Valve gape behaviour of mussels ( Mytilus edulis ) exposed to dispersed crude oil as an environmental monitoring endpoint

Redmond, Kirsten J.; Berry, Mark; Pampanin, Daniela M.; Andersen, Odd Ketil

doi:10.1016/j.marpolbul.2017.02.005

Cited by 34 publications

(25 citation statements)

References 56 publications

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“…Additionally, our findings show that in behavioural studies on mussel valve movements special attention should be paid to subtle, non-binary valve reactions, which can reveal responses invisible when only two valve states (open/closed) are considered. Thus, our study may also be important for the development of early warning systems detecting environmental pollution on the basis of mussel valve movement patterns (Kramer et al, 1989;Borcherding, 2006;Robson et al, 2007;Redmond et al, 2017). Such non-target factors as predation pressure should be taken into account when calibrating these systems to avoid false alarms.…”

Section: Resultsmentioning

confidence: 99%

What scares a mussel? Changes in valve movement pattern as an immediate response of a byssate bivalve to biotic factors

Dzierżyńska‐Białończyk

Jermacz

Zielska

et al. 2019

Hydrobiologia

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Responsiveness to biotic factors is crucial for the survival of sessile aquatic animals. They cannot escape from danger, but developed a number of defences against predation, usually delayed in time. We checked the initial defence of the freshwater byssate zebra mussel, Dreissena polymorpha, associated with valve gaping. We tested the effect of chemical signals: fish predator scent (the roach Rutilus rutilus), conspecific alarm cue and a mixture of both, as well as a mechanical stimulus: the presence of an amphipod (Dikerogammarus villosus) mechanically irritating mussels. The alarm cues and amphipod presence made mussels spend more time with closed/narrowly open valves, which can be related to decreasing detection probability by reduced infochemical excretion and/or protecting soft tissues in the presence of an imminent threat. In contrast, reactions to the predator scent alone were much weaker. Moreover, the fish scent mixed with alarm substance induced weaker responses than the alarm substance alone. Thus, the fish infochemical might mask the presence of the alarm cue components, potentially benefiting the predator. A variety of defences exhibited by mussels demonstrates the importance of the predation cue type (direct/indirect, chemical/mechanical, originating from conspecifics/ predators/mixed) for the behaviour of sessile animals.

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Section: Resultsmentioning

confidence: 99%

What scares a mussel? Changes in valve movement pattern as an immediate response of a byssate bivalve to biotic factors

Dzierżyńska‐Białończyk

Jermacz

Zielska

et al. 2019

Hydrobiologia

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“…Valvometry became a generic term which encompasses many different techniques; it started with “sooted glass” techniques (Marceau 1909), and gained automation with strain gauges (Wilkens 1981), Hall-effect sensors (HES) (Nagai et al 2006), impedance electrodes (Tran et al 2003), and fiber optic sensors (Franck et al 2007). Because bivalves close their shell in response to stress, valvometry has been applied not only to study their physiology (Payton et al 2017; Comeau et al 2018) but also to characterize responses to environmental perturbations (Gaine and Shumway 1988; Nagai et al 2006, Redmond et al 2017). Valvometers based on HES have many advantages over other techinques: HES are light, compact and require only one connection to collect data.…”

Section: Introductionmentioning

confidence: 99%

Interactions between discrete events and continuous dynamics in the regulation of scallops valve opening: insights from a biophysical model

Guarini¹,

Guarini²,

Comeau

2020

Preprint

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This study constitutes a first attempt to quantify processes that govern valve gape dynamics in bivalves. We elected to focus on the scallop, Pecten maximus, not only because of its economic importance but also because it has a complex behaviour and high sensitivity to stress, which can be inferred from valve gape dynamics. The adductor muscle is the primary organ implicated in valve movements. Scallops, as other bivalves, move their valves sharply to ensure basic physiological functions or to respond to stressing conditions; these sharp events can be perceived as discrete events within a continuous dynamic. A biophysical model, originally designed for human muscles, was first selected to simulate the adductor muscle contraction, countering the passive valve opening by the umbo ligament. However, to maintain the possibility of rapid valve movements, described as typical of bivalves behaviour, it was necessary to modify the model and propose an original formulation. The resulting hybrid modelling simulates how valve opening tends to converge continuously toward a stable steady-state angle, while being interspersed with discrete, sharp closing events, deviating values from this equilibrium. The parameters of the new model were estimated by optimization using Hall-Effect Sensor valvometry data recorded in controlled conditions. Equilibrium of the continuous regime (when fiber activation equals deactivation) was estimated for a gape angle close to ca. 15 degrees, which is ca. 45% of the maximum opening angle, hence implying a constant effort produced by the adductor muscle. The distribution of time intervals between two successive discrete events did not differ significantly from a random process, but the peak amplitudes deviated from randomness, suggesting they are regulated physiologically. These results suggest that discrete events interact with continuous dynamic regimes, regulating valve opening to minimize physiological efforts and conserve energy. However, because the overall physiological state of the scallop organism conditions the activity of the adductor muscle, a complete understanding of the physiology of bivalves will require linking a more comprehensive model of valve gape dynamics with experimental observations of physiological energy consumption under different conditions.

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“…2004), laser sensors (Redmond et al . 2017), and magneto‐electric devices (Kramer & Foekema 2000; Wilson et al . 2005; Robson et al .…”

Section: Introductionmentioning

confidence: 99%

Flash flood simulation and valve behavior of Mytilus galloprovincialis measured with Hall sensors

et al. 2020

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Mussels close their shell as a protective strategy and the quantification of this behavioral marker may represent an alarm signal when they are exposed to environmental stressors. In the present study, we investigated the ability of the Mediterranean mussel Mytilus galloprovincialis to recover and then the resilience or inertia of valve activity after a pulsing exposition to diverse levels of salinity (5, 10, 20, and 35 PSU as reference value). The trial simulated an event of drastic and sudden reduction of seawater salinity thus mimicking an event of flash flood from intense rain. Valve gaping and movements were measured in continuous cycle for 10 days using a customized magneto‐electric device which uses Hall sensors. Results showed that under normal conditions of salinity (35 PSU), the general pattern of valve movements was a continuously open state with sporadic spikes indicating a closing motion. At salinity of 5, PSU mussels reacted by closing their valves, leading to a 77% mortality on the 4th day. At salinity of 10, PSU animals were observed with closed valves for the entire duration of the exposure and no mortality occurred, they showed a significant reduction in the valve activity once the reference value of salinity was re‐established. In contrast, salinity of 20 PSU did not trigger a significant behavioral response. Interestingly, there no define rhythms of valve movements were recorded during salinity challenges.

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Valve gape behaviour of mussels ( Mytilus edulis ) exposed to dispersed crude oil as an environmental monitoring endpoint

Cited by 34 publications

References 56 publications

What scares a mussel? Changes in valve movement pattern as an immediate response of a byssate bivalve to biotic factors

What scares a mussel? Changes in valve movement pattern as an immediate response of a byssate bivalve to biotic factors

Interactions between discrete events and continuous dynamics in the regulation of scallops valve opening: insights from a biophysical model

Flash flood simulation and valve behavior of Mytilus galloprovincialis measured with Hall sensors

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