Heart rate variation patterns in some representatives of Bivalvia

Bakhmet, Igor; Khalaman, V. V.

doi:10.1134/s1062359006030101

Cited by 13 publications

(7 citation statements)

References 19 publications

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“…Reduction or cessation of heart rate as a hypometabolic response contributes to reducing oxygen consumption within the bivalves. In the laboratory, Mytilis edulis also exhibit bradycardia and even cardiac arrest for periods of 1-6 h (Bakhmet and Khalaman 2006). Intertidal bivalves are emersed regularly during low water and must cope with prolonged periods of reduced oxygen availability and potential hypoxia.…”

Section: Discussionmentioning

confidence: 99%

Hypoxia tolerance associated with activity reduction is a key adaptation for Laternula elliptica seasonal energetics

et al. 2007

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Seasonal dormancy is a widespread mechanism for reducing energy expenditure during periods of low energy availability. Seasonal variation in activity and the cost of pumping water through the siphons were investigated to estimate the importance of activity regulation to the seasonal energy budget of the Antarctic clam, Laternula elliptica. In the laboratory, a metabolic rate of 26.35 micromol O(2) h(-1) was estimated for a 50-mm shell length L. elliptica pumping water at -0.4 degrees C. In the field, the proportion of time siphons were visible at the sediment surface varied seasonally (32% visible in June/July compared to 86% in December/January). L. elliptica were actively pumping for a minimum of 19% of each 24-h period during winter (August) compared to a summer maximum when animals were actively pumping for 73% of the time (February). This resulted in a 3.7-fold seasonal difference in the calculated energy consumption of a 50-mm L. elliptica (19.2 micromol O(2) h(-1) in February versus 5.0 micromol O(2) h(-1) in August), which closely matches the 3.0-fold seasonal variation in metabolic rate found previously. Seasonal variation in activity could therefore be responsible for much of the seasonal difference in energy consumption of L. elliptica. Inter-annual variation in timing of the seasonal activity maxima (January 2004 and March 1999) was correlated with variation in the timing of the summer plankton bloom in Ryder Bay. In the laboratory, periods of extended siphon closure (133 +/- 114 min, mean +/- SD) were accompanied by long periods of heart arrhythmia (167 +/- 135 min), during which time blood oxygen levels dropped to values close to zero. Heart arrhythmia is most likely part of a hypo-metabolic adaptation to reduce energy costs during extended periods of siphon closure. Physiological and behavioural dormancy, with associated hypoxia tolerance, appear to be key mechanisms controlling the seasonal energy budget of L. elliptica.

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Section: Discussionmentioning

confidence: 99%

Hypoxia tolerance associated with activity reduction is a key adaptation for Laternula elliptica seasonal energetics

et al. 2007

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“…Response signal with physiological variation Previous studies used numerous different behaviors of bivalve to observe the physiological rhythm such as metabolism rate, cardiac function, mantle movement, siphon extension, byssus production, burrowing behavior and valve movement (Ortmann and Grieshaber 2003;Bakhmet and Khalaman 2006;Rodland et al 2006;Bonnard et al 2009;Jou et al 2009;Liao et al 2009). The signal signatures are species and size dependent.…”

Section: Various Environmental Conditionsmentioning

confidence: 99%

A real-time biomonitoring system to detect arsenic toxicity by valve movement in freshwater clam Corbicula fluminea

et al. 2012

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Arsenic (As) is the element of greatest ecotoxicological concern in aquatic environments. Effective monitoring and diagnosis of As pollution via a biological early warning system is a great challenge for As-affected regions. The purpose of this study was to synthesize water chemistry-based bioavailability and valve daily rhythm in Corbicula fluminea to design a biomonitoring system for detecting waterborne As. We integrated valve daily rhythm dynamic patterns and water chemistry-based Hill dose-response model to build into a programmatic mechanism of inductance-based valvometry technique for providing a rapid and cost-effective dynamic detection system. A LabVIEW graphic control program in a personal computer was employed to demonstrate completely the functional presentation of the present dynamic system. We verified the simulated dissolved As concentrations based on the valve daily rhythm behavior with published experimental data. Generally, the performance of this proposed biomonitoring system demonstrates fairly good applicability to detect waterborne As concentrations when the field As concentrations are less than 1 mg L(-1). We also revealed that the detection times were dependent on As exposure concentrations. This biomonitoring system could particularly provide real-time transmitted information on the waterborne As activity under various aquatic environments. This parsimonious C. fluminea valve rhythm behavior-based real-time biomonitoring system presents a valuable effort to promote the automated biomonitoring and offers early warnings on potential ecotoxicological risks in regions with elevated As exposure concentrations.

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“…The high variability in cardiac activity presents additional challenges for monitoring, with variation occurring not only between different species of bivalve (e.g. Marshall & McQuaid, 1993;Bakhmet & Khalaman, 2006;Xing et al, 2016) but also within a species (e.g. Bakhmet et al, 2005;da Cândido & Romero, 2006;Sarà & de Pirro, 2011).…”

Section: Advantages and Disadvantages Of Measuring Cardiac Activitymentioning

confidence: 99%

“…Bakhmet et al, 2005;da Cândido & Romero, 2006;Sarà & de Pirro, 2011). Heart rate can regularly decrease to a temporary arrest, without coordination between animals (Bakhmet & Khalaman, 2006), and cardiac activity can alter, depending on the size and weight (Nicholson, 2002;Xing et al, 2016Xing et al, , 2019 or age of individuals (Xing et al, 2016(Xing et al, , 2019, and under physiological stresses like spawning (Xing et al, 2016). Furthermore, rhythms (coordinated cardiac behavioural patterns) exist in many species, some set by ambient physical factors such as light or tide, others controlled by endogenous biochemical or physiological factors, including reproduction (e.g.…”

Section: Advantages and Disadvantages Of Measuring Cardiac Activitymentioning

confidence: 99%

Bivalve molluscs as biosensors of water quality: state of the art and future directions

Vereycken

Aldridge

2022

Hydrobiologia

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Biological early warning systems (BEWSs) monitor the behaviour or physiology of living organisms as an indirect mechanism to sense local environmental changes, and have become a widely established tool for monitoring water pollution. Complementary to conventional chemical and physical techniques, their strength lies in the ability to continuously monitor water quality, providing direct and rapid warning of toxic discharges. Bivalve molluscs (mussels and clams) are ideal sensing organisms for BEWSs, owing to their: high water filtration capacity; sensitivity to numerous, diverse pollutants; considerable longevity; high abundance; and wide range of physical responses to environmental change. Two behavioural metrics of bivalves have dominated in ecotoxicological studies, and consequently spawned development into BEWSs: valve movements, typically measured using electromagnetic techniques; and bivalve cardiac activity, typically measured using infrared photoplethysmography. However, other, less studied bivalve behaviours may exhibit pollutant impacts, including shell growth and dissolution, premature egg/larval release, horizontal movement, and burial. Such metrics may, with further research, provide bases for future BEWSs, some through current valve movement monitoring technology, others potentially through acoustic telemetry. Future bivalve-based BEWSs may become more informative and sensitive through the greater nuance that lies in integration of different metrics simultaneously and/or multi-species monitoring. Future directions may seek techniques that reduce disturbance to bivalves and enable observation of a more natural mode of behaviour, through using untethered, or entirely unequipped, specimens. With rigorous controls for individual- and population-level variation, bivalves have great power as biosensors and, bolstered by the scope for future advancements, this field has the potential to make significant contributions to future water quality management.

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Heart rate variation patterns in some representatives of Bivalvia

Cited by 13 publications

References 19 publications

Hypoxia tolerance associated with activity reduction is a key adaptation for Laternula elliptica seasonal energetics

Hypoxia tolerance associated with activity reduction is a key adaptation for Laternula elliptica seasonal energetics

A real-time biomonitoring system to detect arsenic toxicity by valve movement in freshwater clam Corbicula fluminea

Bivalve molluscs as biosensors of water quality: state of the art and future directions

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