A Preliminary Study on the Pattern, the Physiological Bases and the Molecular Mechanism of the Adductor Muscle Scar Pigmentation in Pacific Oyster Crassostrea gigas

Individually marked Japanese oyster drills, Ocinebra japonica, were presented with a choice of four different food organisms: mussels (Mytilus edulis); clams (Venerupis japonica); and oysters (Crassostrea gigas and Ostrea lurida). During the course of the 65-day experiment mussels constituted 42.6 per cent of the food organisms attacked by drills; clams, 36.5 per cent; and oysters, 20.9 per cent. The average time that an Ocinebra took to drill though a shell and finish feeding on the body mass are: mussels, 4.98 days; clams, 6.31 days; Olympia oysters, 5.70 days; and Pacific oysters, 14.0 days (on the basis of one Pacific oyster). Experimental evidence suggests that a drill will continue to attack the same species of food organism that it had attacked previously, rather than moving to an easily accessible organism of a different species.

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The Acute Inflammatory Reaction in Two Different Tissues of the Pacific Oyster, Crassostrea gigas

Journal of the Fisheries Research Board of Canada ◽

10.1139/f66-178 ◽

1966 ◽

Vol 23 (12) ◽

pp. 1913-1921 ◽

Cited By ~ 21

Author(s):

Gilbert B. Pauley ◽

Albert K. Sparks

Keyword(s):

Leydig Cell ◽

Crassostrea Gigas ◽

Acute Inflammation ◽

Pacific Oyster ◽

Toxic Substance ◽

Adductor Muscle ◽

Cell Area ◽

Optimum Conditions ◽

The Pacific ◽

Different Tissues

This study describes the histopathology and the associated gross pathological alterations of experimentally induced acute inflammation in the oyster, Crassostrea gigas, after turpentine injections into two different tissues, the adductor muscle and the Leydig cell area. Under optimum conditions the oyster can successfully combat a toxic substance such as turpentine, with the adductor muscle being more capable of handling such an irritant than the Leydig cell area. Inflammation in vertebrates is compared with that in the oyster.

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Regulation of adductor muscle growth by the IGF-1/AKT pathway in the triploid Pacific oyster, Crassostrea gigas

Fisheries and Aquatic Sciences ◽

10.1186/s41240-019-0134-3 ◽

2019 ◽

Vol 22 (1) ◽

Author(s):

Eun-Young Kim ◽

Youn Hee Choi

Keyword(s):

Crassostrea Gigas ◽

Pacific Oyster ◽

Muscle Growth ◽

Adductor Muscle ◽

Akt Pathway

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A Preliminary Study of Chromosomes of Two Species of Oysters (Ostrea lurida and Crassostrea gigas)

Journal of the Fisheries Research Board of Canada ◽

10.1139/f67-175 ◽

1967 ◽

Vol 24 (10) ◽

pp. 2155-2159 ◽

Cited By ~ 24

Author(s):

Muzammil Ahmed ◽

Albert K. Sparks

Keyword(s):

Chromosome Number ◽

Crassostrea Gigas ◽

Pacific Oyster ◽

Diploid Chromosome Number ◽

Ostrea Lurida ◽

Lampbrush Chromosomes ◽

Somatic Metaphase ◽

The Pacific ◽

Preliminary Study ◽

Native Oyster

A diploid chromosome number of 20 (n = 10) was found for each of the native oyster Ostrea lurida, and the Pacific oyster Crassostrea gigas. The diploid complements of the native oyster were normal but in the Pacific oyster atypical numbers, polyploid nuclei, and abnormal cleavage was observed in some somatic metaphase plates. The diplotene meiotic bivalents of the native oyster resembled lampbrush chromosomes.

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Characteristics of the Aragonitic Layer in Adult Oyster Shells,Crassostrea gigas: Structural Study of Myostracum including the Adductor Muscle Scar

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2011/742963 ◽

2011 ◽

Vol 2011 ◽

pp. 1-10 ◽

Cited By ~ 13

Author(s):

Seung-Woo Lee ◽

Young-Nam Jang ◽

Jeong-Chan Kim

Keyword(s):

Crassostrea Gigas ◽

Phase Interface ◽

Single Layer ◽

Oyster Shell ◽

Organic Matrix ◽

Transitional Zone ◽

Adductor Muscle ◽

Muscle Scar ◽

Entire Structure ◽

Adult Oyster

Myostracum, which is connected from the umbo to the edge of a scar, is not a single layer composed of prismatic layers, but a hierarchically complex multilayered shape composed of minerals and an organic matrix. Through the analysis of the secondary structure, the results revealed that aβ-antiparallel structure was predominant in the mineral phase interface between the myostracum (aragonite) and bottom folia (calcite). After the complete decalcification and deproteinization, the membrane obtained from the interface between the myostracum buried in upper folia, and the bottom folia was identified as chitin. The transitional zone in the interface between the adductor muscle scar and folia are verified. The myostracum disappeared at the edge of the scar of the posterior side. From this study, the entire structure of the myostracum from the adult oyster shell ofCrassostrea gigascould be proposed.

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