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29 results for “Blue Mussels”
Blue Mussel Stable Isotope Analysis on Islands of the Virginia Coast
Blue Mussel Stable Isotope Analysis on Islands of the Virginia Coast As climate change causes ocean temperatures to rise, some intertidal organisms, like blue mussels (Mytilus edulis), are retreating northward. Species that consume blue mussels, like the federally-threatened red knot (Calidris canutus rufa), may be negatively affected by this range contraction. We investigated the variation in blue mussel abundance from 2010 - 2018 on Virginia's barrier islands, where migrating red knots eat recently settled blue mussels, and compared the oxygen isotopic composition of blue mussel shell calcite (delta^18Oc; n = 74) to delta^18Oc, which is calculated to be in equilibrium with regional ocean water, to predict their origins. During peak red knot migration (May 14 - 27), between 34 - 538 blue mussels were available/core sample, with blue mussel abundance decreasing over time. Stable isotope analyses indicated that shell umbo delta^18Oc (mean = -0.23o/oo, SE = 0.12) was more ^18O enriched than shell edge delta^18Oc (mean = -0.53 o/oo, SE = 0.10). Blue mussel umbo delta^18Oc was not different than the range of delta^18Oc calculated in equilibrium with regional ocean water off the Virginia and Delaware coasts. Umbo delta^18Oc was more ^18O enriched than the expected estuarine signature at the Delaware Bay's mouth, precluding an estuarine origin, and more ^16O enriched than the expected delta^18Oc off New Hampshire's coast, likely precluding an origin that far north. We concluded that Virginia's juvenile blue mussels likely originated in the regional ocean between the Delaware Bay and Virginia. Continued increases in regional sea surface temperature may further affect the availability of blue mussels to foraging red knots in Virginia.
Data from: Adaptive genetic variation distinguishes Chilean blue mussels (Mytilus chilensis) from different marine environments
Chilean mussel populations have been thought to be panmictic with limited genetic structure. Genotyping-by-sequencing approaches have enabled investigation of genome-wide variation that may better distinguish populations that have evolved in different environments. We investigated neutral and adaptive genetic variation in Mytilus from six locations in southern Chile with 1,240 SNP obtained with RAD-seq. Differentiation among locations with 891 neutral SNPs was low (FST = 0.005). Higher differentiation was obtained with a panel of 58 putative outlier SNPs (FST = 0.114) indicating the potential for local adaptation. This panel identified clusters of genetically related individuals and demonstrated that much of the differentiation (~92%) could be attributed to the three major regions and environments: extreme conditions in Patagonia, inner bay influenced by aquaculture (Reloncaví́), and outer bay (Chiloé Island). Patagonia samples were most distinct, but additional analysis carried out excluding this collection also revealed adaptive divergence between inner and outer bay samples. The four locations within Reloncaví́ area were most similar with all panels of markers, likely due to similar environments, high gene flow by aquaculture practices and low geographic distance. However, fine scale structure could be detected when analyses included only this zone. Our results and the SNP markers developed will be a powerful tool supporting management and programs of this harvested species.
Spat settlement and growth of blue mussels on longlines in a Faroese fjord
<p>Settlement and growth of blue mussels on three kinds of spat settlement ropes were tested. Fuzzy rope, Trawl and a flat rope commonly used as spat collectors at mussel farms in Denmark. The settlement on the flat rope was very poor, with only a few individuals so the data set consists blue mussel density on the two other spat collectors. The spat collectors were deployed at 0-15 m depth for three years with no restocking. The data is used in the report "Blue mussel spat availability and settlement on longlines in a Faroese Fjord" DOI: 10.5218/zenodo.6563040 and "Ecosystem services by blue mussels in a coastal area" Fiskaaling rit 2022-05</p>
Develop protocols to manage fouling on blue mussels
<p>Aim: Develop protocols for sea-based fouling treatment on blue mussels (<em>Mytilus edulis</em>) at an industrial scale</p> <p>1) Settlement dynamics of tube worms was evaluated using field monitoring.</p> <p>2) Fouling treatments were evaluated using lab trials (in tanks) for evaluation of effects of heat treatment of fouling organisms on mussels. A range of different temperatures and exposure times were evaluated. The data consists of parameters associated with the treatments (temperature) and survival of mussels, survival of fouling organisms (especially tube worms). Data originates from the Swedish west coast and was collected during 2020-2021.</p>
Data from: Adaptive genetic variation distinguishes Chilean blue mussels (Mytilus chilensis) from different marine environments
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Data: Responsiveness and habituation to repeated sound exposures and pulse trains in blue mussels
<p>Data abstract:</p> <p>Time series data on the valve gape behaviour of blue mussels (<em>Mytilus edulis</em>) that were exposured to sound treatments. Here, we provide the valve gape (time series data expressed in proportion open) of all mussels over the course of their trial and the timing of the sound exposures.</p> <p> </p> <p>Paper abstract:</p> <p>Anthropogenic sound has been shown to affect marine animals across taxa. However, bivalves and other invertebrates received limited attention and most studies across taxa focussed on immediate, rather than long-term, effects of sound. Most bivalves adopt a sessile or sedentary lifestyle and are therefore expected to be exposed to the same sounds for long periods or repeatedly. For this reason, bivalves are an especially relevant taxonomic group to study long-term effects of sound. In the current study, we examined whether blue mussels (<em>Mytilus edulis</em>) habituate to repeated sound exposures and whether they recover quicker from a single pulse exposure than from a pulse train. We equipped individual mussels with sensors to monitor valve gape and exposed them to repeated sound playback. We found that mussels responded to sound by partially closing their valves. This response was consistent and repeatable, but decayed over sequential exposures to the same sound stimulus, and was stronger again with exposure to a different sound. This pattern is clear evidence for acoustic habituation in a bivalve. Additionally, we found no differences in the initial response and recovery (time to return to baseline levels) between mussels that were exposed to single pulses and pulse trains. Our results therefore show that mussels are able to habituate to sound and suggest that mussels mostly respond to the onset of a pulse train. Future research is needed to determine whether mussels also habituate in situ to actual anthropogenic sound and whether a lack of a behavioural response also implies that other negative effects are also absent.</p> <p> </p> <p>Paper reference:</p> <p>Hubert, J., Booms, E., Witbaard, R., Slabbekoorn, H. (2022). Responsiveness and habituation to repeated sound exposures and pulse trains in blue mussels. <em>Journal of Experimental Marine Biology and Ecology</em>. 547, 151668. DOI: 10.1016/j.jembe.2021.151668</p>
Data set to: Spawning is accompanied by increased thermal performance in blue mussels
<p>Data for the manuscript "Spawning is accompanied by increased thermal performance in blue mussels".</p>
Interactive effects of ZnO nanoparticles and temperature on molecular and cellular stress responses of the blue mussel Mytilus edulis
<p>We investigate the molecular and cellular stress responses of tissues (gills and digestive glands) in the mussels <em>Mytilus edulis </em>exposed for 21 days to either ambient (10 °C in winter and 15 °C in summer) or elevated (by 5 °C) temperature combined with different concentrations (0, 10, 100 µg l<sup>-1</sup>) of ZnO nanoparticles or dissolved zinc. In this data set, we used a biomarker-based approach focusing on oxidative stress indicators ( lipid peroxidation and protein carbonyls) and transcription pattern of marker genes in the pathways related to cell survival and proliferation (caspase 3, Bcl-2, p53, p38 and JNK) and inflammation (COX, NF-κB, and TGF-β) of <em>M. edulis</em>. </p>
Data: Acoustic disturbance in blue mussels: sound-induced valve closure varies with pulse train speed but does not affect phytoplankton clearance rate
<p>Data abstract:</p> <p>Data on mussels' valve gape behaviour and phytoplankton clearance during sound exposure trials. We provide the raw data, processed data, scripts to process the raw data, make plots, and run the statistics.</p> <p> </p> <p>Paper abstract:</p> <p>Anthropogenic sound has increasingly become part of the marine soundscape and may negatively affect animals across all taxa. Invertebrates, including bivalves, received limited attention even though they make up a significant part of the marine biomass and are very important for higher trophic levels. Behavioural studies are critical to evaluate individual and potentially population-level impact of noise and can be used to compare the effects of different sounds. In the current study, we examined the effect of impulsive sounds with different pulse rates on the valve gape behaviour and phytoplankton clearance rate of blue mussels (<em>Mytilus</em> spp.<em>)</em>. We monitored the mussels’ valve gape using an electromagnetic valve gape monitor, and their clearance rate using spectrophotometry of phytoplankton densities in the water. We found that the mussels’ valve gape was positively correlated with their clearance rate, but the sound exposure did not significantly affect the clearance rate or reduce the valve gape of the mussels. They did close their valves upon the onset of a pulse train, but the majority of the individuals recovered to pre-exposure valve gape levels during the exposure. Individuals that were exposed to faster pulse trains returned to their baseline valve gape faster. Our results show that different sound exposures can affect animals differently, which should be taken into account for noise pollution impact assessments and mitigation measures.</p> <p> </p> <p>Paper reference:</p> <p>Hubert, J., Moens, R., Witbaard, R., Slabbekoorn, H. (2022). Acoustic disturbance in blue mussels: sound-induced valve closure varies with pulse train speed but does not affect phytoplankton clearance rate. <em>ICES Journal of Marine Science</em>. DOI: 10.1093/icesjms/fsac193.</p>
Length measurements of hatchery produced blue mussel larvae
<p>Length meaurments of blue mussel larvae (<em>Mytilus edulis</em>) produced at the Cartron Point Shellfish hatchery in collaboration with Atlantic Technological University, Ireland. </p>
Effects of hypoxia and spawning on mitochondrial metabolism and bioenergetics of the blue mussel Mytilus spp. from the Baltic Sea
<p>We studied the effect of short-term hypoxia (7 days) and spawning (pre-spawning, and 3 h and 72 h post-spawning) on mitochondrial respiration, reactive oxygen species (ROS) production, and energy budget of the mussels Mytilus edulis. The data set reports oxygen consumption, efflux of reactive oxygen species (H2O2), fractional electrol leak (ratio of H2O2 efflux to O2 consumption) in isolated mitochondria, as well as the biochemical composition and energy content of the gills and the digestive gland tissues, tissue energy demand (measured as the activity to the electron transport system) and cellular energy allogation (CEA) in the tissues of the mussels.</p>
Data from: Population genomics and connectivity of the blue mussel species complex: Insights from a North-east Atlantic hybrid zone
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Detrimental impacts of climate change may be exacerbated by density dependent population regulation in blue mussels
<p>1. The climate on our planet is changing and the range distributions of organisms are shifting in response. In aquatic environments, species might not be able to redistribute poleward or into deeper water when temperatures rise because of barriers, reduced light availability, altered water chemistry, or any combination of these. How species respond to climate change may depend on physiological adaptability, but also on the population dynamics of the species.</p> <p>2. Density dependence is a ubiquitous force that governs population dynamics and regulates population growth, yet its connections to the impacts of climate change remain little known, especially in marine studies. Reductions in density below an environmental carrying capacity may cause compensatory increases in demographic parameters and population growth rate, hence masking the impacts of climate change on populations. On the other hand, climate-driven deterioration of conditions may reduce environmental carrying capacities, making compensation less likely and populations more susceptible to the effects of stochastic processes.</p> <p>3. Here we investigate the effects of climate change on Baltic blue mussels using a 17-year data set on population density. Using a Bayesian modelling framework, we investigate the impacts of climate change, assess the magnitude and effects of density dependence, and project the likelihood of population decline by the year 2030.</p> <p>4. Our findings show negative impacts of warmer and less saline waters, both outcomes of climate change. We also show that density-dependence increases the likelihood of population decline by subjecting the population to the detrimental effects of stochastic processes (i.e., low densities where random bad years can cause local extinction, negating the possibility for random good years to offset bad years).</p> <p>5. We highlight the importance of understanding, and accounting for both density dependence and climate variation when predicting the impact of climate change on keystone species, such as the Baltic blue mussel. 08-Oct-2020</p>
Data on length, width, thickness, weight and displacement volume of blue mussel (Mytilus edulis) measured weekly in a mesocosm study over 13 weeks in 2022
<p>This data file contains the on length, width, thickness, weight and displacement volume of blue mussel (<em>Mytilus edulis</em>) measured weekly in a mesocosm study over 13 weeks in 2022. The mussels were kept in the NIVA mesocosm facility in the Oslofjord, three replicates in each of 12 basins. Half of the basins had high wave level, half had low wave level. The length of the mussels were measuerd weekly for 13 weeks. Alså the % change from one week to the next is included in the dataset. </p> <p> </p> <p> </p>
Data on changes in length, width, thickness, weight and displacement volume of blue mussel (Mytilus edulis) from the start to the end of the 13 week study in 2022.
<p>This data file contains the on changes in blue mussel (<em>Mytilus edulis</em>) length, width, thickness, weight and displacement volume from the start to the end of a 13 week study in 2022. The mussels were kept in the NIVA mesocosm facility in the Oslofjord, three replicates in each of 12 basins. Half of the basins had high wave level, half had low wave level. The length of the mussels were measuerd weekly for 13 weeks. Alså the % change from one week to the next is included in the dataset. </p>
Data from: Linking genotype to phenotype in a changing ocean: inferring the genomic architecture of a blue mussel stress response with genome-wide association
A key component to understanding the evolutionary response to a changing climate is linking underlying genetic variation to phenotypic variation in stress response. Here we use a genome-wide association approach (GWAS) to understand the genetic architecture of calcification rates under simulated climate stress. We take advantage of the genomic gradient across the blue mussel hybrid zone (Mytilus edulis and Mytilus trossulus) in the Gulf of Maine (GOM) to link genetic variation with variance in calcification rates in response to simulated climate change. Falling calcium carbonate saturation states are predicted to negatively impact many marine organisms that build calcium carbonate shells - like blue mussels. We sampled wild mussels and measured net calcification phenotypes after exposing mussels to a "climate change" common garden, where we raised temperature 3°C, decreased pH by 0.2 units, and limited food supply by filtering out planktonic particles > 5 μm, compared to ambient GOM conditions in the summer. This climate change exposure greatly increased phenotypic variation in net calcification rates compared to ambient conditions. We then used regression models to link the phenotypic variation with over 170,000 single nucleotide polymorphism loci (SNPs) generated by genotype by sequencing to identify genomic locations associated with calcification phenotype, and estimate heritability and architecture of the trait. We identified at least one of potentially 2-10 genomic regions responsible for 30% of the phenotypic variation in calcification rates that are potential targets of natural selection by climate change. Our simulations suggest a power of 13.7% with our study's average effective sample size of 118 individuals and rare alleles, but a power of > 90% when effective sample size is 900.
Data from: Blue mussel (Genus Mytilus) transcriptome response to simulated climate change in the Gulf of Maine
<p>The biogeochemistry of the Gulf of Maine is rapidly changing in response to a changing climate, including rising temperatures, acidification, and declining primary productivity. These impacts are projected to worsen over the next hundred years and will apply selective pressure on populations of marine calcifiers. This study investigates the transcriptome expression response to these changes in ecologically and economically important marine calcifiers, blue mussels. Wild mussels (<i>Mytilus edulis</i> and <i>M. trossulus</i>) were sampled from sites spanning the Gulf of Maine and exposed to two different biogeochemical water conditions: i. present-day conditions in the Gulf of Maine and ii. simulated future conditions that included elevated temperature, increased acidity, and decreased food supply. Patterns of gene expression were measured using RNA-seq from 24 mussel samples and contrasted between ambient and future conditions. The net calcification rate, a trait predicted to be under climate-induced stress, was measured for each individual over a 2-week exposure period and used as a covariate along with gene expression patterns. Generalized linear models, with and without the calcification rate, were used to identify differentially expressed transcripts between ambient and future conditions. The comparison revealed transcripts that likely comprise a core stress response characterized by the induction of molecular chaperones, genes involved in aerobic metabolism, and indicators of cellular stress. Furthermore, the model contrasts revealed transcripts that may be associated with individual variation in calcification rate and suggest possible biological processes that may have downstream effects on calcification phenotypes, such as zinc-ion binding and protein degradation. Overall, these findings contribute to the understanding of blue mussel adaptive responses to imminent climate change and suggest metabolic pathways are resilient in variable environments.</p>
Biomarker responses of the blue mussels to organic UV filters
<p>This is the metadata for the publication: <strong>Falfushynska, H., Sokolov, E. P., Fisch, K., Gazie, H., Schulz-Bull, D. E. and Sokolova, I. M.</strong> (2021). Biomarker-based assessment of sublethal toxicity of organic UV filters (ensulizole and octocrylene) in a sentinel marine bivalve Mytilus edulis. <em>Science of The Total Environment</em> <strong>798</strong>, 149171. DOI: <a href="https://doi.org/10.1016/j.scitotenv.2021.149171">10.1016/j.scitotenv.2021.149171</a></p>
Hatchery produced blue mussel (Mytilus edulis) larvae length measurements
<p>Hatchery produced blue mussel (<em>Mytilus edulis</em>) larvae length measurements. </p>
Data from: Linking genotype to phenotype in a changing ocean: inferring the genomic architecture of a blue mussel stress response with genome-wide association
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