ON THE JOINT INFLUENCE OF BODY SIZE AND WATER TEMPERATURE ON THE GROWTH RATE OF THE PACIFIC OYSTER (CRASSOSTREA GIGAS, THUNBERG) IN THE DONUZLAV LIMAN (BLACK SEA)

2021 ◽  
Vol 4 (3) ◽  
pp. 74-85
Author(s):  
A. P. Zolotnitsky ◽  
A.N. Orlenko
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Water Temperature ◽  
Black Sea ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Joint Influence ◽  
The Pacific

Mitochondrial DNA Barcoding of the Pacific Oyster Crassostrea gigas (Thunberg, 1793) (Mollusca: Bivalvia: Ostreidae), Cultivated in the Black Sea

2018 ◽  
Vol 54 (12) ◽  
pp. 1445-1451
Author(s):  
Yu. V. Slynko ◽  
E. E. Slynko ◽  
A. V. Pirkova ◽  
L. V. Ladygina ◽  
V. I. Ryabushko
Keyword(s):  
Mitochondrial Dna ◽  
Dna Barcoding ◽  
Black Sea ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
The Black Sea ◽  
The Pacific

scholarly journals Evidence of differential chromosome loss in aneuploid karyotypes of the Pacific oyster, Crassostrea gigas

Genome ◽  
2001 ◽  
Vol 44 (4) ◽  
pp. 735-737 ◽  
Author(s):  
A Leitão ◽  
P Boudry ◽  
C Thiriot-Quiévreux
Keyword(s):  
Growth Rate ◽  
Negative Correlation ◽  
Crassostrea Gigas ◽  
Homologous Chromosome ◽  
Pacific Oyster ◽  
Gill Tissue ◽  
Banding Technique ◽  
Chromosome Loss ◽  
The Pacific ◽  
Different Populations

The G-banding technique was performed on aneuploid karyotypes from gill tissue of the Pacific oyster, Crassostrea gigas, to assess whether chromosome losses could be explained by differential chromosomal susceptibility and to clarify the negative correlation between aneuploidy and growth rate previously reported in different populations of this oyster. The study of 95 G-banded aneuploid karyotypes showed that only 4 of the 10 chromosome pairs (viz. 1, 5, 9, and 10) of C. gigas were affected by the loss of one homologous chromosome. Pairs 1, 9, and 10, which were lost in 56, 33, and 44% of cases, respectively, may be considered to be differentially affected. Hypotheses on this differential chromosomal susceptibility are discussed.Key words: aneuploidy, growth, G-banding, karyotype, oyster.

scholarly journals Ontogeny and water temperature influences the antiviral response of the Pacific oyster, Crassostrea gigas

2014 ◽  
Vol 36 (1) ◽  
pp. 151-157 ◽  
Author(s):  
Timothy J. Green ◽  
Caroline Montagnani ◽  
Kirsten Benkendorff ◽  
Nick Robinson ◽  
Peter Speck
Keyword(s):  
Water Temperature ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Antiviral Response ◽  
The Pacific

scholarly journals Ostreid Herpesvirus 1 Infection among Pacific Oyster (Crassostrea gigas) Spat: Relevance of Water Temperature to Virus Replication and Circulation Prior to the Onset of Mortality

2014 ◽  
Vol 80 (17) ◽  
pp. 5419-5426 ◽  
Author(s):  
Tristan Renault ◽  
Anne Lise Bouquet ◽  
Julien-Thomas Maurice ◽  
Coralie Lupo ◽  
Philippe Blachier
Keyword(s):  
Water Temperature ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Mortality Rates ◽  
Mass Mortality ◽  
Content Type ◽  
Pacific Oysters ◽  
The Pacific ◽  
Herpesvirus 1 ◽  
Ostreid Herpesvirus 1

ABSTRACTA number of bivalve species worldwide, including the Pacific oyster,Crassostrea gigas, have been affected by mass mortality events associated with herpesviruses, resulting in significant losses. A particular herpesvirus was purified from naturally infected larval Pacific oysters, and its genome was completely sequenced. This virus has been classified asOstreid herpesvirus 1(OsHV-1) within the familyMalacoherpesviridae. Since 2008, mass mortality outbreaks amongC. gigasin Europe have been related to the detection of a variant of OsHV-1 called μVar. Additional data are necessary to better describe mortality events in relation to environmental-parameter fluctuations and OsHV-1 detection. For this purpose, a single batch of Pacific oyster spat was deployed in 4 different locations in the Marennes-Oleron area (France): an oyster pond (“claire”), a shellfish nursery, and two locations in the field. Mortality rates were recorded based on regular observation, and samples were collected to search for and quantify OsHV-1 DNA by real-time PCR. Although similar massive mortality rates were reported at the 4 sites, mortality was detected earlier in the pond and in the nursery than at both field sites. This difference may be related to earlier increases in water temperature. Mass mortality was observed among oysters a few days after increases in the number of PCR-positive oysters and viral-DNA amounts were recorded. An initial increment in the number of PCR-positive oysters was reported at both field sites during the survey in the absence of significant mortality. During this period, the water temperature was below 16°C.

scholarly journals The negative correlation between somatic aneuploidy and growth in the oyster Crassostrea gigas and implications for the effects of induced polyploidization

1996 ◽  
Vol 68 (2) ◽  
pp. 109-116 ◽  
Author(s):  
E. Zouros ◽  
C. Thiriot-Quievreux ◽  
G. Kotoulas
Keyword(s):  
Growth Rate ◽  
Negative Correlation ◽  
Crassostrea Gigas ◽  
Inverse Relationship ◽  
Pacific Oyster ◽  
Chromosome Loss ◽  
Consistent Effect ◽  
The Pacific ◽  
Polyploid Cells ◽  
Recessive Genes

SummaryThis study extends previous observations that chromosome loss in somaticcells of juveniles of the pacific oyster Crassostrea gigas is associated with reduced growth rate. All four studies designed to examine this association (two usingrandom population samples and two using full sibs) produced the same result. This consistent effect appears to be unrelated with the commonly, but not consistently, observed correlation between degree of allozyme heterozygosity and growth. We propose thatthe inverse relationship between aneuploidy and growth is due to the unmasking of deleterious recessive genes caused by ‘progressive haploidization’ of somatic cells. Because unmasking of deleterious recessive genes by random chromosome lossisunlikely in polyploid cells, this hypothesis may also provide an explanation for theobservation that artificially produced polyploid shellfish usually grow at faster rates than normal diploid ones.

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