Epipodial tentacle gene expression and predetermined resilience to summer mortality in the commercially important greenlip Abalone, Haliotis laevigata

“Summer mortality” is a phenomenon that occurs during warm water temperature spikes that results in the mass mortality of many ecologically and economically important mollusks such as abalone. This study aimed to determine whether the baseline gene expression of abalone before a laboratory-induced summer mortality event was associated with resilience to summer mortality. Tentacle transcriptomes … Continue reading Epipodial tentacle gene expression and predetermined resilience to summer mortality in the commercially important greenlip Abalone, Haliotis laevigata

Potential environmental drivers of a regional blue mussel mass mortality event (winter of 2014, Breton Sound, France)

In the context of global change, increasing mariculture production has raised particular concerns regarding its environmental impact and sustainability. Molluscs and particularly blue mussel account for a significant part of this total production. Although blue mussels are considered to be pretty resilient to environmental disturbances, we report in this study an unprecedented mussel mortality event … Continue reading Potential environmental drivers of a regional blue mussel mass mortality event (winter of 2014, Breton Sound, France)

Extreme ocean acidification reduces the susceptibility of eastern oyster shells to a polydorid parasite

Ocean acidification poses a threat to marine organisms. While the physiological and behavioural effects of ocean acidification have received much attention, the effects of acidification on the susceptibility of farmed shellfish to parasitic infections are poorly understood. Here we describe the effects of moderate (pH 7.5) and extreme (pH 7.0) ocean acidification on the susceptibility … Continue reading Extreme ocean acidification reduces the susceptibility of eastern oyster shells to a polydorid parasite

Intra-population variability of ocean acidification impacts on the physiology of Baltic blue mussels (Mytilus edulis): integrating tissue and organism response

Increased maintenance costs at cellular, and consequently organism level, are thought to be involved in shaping the sensitivity of marine calcifiers to ocean acidification (OA). Yet, knowledge of the capacity of marine calcifiers to undergo metabolic adaptation is sparse. In Kiel Fjord, blue mussels thrive despite periodically high seawater PCO2, making this population interesting for … Continue reading Intra-population variability of ocean acidification impacts on the physiology of Baltic blue mussels (Mytilus edulis): integrating tissue and organism response

Benzo[a]pyrene exposure under future ocean acidification scenarios weakens the immune responses of blood clam, Tegillarca granosa

Persistent organic pollutants (POPs) are known to converge into the ocean and accumulate in the sediment, posing great threats to marine organisms such as the sessile bottom burrowing bivalves. However, the immune toxicity of POPs, such as B[a]P, under future ocean acidification scenarios remains poorly understood to date. Therefore, in the present study, the impacts … Continue reading Benzo[a]pyrene exposure under future ocean acidification scenarios weakens the immune responses of blood clam, Tegillarca granosa

N.H. researcher finds new bacteria contaminating oysters

Cheryl Whistler and her colleagues discovered the new strain ST631 and detailed their findings in the Journal of Clinical Microbiology. Previously only one strain of the bacteria was blamed for this type of food poisoning, which Whistler said is on the rise in New England and already is responsible for an estimated 45,000 cases in … Continue reading N.H. researcher finds new bacteria contaminating oysters

What is going on with Perkinsus marinus in the Gulf of Mexico?

The National Oceanic and Atmospheric Administration (NOAA) Status and Trends Mussel Watch Program sampled the largest oysters in nearly every major US coastal lagoon and estuary in the Gulf of Mexico once during the winter from 1986 to 2010. This contribution examines trends in the principal oyster disease in the Gulf of Mexico, Dermo, caused … Continue reading What is going on with Perkinsus marinus in the Gulf of Mexico?