Potential use of otolith microchemistry for field studies of temperature-dependent sex determination and gonadal degeneration in fish

Strüssmann, Carlos Augusto; Oikawa, Tomohiro; Otake, Tsuguo; Kasuga, Seiichi

doi:10.1023/b:fish.0000030498.33279.69

Cited by 10 publications

(10 citation statements)

References 3 publications

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“…The potential importance of water temperature‐induced reproductive dysfunctions must not be underestimated as fishes constitute by far the largest harvestable natural food resource available to humanity and even minor impairment of their ability to self‐propagate could have profound socio‐economic consequences. Thus, detailed knowledge on the mechanisms underlying these dysfunctions, the ability to monitor their occurrence in natural populations (Strüssmann et al , 2003) and improved knowledge of the capacity for and constraints on adaptation to climate change through Darwinian processes may be crucial for the management of valuable fish resources.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, it is a foregone conclusion that even minor changes in the usual thermal profiles during the spawning season or the restriction of spawning activity to a short period could skew the sex ratios of wild populations. The sex ratios of young‐of‐the‐year O. bonariensis have been periodically examined in an invasive population in Japan and highly variable, skewed sex ratios including up to 10 and 80% females from year to year were recorded during a 10 year period (Oikawa, 2001; Strüssmann et al , 2003). The environment examined, Kasumigaura Lake, is a large ( c. 220 km 2 ) but shallow (<7 m deep) lake with marked seasonal variation in water temperature ranging from c. 5° C in winter to 30° C in summer.…”

Section: Temperature Effects On Sex Determinationmentioning

confidence: 99%

“…Interestingly, the years that produced abundant males and females coincided with those having atypically high and low temperatures during the spawning season of O. bonariensis , respectively. It is also alarming that two consecutive years with biased sex ratios for the same sex were followed by drastic decreases in juvenile abundance regardless of the size of the population in the previous year (Oikawa, 2001; Strüssmann et al , 2003). Most water bodies inhabited by O. bonariensis in its native distribution range, the Argentine Pampa, have limnological characteristics similar to Kasumigaura Lake (Boltovskoy et al , 1990; Kopprio et al , 2010).…”

Section: Temperature Effects On Sex Determinationmentioning

confidence: 99%

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Implications of climate change for the reproductive capacity and survival of New World silversides (family Atherinopsidae)

Strüssmann¹,

Conover²,

Somoza³

et al. 2010

Journal of Fish Biology

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The New World silversides (family Atherinopsidae) are found in marine, estuarine and inland waters of North, Central and South America, where they are ecologically important as forage fishes and sometimes economically important for commercial and recreational fisheries. This report reviews the knowledge of the reproductive attributes of temperate and subtropical atherinopsids in relation to temperature and discusses the potential effects of climate change on their reproduction and adaptive responses. Their reproductive cycles are primarily entrained by photoperiod with high temperature acting as a limiting factor. They are generally multiple spawners which release successive batches of eggs in spring, but some species can spawn also in autumn and even summer when temperatures do not increase excessively. The decoupling of temperature patterns and photoperiod with further global warming and associated asymmetric thermal fluctuations could lead to spawning at times or temperatures that are unsuitable for larval development and growth. Many members of this family show temperature-dependent sex determination (TSD), where the phenotypic sex of an individual is determined partly or wholly by the temperature experienced during gonadal sex differentiation, and high-temperature induced germ cell degeneration and decreased fertility. The predicted short-term reproductive responses of atherinopsids to climate change therefore include acceleration, shortening or overall disruption of spawning activity, and also more subtle, but nonetheless equally population-threatening, dysfunctions such as highly skewed sex ratios and partial or total loss of fertility. In the case of species with TSD, asymmetric thermal fluctuations could also cause larvae to encounter temperatures lower than normal during early development and be feminized. Such dysfunctions have been documented already in natural populations but are confined so far to landlocked, inland water habitats, perhaps because they impose more severe thermal fluctuations and limitations to migration and dispersal. The severity and recurrence of these dysfunctions with further climate change will depend both on the magnitude, speed and pattern of change and on how much (or how fast) physiological and behavioural traits can evolve to match the new conditions imposed by the climate, which is largely unknown. In this regard, compelling evidence is shown that numerous traits, including the sex determination system, are capable of rapid evolution and could mitigate the negative effects of temperature increases on population viability in atherinopsids.

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Section: Discussionmentioning

confidence: 99%

Section: Temperature Effects On Sex Determinationmentioning

confidence: 99%

Section: Temperature Effects On Sex Determinationmentioning

confidence: 99%

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Implications of climate change for the reproductive capacity and survival of New World silversides (family Atherinopsidae)

Strüssmann¹,

Conover²,

Somoza³

et al. 2010

Journal of Fish Biology

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“…Under this hypothesis, temperature masculinization could affect the number of germ cells either through apoptosis, i.e. in pejerrey and zebrafish [Uchida et al, 2002;Strüssmann et al, 2003] or through the inhibition of germ cell proliferation.…”

Section: Is Early Germ Cell Number a Critical Threshold For Deciding mentioning

confidence: 99%

Environmental Effects on Fish Sex Determination and Differentiation

Baroiller

D'Cotta

Saillant

2009

Sex Dev

271

229

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Environmental factors affect the sex ratio of many gonochoristic fish species. They can either determine sex or influence sex differentiation. Temperature is the most common environmental cue affecting sex but density, pH and hypoxia have also been shown to influence the sex ratio of fish species from very divergent orders. Differential growth or developmental rate is suggested to influence sex differentiation in sea bass. Studies in most fish species used domestic strains reared under controlled conditions. In tilapia and sea bass, domestic stocks and field-collected populations showed similar patterns of thermosensitivity under controlled conditions. Genetic variability of thermosensitivity is seen between populations but also between families within the same population. Furthermore, in the Nile tilapia progeny testing of wild male breeders has strongly suggested the existence of XX males in 2 different natural populations. Tilapia and Atlantic silverside studies have shown that temperature sensitivity is a heritable trait which can respond to directional (tilapia) or frequency dependent selection. In tilapia, transitional forms within a genetic sex determination (GSD) and environmental sex determination (ESD) continuum seem to exist. Temperature regulates the expression of the ovarian-aromatase cyp19a1 which is consistently inhibited in temperature masculinized gonads. Foxl2 issuppressed before cyp19a1. Recent in vitro studies have shown that foxl2 activates cyp19a1, suggesting that temperature acts directly on foxl2 or further upstream. Dmrt1 up-regulation is correlated with temperature-induced male phenotypes. Temperature through apoptosis or germ cell proliferation could be a critical threshold for male or female sex differentiation.

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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].…”

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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

Self Cite

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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Potential use of otolith microchemistry for field studies of temperature-dependent sex determination and gonadal degeneration in fish

Cited by 10 publications

References 3 publications

Implications of climate change for the reproductive capacity and survival of New World silversides (family Atherinopsidae)

Implications of climate change for the reproductive capacity and survival of New World silversides (family Atherinopsidae)

Environmental Effects on Fish Sex Determination and Differentiation

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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