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Related to ark shell: Arcidae, Ark clam
See: refuge
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10, the wear resistance of the Burnt-end Ark shell is better than that of the Scapharca subcrenata rib pattern shell.
The wear resistance of Burnt-end Ark shell and Scapharca subcrenata node rib pattern shell is better than that of Scapharca subcrenata rib pattern shell under the relative sliding velocity of 2.
No study has evaluated the antioxidant defense system and lipid peroxidation contents in the economically important ark shell Scapharca subcrenata during environmental stress.
This study was carried out to assess the activities of antioxidant enzymes (SOD and GPX) and MDA content in hemolymph of the ark shell Scapharca subcrenata during and after exposure to acute temperature changes.
Ark shell Scapharca broughtonii belongs to the family Arcidae inhabiting the muddy sediments of shallow coastal waters.
The potential for genetic exchange has recently increased among northeast Asian ark shell populations due to commercial purposes and the uncontrolled bulk release of nonnative genetic variants.
The ark shell Scapharca broughtonii (Schrenck 1867) is distributed in muddy substrates (Kan-no 1966) along the coasts of the Russian Far East, Korea, China, and Japan (Lutaenko 19]93, Matsukuma & Okutani 2000).
Several previous studies analyzed age and growth of the ark shell, and the methods used in these studies can be classified into the following 3 types: decomposition of size-frequency distribution into year-classes (Machida 1988), studies of age characteristics based on the shell's outer growth rings (Fisheries Agency 1977, Selin 2000, Silina 2006), and age studies based on acetate replicas of the shell's internal growth rings (Gabaev & Olifirenko 2001).
The subcrenated ark shell Scapharca kagoshimensis (Tokunaga, 1906) is an epifaunal bivalve inhabiting the intertidal to subtidal zones along the coasts of central and southern Japan, Korea, and China.
However, little attention has been paid to the biological characteristics of the subcrenated ark shell, especially in terms of the seasonal changes in gonad development and spawning patterns.
For each ark shell, we first removed the byssus and secondly removed epibionts and detritus from the shells.
Experimentation to improve recruitment of blood ark shell, Scapharca broughtonii, in the Seto Inland Sea.