Martina Stiasny

University of Southampton · National Oceanography Centre Southampton (NOCS)

Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 fisheries resources—ranging from data-poor to data-rich stocks—in the North East Atlantic are most likely affected under the intermediate climate emission scenario RCP4.5 towards 2050. This region...

To date the study of ocean acidification on fish otolith formation has been mainly focused on larval and juvenile stages. In the present pilot study, wild-captured adult Atlantic cod (Gadus morhua) were exposed to two different levels of pCO2, 422µatm (ambient, low pCO2) or 1091µatm (high pCO2), for a period of 30 weeks (from mid-October to early A...

Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of Atlantic herring (Clupea harengus) in the Norwegian Sea indicate a need to identify which mortality factors influence larval herring survival. Previous research suggests that increased predation pre...

Environmental influences on Norwegian spring-spawning herring (Clupea harengus L.) larvae reveal recent constraints in recruitment success. The lack of any abundant recruiting year class of Norwegian spring-spawning (NSS) herring between 2005 and 2015 contributed to an approximate reduction of 40% in the spawning-stock biomass since 2009, i.e. from...

The Arctic Ocean is an early warning system for indicators and effects of climate change. We use a novel combination of experimental and time-series data on effects of ocean warming and acidification on the commercially important Northeast Arctic cod (Gadus morhua) to incorporate these physiological processes into the recruitment model of the fish...

Ocean acidification (OA), a direct consequence of increasing atmospheric CO2 concentration dissolving in ocean waters, is impacting many fish species. Little is known about the molecular mechanisms underlying the observed physiological impacts in fish. We used RNAseq to characterize the transcriptome of 3 different larval stages of Atlantic cod (Ga...

Human-induced climate change such as ocean warming and acidification, threatens marine ecosystems and associated fisheries. In the Western Baltic cod stock socio-ecological links are particularly important, with many relying on cod for their livelihoods. A series of recent experiments revealed that cod populations are negatively affected by climate...

In order to understand the effect of global change on marine fishes, it is imperative to quantify the effects on fundamental parameters such as survival and growth. Larval survival and recruitment of the Atlantic cod (Gadus morhua) was found to be heavily impaired by end‐of‐century levels of ocean acidification. Here, we analysed larval growth amon...

Ocean acidification (OA), the dissolution of excess anthropogenic carbon dioxide in ocean waters, is a potential stressor to many marine fish species. Whether species have the potential to acclimate and adapt to changes in the seawater carbonate chemistry is still largely unanswered. Simulation experiments across several generations are challenging...

Ocean acidification-the decrease in seawater pH due to rising CO2concentrations-has been shown to lower survival in early life stages of fish and, as a consequence, the recruitment of populations including commercially important species. To date, ocean-acidification studies with fish larvae have focused on the direct physiological impacts of elevat...

In the coming decades, environmental change like warming and acidification will affect life in the ocean. While data on single stressor effects on fish are accumulating rapidly, we still know relatively little about interactive effects of multiple drivers. Of particular concern in this context are the early life stages of fish, for which direct eff...

Number of larvae per sampling. Number of larvae per replicate (Tank) and sampling day in days post hatch (DPH) used for the respective analysis (SL = standard length, DW = dry weight, Gi = growth potential, Doyle = developmental stage; Swimming activity was only measured once at the end). (DOCX)

Complete results for ANCOVA. Outcome of the best fitting ANCOVA model for swimming activity with the respective likeliness of fit (R2), degrees of freedom (DF), F-values and p-values. The factors listed are additive for the described model. (DOCX)

Swimming activity over time. Mean (±sd) swimming activity per minute for four treatment combinations of temperature (10°C vs. 12°C) and CO2 (400 μatm vs. 900 μatm pCO2), measured over a 20 minute time interval. (PDF)

Complete results for repeated-measures ANOVA. Outcome of the best fitting repeated-measures ANOVA model for the different parameters with the respective degrees of freedom (DF), F-values and p-values. The factors listed are additive for the described models, e.g. Length~Time+Temp+CO2+Temp*CO2. (DOCX)

Productivity of marine fish stocks is known to be affected by environmental and ecological drivers, and global climate change is anticipated to alter recruitment success of many stocks. While the direct effects of environmental drivers on fish early life stage survival can be quantified experimentally, indirect effects in marine ecosystems and the...

Throughout the twentieth and the beginning of the twenty-first century technical advancements in many industries as well as the vast increase in world population have led to increasing emissions of greenhouse gases like carbon dioxide. The changes in the chemistry of the atmosphere not only result in retention of heat causing global warming, but al...

How fisheries will be impacted by climate change is far from understood. While some fish populations may be able to escape global warming via range shifts, they cannot escape ocean acidification (OA), an inevitable consequence of the dissolution of anthropogenic carbon dioxide (CO 2) emissions in marine waters. How ocean acidification affects popul...

Supporting Information on experimental set-up, carbon chemistry, statistics and recruitment modelling. (DOCX)

The data show the survival data of Atlantic cod larvae from two different stocks, which were measured in two separate experiments in Kristineberg, Sweden in 2013 on the Western Baltic stock and in Tromsö, Norway in 2014 on the Barents Sea stock. Survival was measured as a response to ocean acidification, control tanks were kept at ambient CO2 conce...

Abstract The project of WP 4.7 deals with the responses of the reproduction of Gadus morhua to OAW (Ocean Acidification and Warming). Our main focus is on physiological and morphological changes in reproduction, egg quality and quantity, hemoglobin phenotypes and stress responses during incubations in high CO2 concentrations. Wild-captured cod from...

This study investigated the effect of ocean acidification (OA) and warming on the survival of Western Baltic cod (Gadus morhua) larvae reared in the laboratory in 90 L tanks at ambient CO2 concentrations (400 ppm) and CO2 concentrations as predicted for the end of the century (1000 ppm). Temperature (7°C and 9°C) as an additional stressor was studi...