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Near-future carbon dioxide levels alter fish behaviour by interfering with neurotransmitter function

It is shown that abnormal olfactory preferences and loss of behavioural lateralization exhibited by two species of larval coral reef fish exposed to high CO2 can be rapidly and effectively reversed by treatment with an antagonist of the GABA-A receptor, a major neurotransmitter receptor in the vertebrate brain.
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Hypoxia induces adaptive and reversible gross morphological changes in crucian carp gills

It is shown that crucian carp living in normoxic water have gills that lack protruding lamellae, the primary site of O2 uptake in fish, the first demonstration of an adaptive and reversible gross morphological change in the respiratory organ of an adult vertebrate in response to changes in the availability of oxygen.
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Roles of brain monoamine neurotransmitters in agonistic behaviour and stress reactions, with particular reference to fish

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Interacting effects of elevated temperature and ocean acidification on the aerobic performance of coral reef fishes

Concerns about the impacts of ocean acidification on marine life have mostly focused on how reduced carbonate saturation affects calcifying organisms. Here, we show that levels of CO2-induced…
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Evolutionary background for stress-coping styles: Relationships between physiological, behavioral, and cognitive traits in non-mammalian vertebrates

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Temperature alters the respiratory surface area of crucian carp Carassius carassius and goldfish Carassius auratus

The results suggest that the alteration of gill morphology is triggered at a given temperature, and very high oxygen affinities of crucian carp haemoglobins are revealed, particularly at high pH and low temperature, which may be prerequisites for the reduced gill respiratory surface area at low temperatures.
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Does size matter for hypoxia tolerance in fish?

Those fish species that have evolved extreme adaptations to hypoxia, including haemoglobins with exceptionally high oxygen affinities and an alternative anaerobic end‐product (ethanol), reveal that natural selection can be a much more powerful determinant of Hypoxia tolerance than scaling of physiological functions.
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Life on the edge: thermal optima for aerobic scope of equatorial reef fishes are close to current day temperatures

Investigating the thermal range at which aerobic metabolic performance is optimum in equatorial populations of coral reef fish in northern Papua New Guinea indicates that low-latitude reef fish populations are living close to their thermal optima and may be more sensitive to ocean warming than higher-latitudes populations.
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Elevated temperature reduces the respiratory scope of coral reef fishes

Differences in thermal tolerance between species, and possibly families, suggest that the community structure of reef fish assemblages might change significantly as ocean temperatures increase.
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Gill remodeling in fish – a new fashion or an ancient secret?

  • G. Nilsson
  • Environmental Science, Biology
    Journal of Experimental Biology
  • 15 July 2007
Fishes appear to have a respiratory surface area that is matched to their oxygen demands, and gill remodeling in response to changing respiratory requirements could be an ancient mechanism, occurring in many more teleosts than presently known.
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