Anoxia Tolerance During Vertebrate Development - Insights from Studies on the Annual Killifish Austrofundulus limnaeus

Podrabsky, Jason E.; Riggs, Claire L.; Duerr, Jeffrey M.

doi:10.5772/39079

Cited by 3 publications

(2 citation statements)

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“…Most vertebrate embryonic development is sensitive to low-DO environments, as embryos have minimal capacity to deal with the limitations that are imposed by the chorion and the detrimental effects of hypoxia (Anderson and Podrabsky 2014). Complete development of embryos requires adequate oxygen, and even short-term exposures to hypoxia or anoxia during development can have severe adverse effects (Sloper et al 1980;Podrabsky et al 2012). Fish embryos that develop under mild/moderate hypoxic conditions have been found to lose normal synchronization and possess spinal and vascular system abnormalities (Wu et al 2003).…”

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“…Fish embryos that develop under mild/moderate hypoxic conditions have been found to lose normal synchronization and possess spinal and vascular system abnormalities (Wu et al 2003). Thus, hypoxic exposures may lead to a series of negative outcomes such as impaired yolk utilization and growth at early stages of development (Hamor and Garside 1976;Wood et al 2020), decreased survival rate, delayed development, and developmental anomalies, which have been observed in the embryos of other vertebrates (Bradford and Seymour 1988;Podrabsky et al 2012). Our results revealed that hypoxia has a detrimental effect on Yellow Perch embryonic development, survival, and hatching success.…”

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Hypoxic Threshold for Yellow Perch Embryonic Development

2021

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The effects of hypoxia on the embryonic development and larval survival of Yellow Perch Perca flavescens were examined at three different dissolved oxygen (DO) concentrations: hypoxia (H) 3-4 mg/L, moderate hypoxia (MH) 5 mg/L, and normoxia (N) 7-8 mg/L. Each DO concentration was tested in replicates of four within twelve 38-L aquaria, at temperatures of 16.8 ± 0.4°C. To examine the effects of DO on the incubation of Yellow Perch embryos, samples of fertilized eggs (1.58 ± 0.1 g, 631 eggs/g) were placed in twelve 38-L aquaria. The embryos were observed until hatching, or mortality. Significant differences were observed in embryonic survival and hatching among the three DO treatments. At 43 h after fertilization (haf, optic-cup stage), embryonic development in H-treatment groups was completely arrested, while the embryos of MH and N groups developed normally, possessing a distinct body trunk shape and optic caps at 43 haf. At 168 haf, all embryos were either developmentally arrested or dead in H treatment groups, while average percentage of live embryos in MH and N treatment groups was 12 ± 9.8% and 99 ± 0.4%, respectively. Heartbeat appeared at 72 haf in the N treatment groups, and about 96 haf in MH treatment groups. Heartbeat rate differed significantly (P < 0.05) between the N and MH groups (143 ± 10/min and 117 ± 17/min, respectively). Hatching rate in N groups (78.3 ± 8.6%) was significantly higher than that of MH groups (20.0 ± 8.7%), and there was no hatching observed in H groups. In the second experiment, 300 freshly hatched (72 haf) larvae were stocked to each of the 12 aquaria to observe the effect of different oxygen concentrations (H, MH, and N) on survival for 5 d. We did not observe an effect on survival of the larvae. Overall, results indicate that hypoxic conditions below 3.5 mg/L (39% saturation at 16°C) have a profound negative effect on the development and survival of Yellow Perch embryos, while Yellow Perch larvae are capable of surviving this low-DO environment.

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Hypoxic Threshold for Yellow Perch Embryonic Development

2021

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Annual killifish adaptations to ephemeral environments: Diapause i in two austrolebias species

Arezo

Papa

Berois

et al. 2017

Developmental Dynamics

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The Effects of Hypoxia and Temperature on Developing Embryos of the Annual Killifish Austrofundulus limnaeus

Anderson

2000

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for the amazing support and feedback I received, which helped me recognize options that surrounded me during my graduate career. I give much appreciation and thanks to Keith Galbraith for the dedicated personal support he gave to the success of my project, graduate work and ultimately to my career. In addition, my family provided personal support as well as financial support, which I am truly grateful for. Finally, I express gratitude to The Henton Family for the much-needed social support, interest in my work, and encouragement throughout the whole process.

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Anoxia Tolerance During Vertebrate Development - Insights from Studies on the Annual Killifish Austrofundulus limnaeus

Cited by 3 publications

References 74 publications

Hypoxic Threshold for Yellow Perch Embryonic Development

Hypoxic Threshold for Yellow Perch Embryonic Development

Annual killifish adaptations to ephemeral environments: Diapause i in two austrolebias species

The Effects of Hypoxia and Temperature on Developing Embryos of the Annual Killifish Austrofundulus limnaeus

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