-p-dioxin (TCDD) has been associated with many disease states in humans. A rising concern is that exposure early in life can lead to adult toxicity and toxicity in subsequent generations. Juvenile zebrafish exposed to TCDD (50 pg/ml in water; 1 h exposure) at 3 and 7...

  • Early Dioxin Exposure Causes Toxic Effects in Adult Zebrafish. Baker, Tracie R.; Peterson, Richard E.; Heideman, Warren // Toxicological Sciences;Sep2013, Vol. 135 Issue 1, p241 

    The acute effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure have been well documented in many vertebrate species. However, less is known about the consequences in adulthood from sublethal exposure during development. To address this, we exposed zebrafish to sublethal levels of TCDD...

  • Use of antagonists and morpholinos in loss-of-function analyses: estrogen receptor ESR2a mediates the effects of 17alpha-ethinylestradiol on primordial germ cell distribution in zebrafish. Jingying Hu; Shaoyang Sun; Meng Guo; Houyan Song // Reproductive Biology & Endocrinology;2014, Vol. 12 Issue 1, p1 

    Background Various chemicals released into the aquatic environment adversely affect the reproductive system of fish, particularly by changing gonad structure and function. 17alphaethinylestradiol (EE2) is a potent environmental estrogen that disrupts sexual differentiation and normal...

  • Retinoic Acid Metabolic Genes, Meiosis, and Gonadal Sex Differentiation in Zebrafish. Rodríguez-Marí, Adriana; Cañestro, Cristian; BreMiller, Ruth A.; Catchen, Julian M.; Yan, Yi-Lin; Postlethwait, John H. // PLoS ONE;Sep2013, Vol. 8 Issue 9, p1 

    To help understand the elusive mechanisms of zebrafish sex determination, we studied the genetic machinery regulating production and breakdown of retinoic acid (RA) during the onset of meiosis in gonadogenesis. Results uncovered unexpected mechanistic differences between zebrafish and mammals....

  • Evaluation of a 40 day Assay for Testing Endocrine Disrupters: Effects of an Anti-Estrogen and an Aromatase Inhibitor on Sex Ratio and Vitellogenin Concentrations in Juvenile Zebrafish ( Danio rerio). Andersen, L.; Kinnberg, K.; Holbech, H.; Korsgaard, B.; Bjerregaard, P. // Fish Physiology & Biochemistry;Sep2004, Vol. 30 Issue 3/4, p257 

    In the present study, the effects of the anti-estrogen ZM 189,156 and the aromatase inhibitor fadrozole were evaluated in a 40-day juvenile assay developed for screening of endocrine disrupting chemicals. Juvenile zebrafish were exposed from 20 to 60 days post hatch (dph) to ZM 189, 154 (100...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics