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Related to ark shells: Arcidae, scallop shells
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05) after 72 h of stress in ark shells exposed to 32[degrees]C compared with the initial value and returned to normal within the recovery period.
Glutathione peroxidase activity in CFH of ark shells exposed to 17[degrees]C and 27[degrees]C increased significantly (P < 0.
Glutathione peroxidase activity in HL of ark shells exposed to 32[degrees]C showed a biphasic change with an increase at 12 h followed by a significant decrease (P < 0.
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 aim of the current study was to evaluate the genetic diversity and genetic structure among five wild populations of ark shell collected from three localities in Japan and one locality each from Korea and China.
Lee and Kim (2003) reported that the nucleotide sequences of unidentified ark shell imported from China were identical to 5.
In this study, the estimated maximum age of ark shells from Nanao Bay was 6 y old.
Flowever, the estimated maximum age of ark shells from Sendai Bay in this study was 20 y, which is far older than the age estimated by substituting the largest size of collected specimens into the von Bertalanffy growth model obtained using shell outer growth ring data (i.
The spawning period of subcrenated ark shells in our study was shorter than that in Kasaoka Bay (Ting et al.
Interestingly, high glycogen content was maintained during the spawning period, and large numbers of developing oocytes were often present in the subcrenated ark shells after spawning.
ABSTRACT Over the period from June 2002 to June 2003, we examined the relationship of seasonal changes in the mass of the gonad and somatic tissues to environmental factors for four size groups of the zebra ark shell Arca zebra at Chacopata, in northeastern Venezuela.
For each ark shell, we first removed the byssus and secondly removed epibionts and detritus from the shells.