Production of monosex male black crappie, Pomoxis nigromaculatus, populations by multiple androgen immersion

Arslan, Tülin; Phelps, Ronald P.

doi:10.1016/j.aquaculture.2003.12.007

Cited by 44 publications

(36 citation statements)

References 34 publications

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“…Chem. 29,2010in FHM, medaka, zebrafish, channel catfish, and black crappie exposed to Tb or its parent compound, trenbolone acetate [6,9,[24][25][26]. Although masculinization appears to be an indicator of androgen exposure, it did not coincide with adverse effects on reproduction.…”

Section: Discussionmentioning

confidence: 90%

Exposure of three generations of the estuarine sheepshead minnow (Cyprinodon variegatus) to the androgen, 17β‐trenbolone: Effects on survival, development, and reproduction

Cripe

Hemmer

Raimondo

et al. 2010

Enviro Toxic and Chemistry

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Estimating long-term effects of endocrine-disrupting chemicals on a species is important to assessing the overall risk to the populations. The present study reports the results of a 42-week exposure of estuarine sheepshead minnows (Cyprinodon variegatus) to the androgen, 17beta-trenbolone (Tb) conducted to determine if partial-(F0) or single-generation (F1) fish exposures identify multigenerational (F0-F3) effects of androgens on fish. Adult F0 fish were exposed to 0.007, 0.027, 0.13, 0.87,and 4.1 microg Tb/L, the F1 generation to < or =0.87 microg Tb/L, the F2 fish to < or =0.13 microg Tb/L, and the F3 fish to < or =0.027 microg Tb/L. The highest concentrations with reproducing populations at the end of the F0, F1, and F2 generations were 4.1, 0.87, and 0.027 microg Tb/L, respectively. Reproduction in the F0, F1, and F2 generations was significantly reduced at 0.87, 0.027, and 0.027 microg Tb/L, respectively. Fish were significantly masculinized in the F1 generation exposed to 0.13 microg Tb/L or greater. Female plasma vitellogenin was significantly reduced in F0 fish exposed to > or =0.87 microg Tb/L. Gonadosomatic indices of the F0 and F1 generations were significantly increased at 0.87 and 0.13 microg Tb/L in the F0 and F1 generation, respectively, and were accompanied by ovarian histological changes. Reproduction was the most consistently sensitive measure of androgen effects and, after a life-cycle exposure, the daily reproductive rate predicted concentrations affecting successive generations. The present study provides evidence that a multiple generation exposure of fish to some endocrine-disrupting chemicals can result in developmental and reproductive changes that have a much greater impact on the success of a species than was indicated from shorter term exposures.

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Section: Discussionmentioning

confidence: 90%

Exposure of three generations of the estuarine sheepshead minnow (Cyprinodon variegatus) to the androgen, 17β‐trenbolone: Effects on survival, development, and reproduction

Cripe

Hemmer

Raimondo

et al. 2010

Enviro Toxic and Chemistry

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“…Some of the chemicals, which have androgenic or estrogenic functions, are reported to alter gonadal sex in fish from female to male or vice versa if administered during the period of gonadal sex differentiation [Papoulias et al, 2000;Arslan and Phelps, 2004;Hirai et al, 2006] or even at maturity [Chang et al, 1995;Yeh et al, 2003]. Other than the direct androgenic or estrogenic effects, there are chemicals which are capable of disrupting the enzymatic pathway of natural androgen-estrogen balance in fish [McAllister and Kime, 2003;Hallgren et al, 2006;Villeneuve et al, 2006].…”

mentioning

confidence: 99%

Fugu <i>(Takifugu rubripes)</i> Sexual Differentiation: CYP19 Regulation and Aromatase Inhibitor Induced Testicular Development

Rashid¹,

Kitano²,

Lee³

et al. 2007

Sex Dev

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In order to assess the involvement of aromatase CYP19 isoforms and endogenous sex steroids in gonadal sex differentiation and development of the Japanese fugu (Takifugu rubripes), an aromatase inhibitor (AI, fadrozole) was administered to developing fishes from the ‘first feeding’ till the 100th day after hatching. It was observed that ovarian cavity formation was inhibited by fadrozole at doses of 500 and 1000 µg/g diet, which was followed by testicular differentiation in all treated fugu. In the non-treated fugu, CYP19A was predominantly expressed in the ovary and CYP19B in the brain (in both sexes), although both were expressed interchangeably at low levels. An exceptionally high expression of CYP19B was also evident in testis throughout the study period. Both forms of CYP19 mRNA showed low levels of expression in brain and gonad with no significant differences between the two AI treatments. AI treatment inhibited CYP19A mRNA in trunk during the crucial period of ovarian cavity formation and CYP19B in gonad and brain by the end of gonadal sex differentiation. An elevation of testosterone and 11-ketotestosterone was observed which can be associated with the down-regulation of the circulating 17β-estradiol production during the AI treatment period. After stopping AI treatment, both circulating estrogen and androgen were normalized. The current results suggest that suppression of CYP19A before and during morphological sex differentiation inhibits ovarian cavity formation in fugu. Furthermore, non-detectable limits of 17β-estradiol and high testosterone levels by the end of the gonadal differentiation period can be ascribed to inhibition of CYP19B, suggesting that conversion of 17β-estradiol from testosterone is plausibly regulated by CYP19B, and that this factor (CYP19B) may play an important role in AI-induced testicular development after gonadal sex differentiation through regulation of the testosterone–17β-estradiol balance in fugu.

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“…Gomelsky et al (2002) achieved 95% masculinization by oral administration of MT. Finally, Arslan and Phelps (2004) accomplished 100% masculinization by immersing fry in TBA and MT solutions. One objective of this present investigation was to further develop the masculinization technique in black crappie with special attention on identifying proper size and age as critical factors to the initiation of androgen treatment.…”

Section: Introductionmentioning

confidence: 99%

Progress in Studies on Hormonal Sex Reversal and Genetic Sex Control in Black Crappie

Cuevas‐Uribe

Gomelsky

Mims

et al. 2009

Reviews in Fisheries Science

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Sex control can solve the problem of stunted black crappie populations in small impoundments. The main objectives of the present study were (1) to identify sex-reversed males of black crappie from a previously obtained androgen-treated group using test crosses, and (2) to develop broodstock of sex-reversed males by masculinization of fish from those crosses. An additional objective of the study was to try to identify sex-specific RAPD markers, which might be used for identification of sex-reversed males. The progenies resulting from test crosses were divided into two groups: Group I (control) fish were raised without hormonal treatment, while Group II fish were subjected to androgen (MT) treatment. Seven progenies were obtained from the cross of preliminary androgen-treated males with normal females. Six of seven progenies had sex ratio in Groups I close to 1:1, and one progeny consisted of females only. This shows that only one male, which generated this progeny, was a sex-reversed homogametic fish (XX) while the other males were heterogametic normal (XY) fish. In Group II the androgen 17α-methyltestosterone (MT) was orally administered to crappie with an artificial diet (30 mg/kg) for 40 days beginning 35 days post hatching; androgen-treated groups consisted of 95-100% males. Sex-specific random-amplified polymorphic DNA markers were not identified in black crappie.

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Production of monosex male black crappie, Pomoxis nigromaculatus, populations by multiple androgen immersion

Cited by 44 publications

References 34 publications

Exposure of three generations of the estuarine sheepshead minnow (Cyprinodon variegatus) to the androgen, 17β‐trenbolone: Effects on survival, development, and reproduction

Exposure of three generations of the estuarine sheepshead minnow (Cyprinodon variegatus) to the androgen, 17β‐trenbolone: Effects on survival, development, and reproduction

Fugu <i>(Takifugu rubripes)</i> Sexual Differentiation: CYP19 Regulation and Aromatase Inhibitor Induced Testicular Development

Progress in Studies on Hormonal Sex Reversal and Genetic Sex Control in Black Crappie

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