About
59
Publications
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Introduction
Additional affiliations
January 2012 - June 2015
Position
- Researcher
Description
- I’m currently working in a project with the objectives to investigate the origin, dispersal and habitat preferences of the invasive Pacific oyster using genetics, oceanographic modelling and age structure analysis as techniques.
April 2010 - December 2011
Position
- PostDoc Position
Description
- The objectives of the project were to investigate the origin, dispersal and habitat preferences of the invasive Pacific oyster (Crassostrea gigas), as well as ecological consequences of the establishment of the species.
October 2002 - April 2010
Position
- PhD student and researcher
Description
- PhD education (thesis work) and research about environmental effects of cage culture
Publications
Publications (59)
Knowledge of functional dispersal barriers in the marine environment can be used to inform a wide variety of management actions, such as marine spatial planning, restoration efforts, fisheries regulations, and invasive species management. Locations and causes of dispersal barriers can be studied through various methods, including movement tracking,...
The study examines the governance of low trophic species mariculture (LTM) using Sweden as a case study. LTM, involving species such as seaweeds and mollusks, offers ecosystem services and nutritious foods. Despite its potential to contribute to blue growth and Sustainable Development Goals, LTM development in the EU and OECD countries has stagnate...
Comprehensive but interpretable assessment of the environmental performance of diets involves choosing a set of appropriate indicators. Current knowledge and data gaps on the origin of dietary foodstuffs restrict use of indicators relying on site-specific information. This Personal View summarises commonly used indicators for assessing the environm...
Oyster reefs are often referred to as the temperate functional equivalent of coral reefs. Yet evidence for this analogy is lacking for the European native species Ostrea edulis and its biogenic habitat. Recently assembled historical data provide a unique opportunity to develop a robust definition for this ecosystem type, confirm that O. edulis are...
Anthropogenic activities have impacted marine ecosystems at extraordinary scales. Biogenic reef ecosystems built by the European flat oyster (Ostrea edulis) typically declined prior to scientific monitoring. Collating >1,600 records published over 350 years, we created a highly resolved (10km2) map of historical oyster reef presence across its biog...
Ocean ecosystems have been subjected to anthropogenic influences for centuries, but the scale of past ecosystem changes is often unknown. For centuries, the European flat oyster (Ostrea edulis), an ecosystem engineer providing biogenic reef habitats, was a culturally and economically significant source of food and trade. These reef habitats are now...
In the face of an increasing world population and a subsequent need for an increase in sustainable and healthy food production, low trophic species, such as oysters, emerge as a promising alternative. However, regional variations in oyster production techniques, market dynamics, and consumption patterns create challenges for both the global and loc...
The European flat oyster, Ostrea edulis, is a habitat-forming bivalve which was historically widespread throughout Europe. Following its decline due to overfishing, pollution, sedimentation, invasive species, and disease, O. edulis and its beds are now listed as a threatened and/or declining species and habitat by OSPAR. Increasing recognition of t...
The diverse aquaculture sector makes important contributions toward achieving the Sustainable Development Goals (SDGs)/Agenda 2030, and can increasingly do so in the future. Its important role for food security, nutrition, livelihoods, economies, and cultures is not clearly visible in the Agenda 21 declaration. This may partly reflect the state of...
Understanding the effects of environmental parameters on the reproductive cycle of shellfish is an essential tool for successful hatchery conditioning management and, consequently, for seed supply to the industry. For the tropical oyster, Crassostrea tulipa, little is known about the factors affecting the maturation process and reproduction, but th...
Sustainable harvest of wild populations requires knowledge of the underlying population structure. The focus of this study is on goldsinny wrasse (Ctenolabrus rupestris), a small marine fish inhabiting coastal waters of the north-eastern Atlantic. This species is caught in large numbers to serve as cleaner fish in salmonid aquaculture. We genotyped...
The role of seafood in supporting transitions towards more sustainable and healthier diets is often overlooked. Oysters, for example, are a nutrient dense aquatic food whose production requires no feed, freshwater, or land use. However, oyster consumption in Sweden is limited, possibly in part due to being traditionally served raw. This study inves...
The European native oyster ( Ostrea edulis ) is a threatened keystone species which historically created extensive, physically complex, biogenic habitats throughout European seas.
Overfishing and direct habitat destruction, subsequently compounded by pollution, invasive species, disease, predation and climate change have resulted in the functional...
![Average cover of rock [(A), including boulders and stones], sand (B)...](publication/367405625/figure/fig2/AS:11431281254920860@1719354646791/Average-cover-of-rock-A-including-boulders-and-stones-sand-B-and-mud-C-measured_Q320.jpg)
Introduction
As suspension-feeders, bivalves play a key role in maintaining regulatory functions of coastal ecosystems, which are linked to important ecosystem services. The functions attributed to bivalves depend on the life habits of a species (epi- or infauna) and their abundance and biomass. To properly quantify and assess these functions, deta...
To limit compromising the integrity of the planet, a shift is needed towards food production with low environmental impacts and low carbon footprint. How to put such transformative change towards sustainable food production whilst ensuring food security into practice remains a challenge and will require transdisciplinary approaches. Combining exper...
Anthropogenic consumption of nitrogen (N) and phosphorus (P) has pushed their respective planetary boundaries beyond a safe operating space causing environmental problems, and simultaneously, the depletion of finite mineral P resources is of growing concern. Previous research has found that marine biomass such as kelp, reed and mussels have a high...
Harvesting beach-cast can help mitigate marine eutrophication by closing land-marine nutrient loops and provide a blue biomass raw material for the bioeconomy. Cost–benefit analysis was applied to harvest activities during 2009–2018 on the island of Gotland in the Baltic Sea, highlighting benefits such as nutrient removal from the marine system and...
A blue-green bioeconomy revolution is underway in Europe, with particular attention being paid to the development of new or underutilized marine biomass resources. The wild harvest and mariculture of low-trophic non-fed species of marine biomass may be contributing to circular economies, the mitigation of environmental problems such as eutrophicati...
Aim
Understanding spatial patterns of the distribution of adult native oyster, Ostrea edulis, and the invasive Magallana (Crassostrea) gigas is important for management of these populations. The aim of this study was to use ensemble SDM’s to (a) identify and predict conservation hotspots, (b) assess the current level of protection for O. edulis, an...
Across its indigenous range, there are growing efforts to reintroduce and restore the European native oyster, Ostrea edulis. At many locations, active intervention is necessary to recover native oyster reefs. Actions can include the introduction of oysters in order to increase the breeding population or the introduction of a substrate or medium for...
1. The movement of people, equipment, materials, and oysters between locations carries with it the risk of moving harmful organisms, such as diseases and invasive non-native species.
2. Translocation of material and oysters from one water body to another is never risk-free and should be avoided where possible.
3. Never translocate material from a...
1. Oyster reefs are among the most threatened marine habitats globally. In Europe, oyster reefs have been extirpated from most locations within their historical range. Active restoration of the native oyster (Ostrea edulis) in Europe has grown substantially in recent years. In sharing experiences between oyster restoration projects in Europe at the...
Mussels and oysters are healthy and sustainably produced foods with great economic value. One of the most valuable bivalve molluscs in Sweden is the flat oyster, Ostrea edulis. However, domestic production of oysters fails to meet the demand on the local market at the same time as the Swedish aquaculture industry has difficulties expanding due to l...
Länsstyrelsen har i ett föreläggande (D.nr. 527-46806-2018) uppmanat Bohus Havsbruk att utföra en oberoende vetenskaplig undersökning om interaktionen mellan ejder och nuvarande skyddsnät runt företagets musselodlingar i Stigfjorden, ett område som är av stor betydelse för fågellivet. Utredningen genomfördes av IVL Svenska Miljöinstitutet på uppdra...
One of the most valuable bivalve species in Sweden is the European flat oyster, Ostrea edulis, and the interest in aquaculture of the species is high. Commercial culture of the species is, however, hampered by access to spat as neither sea based collection nor hatchery production have been able to provide reliable sources of seed. In addition, impo...
There is a growing interest in aquaculture, both globally and in Sweden. In Sweden, on a relatively small scale, mainly fish, crayfish and mussels are grown. Traditional farming in ponds, lakes, rivers and coastal areas is affected by a potential negative environmental impact in the form of local eutrophication effects and the spread of antibiotics...
År 2007 rapporterades flera oberoende observationer av det japanska jätteostronet (Magallana gigas f.d. Crassostrea gigas) in till Göteborgs universitet, och inventeringar visade att arten etablerat sig längs med den svenska västkusten från Falkenberg i söder till Strömstad vid gränsen till Norge. Utbredningen har sedan dess expanderat söderut till...
Management of invasive species is addressed in both national and international regulations regarding the protection of marine habitats and biodiversity and in regulations of aquaculture. The geographical range of the invasive Pacific oyster, Crassostrea gigas, is expanding, both through human mediated vectors and by natural dispersal. The species i...
Identifying the routes and rates of introductions is fundamental for the understand- ing of marine invasions. Recurring introductions over the last 50 yr have led to the establishment of feral Pacific oyster Crassostrea gigas populations throughout Europe. In the northern countries, Sweden and Norway, the species first occurred in large numbers in...
The salmon industry is heavily dependent on wrasse for delousing infected fish. The goldsinny wrasse is numerically the most important, and each year, millions are harvested from the wild and transported large distances into fish farms. Population genetic knowledge is required to sustainably exploit this species. Here, 1051 goldsinny wrasses from 1...
The Pacific oyster Crassostrea gigas has recently expanded its range in Scandinavia.
The expansion is presumably a result of northwards larval drift. Massive settlements were
recorded in many areas along the Swedish west coast and southern Norway in 2013 and 2014.
After the spawning season in 2014, the temperature of the surface water peaked at 24−...
In commercial aquaculture, knowledge about and means for predicting
growth rates, feed intake and energy requirements of the farmed animal in different
conditions is essential for the viability of the enterprise. As percid fish species are
relatively new in culture, there are no models available to estimate the energy
requirement of the cultured fi...
Since 2006, the Pacific oyster Crassostrea gigas has been a permanent resident on the west cost of Sweden. Because C. gigas is nonindigenous in Scandinavia, it may modify ecosystems and affect the resident biota. Individuals of C. gigas often settle in large aggregations, and the physical structure of the resulting reef provides attachment points a...
Blue mussels Mytilus edulis and the invasive Pacific oyster Crassostrea gigas are
both ecosystem engineering species which modify the environment, thus having large effects on
associated species. With the introduction of the Pacific oyster, a new biogenic structure has been
added to subtidal sediment habitats in Scandinavia. By conducting a field e...
A massive invasion of the Pacific oyster, Crassostrea gigas, has occurred in Scandinavia during the last decade. The introduction and dispersal was described through collaboration between scientists from Sweden, Denmark and Norway. This work has been followed up by national activities that clearly visualized the need for a continued collaboration b...
Japanska ostron i svenska vatten Främmande art som är här för att stanna
![Figur 43. Rödtungans tillväxt enligt Burnett et al., [101].](profile/Bjoern-Thrandur-Bjoernsson/publication/258927918/figure/fig3/AS:671523220254727@1537115020371/Figur-43-Roedtungans-tillvaext-enligt-Burnett-et-al-101_Q320.jpg)
This is a report published in Swedish by Aquaculture Centre West (Vattenbrukscentrum Väst) at the University of Gothenburg. It presents an analysis, based on economic and biological selection criteria, on which marine fish species could be successful candidate species for marine aquaculture on the Swedish west coast.
AS), eblanda@ruc.dk (EB), torjan.bodvin@imr.no (TB), jdavids@ruc.dk (JKD), lfj@fimus.dk (LFJ), tholmh@ruc.dk (THHH), anders.jelmert@imr.no (AJ), susanne.lindegarth@marecol.gu.se (SL), stein.mortensen@imr.no (SM), frithjof.moy@imr.no (FEM), pnielsen@bio.ku.dk (PN), Pia.norling@niva.no (PN), carlo_nyberg@hotmail.com (CN), htc@aqua.dtu.dk (HTC), bvism...
As an intertidal species, the Pacific oyster (Crassostrea gigas, Thunberg) is very tolerant to varying abiotic
conditions. The temperature range for survival has, however, not been fully evaluated. Most notably, information about cold tolerance of the species is missing. As a first step toward acquiring a better understanding of the species’ cold t...
Fish feed constitutes one of the largest costs in aquaculture, therefore inefficient feed management will have a negative impact on fish farm economics. Eurasian perch (Perca fluviatilis L.) is a relatively new candidate for freshwater aquaculture, however little is known about the energy requirements of this species. The aim of this study was to d...
To calculate the theoretical daily energy requirement of fish, information about the daily growth increment and
the amount of digestible energy needed (DEN) to obtain one unit of biomass gain is required. The thermal unit growth coefficient (TGC) can be used for estimation of the daily growth increment. TGC is thought to be less affected by body si...
To calculate the theoretical daily energy requirement of fish, information about the daily growth increment and
the amount of digestible energy needed (DEN) to obtain one unit of biomass gain is required. The thermal unit growth coefficient (TGC) can be used for estimation of the daily growth increment. TGC is thought to be less affected by body si...
De huvudsakliga miljöeffekterna från fiskodling är; utsläpp av närsalter och eutrofieringsproblem, rymning av fisk som kan konkurrera med och genetiskt ”förorena” vilda bestånd, samt spridning av sjukdomar från odlad fisk till vild. Fokus i detta projekt har legat på närsalterna, specifikt fosfor och dess effekt på primärproduktionen. Syftet med st...
In seasonal environments, accumulated energy reserves are important to avoid starvation mortality during periods of low resource levels. Here we investigated patterns of energy accumulation and the importance of growth history for winter survival in young-of-the-year Eurasian perch (Perca fluviatilis). Under simulated winter conditions in aquaria,...
Eurasian perch (Perca fluviatilis) is receiving increasing attention as a new species in freshwater aquaculture. Understanding perch behaviour and performance in culture is important to optimize the design and management of tanks, and other culture conditions. The objective of this study was to evaluate how different combinations of tank colour and...
Feed intake, growth and feed efficiency of juvenile perch Perca fluviatilis were significantly affected by group size, with fish in groups of 12 having lower feed intake, higher growth and higher feed efficiency than solitary individuals. The same trend was seen for fish in groups of 12 compared to fish in groups of four, and for fish in groups of...
As aquaculture of Eurasian perch (P. fluviatilis) develops, optimizing growth becomes increasingly important. Fish may be stressed by ordinary farming procedures such as handling and cleaning of tanks. This may induce behavioural changes, reduce feed intake, increase energy expenditures and thus reduce growth rates. In order to quantitatively evalu...
In commercial aquaculture, knowledge about and means for predicting growth rates, feed intake and energy requirements of the farmed animal in different conditions is essential for the viability of the enterprise. As Eurasian perch (Perca fluviatilis L.) is relatively new in culture, no growth models or suitable models for evaluation of the daily fe...
Questions
Questions (2)
Hi again. This time I wonder if anyone know of any biotoxins/algae produced toxins that can kill Crassostrea gigas? I know parasites and disease can cause mass mortalities, but how about biotoxins? Regards Åsa
Hi. Does anyone have records, observations or publications of presence of "natural" Crassostrea gigas populations along the European coastline from northern France and southwards, also in the Mediterranean? Any information is appreciated, but I need a GPS position of the site where the oysters are found. We have good occurrence data from Scandinavia, the Wadden sea, the British isles and northern France, but very little south of that.
