Physiological responses to prolonged aquatic hypoxia in the Queensland lungfish Neoceratodus forsteri

Kind, Peter; Grigg, Gordon C.; Booth, David T.

doi:10.1016/s1569-9048(02)00113-1

Cited by 40 publications

(15 citation statements)

References 29 publications

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“…These strategies are often species specific and may depend on the duration and severity of the hypoxic exposure (Boutilier et al 1988;Jensen et al 1993;Taylor and Miller 2001;Kind et al 2002;Carlson and Parsons 2003;Baker et al 2005;Richards et al 2007;Scott et al 2008). Physiological responses can include a primary response (release of stress hormones, such as cortisol and catecholamines) and changes in oxygen transport (e.g., erythrocyte number and hemoglobin), metabolic (e.g., glucose and lactate), and hydromineral (e.g., protein and ions) variables (Barton 2000;Hochachka and Lutz 2001), and an increased use of anaerobic metabolism (Dunn and Hochachka 1986;Boutilier et al 1988).…”

Section: Introductionmentioning

confidence: 99%

The effects of temperature on the physiological response to low oxygen in Atlantic sturgeon

Kieffer

Baker

Wood

et al. 2011

Fish Physiol Biochem

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Atlantic sturgeon (Acipenser oxyrhynchus), which are bottom dwelling and migratory fish, experience environmental hypoxia in their natural environment. Atlantic sturgeon, acclimated to either 5 or 15°C, were subjected to a 1 h severe (<10 mm Hg) hypoxia challenge in order to document their physiological responses. We measured hematological parameters, including O(2) transport (hemoglobin, hematocrit), ionic (chloride, osmolality), and metabolic (glucose, lactate) variables under normoxic conditions (~160 mm Hg), immediately following a 1 h exposure to hypoxic water, and following a further 2 h of recovery from this challenge in normoxic water. In a second experiment, we assessed the opercular beat frequency before, during, and after hypoxic exposure. Hemoglobin concentrations and hematocrit were significantly different between fish held at 5°C vs. 15°C and also significantly different between normoxia prior to hypoxia and following recovery. Plasma lactate concentrations increased following hypoxia at both temperatures, indicative of an increase in anaerobic metabolism. In contrast, a significant increase in plasma glucose concentrations in response to hypoxia only occurred at 5°C, suggesting different fuel demands under different temperatures. Changes in opercular beat frequency (OBF) were dependent on temperature. At 5°C, OBF increased upon exposure to hypoxia, but returned to pre-exposure levels within 35 min for the remainder of the experiment. During hypoxia at 15°C, OBF increased very briefly, but then rapidly (within 20 min) decreased to levels below control values. Following a return to normoxia, OBF quickly increased to control levels. Overall, these findings suggest that Atlantic sturgeons are relatively tolerant to short-term and severe hypoxic stress, and the strategies for hypoxia tolerance may be temperature dependent.

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Section: Introductionmentioning

confidence: 99%

The effects of temperature on the physiological response to low oxygen in Atlantic sturgeon

Kieffer

Baker

Wood

et al. 2011

Fish Physiol Biochem

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“…3). Neoceratodus satisfied almost all of its O 2 demand through aquatic gas exchange when the fish rested in normoxic water, but commenced air breathing in response to decreasing water Po 2 (Kind et al 2002) or during exercise (Grigg 1965). Control of ventilation in lungfishes has been reported for Neoceratodus by Johansen et al (1967) and Fritsche et al (1993), for Lepidosiren by Sanchez and Glass and Amin-Naves et al (2007) and for Protopterus by Johansen and Lenfant (1968) and Perry et al (2008, see also earlier studies cited in these papers).…”

Section: -5 Lungfishesmentioning

confidence: 99%

Evolution of the Cardiorespiratory System in Air-Breathing Fishes

Ishimatsu¹

2012

Aqua-BioSci. Monogr. (ABSM)

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“…Among the extant species of lungfish, all have reduced gills; however, the dependence on gill versus lung respiration differs between species. The Australian N. forsteri is not known to aestivate and is highly dependent on gill respiration as evidenced by the fact that this fish can remain submerged in normoxic water for several hours (Kind et al 2002). The South American lungfish L. paradoxa has only rudimentary gills and is thought to aestivate without cocoon formation.…”

Section: Aestivationmentioning

confidence: 99%

Metabolic Rate Suppression as a Mechanism for Surviving Environmental Challenge in Fish

Richards

2009

Aestivation

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The ability to reduce metabolic rate during exposure to environmental stress, termed metabolic rate suppression, is thought to be an important component to enhance survival in many organisms. Metabolic rate suppression can be achieved through modifications to behavior, physiology, and cellular biochemistry, all of which act to reduce whole organisms energy expenditure. This chapter will critically evaluate the use of metabolic rate suppression as a response to environmental challenge in fish using three metabolic states: aestivation, hypoxia/anoxia exposure, and diapause.

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Physiological responses to prolonged aquatic hypoxia in the Queensland lungfish Neoceratodus forsteri

Cited by 40 publications

References 29 publications

The effects of temperature on the physiological response to low oxygen in Atlantic sturgeon

The effects of temperature on the physiological response to low oxygen in Atlantic sturgeon

Evolution of the Cardiorespiratory System in Air-Breathing Fishes

Metabolic Rate Suppression as a Mechanism for Surviving Environmental Challenge in Fish

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