Behavioural lateralization and shoaling cohesion of fish larvae altered under ocean acidification

Lopes, Ana F.; Morais, Pedro; Pimentel, Marta S.; Rosa, Rui; Munday, Philip L.; Gonçalves, Emanuel João; Faria, Ana M.

doi:10.1007/s00227-016-3026-4

Cited by 52 publications

(40 citation statements)

References 64 publications

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“…Gabazine also significantly alters the behaviour of control rockfish and pink salmon (Ou et al, 2015). However, no other study found any effect of gabazine on behaviour (Chivers et al, 2014;Lai et al, 2015;Lopes et al, 2016;Munday et al, 2016;Nilsson et al, 2012;Watson et al, 2014) or visual processing (Chung et al, 2014) in control fish. This is an interesting point because gabazine should also affect normal inhibitory GABA regulation, inducing neuronal excitation; in fact, one of the features precluding the use of gabazine as a therapeutic agent in humans is the risk of convulsions resulting from inappropriate neuronal excitation (Enna and Bowery, 1997).…”

Section: Pharmacological Considerationsmentioning

confidence: 89%

Acid–base physiology, neurobiology and behaviour in relation to CO2-induced ocean acidification

Tresguerres

Hamilton

2017

Journal of Experimental Biology

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Experimental exposure to ocean and freshwater acidification affects the behaviour of multiple aquatic organisms in laboratory tests. One proposed cause involves an imbalance in plasma chloride and bicarbonate ion concentrations as a result of acid-base regulation, causing the reversal of ionic fluxes through GABA A receptors, which leads to altered neuronal function. This model is exclusively based on differential effects of the GABA A receptor antagonist gabazine on control animals and those exposed to elevated CO 2 . However, direct measurements of actual chloride and bicarbonate concentrations in neurons and their extracellular fluids and of GABA A receptor properties in aquatic organisms are largely lacking. Similarly, very little is known about potential compensatory mechanisms, and about alternative mechanisms that might lead to ocean acidificationinduced behavioural changes. This article reviews the current knowledge on acid-base physiology, neurobiology, pharmacology and behaviour in relation to marine CO 2 -induced acidification, and identifies important topics for future research that will help us to understand the potential effects of predicted levels of aquatic acidification on organisms.

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Section: Pharmacological Considerationsmentioning

confidence: 89%

Acid–base physiology, neurobiology and behaviour in relation to CO2-induced ocean acidification

Tresguerres

Hamilton

2017

Journal of Experimental Biology

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“…Overall, experiments indicate that subtle changes in pH can dramatically affect important aspects of behaviour in many aquatic animals. This is supported by recent studies in ocean acidification that have found that elevated CO 2 levels (resulting in acidification) can disrupt shoaling preferences and shoal cohesion in coral reef fish (Lopes et al, 2016;Nadler, Killen, McCormick, Watson, & Munday, 2016). However, we still have a relatively poor understanding of the effects of freshwater acidification on shoaling decisions in fish.…”

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confidence: 74%

The impact of water pH on association preferences in fish

et al. 2019

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Acidification of lakes and rivers, as a consequence of anthropogenic interference, can cause fundamental changes to biological and ecological processes. One of the main consequences of a reduction in water pH for aquatic organisms is the disruption of their chemosensory abilities, as the detection of chemical cues underpins a wide range of decision‐making processes; for example, a reduction to low pH has been shown to interfere with predator avoidance and the detection of foraging cues. Moreover, aquatic organisms are known to make widespread use of chemical information to inform their social behaviour, although we have a comparably poor understanding of how this is impacted by water acidification, especially their shoaling behaviour. Using a standard behavioural assay, we therefore investigated the impact of low water pH on the social interactions mediated by diet‐derived chemical cues in three‐spined sticklebacks (Gasterosteus aculeatus), by quantifying social behaviour in water that varied either experimentally or naturally in pH. In both cases, we predicted that association patterns would be disrupted by low pH conditions, as reduced pH has shown to interfere with the perception of chemical cues in other non‐social contexts. Consistent with this prediction, our results demonstrate that an acute, short‐term reduction in water pH caused a breakdown in the diet‐mediated social interaction patterns seen in more alkaline water, although, interestingly, the pattern of associations for fish tested in naturally acidic water was both more complex and in a direction that was precisely contrary to our predictions. Overall, the findings provide insights into the potential effects of an acute reduction in water pH on fish communication and social interaction patterns, which may have implication for various individual, group, population and community‐level processes.

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“…Fish from high predation areas, for example, showed stronger laterality than those from low predation areas and this has been linked to schooling behavior in several species [23,25,30,51]. To further complicate the situation, exposure to elevated temperature or CO 2 levels resulted in varying directions and magnitude of change in laterality in different teleosts [34][35][36][37][38]. Some of these different effects might be due to the context of the task or a consequence of altered emotional states of the animal.…”

Section: Discussionmentioning

confidence: 99%

“…Since behavioral lateralisation is an expression of brain function, it can be used as a barometer of normal brain development and function in some contexts, namely exposure or development under climate change conditions. An increasing number of studies have reported the impact of increased CO 2 levels and elevated temperature on behavioral lateralisation in some teleost species, though with varying direction and magnitude [34][35][36][37][38]. The behavioral effects of elevated CO 2 levels in teleosts seem to stem from a dysfunction of the GABA-A neurotransmitter receptor in the brain [39].…”

Section: Introductionmentioning

confidence: 99%

Incubation under Climate Warming Affects Behavioral Lateralisation in Port Jackson Sharks

et al. 2018

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Climate change is warming the world's oceans at an unprecedented rate. Under predicted end-of-century temperatures, many teleosts show impaired development and altered critical behaviors, including behavioral lateralisation. Since laterality is an expression of brain functional asymmetries, changes in the strength and direction of lateralisation suggest that rapid climate warming might impact brain development and function. However, despite the implications for cognitive functions, the potential effects of elevated temperature in lateralisation of elasmobranch fishes are unknown. We incubated and reared Port Jackson sharks at current and projected end-of-century temperatures and measured preferential detour responses to left or right. Sharks incubated at elevated temperature showed stronger absolute laterality and were significantly biased towards the right relative to sharks reared at current temperature. We propose that animals reared under elevated temperatures might have more strongly lateralized brains to cope with deleterious effects of climate change on brain development and growth. However, far more research in elasmobranch lateralisation is needed before the significance of these results can be fully comprehended. This study provides further evidence that elasmobranchs are susceptible to the effects of future ocean warming, though behavioral mechanisms might allow animals to compensate for some of the challenges imposed by climate change.

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Behavioural lateralization and shoaling cohesion of fish larvae altered under ocean acidification

Cited by 52 publications

References 64 publications

Acid–base physiology, neurobiology and behaviour in relation to CO2-induced ocean acidification

Acid–base physiology, neurobiology and behaviour in relation to CO2-induced ocean acidification

The impact of water pH on association preferences in fish

Incubation under Climate Warming Affects Behavioral Lateralisation in Port Jackson Sharks

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