Case Study: Gill Plasticity in Larval Fishes

Sackville, Michael A.; Brauner, Colin J.

doi:10.1007/978-3-319-75935-7_15

Cited by 5 publications

(5 citation statements)

References 38 publications

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“…Aside from changes in convection (e.g. as result of HVR), larval gills show little plasticity compared with adult gills (Sackville and Brauner, 2018), supporting the idea that there may be greater constraints on branchial gas transfer during hypoxia in larvae than in adults. Therefore, it is possible that at 15 dpf, the cost of HVR far exceeds the benefit and the HVR begins to decline at a higher Pw O2 than P crit .…”

Section: Resultsmentioning

confidence: 91%

Relationships between the peak hypoxic ventilatory response and critical O2 tension in larval and adult zebrafish (Danio rerio)

Mandic

Pan

Gilmour

et al. 2020

Journal of Experimental Biology

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Fish increase ventilation during hypoxia, a reflex termed the hypoxic ventilatory response (HVR). The HVR is an effective mechanism to increase O 2 uptake, but at a high metabolic cost. Therefore, when hypoxia becomes severe enough, ventilation declines, as its benefit is diminished. The water oxygen partial pressure (Pw O2) at which this decline occurs is expected to be near the critical Pw O2 (P crit), the Pw O2 at which O 2 consumption begins to decline. Our results indicate that in zebrafish (Danio rerio), the relationship between peak HVR and P crit is dependent on developmental stage. Peak ventilation occurred at Pw O2 values higher than P crit in larvae, but at a Pw O2 significantly lower than P crit in adults. Larval zebrafish use cutaneous respiration to a greater extent than branchial respiration and the cost of sustaining the HVR may outweigh the benefit, whereas adult zebrafish, which rely on branchial respiration, may benefit from using HVR at Pw O2 below P crit .

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Section: Resultsmentioning

confidence: 91%

Relationships between the peak hypoxic ventilatory response and critical O2 tension in larval and adult zebrafish (Danio rerio)

Mandic

Pan

Gilmour

et al. 2020

Journal of Experimental Biology

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“…The developmental transitions in ionoregulatory functions of air‐breathing fishes have been documented, as has developmental plasticity in these features. The gills of aquatic larval fishes show changes in ion‐transporter expression and density of mitochondrial‐rich cells with changes in ambient ion concentrations . Presumably, similar plasticity occurs in larval air‐breathing fishes, but this has yet to be quantified.…”

Section: Developmental Phenotypic Plasticity In Air‐breathing Fishesmentioning

confidence: 99%

“…The developmental morphology, especially of the respiratory organs, has been examined in only a few species of air-breathing fishes. 115,[119][120][121] While branchial morphology is quite plastic in aquatic larval fishes, 122 it has not been extensively studied in larval air-breathing fishes. Branchial developmental plasticity, in particular, has been probed primarily using aquatic or combined aquatic and aerial hypoxia (sometimes with only nocturnal hypoxia) as an environmental stressor, which is an ecologically relevant approach given that ambient hypoxia was likely one of the environmental drivers for the evolution of air-breathing.…”

Section: Morphological Developmental Plasticitymentioning

confidence: 99%

“…The gills of aquatic larval fishes show changes in ion-transporter expression and density of mitochondrial-rich cells with changes in ambient ion concentrations. 122 Presumably, similar plasticity occurs in larval air-breathing fishes, but this has yet to be quantified. compared with normoxia (20 kPa).…”

Section: Physiological Developmental Plasticitymentioning

confidence: 99%

“…Larval fishes appear to be quite plastic in their development, especially when changes occur during their critical windows for development. 122 Larval air-breathing fishes are similarly plastic, showing modifications in morphology, physiology, behaviour and biochemistry/molecular biology when challenged by pervasive environmental stressors. Yet, our knowledge of developmental plasticity in larval airbreathing fishes remains enigmatic.…”

Section: Biochemical/molecular Developmental Plasticitymentioning

confidence: 99%

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Evolutionary and cardio‐respiratory physiology of air‐breathing and amphibious fishes

Damsgaard

Baliga

Bates³

et al. 2019

Acta Physiologica

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Air‐breathing and amphibious fishes are essential study organisms to shed insight into the required physiological shifts that supported the full transition from aquatic water‐breathing fishes to terrestrial air‐breathing tetrapods. While the origin of air‐breathing in the evolutionary history of the tetrapods has received considerable focus, much less is known about the evolutionary physiology of air‐breathing among fishes. This review summarizes recent advances within the field with specific emphasis on the cardiorespiratory regulation associated with air‐breathing and terrestrial excursions, and how respiratory physiology of these living transitional forms are affected by development and personality. Finally, we provide a detailed and re‐evaluated model of the evolution of air‐breathing among fishes that serves as a framework for addressing new questions on the cardiorespiratory changes associated with it. This review highlights the importance of combining detailed studies on piscine air‐breathing model species with comparative multi‐species studies, to add an additional dimension to our understanding of the evolutionary physiology of air‐breathing in vertebrates.

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Causes and consequences of gas bubble trauma on fish gill function

Pleizier,

Brauner

2024

J Comp Physiol B

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Case Study: Gill Plasticity in Larval Fishes

Cited by 5 publications

References 38 publications

Relationships between the peak hypoxic ventilatory response and critical O2 tension in larval and adult zebrafish (Danio rerio)

Relationships between the peak hypoxic ventilatory response and critical O2 tension in larval and adult zebrafish (Danio rerio)

Evolutionary and cardio‐respiratory physiology of air‐breathing and amphibious fishes

Causes and consequences of gas bubble trauma on fish gill function

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