... pathways that might benefit the mussels' thermal tolerance. Thus, mussels were exposed sequentially to two different phases (heat hardening and acclimation phases). To gain further insight into the possible mechanisms underlying the metabolic response of the heat-hardened M. galloprovincialis...

... mollusks respond to chronic mechanical stress. Once a week for 7 months, we compressed whole live California mussels ( Mytilus californianus ) for 15 cycles at ∼55% of their predicted one-time breaking force, a treatment known to cause fatigue damage in shells. We found mussels repaired their shells...

.... We studied the capacity for repair in the intertidal mussel Mytilus californianus by compressing live mussels for 15 cycles at ∼79% of their predicted strength (critically fracturing 46% of shells), then allowing the survivors 0, 1, 2 or 4 weeks to repair. Immediately after fatigue loading, mussel...

... catastrophic fracture. This test does not capture the potential role of fatigue, a process by which chronic or repeated, low-magnitude forces weaken and break a structure. We quantified the strength and fatigue resistance of California mussel ( Mytilus californianus ) shells. Shells were fatigue tested until...

..., we review the major contributions in this field, and we focus on studies of mussels in the genus Mytilus , which are well-established models for the study of ecological physiology in fluctuating environments. Our review is organized into four main sections. First, we illustrate how the abiotic forces...

.... Subsequently, potential changes in gene expression were assessed. In this context, hyperthermia resulted in the transcriptional upregulation of Hsp70 and MT20 genes with a widely known salutary effect, preserving mussel fitness and performance under adverse environmental conditions. Interestingly, p38-MAPK...

... mussel byssus byssal threads Mytilidae biomechanics material properties A number of marine bivalves attach themselves to the substrate by means of a set of secreted threads, collectively termed the byssus. Although byssal threads seem to have initially evolved to aid in larval dispersal...

...Matthew J. Harrington; J. Herbert Waite SUMMARY The marine mussel Mytilus californianus Conrad inhabits the most wave-exposed regions of the rocky intertidal by dint of its extraordinary tenacity. Tenacity is mediated in large part by the byssus, a fibrous holdfast structure. M. californianus...

...Gretchen M. Moeser; Heather Leba; Emily Carrington SUMMARY The blue mussel Mytilus edulis maintains a strong attachment to the substrate in high energy environments by producing byssal threads. On the shores of Rhode Island, USA, mussel attachment strength increases twofold in spring compared...

... (e-mail: ibeis@biol.uoa.gr ) 10 10 2005 © The Company of Biologists Limited 2005 2005 mussel copper zinc cadmium signalling apoptosis hyperthermia Hsp70 Among marine invertebrates, filter-feeding lamellibranch molluscs, such as mussels, are remarkable...

...Stefanos Dailianis; Martha Kaloyianni SUMMARY The present study investigates the transduction pathway mediated by cadmium in isolated digestive gland cells of mussel Mytilus galloprovincialis . The effects of cadmium treatment on a key glycolytic enzyme, pyruvate kinase (PK), and on Na + /H...

...Jared M. Lucas; Eleonora Vaccaro; J. Herbert Waite SUMMARY Marine mussels are renowned for their ability to produce an extra-organismic tendon-like structure that can withstand the wave forces associated with the intertidal habitat. Initial characterization of byssal properties has focused...

...Jeannette E. Doeller; Manfred K. Grieshaber; David W. Kraus SUMMARY The ribbed mussel Geukensia demissa inhabits sulfide-rich coastal sediments with a distribution that suggests a preference for exposure to sulfide. Although sulfide is a respiratory poison, it is also a potent reductant. Geukensia...

... as a function of the recent thermal history of an organism. To elucidate the mechanism by which this plasticity in gene expression is achieved, we determined heat-shock protein (Hsp) induction threshold temperatures in the intertidal mussel Mytilus trossulus collected from the field in February and again...

.... In ciliated gills from Geukensia demissa , a marine mussel from sulfide-rich sediments, sulfide oxidation supports cellular work. Evidence for this comes from measurements of ciliary beat frequency ( f CB ) as a measure of ATP turnover rate, the rate of gill oxygen consumption as a measure of ATP production...

... between components of these systems. As a case study, we apply the model to the blue mussel Mytilus edulis by investigating the effect on performance of changes in the gap between neighboring tentacles. Our model suggests that the observed gaps between tentacles in M. edulis reflect flow-maximizing...

...Douglas S. Neufeld; Stephen H. Wright ABSTRACT We acclimated the estuarine mussel Geukensia demissa to a regime of sinusoidal salinity cycling (12 h cycle between 100 % and 60 % seawater) and correlated changes in the volume of gill cells with changes in several indicators of the functional status...

...Emily C. Bell; John M. Gosline ABSTRACT The competitive dominance of mussels in the wave-swept rocky intertidal zone is in part due to their ability to maintain a secure attachment. Mussels are tethered to the substratum by a byssus composed of numerous extracellular, collagenous threads secreted...

... of gills from 100 % ASW-acclimated mussels to 60 % ASW. A decrease in cell water space to 2.66 ml g −1 dry mass after 4 weeks of acclimation to 60 % ASW corresponded with a 37 % decrease in betaine content; taurine and K + contents were unchanged. The changes in water space and solute content of gills from...

... tissue h −1 for animals transferred to 0.30 mmol l −1 K + APW. A transepithelial membrane potential of -3.6±0.7 mV (blood negative compared with the bathing medium) was measured in APW-acclimated mussels. Potassium influx was measured with 42 K and displayed Michaelis–Menten saturation kinetics at dilute...