Life-History Characteristics of Japanese Medaka Oryzias latipes

Leaf, Robert T.; Jiao, Yan; Murphy, Brian R.; Kramer, Jeffrey I.; Sorensen, Karl M.; Wooten, Victor G.

doi:10.1643/ci-09-190

Cited by 20 publications

(26 citation statements)

References 16 publications

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“…This result contrasts with that observed by Leaf et al (Leaf et al, 2011), probably because of their acknowledged overestimation of adult growth and the differences in experimental design. Because no differences in growth were observed, we have especially focused on Boxplots represent the first and the third quantiles and the medians of the mean size of clutch per day observed in each tank (WF0.1 to WF0.5 correspond to the tanks from the warm group and CF0.1 to CF0.5 correspond to the tanks from the cold group).…”

Section: Discussioncontrasting

confidence: 98%

“…Indeed, clutches from the warm group were significantly smaller than those from the cold group. Regarding medakas, this is dissimilar to what has been suggested by Hirshfield (Hirshfield, 1980), but is in accordance with results from Leaf et al (Leaf et al, 2011). Interestingly, because females from the warm group laid eggs more often than the females from the cold group, there was almost the same total number of eggs laid in both temperature treatments.…”

Section: Mortality and Reproductive Effortsupporting

confidence: 77%

“…Thus, despite a change in the phenology, one could consider that the investment in reproduction was similar between the two thermal groups. It is important to note, however, that for a given length, a warm-acclimated female produced eggs that were significantly smaller in diameter than those from cold-acclimated females, as previously shown by Hirshfield (Hirshfield, 1980) and Leaf et al (Leaf et al, 2011). These authors stated that it is not the size of the egg that changes with thermal treatment, but its quality.…”

Section: Mortality and Reproductive Effortmentioning

confidence: 65%

“…We observed responses throughout the duration of the adult stage (from 4 to 8 months old). This duration is relatively long for this species [mean lifespan in controlled conditions at 27°C is 1 yr (Shima and Mitani, 2004), confirmed in Leaf et al (Leaf et al, 2011)] and corresponds to almost the entire reproductive period (Hirshfield, 1980). This study was conduced over this duration because the physiological responses observed after short-term acclimation (<1 month) could be different than the responses seen after a long-term exposure [>1 month (Sidell et al, 1973;Greaney et al, 1980;Sellner and Hazel, 1982)].…”

Section: Introductionmentioning

confidence: 78%

“…Fish of this standard strain present differences in the colour of eyes and other tissues (Loosli et al, 2000;Furutani-Seiki and Wittbrodt, 2004;Sasado et al, 2010;Kinoshita et al, 2009), but can be used in ecophysiological studies because their development characteristics are similar to those of the wildtype (Sasado et al, 2010;Lawrence et al, 2012). They were studied from 4 months old (mature) to 8 months old [almost the end of life at 27°C (Shima and Mitani, 2004;Leaf et al, 2011)]. These individuals were reared under two contrasted temperatures: 20 and 30°C.…”

Section: Biological Materials and Rearing Conditionsmentioning

confidence: 99%

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Non-stressful temperature effect on oxidative balance and life history traits in adults fish (Oryzias latipes)

Hemmer-Brepson¹,

Replumaz

Romestaing

et al. 2013

Journal of Experimental Biology

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Temperature is well known to affect many biological and ecological traits, especially in ectotherms. From a physiological point of view, temperature is also positively correlated to metabolism and is often associated with an increase in reactive oxygen species (ROS) production. It has recently been suggested that ROS play a role in lifespan and resource allocation. However, only a few authors have attempted to explore the relationships between temperature, resource allocation and oxidative balance in ectotherms. Here, we measured the effect of temperature on growth, reproductive effort, offspring quantity and quality, hatching and survival rates, and the associated proximal costs, which were evaluated through the quantification of oxidative balance elements. We reared adult fish (Oryzias latipes) at two non-stressful temperatures (20 and 30°C) during a relatively long period (4 months, approximately the entire adult life). The results show a trade-off between reproduction and maintenance because investment toward growth could be neglected at the adult stage (confirmed by our results). Intriguingly, ROS-dependent damages did not differ between the two groups, probably because of the higher rate of activation of the antioxidant enzyme superoxide dismutase for warm-acclimated fish. The allocation toward antioxidant defences is associated with an earlier reproduction and a lower quality of offspring. These interesting results bring new perspectives in terms of the prediction of the impact of global warming on biota through the use of ecological theories based on oxidative balance and metabolism.

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Section: Discussioncontrasting

confidence: 98%

Section: Mortality and Reproductive Effortsupporting

confidence: 77%

Section: Mortality and Reproductive Effortmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 78%

Section: Biological Materials and Rearing Conditionsmentioning

confidence: 99%

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Non-stressful temperature effect on oxidative balance and life history traits in adults fish (Oryzias latipes)

Hemmer-Brepson¹,

Replumaz

Romestaing

et al. 2013

Journal of Experimental Biology

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Acute Copper Toxicity Displays a Nonmonotonic Relationship with Age Across the Medaka (Oryzias latipes) Life Span

Mason

Parrott

2022

Enviro Toxic and Chemistry

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The ability of an organism to cope with environmental stressors varies across the life span because of developmental stage-specific responses and age-related functional declines. In the present study, we examined the effect of age on acute copper toxicity in Japanese medaka (Oryzias latipes). We first determined the median lethal concentration (LC50) at 96 h for embryos, 7-day-old fry, and 6-month-old medaka. Embryos were exposed to 0, 15, 30, 60, 125, 250, and 500 ppb CuSO 4 through hatching. Fry were exposed to 0, 20, 50, 75, 100, 150, 250, and 500 ppb CuSO 4 for 96 h. Adult fish were exposed to 0, 100, 150, 200, 250, and 300 ppb CuSO 4 for 96 h. The 96-h LC50 was 804 ppb for embryos, 262 ppb for embryonically exposed larvae, 60.3 ppb for 7-day-old fry, and 226 ppb for adults. We then challenged cohorts of fish aged 2,

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Summary of reference chemicals evaluated by the fish short‐term reproduction assay, OECD TG229, using Japanese Medaka,Oryzias latipes

Onishi¹,

Tatarazako

Koshio

et al. 2021

J of Applied Toxicology

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Under the Organisation for Economic Co-operation and Development (OECD), the Ministry of the Environment of Japan (MOE) added Japanese medaka (Oryzias latipes) to the test guideline fish short-term reproduction assay (FSTRA) developed by the United States Environmental Protection Agency (US EPA) using fathead minnow (Pimephales promelas). The FSTRA was designed to detect endocrine disrupting effects of chemicals interacting with the hypothalamic-pituitary-gonadal axis (HPG axis) such as agonists or antagonists on the estrogen receptor (Esr) and/or the androgen receptor (AR) and steroidogenesis inhibitors. We conducted the FSTRA with Japanese medaka, in accordance with OECD test guideline number 229 (TG229), for 16 chemicals including four Esr agonists, two Esr antagonists, three AR agonists, two AR antagonists, two steroidogenesis inhibitors, two progesterone receptor agonists, and a negative substance, and evaluated the usability and the validity of the FSTRA (TG229) protocol. In addition, in vitro reporter gene assays (RGAs) using Esr1 and ARβ of Japanese medaka were performed for the 16 chemicals, to support the interpretation of the in vivo effects observed in the FSTRA. In the present study, all the test chemicals, except an antiandrogenic chemical and a weak Esr agonist, significantly reduced the reproductive status of the test fish, that is, fecundity or fertility, at concentrations where no overt toxicity was observed. Moreover, vitellogenin (VTG) induction in males and formation of secondary sex characteristics (SSC), papillary processes on the anal fin, in females was sensitive endpoints to Esr and AR agonistic effects, respectively, and might be indicators of the effect concentrations in long-term exposure. Overall, it is suggested that the in vivo FSTRA supported by in vitro RGA data can adequately detect effects on the test fish, O. latipes, and probably identify the mode of action (MOA) of the chemicals tested.

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Life-History Characteristics of Japanese Medaka Oryzias latipes

Cited by 20 publications

References 16 publications

Non-stressful temperature effect on oxidative balance and life history traits in adults fish (Oryzias latipes)

Non-stressful temperature effect on oxidative balance and life history traits in adults fish (Oryzias latipes)

Acute Copper Toxicity Displays a Nonmonotonic Relationship with Age Across the Medaka (Oryzias latipes) Life Span

Summary of reference chemicals evaluated by the fish short‐term reproduction assay, OECD TG229, using Japanese Medaka,Oryzias latipes

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