Thermosensitivity of the sex differentiation process in the African catfish, Clarias gariepinus: Determination of the thermosensitive period

Santi, Saïdou; Gennotte, Vincent; Toguyéni, Aboubacar; Mélard, Charles; Antoine, Nadine; Rougeot, Carole

doi:10.1016/j.aquaculture.2016.01.009

Cited by 27 publications

(39 citation statements)

References 30 publications

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“…Ten full‐sib progenies were obtained by artificial reproduction from domesticated African catfish breeders following a method previously described (Santi et al., ). Two dph larvae were transferred into 50‐L aquariums and continuums at an initial stocking density of 8 larvae L −1 .…”

Section: Methodsmentioning

confidence: 99%

“…African catfish Clarias gariepinus has a putative XX/XY genetic sex determination system (Viveiros et al., ) that can be overridden by high temperature (Santi et al., ). In this species, the thermosensitive period of sex differentiation extends from 0 to 23 days posthatching (dph) with a maximal sensitivity from 6 to 8 dph.…”

Section: Introductionmentioning

confidence: 99%

“…In this species, the thermosensitive period of sex differentiation extends from 0 to 23 days posthatching (dph) with a maximal sensitivity from 6 to 8 dph. High temperature treatment (36°C) applied during this 3‐day interval frequently resulted in 90–100% of males in progenies (Santi et al., ). These results were obtained under controlled laboratory conditions and information on the existence and the potential adaptive advantage of a temperature effect (interaction between genotype and temperature) on the sex differentiation process under natural conditions is lacking.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Preference and Sex Differentiation in African Catfish, Clarias gariepinus

et al. 2017

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The African catfish Clarias gariepinus has a genetic sex determination system in which high temperature induces masculinization. The thermosensitive period for sex differentiation is short and occurs very early (from 6 to 8 days posthatching [dph]). As young juveniles can encounter high masculinizing temperature (36.5°C) in African water points, we aimed to determine the thermal preference of sexually undifferentiated juveniles and investigate if they spontaneously move toward high masculinizing temperature. Experiments were carried out in an environmental continuum (28-28-28°C and 28-32-36.5°C) made up of three 50-L aquariums connected together. Four hundred larvae from 10 different full-sib progenies were reared successively from 2 to 14 dph in these facilities. Before and after thermal treatments, fish were reared at 28°C until sex ratio determination at 70 dph. In the control continuum, fish were nearly equally distributed in the three compartments. Conversely, in the thermal continuum, compartment occupation significantly differed with progeny and period. During the highly thermosensitive period, two of five progenies significantly preferred (54.7% and 39.8% occupation) the 36.5°C compartment. All tested progenies reared in thermal continuum and separated 36.5°C aquarium showed a skewed sex ratio toward the male phenotype (78-100%). Nevertheless, no correlation was found between 36.5°C compartment occupation and sex ratio in thermal continuum groups. As masculinization temperature could be encountered in African water points during the spawning season, we discussed the adaptive advantage for the African catfish to display a sex differentiation process controlled by a temperature effect.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature Preference and Sex Differentiation in African Catfish, Clarias gariepinus

et al. 2017

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“…The patterns are often not very strong [see, for example, the Supplementary Table S1 of Ospina‐Álvarez and Piferrer (2008)]. Moreover, there is often significant variation among families, as in D. rerio (Ribas et al ., 2017), C. gariepinus (Santi et al ., 2016) and O. niloticus (Baroiller & D'Cotta, 2001; Nivelle et al ., 2019), and there can be significant variation among experimental runs, as observed in European sea bass (Vandeputte & Piferrer, 2018). Some of this variation could, however, be due to sex‐specific mortality at very early stages (see discussion below).…”

Section: Types Of Temperature Effects On Sex Determinationmentioning

confidence: 99%

“…Since then, many studies have reported an effect of temperature on sex determination in various fish families, with different levels of domestication (Devlin & Nagahama, 2002; Ospina‐Álvarez & Piferrer, 2008). This includes species domesticated for many generations, like zebrafish Danio rerio (Hamilton 1822) (Uchida et al ., 2004), olive flounder Paralichthys olivaceus (Schmidt 1904) (Tabata, 1995), European sea bass Dicentrarchus labrax L. (Piferrer et al ., 2005), goldfish Carassius auratus L. (Goto‐Kazeto et al ., 2006), Nile tilapia Oreochromis niloticus L. (Baroiller et al ., 1995), pike silverside Chirostoma estor Jordan 1880 (Corona‐Herrera et al ., 2016) and African spiny catfish Clarias gariepinus (Burchell 1822) (Santi et al ., 2016). Similar results were obtained for the F1 progeny of wild populations of pejerrey Odontesthes bonariensis (Valenciennes 1835) (Strüssmann et al ., 1996), O. niloticus (Bezault et al ., 2007), spiny chromis damselfish Acanthochromis polyacanthus (Bleeker 1855) (Donelson & Munday, 2015), Poecilia melanogaster Günther 1866, 35 species of the genus Apistogramma (Römer & Beisenherz, 1996), and even the F2 of wild atipa Hoplosternum littorale (Hancock 1828) (Hostache et al ., 1995) and A. polyacanthus (Donelson & Munday, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of global warming on sex ratios in fishes

Geffroy

Wedekind

2020

Journal of Fish Biology

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In fishes, sex is determined by genetics, the environment or an interaction of both. Temperature is among the most important environmental factors that can affect sex determination. As a consequence, changes in temperature at critical developmental stages can induce biases in primary sex ratios in some species. However, early sex ratios can also be biased by sex‐specific tolerances to environmental stresses that may, in some cases, be amplified by changes in water temperature. Sex‐specific reactions to environmental stress have been observed at early larval stages before gonad formation starts. It is therefore necessary to distinguish between temperature effects on sex determination, generally acting through the stress axis or epigenetic mechanisms, and temperature effects on sex‐specific mortality. Both are likely to affect sex ratios and hence population dynamics. Moreover, in cases where temperature effects on sex determination lead to genotype–phenotype mismatches, long‐term effects on population dynamics are possible, for example temperature‐induced masculinization potentially leading to the loss of Y chromosomes or feminization to male‐biased operational sex ratios in future generations. To date, most studies under controlled conditions conclude that if temperature affects sex ratios, elevated temperatures mostly lead to a male bias. The few studies that have been performed on wild populations seem to confirm this general trend. Recent findings suggest that transgenerational plasticity could mitigate the effects of warming on sex ratios in some populations.

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Effects of temperature on sexual development in steelhead, Oncorhynchus mykiss

et al. 2021

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We evaluated how genotype (stock source, parental line, chromosomal sex) and temperature interact to influence gonad development and phenotypic sex of Oncorhynchus mykiss. Embryos were generated from single pair matings of natural-origin and first-generation hatchery-origin O. mykiss held at ambient or elevated (5°C above ambient) water temperature. Exposure to elevated temperature lasted from fertilization until the onset of exogenous feeding, after which all experimental groups were maintained at ambient temperature. Sexual phenotype was determined by histology and sexual genotype by the OmyY1 marker. There was 99% concordance among fish sexed both phenotypically and genotypically, demonstrating that experimental factors, including elevated rearing temperatures, did not result in sex change. Approximately 10% of the histologically examined fish showed no evidence of gonad development beyond the indifferent stage. Most of these fish were from hatchery family lines.

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Thermosensitivity of the sex differentiation process in the African catfish, Clarias gariepinus: Determination of the thermosensitive period

Cited by 27 publications

References 30 publications

Temperature Preference and Sex Differentiation in African Catfish, Clarias gariepinus

Temperature Preference and Sex Differentiation in African Catfish, Clarias gariepinus

Effects of global warming on sex ratios in fishes

Effects of temperature on sexual development in steelhead, Oncorhynchus mykiss

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