Competitive feeding interactions between native Ostrea edulis and non-native Crassostrea gigas with implications of introducing C. gigas into commercial aquaculture in the eastern Adriatic Sea

Ezgeta-Balić, Daria; Šantić, Danijela; Šegvić-Bubić, Tanja; Bojanić, Natalia; Bužančić, Mia; Vidjak, Olja; Varezić, Dubravka Bojanić; Stagličić, Nika; Kundid, Petra; Peharda, Melita; Žužul, Iva; Grubišić, Leon; Briski, Elizabeta

doi:10.1016/j.marenvres.2020.105051

Cited by 9 publications

(3 citation statements)

References 49 publications

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“…Due to their economic value, flat oyster populations exist outside their natural range in many different countries following human‐mediated transfer (Colsoul et al, 2021). Ostrea edulis is a sessile filter‐planktotrophic species (Ezgeta‐Balić et al, 2020; Peharda et al, 2012) that can reach 20 cm and live up to 20 years, preferably in firm benthic habitats comprised of mud, rocks, hard silt or even artificial substrates created with broken shells (cultch), appearing at depths up to 80 m. The flat oyster is a protandrous hermaphrodite, maturing from 8 to 10 months, depending on environmental factors. Reproduction takes place within the females' pallial cavity, where ova are fertilized by sperm that pass through the gills as part of the normal feeding process.…”

Section: Introductionmentioning

confidence: 99%

A single genomic region involving a putative chromosome rearrangement in flat oyster (Ostrea edulis) is associated with differential host resilience to the parasite Bonamia ostreae

Sambade

Casanova

Blanco

et al. 2022

Evolutionary Applications

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European flat oyster (Ostrea edulis) is an ecologically and economically important marine bivalve, that has been severely affected by the intracellular parasite Bonamia ostreae. In this study, a flat oyster SNP array (~14,000 SNPs) was used to validate previously reported outlier loci for divergent selection associated with B. ostreae exposure in the Northeast Atlantic Area. A total of 134 wild and hatchery individuals from the North Sea, collected in naïve (NV) and long‐term affected (LTA) areas, were analysed. Genetic diversity and differentiation were related to the sampling origin (wild vs. hatchery) when using neutral markers, and to bonamiosis status (NV vs. LTA) when using outlier loci for divergent selection. Two genetic clusters appeared intermingled in all sampling locations when using outlier loci, and their frequency was associated with their bonamiosis status. When both clusters were compared, outlier data sets showed high genetic divergence (FST > 0.25) unlike neutral loci (FST not ≠ 0). Moreover, the cluster associated with LTA samples showed much higher genetic diversity and significant heterozygote excess with outlier loci, but not with neutral data. Most outliers mapped on chromosome 8 (OE‐C8) of the flat oyster genome, supporting a main genomic region underlying resilience to bonamiosis. Furthermore, differentially expressed genes previously reported between NV and LTA strains showed higher mapping density on OE‐C8. A range of relevant immune functions were specifically enriched among genes annotated on OE‐C8, providing hypotheses for resilience mechanisms to an intracellular parasite. The results suggest that marker‐assisted selection could be applied to breed resilient strains of O. edulis to bonamiosis, if lower parasite load and/or higher viability of the LTA genetic cluster following B. ostreae infection is demonstrated.

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Section: Introductionmentioning

confidence: 99%

A single genomic region involving a putative chromosome rearrangement in flat oyster (Ostrea edulis) is associated with differential host resilience to the parasite Bonamia ostreae

Sambade

Casanova

Blanco

et al. 2022

Evolutionary Applications

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“…In Croatia, C. gigas is mostly limited to the intertidal zone in which it forms dense colonies, while the native oyster Ostrea edulis is present in the subtidal exclusively, 90 so there is little overlap in which competition could occur. However, despite different zonation, field studies showed that O. edulis and C. gigas consumed similar food, and C. gigas additionally consumed O. edulis larvae 91 …”

Section: Resultsmentioning

confidence: 97%

Socioecological factors related to aquaculture introductions and production of Pacific oysters (Crassostrea gigas) worldwide

Martínez-Garciá

Ruesink

Chon

et al. 2021

Reviews in Aquaculture

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Pacific oysters (Crassostrea gigas) have been introduced worldwide for aquaculture, which can benefit food sovereignty and economic development; however, established non‐native populations may present risks for local organisms and habitats. We reviewed the documented introductions of C. gigas by country to evaluate factors related to introduction, establishment and production, and to determine impacts of feral populations. To date, C. gigas has been introduced in 64 countries and 10 territories, has been established in 32 and contributes to cupped oyster production in 36 (additionally, three native range countries). Oysters were more likely to be introduced and to establish in higher‐latitude countries, but the economic factor of per capita Gross Domestic Product per capita (GDPpc) served as a stronger explanatory variable than latitude for introduction. Earlier introduction and the use for extended periods in aquaculture, not just in trials, further increased establishment. Commercial production increased with coastline length and when established populations were present, but in contrast to establishment, declined at higher latitude. Effects of feral populations have been studied in 11 countries, spanning a range from negative to facilitative as expected for an ecosystem engineer, while reaching levels of concern warranting removal from coastlines in the UK, Norway, Sweden Australia and South Africa. The use of GDPpc in analyses revealed a widespread inequity in terms of low investment in Pacific oyster aquaculture in poorer countries, while richer countries were able to invest not only in aquaculture but also in studies of environmental impacts of feral oysters.

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“…Once introduced, C. fornicata populations expanded rapidly, and competed with the native oyster for both food and settlement area (Perry & Jackson, 2017). The Pacific oyster itself is also thought to compete with native oysters for food (Zwerschke et al, 2018;Ezgeta-Bali c et al, 2020). Some studies, however, suggest that this competition is outweighed by the benefits Pacific oysters bring in increasing stability of the biogenic reef system and providing settlement area, which benefits the native oyster (Christianen et al, 2018).…”

Section: Towards a Realistic Niche Model For Habitat Restorationmentioning

confidence: 99%

Northern Europe's suitability for offshore European flat oyster (Ostrea edulis) habitat restoration: A mechanistic niche modelling approach

Stechele

Hughes

Degraer

et al. 2023

Aquatic Conservation

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1. After centuries of overexploitation, European flat oyster (Ostrea edulis) habitats are increasingly being protected and large-scale oyster habitat restoration projects have been initiated in the North Sea, the English Channel, the Irish Sea and the north-eastern Atlantic.2. Understanding the habitat requirements of flat oysters is key in the selection process of restoration sites.3. In this study, a theoretical niche for all life stages of the flat oyster is determined using a dynamic energy budget model forced with temperature, chlorophyll a and salinity in combination with sediment composition. The suitability of Northern Europe's marine environment for flat oysters is evaluated by applying the proposed niche model on a spatial scale and evaluating spatio-temporal variability in life history traits and metabolic characteristics, such as fitness, reproductive output, settlement success and growth.4. Results show that habitat suitability is limited by low maximum summer temperature and low food availability at higher latitudes and in areas under strong influence of the Atlantic Ocean. Restoration efforts in Ireland and Scotland should be confined to protected and shallow coastal environments. Suitability in the southern North Sea is patchy and mainly depends on seabed substrate. The nearshore areas of the English Channel are highly suitable.5. The georeferenced dataset shared in this study will be useful for restoration practitioners.

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Competitive feeding interactions between native Ostrea edulis and non-native Crassostrea gigas with implications of introducing C. gigas into commercial aquaculture in the eastern Adriatic Sea

Cited by 9 publications

References 49 publications

A single genomic region involving a putative chromosome rearrangement in flat oyster (Ostrea edulis) is associated with differential host resilience to the parasite Bonamia ostreae

A single genomic region involving a putative chromosome rearrangement in flat oyster (Ostrea edulis) is associated with differential host resilience to the parasite Bonamia ostreae

Socioecological factors related to aquaculture introductions and production of Pacific oysters (Crassostrea gigas) worldwide

Northern Europe's suitability for offshore European flat oyster (Ostrea edulis) habitat restoration: A mechanistic niche modelling approach

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