Critical partial pressures of oxygen causing precocious hatching in Coregonus lavaretus and C. albula embryos

Czerkies, Piotr; Brzuzan, Paweł; Kordalski, Krzysztof; Luczynski, M.

doi:10.1016/s0044-8486(00)00545-7

Cited by 63 publications

(36 citation statements)

References 17 publications

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“…Subsequent analysis of the bacterial community associated with the salmon eggs (see Supplementary Movie 2) showed that, based on colony morphology and 16S rRNA sequencing, the majority of the obtained colonies were indeed the Actinobacterial isolates initially applied to the salmon eggs. In the absence of S. diclina, stressassociated hatching (Czerkies et al, 2001) of the salmon eggs was observed for one of the Streptomyces isolates but not for Frondihabitans, Arthrobacter or other Streptomyces isolates ( Supplementary Figures 5b and c). None of the bacterial isolates exhibited adverse effects on alevin survival or morphology (data not shown).…”

Section: Microbial Landscapes Of Fish Eggs Y Liu Et Almentioning

confidence: 99%

Deciphering microbial landscapes of fish eggs to mitigate emerging diseases

et al. 2014

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Animals and plants are increasingly suffering from diseases caused by fungi and oomycetes. These emerging pathogens are now recognized as a global threat to biodiversity and food security. Among oomycetes, Saprolegnia species cause significant declines in fish and amphibian populations. Fish eggs have an immature adaptive immune system and depend on nonspecific innate defences to ward off pathogens. Here, meta-taxonomic analyses revealed that Atlantic salmon eggs are home to diverse fungal, oomycete and bacterial communities. Although virulent Saprolegnia isolates were found in all salmon egg samples, a low incidence of Saprolegniosis was strongly correlated with a high richness and abundance of specific commensal Actinobacteria, with the genus Frondihabitans (Microbacteriaceae) effectively inhibiting attachment of Saprolegniato salmon eggs. These results highlight that fundamental insights into microbial landscapes of fish eggs may provide new sustainable means to mitigate emerging diseases.

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Section: Microbial Landscapes Of Fish Eggs Y Liu Et Almentioning

confidence: 99%

Deciphering microbial landscapes of fish eggs to mitigate emerging diseases

et al. 2014

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“…Indeed, the fact that some aquatic eggs in fishes and frogs accelerate hatching in response to hypoxia (e.g., Latham and Just 1989, Seymour et al 2000, Czerkies et al 2001) suggests that such a response could even have been present prior to the evolution of arboreal eggs in phyllomedusines.…”

Section: Evolution Of Adaptive Hatching Plasticitymentioning

confidence: 99%

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

Gómez-Mestre

Wiens

Warkentin

2008

Ecological Monographs

119

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Abstract. Adaptive plasticity at switch points in complex life cycles (e.g., hatching, metamorphosis) is well known, but the evolutionary history of such plasticity is not. Particularly unclear is how a single plastic response (e.g., shifts in hatching timing) evolves to respond to different threats and cues (e.g., abiotic and biotic). We conducted a comparative phylogenetic study of hatching plasticity in a group of frogs with arboreal embryos to determine when risk-accelerated hatching evolved in the clade, whether responses to two common egg-stage risks (snake predation and flooding) evolved independently, and whether the overall capacity for hatching plasticity was evolutionarily more conservative than responses to specific cues. Red-eyed treefrogs (Agalychnis callidryas) hatch early to escape from several egg-stage risks but otherwise hatch later, improving larval survival with predators. We reconstructed a phylogeny for Agalychnis and related genera based on three mitochondrial and four nuclear genes. We quantified onset of hatching competence, spontaneous hatching timing, responses to egg-stage risks, and costs of premature hatching in Agalychnis and Pachymedusa. We also assessed hatching plasticity in a basal phyllomedusine, Cruziohyla calcarifer. The capacity to hatch ;30% before the spontaneous hatching age appears ancestral for phyllomedusines, with little change over ;34-50 million years among the species examined. A strong hatching response to flooding, with no mortality of hatching-competent eggs, is similarly ancient and conserved. Premature hatchlings of Agalychnis and Pachymedusa are more vulnerable to fish predation than are full-term hatchlings, indicating a conserved risk trade-off across hatching that would make plasticity advantageous. In contrast, the hatching response to snake attack has undergone major changes at least twice in the Agalychnis-Pachymedusa clade, with two species showing substantially lower escape success than the others. Responses to different threats have thus evolved independently. The capacity for switch point plasticity may be evolutionarily more stable than the response to individual stage-specific threats.

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“…This scenario is related to Pörtner's ideas about oxygen supply and demand (Pörtner, 2001(Pörtner, , 2002 -but invokes a different transport mechanism and predicts monotonically decreasing tissue oxygen levels with increasing temperature. Evidence for temperature-induced oxygen limitation in eggs is available primarily from studies of fish eggs (Hamor and Garside, 1976;Czerkies et al, 2001). Bradford (1990) also showed, in a large comparative study of amphibians, that egg volume among species was inversely related to incubation temperature, and he hypothesized that large eggs may be oxygen limited at high temperatures.…”

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confidence: 99%

Temperature-dependent oxygen limitation in insect eggs

Woods

Hill

2004

Journal of Experimental Biology

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Most terrestrial insect embryos support metabolism with oxygen from the environment by diffusion across the eggshell. Because metabolism is more temperature sensitive than diffusion, embryos should be relatively oxygen-limited at high temperatures. We tested whether survival, development time and metabolism of eggs of a moth, Manduca sexta, were sensitive to experimentally imposed variation in atmospheric oxygen availability (5-50·kPa; normoxia at sea level is 21·kPa) across a range of biologically realistic temperatures. Temperatureoxygen interactions were apparent in most experiments. Hypoxia affected survival more strongly at warmer temperatures. Metabolic rates, measured as rates of CO2 emission, were virtually insensitive to hypo-and hyperoxia at 22°C but were strongly influenced at 37°C. Radial profiles of PO∑ inside eggs, measured using an oxygen microelectrode, demonstrated that 3-day-old eggs had broad central volumes with PO∑ less than 2·kPa, and that higher temperature led to lower PO∑. These data indicate that at realistically high temperatures (32-37°C) eggs of M. sexta were oxygen limited, even in normoxia. This result has important implications for insect population ecology and the evolution of eggshell structures, and it suggests a novel hypothesis about insect gigantism during Paleozoic hyperoxia.Movie available on-line.

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Critical partial pressures of oxygen causing precocious hatching in Coregonus lavaretus and C. albula embryos

Cited by 63 publications

References 17 publications

Deciphering microbial landscapes of fish eggs to mitigate emerging diseases

Deciphering microbial landscapes of fish eggs to mitigate emerging diseases

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

Temperature-dependent oxygen limitation in insect eggs

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