Influence of Environmental Temperature on Sex-Ratios in the Tidewater Silverside, Menidia peninsulae (Pisces: Atherinidae)

Middaugh, Douglas P.; Hemmer, Michael J.

doi:10.2307/1445559

Cited by 43 publications

(32 citation statements)

References 10 publications

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“…It has been suggested to occur in species of silversides of the genera Menidia and Odontesthes (Conover & Fleisher, 1986; Middaugh & Hemmer, 1987; Strüssmann et al., 2010) based on the observation of biased sex ratios, but a direct proof is not yet available. The discovery of the Y‐linked amhy gene in the pejerrey, an atherinopsid fish from South America, has made possible to screen for sex reversals in wild populations of this species, by distinguishing genotypic females from males and correlating them with gonadal sex (Yamamoto et al., 2014).…”

Section: Discussionmentioning

confidence: 99%

Demonstration of viability and fertility and development of a molecular tool to identify YY supermales in a fish with both genotypic and environmental sex determination

Tashiro

Zhang

Kakuta

et al. 2018

Ecology and Evolution

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The pejerrey possesses a genotypic sex determination system driven by the amhy gene and yet shows marked temperature‐dependent sex determination. Sex‐reversed XY females have been found in a naturally breeding population established in Lake Kasumigaura, Japan. These females could mate with normal XY males and generate YY “supermale” individuals that, if viable and fertile, would sire only genotypic male offspring. This study was conducted to verify the viability, gender, and fertility of YY pejerrey and to develop a molecular method for their identification. Production of YY fish was attempted by crossing a thermally sex‐reversed XY female and an XY male, and rearing the progeny until sexual maturation. To identify the presumable YY individuals, we first conducted a PCR analysis using amhy‐specific primers to screen only amhy‐positive (XY and YY) fish. This screening showed that 60.6% of the progeny was amhy‐positive, which suggested the presence of YY fish. We then conducted a second screening by qPCR in order to identify the individuals with two amhy copies in their genome. This screening revealed 13 individuals, all males, with values twice higher than the other 30 amhy‐positive fishes, suggesting they have a YY complement. This assumption as well as the viability, fertility, and “supermale” nature of these individuals was confirmed in progeny tests with XX females that yielded 100% amhy‐positive offspring. These results demonstrate that qPCR can obviate progeny test as a means to identify the genotypic sex and therefore may be useful for the survey of all three possible genotypes in wild populations.

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Section: Discussionmentioning

confidence: 99%

Demonstration of viability and fertility and development of a molecular tool to identify YY supermales in a fish with both genotypic and environmental sex determination

Tashiro

Zhang

Kakuta

et al. 2018

Ecology and Evolution

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“…Evidence in support of skewed primary sex ratios has been reported for taxa as diverse as insects (King 1989) and birds (Howe 1977). Skewed primary sex ratios are especially possible in animals with environmental sex determination such as some turtles and a variety of other poikilotherms ( Bull and Vogt 1979, Bull 1980, Morreale et al 1984, Ferguson and Joanen 1982, Vogt and Bull 1982a, Conover 1984, Middaugh and Hemmer 1987, Deeming and Ferguson 1989, Lang et al 1989). The second factor, differential mortality of the sexes, has also been suggested as a cause of skewed sex ratios by Selander (1965), Howe (1977), Hurly (1987) and Elmqvist et al (1988).…”

Section: Introductionmentioning

confidence: 99%

Age at Maturity Influences Adult Sex Ratio in the Turtle Malaclemys terrapin

Lovich¹,

Gibbons²

1990

Oikos

113

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“…This phenomenon occurs over a broad range of environmentally relevant temperatures and appears to be not restricted to species from any phylogenetic group, lifestyle or habitat, although it is common and very marked among Atheriniformes [Strüssmann and Patiño, 1995;Strüss-mann and Nakamura, 2002]. In this taxon, TSD is indeed the main determinant of the sex ratios in natural populations [Conover and Kynard, 1981;Middaugh and Hemmer, 1987;Strüssmann et al, 2003] and supposedly confers an adaptive advantage to some species (e.g. the Atlantic silverside, Menidia menidia ) [Conover, 1984].…”

mentioning

confidence: 99%

Temperature-Dependent Sex Determination in Hd-rR Medaka <i>Oryzias latipes:</i> Gender Sensitivity, Thermal Threshold, Critical Period, and <i>DMRT1</i> Expression Profile

Hattori

Gould

Fujioka

et al. 2007

Sex Dev

107

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The developmental time and thermal threshold for temperature-dependent sex determination (TSD), gender differences in temperature sensitivity, the fertility of thermally sex reversed fish, and the effect of temperature on the expression of two major sex determination/differentiation genes (DMY/DMRT1bY and DMRT1) were examined in the Hd-rR strain of medaka, Oryzias latipes. Fertilized eggs were exposed from either shortly after fertilization (8–16 cells; embryonic stages 5–6) or from middle embryogenesis (heart development stage; stage 36) until hatching to temperatures ranging from 17°C to 34°C. Secondary sexual characteristics, gonadal histology, progeny testing, sex-linked body coloration and gene expression were used to determine phenotypic and genotypic sex. Sex determination was unaffected by low or high temperatures in genotypic (XY) males. In contrast, genotypic (XX) females treated from stages 5–6 showed increasing rates of sex reversal into phenotypic males at temperatures above 27°C up to 100% at 34°C. Thermal manipulation of sex was ineffective after stage 36, indicating that gonadal fate in medaka is determined considerably earlier than histological differentiation (stage 39). High temperature induced DMRT1 expression in genotypic females, which was observed already from stage 36. Sex-reversed males had histologically normal testes, were capable of sexual courtship and, with the exception of fish from 34°C, sired viable progeny when mating with fertile females. These results clarify the pattern of TSD in medaka and provide important clues to understand the mechanism of sex determination in this species. They also suggest that a brief exposure to high temperature early in life could impair the fertility of medaka as adults.

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Influence of Environmental Temperature on Sex-Ratios in the Tidewater Silverside, Menidia peninsulae (Pisces: Atherinidae)

Cited by 43 publications

References 10 publications

Demonstration of viability and fertility and development of a molecular tool to identify YY supermales in a fish with both genotypic and environmental sex determination

Demonstration of viability and fertility and development of a molecular tool to identify YY supermales in a fish with both genotypic and environmental sex determination

Age at Maturity Influences Adult Sex Ratio in the Turtle Malaclemys terrapin

Temperature-Dependent Sex Determination in Hd-rR Medaka <i>Oryzias latipes:</i> Gender Sensitivity, Thermal Threshold, Critical Period, and <i>DMRT1</i> Expression Profile

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