Showing papers on "Oyster published in 2022"
TL;DR: In this article , the authors investigate Native American oyster harvest through time in North America and Australia, placing these data in the context of sea level histories and historical catch records, and find that oyster fisheries were pervasive across space and through time, persisting for 5000-10,000 years or more.
Abstract: Historical ecology has revolutionized our understanding of fisheries and cultural landscapes, demonstrating the value of historical data for evaluating the past, present, and future of Earth's ecosystems. Despite several important studies, Indigenous fisheries generally receive less attention from scholars and managers than the 17th-20th century capitalist commercial fisheries that decimated many keystone species, including oysters. We investigate Indigenous oyster harvest through time in North America and Australia, placing these data in the context of sea level histories and historical catch records. Indigenous oyster fisheries were pervasive across space and through time, persisting for 5000-10,000 years or more. Oysters were likely managed and sometimes "farmed," and are woven into broader cultural, ritual, and social traditions. Effective stewardship of oyster reefs and other marine fisheries around the world must center Indigenous histories and include Indigenous community members to co-develop more inclusive, just, and successful strategies for restoration, harvest, and management.
26 citations
TL;DR: The results provided the first mRNA expression profile of hemocytes in oysters and revealed the heterogeneity responses under Cu exposure and revealed granulocyte was the most important responsive cell type and displayed heterogeneity responses of its two subtypes.
Abstract: Oyster hemocytes are the primary vehicles transporting and detoxifying metals and are regarded as important cells for the occurrence of colored oysters due to copper (Cu) contamination. However, its heterogeneous responses under Cu exposure have not been studied. Single-cell transcriptome profiling (scRNA-seq) provides high-resolution visual insights into tissue dynamics and environmental responses. Here, we used scRNA-seq to study the responses of different cell populations of hemocytes under Cu exposure in an estuarine oyster Crassostrea hongkongensis. The 1900 population-specific Cu-responsive genes were identified in 12 clusters of hemocytes, which provided a more sensitive technique for examining Cu exposure. The granulocyte, semigranulocyte, and hyalinocyte had specific responses, while the granulocyte was the most important responsive cell type and displayed heterogeneity responses of its two subtypes. In one subtype, Cu was transported with metal transporters and chelated with Cu chaperons in the cytoplasm. Excess Cu disturbed oxidative phosphorylation and induced reactive oxygen species production. However, in the other subtype, endocytosis was mainly responsible for Cu internalization, which was sequestered in membrane-bound granules. Collectively, our results provided the first mRNA expression profile of hemocytes in oysters and revealed the heterogeneity responses under Cu exposure.
20 citations
TL;DR: In this paper , microplastic ingestion, along with accumulated plasticizers such as bisphenol A (BPA), BPF, and DEHP were quantified in bivalves, fish, and holothurians collected from a coastal pristine area at the western Mediterranean Sea.
Abstract: Microplastic (MP) ingestion, along with accumulated plasticizers such as bisphenol A (BPA), bisphenol F (BPF), and bisphenol S (BPS), and phthalates represented by diethyl phthalate (DEP), dibutyl phthalate (DBP) and bis (2-ethylhexyl) phthalate (DEHP), were quantified in bivalves, fish, and holothurians collected from a coastal pristine area at the western Mediterranean Sea. MP ingestion in sediment-feeders holothurians (mean value 12.67 ± 7.31 MPs/individual) was statistically higher than ingestion in bivalves and fish (mean 4.83 ± 5.35 and 3 ± 4.44 MPs/individual, respectively). The main ingested polymers were polyethylene, polypropylene, and polystyrene. The levels of BPS, BPF, and DEHP were highest in bivalves' soft tissue; BPA and DBP had the highest levels in the holothurians' muscle. In addition, the levels of all plasticizers assessed were lowest in fish muscle; only BPA levels in fish were higher than in bivalves, with intermediate values between those of bivalves and holothurians. This study provides data on exposure to MPs and plasticizers of different species inhabiting Cabrera Marine Protected Area (MPA) and highlights the differences in MP ingestion and levels of plasticizers between species with different ecological characteristics and feeding strategies.
19 citations
17 citations
TL;DR: In this article , the authors focus on the biotechnological applications of the oyster mushroom (Pleurotus ostreatus L.) concerning the myco-remediation of pollutants and the bio-fermentation of agro-industrial wastes as a sustainable approach to environmental protection.
Abstract: The field of biotechnology presents us with a great chance to use many organisms, such as mushrooms, to find suitable solutions for issues that include the accumulation of agro-wastes in the environment. The green biotechnology of mushrooms (Pleurotus ostreatus L.) includes the myco-remediation of polluted soil and water as well as bio-fermentation. The circular economy approach could be effectively achieved by using oyster mushrooms (Pleurotus ostreatus L.), of which the substrate of their cultivation is considered as a vital source for producing biofertilizers, animal feeds, bioenergy, and bio-remediators. Spent mushroom substrate is also considered a crucial source for many applications, including the production of enzymes (e.g., manganese peroxidase, laccase, and lignin peroxidase) and bioethanol. The sustainable management of agro-industrial wastes (e.g., plant-based foods, animal-based foods, and non-food industries) could reduce, reuse and recycle using oyster mushrooms. This review aims to focus on the biotechnological applications of the oyster mushroom (P. ostreatus L.) concerning the field of the myco-remediation of pollutants and the bio-fermentation of agro-industrial wastes as a sustainable approach to environmental protection. This study can open new windows onto the green synthesis of metal-nanoparticles, such as nano-silver, nano-TiO2 and nano-ZnO. More investigations are needed concerning the new biotechnological approaches.
16 citations
TL;DR: The role of the environmental microbial community on immune system maturation and protection from infectious disease is still an open question in the Pacific oyster, Crassostrea gigas as discussed by the authors .
Abstract: The interaction of organisms with their surrounding microbial communities influences many biological processes, a notable example of which is the shaping of the immune system in early life. In the Pacific oyster, Crassostrea gigas, the role of the environmental microbial community on immune system maturation - and, importantly, protection from infectious disease - is still an open question.Here, we demonstrate that early life microbial exposure durably improves oyster survival when challenged with the pathogen causing Pacific oyster mortality syndrome (POMS), both in the exposed generation and in the subsequent one. Combining microbiota, transcriptomic, genetic, and epigenetic analyses, we show that the microbial exposure induced changes in epigenetic marks and a reprogramming of immune gene expression leading to long-term and intergenerational immune protection against POMS.We anticipate that this protection likely extends to additional pathogens and may prove to be an important new strategy for safeguarding oyster aquaculture efforts from infectious disease. tag the videobyte/videoabstract in this section Video Abstract.
14 citations
TL;DR: It is demonstrated that the diploid ♀ × tetraploids ♂ group has better commercial production of triploid C. angulata in the aquaculture industry.
13 citations
TL;DR: Wang et al. as discussed by the authors evaluated triploid performance characteristics, complete interploidy hybridization between diploid and tetraploid Portuguese oysters were conducted at an experimental station in Zhanjiang, Guangdong Province.
13 citations
TL;DR: In this article , three Se-enriched antioxidant peptides LLVSeMY (685.2953 Da), MMDSeML (687.1875 Da) and VSeMDSeml (703.1599 Da) were identified from fraction F6-4, which all exhibited strong cellular antioxidant activity (CAA) with EC50 values of 0.739, 0.423, and 0.395 μg/mL, respectively.
13 citations
TL;DR: The effects of HHP and storage temperature on bacterial counts, color, fatty acids and flavor compounds of oysters Crassostrea ariakensis were investigated in this paper.
12 citations
TL;DR: In this paper , sulfated oyster mushrooms (Pleurotus ostreatus) were extracted using subcritical water (SW) from 120 °C to 200 °C.
Abstract: In this study, polysaccharides from oyster mushrooms (Pleurotus ostreatus) were extracted using subcritical water (SW) from 120 °C to 200 °C. Polysaccharides obtained at the different conditions were used for chemical modification. Results showed that SW at 180 °C recovered the highest amount of polysaccharides (20.35%) and sulfated polysaccharides (PS) obtained in this condition exhibited better anticoagulant activity than other conditions in intrinsic pathway. The degree of substitution of PS was 1.83. The molecular weight of polysaccharides decreased after chemical modification. Fourier transform infrared spectroscopy confirmed the success of modification process with the peaks of sulfite groups seen at 796 cm–1, 1223 cm–1, and 1379 cm–1. In vitro anticoagulant activity showed that PS significantly improved the plasma clot form inhibition activity by intrinsic and extrinsic pathways compared to native polysaccharides. Moreover, the cytotoxicity of PS against two normal cell lines was relatively low. The findings in the present study proposed that sulfated oyster mushroom (P. ostreatus) polysaccharides could be considered an alternative to anticoagulant therapy.
01 Jan 2022
TL;DR: Wang et al. as discussed by the authors used single-cell transcriptome profiling (scRNA-seq) to map the hemocyte and assess its heterogeneity in a molluscan oyster Crassostrea hongkongensis.
Abstract: Oyster is the worldwide aquaculture molluscan and evolves a complex immune defense system, with hemocytes as the major immune system for its host defense. However, the functional heterogeneity of hemocyte has not been characterized, which markedly hinders our understanding of its defense role. Here, we used the single-cell transcriptome profiling (scRNA-seq), which provides a high-resolution visual insight into its dynamics, to map the hemocyte and assess its heterogeneity in a molluscan oyster Crassostrea hongkongensis. By combining with the cell type specific RNA-seq, thirteen subpopulations belonging to granulocyte, semi-granulocyte, and hyalinocyte were revealed. The granulocytes mainly participated in immune response and autophagy process. Pseudo-temporal ordering of granulocytes identified two different cell-lineages. The hematopoietic transcription factors regulated networks controlling their differentiations were also identified. We further identified one subpopulation of granulocytes in immune activate states with the cell cycle and immune responsive genes expressions, which illustrated the functional heterogeneity of the same cell type. Collectively, our scRNA-seq analysis demonstrated the hemocytes diversity of molluscans. The results are important in our understanding of the immune defense evolution and functional differentiation of hemocytes in Phylum Mollusca.
TL;DR: In this article, sulfated oyster mushrooms (Pleurotus ostreatus) were extracted using subcritical water (SW) from 120°C to 200°C.
Abstract: In this study, polysaccharides from oyster mushrooms (Pleurotus ostreatus) were extracted using subcritical water (SW) from 120 °C to 200 °C. Polysaccharides obtained at the different conditions were used for chemical modification. Results showed that SW at 180 °C recovered the highest amount of polysaccharides (20.35%) and sulfated polysaccharides (PS) obtained in this condition exhibited better anticoagulant activity than other conditions in intrinsic pathway. The degree of substitution of PS was 1.83. The molecular weight of polysaccharides decreased after chemical modification. Fourier transform infrared spectroscopy confirmed the success of modification process with the peaks of sulfite groups seen at 796 cm–1, 1223 cm–1, and 1379 cm–1. In vitro anticoagulant activity showed that PS significantly improved the plasma clot form inhibition activity by intrinsic and extrinsic pathways compared to native polysaccharides. Moreover, the cytotoxicity of PS against two normal cell lines was relatively low. The findings in the present study proposed that sulfated oyster mushroom (P. ostreatus) polysaccharides could be considered an alternative to anticoagulant therapy.
TL;DR: The effects of HHP and storage temperature on bacterial counts, color, fatty acids and flavor compounds of oysters Crassostrea ariakensis were investigated in this paper .
TL;DR: In this paper , the impacts of aged aquaculture microplastics (MPs) on oysters (Crassostrea gigas) were examined for two months to a cocktail of MPs representative of the contamination of the Pertuis Charentais area (Bay of Biscay, France) and issuing from oyster framing material.
TL;DR: Wang et al. as discussed by the authors used single-cell transcriptome profiling (scRNA-seq) to map the hemocyte and assess its heterogeneity in a molluscan oyster Crassostrea hongkongensis.
TL;DR: The role of the environmental microbial community on immune system maturation and protection from infectious disease is still an open question in the Pacific oyster, Crassostrea gigas as mentioned in this paper .
Abstract: The interaction of organisms with their surrounding microbial communities influences many biological processes, a notable example of which is the shaping of the immune system in early life. In the Pacific oyster, Crassostrea gigas, the role of the environmental microbial community on immune system maturation - and, importantly, protection from infectious disease - is still an open question.Here, we demonstrate that early life microbial exposure durably improves oyster survival when challenged with the pathogen causing Pacific oyster mortality syndrome (POMS), both in the exposed generation and in the subsequent one. Combining microbiota, transcriptomic, genetic, and epigenetic analyses, we show that the microbial exposure induced changes in epigenetic marks and a reprogramming of immune gene expression leading to long-term and intergenerational immune protection against POMS.We anticipate that this protection likely extends to additional pathogens and may prove to be an important new strategy for safeguarding oyster aquaculture efforts from infectious disease. tag the videobyte/videoabstract in this section Video Abstract.
TL;DR: The results suggested that the relative abundance of probiotic bacteria decreased upon ocean acidification, which favored the proliferation of pathogenic species in the intestine of oysters.
TL;DR: In this paper , the anti-obesity effect of OPS was evaluated in obese mice induced by a high-fat diet (HFD), and the results showed that OPS significantly alleviated weight gain, dyslipidemia, and metabolic endotoxemia of obese mice, and accelerated the production of short-chain fatty acids.
TL;DR: In this article , an IL-17 receptor (designated as CgIL-17R1) was identified from oyster Crassostrea gigas with an open reading frame of 3141 bp encoding 1047 amino acids.
Abstract: Inflammatory cytokine interleukin-17 (IL-17) binds its receptors (IL-17Rs) to activate the downstream immune signals and plays an important role in host defense. In the present study, an IL-17 receptor (designated as CgIL-17R1) was identified from oyster Crassostrea gigas with an open reading frame of 3141 bp encoding 1047 amino acids. The amino acid sequence of CgIL-17R1 with two conserved FN3 domains shared higher similarity with other known IL-17Rs from mollusc species. The recombinant CgIL-17R1 protein (rCgIL-17R1) displayed high binding affinity to the recombinant CgIL-17 protein (rCgIL-17) in vitro. The mRNA transcripts of CgIL-17R1 were significantly higher expressed in haemocytes, especially in granunolyctes, compared with that in other tissues. After the stimulation with Vibrio splendidus or rCgIL17-1 in vivo, the expressions of CgIL-17R1 and cell proliferation related genes (CgRunx-1, CgCDC-6, CgCDC-45, and CgCDK-2) were significantly up-regulated in haemocytes (p < 0.01). When the CgIL-17R1 expression was interfered by specific CgIL-17R1-dsRNA, the expressions of these cell proliferation related genes reduced significantly, and the proliferation rate of haemocytes declined dramatically at 6 h post V. splendidus stimulation (p < 0.01), compared to that of blank group. These results collectively indicated that CgIL-17R1 expressed in granulocytes mediated the CgIL-17 induced haemocytes proliferation during immune response in oyster C. gigas, which provided novel information about the regulation of haemocyte proliferation in invertebrates.
TL;DR: A genome wide association study in the Pacific oyster to identify genetic loci underlying resistance to bacterial Vibrios, a major group of pathogens in the ocean, revealed polygenic architecture of resistance traits, and identified 178 genes involved in various processes of immune response.
TL;DR: In this paper , the presence of microplastic in water and three commercially important bivalves, viz. green mussel (Perna viridis), edible oyster (Magallana bilineata), and black clam (Villorita cyprinoides) from five different locations of southwest coast of India was studied.
TL;DR: In this paper , the authors analyzed the lipid profiles of oyster Crassostrea gigas from Yellow Sea (YS), East China Sea, and South China Sea (SCS) through the untargeted lipidomics strategy based on UPLC-Q-Exactive Orbitrap mass spectrometry and multivariate statistics.
TL;DR: In this paper , the levels of linear alkylbenzenes and the occurrence of microplastics (MPs) in the oysters Crassostrea gigas were evaluated in six farming areas in southern Brazil.
TL;DR: In this article , the effects of calcination temperatures (550 °C, 700 °C and 900 °C) on characteristics and elemental composition of calcium oxide derived from shells of four marine species collected in Thailand: oyster ( Saccostrea cucullata), green mussel ( Perna viridis), blue swimming crab ( Portunus pelagicus ), and cuttlefish ( Sepia brevimana ).
TL;DR: In this article , the authors quantified the ability of the Eastern oyster (Crassostrea virginica) to egest MP in-situ in their biodeposits - feces and pseudofeces.
TL;DR: In this article , the fitness and recoverability of the pearl oyster (Pinctada maxima) after two consecutive heatwaves (24 °C to 32 °C for 3 days; recovery at 24°C for 4 days).
TL;DR: In this article , the authors developed a framework to analyze the broad macro-physiological and molecular responses over a wide pH range in juvenile oyster, identifying low tipping points for physiological traits at pH 7.3-6.9 that coincide with a major reshuffling in membrane lipids and transcriptome.
Abstract: Studies on the impact of ocean acidification on marine organisms involve exposing organisms to future acidification scenarios, which has limited relevance for coastal calcifiers living in a mosaic of habitats. Identification of tipping points beyond which detrimental effects are observed is a widely generalizable proxy of acidification susceptibility at the population level. This approach is limited to a handful of studies that focus on only a few macro-physiological traits, thus overlooking the whole organism response. Here we develop a framework to analyze the broad macro-physiological and molecular responses over a wide pH range in juvenile oyster. We identify low tipping points for physiological traits at pH 7.3-6.9 that coincide with a major reshuffling in membrane lipids and transcriptome. In contrast, a drop in pH affects shell parameters above tipping points, likely impacting animal fitness. These findings were made possible by the development of an innovative methodology to synthesize and identify the main patterns of variations in large -omic data sets, fitting them to pH and identifying molecular tipping points. We propose the broad application of our framework to the assessment of effects of global change on other organisms.
TL;DR: In this article , a genetically improved orange-shell line of C. gigas was formed through hybridization and subsequent mass selection using 15 microsatellites and mitochondrial cytochrome oxidase I sequences (mtCOI).
TL;DR: Zhanjiang Bay, a semi-enclosed bay in south China and famous for considerable mariculture industry, was investigated in this paper to evaluate whether mariculture activities accelerated microplastic pollution.