Short-term exposure to elevated pCO2 does not affect the valve gaping response of adult eastern oysters, Crassostrea virginica, to acute heat shock under an ad libitum feeding regime

Clements, Jeff C.; Comeau, Luc A.; Carver, Claire E.; Mayrand, Élise; Plante, Sébastien; Mallet, André L.

doi:10.1016/j.jembe.2018.05.005

Cited by 18 publications

(15 citation statements)

References 69 publications

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“…While studies directly testing this association between valve closure duration and food intake would provide a more definitive answer, our data suggest that net food intake in mussels can be reduced under high temperatures and periods of high predator activity. This finding aligns well with reports of reduced glycogen content, increased mortality, and weakened byssal strength under higher temperature in previous studies (Clements et al, 2018).…”

Section: Population-and Community-level Effectssupporting

confidence: 94%

“…For the "high" temperature treatment, temperatures were manipulated to provide a temperature offset of +4°C (maximum temperature of 20 °C; Figure S2). We capped temperature manipulations at 16 °C and 20 °C to avoid temperature-related mortality that can occur during long exposures to temperatures above 20°C (Clements et al 2018) and to avoid spawning. For pH, ambient conditions were followed for the duration of the exposure period for the "ambient" pH treatment.…”

Section: Experimental Design and Setupmentioning

confidence: 99%

“…Turra et al, (2019) also found no effect of low pH (pH 7.70 from a control of 8.25) on startle responses in hermit crabs, Pagurus criniticornis. Clumping behaviour in Mytilus edulis (Kong et al, 2019) was affected by acidification; however multiple studies suggest no effect on baseline valve gaping activity in marine bivalves, even under extremely low pH conditions (pH < 7) (Bamber & Westerlund, 2016;Clements et al, 2018;Jakubowska & Normant, 2015). Furthermore, while valve gaping in Mytilus galloprovincialis was affected by acidification when food was reduced, normal feeding regimes saw no effect (Lassoued et al, 2019).…”

Section: Effects Of Elevated Temperature and Low Phmentioning

confidence: 99%

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Animal size and sea water temperature, but not pH, influence a repeatable startle response behaviour in a wide-ranging marine mollusc

et al. 2021

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Section: Population-and Community-level Effectssupporting

confidence: 94%

Section: Experimental Design and Setupmentioning

confidence: 99%

Section: Effects Of Elevated Temperature and Low Phmentioning

confidence: 99%

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Animal size and sea water temperature, but not pH, influence a repeatable startle response behaviour in a wide-ranging marine mollusc

et al. 2021

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“…HES has already been employed in a number of valvometry studies involving not only sessile species, such as Mytilus galloprovincialis (Comeau et al, 2019) and Crassostrea virginica (Clements et al, 2018;Casas et al, 2018 andComeau et al, 2012), but also mobile species such as scallops (Pecten maximus) (Robson et al, 2009) that are capable of swimming and jumping. Many models have been developed for calibrating valve dynamics, for example with polynomial fitting (Robson et al, 2009;Bamber and Westerlund, 2016), linear fitting (Liu et al, 2016) or negative exponential functions (Miller and Dowd, 2017).…”

Section: Technical Limitations Of Valvometry For Characterising Valvementioning

confidence: 99%

“…These sensors have been used in many engineering applications (Popovic, 2003) and have been tested with bivalves (Wilson et al, 2005;Nagai et al, 2006;Clements et al, 2018), including with Pecten maximus (Robson et al, 2009;Szostek et al, 2013). They are small, lightweight, and less invasive than other valvometry systems, as well as being easy to set up, highly sensitive and cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Calibrating Hall-Effect valvometers accounting for electromagnetic properties of the sensor and dynamic geometry of the bivalves shell

Guarini¹,

Coston‐Guarini²,

Comeau

2020

Preprint

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Hall-Effect valvometry (HES) is being used to describe bivalve valve gape variations and infer environmental perturbations in a variety of aquatic environments. Surprisingly, the published calibrations in ecological literature ignore both the electromagnetic properties of HES and that the valves rotate around their hinge when they move. The high sensitivity of HES suggests these features should be accounted for explicitly to estimate measurement accurately. To address these issues, two calibration functions were developed based on the electromagnetic properties of the HES: one assumes that the HES and magnet are maintained on the same linear axis, and the second model accounts for the geometric properties of the system (i.e. variations of the angle between HES and the magnet during shell rotation). The great scallop (Pecten maximus) was used as biological model because of its large range of valve openings. HES were installed on the flat valve and magnets installed on the opposing rounded valve; 12 individuals of similar size (10 ± 1(SD) cm), were equipped and placed in controlled experimental conditions. A calibration was done for each individual once time series recordings were completed. The variability of parameter estimates was calculated with a bootstrap method. The second model (with rotatation) improves valve gape distance estimates for larger openings despite the decrease of sensor sensitivity. To infer valve gape dynamics, the reciprocal calculation of the calibration function was formalized and applied to the Hall voltage time series. Our analysis suggests that under controlled laboratory conditions, scallops are partially open most of the time (inter-valve distance equal ca. 27 mm on average, or 45 % of the average maximum opening distance). Interspersed in this continuous regime, individual scallops performed closing events at a frequency of ca. 2.5 closings per hour. A closing event is a movement that is fast enough relative to the recording frequency (10 Hz) to qualify as discrete. We find that the inversed calibration model without rotation allows negative value estimates, which indicates that this calibration function is incorrect. In contrast, the inversed calibration model with valve rotation around the hinge constrains gape distance values in their domain of definition which automatically excludes sensor readings that produce negative values from estimated gape time series.

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In-situ valve opening response of eastern oysters to estuarine conditions

Lavaud,

Archer,

La Peyre

et al. 2024

Mar Biol

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High-frequency recordings of valve opening behavior (VOB) in bivalves are often used to detect changes in environmental conditions. However, generally a single variable such as temperature or the presence of toxicants in the water is the focus. A description of routine VOB under non-stressful conditions is also important for interpreting responses to environmental changes. Here we present the first detailed quantitative investigation of the in-situ VOB of eastern oysters (Crassostrea virginica) to environmental variables typically not considered stressful. The VOB of eight individuals was monitored for seven weeks in a Louisiana estuary. We examined the relationships between VOB metrics (variance in mean % max opening among oysters, the probability of an oyster being closed, and the rate of valve closure), and temperature, salinity, chlorophyll-a (chl-a) concentration, the rate of change in those environmental variables, and the rate of change in water depth. Relationships were analyzed through statistical models including rates of change over 0, 0.25, 1-, 6-, 12-, and 24-hours. All the responses were best explained by the 12-hour time step model. The interaction effect between salinity and the rate of change of salinity had the greatest impact on variance in oysters’ behavior. Oysters closed faster at higher salinities and were more likely to be closed at lower chl-a concentrations. Significant interactions were found between many environmental variables, indicating a high level of complexity of oyster behavior in the natural environment. This study contributes to a better understanding of the impact of environmental conditions on oyster behavior and can help inform predictive tools for restoration initiatives and fisheries practices.

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Short-term exposure to elevated pCO2 does not affect the valve gaping response of adult eastern oysters, Crassostrea virginica, to acute heat shock under an ad libitum feeding regime

Cited by 18 publications

References 69 publications

Animal size and sea water temperature, but not pH, influence a repeatable startle response behaviour in a wide-ranging marine mollusc

Animal size and sea water temperature, but not pH, influence a repeatable startle response behaviour in a wide-ranging marine mollusc

Calibrating Hall-Effect valvometers accounting for electromagnetic properties of the sensor and dynamic geometry of the bivalves shell

In-situ valve opening response of eastern oysters to estuarine conditions

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