Selection of superior parent-shells of the pearl oyster Pinctada fucata martensii based on the serum protein contents
2008
Iwanaga, S.(Nagasaki-ken. Inst. of Fisheries (Japan)) | Kuwahara, K. | Hosokawa, H.
Serum protein content of pearl oyster Pinctada fucata martensii, an indicator of the selection of male and female parent-shells, was measured in 2002 and 2003, in order to develop a method of producing disease-resistant pearl oysters with high survival rates against the reddening adductor disease. The survival rate of 1-year-old oysters produced from parent-shells of high serum protein was compared with those obtained from the low content group. The serum protein of parent-shells ranged from 0.53 to 1.62 mg/ml in 2002 and from 0.13 to 0.86 mg/ml in 2003. The higher and lower content groups were established from high 10% and low 17-35% oysters of the frequency histogram, respectively. The oysters obtained from high content group showed high serum protein and total body weight from autumn thereafter as compared to lower group. At the end of the experiment, higher group was 5.0-20.4% higher in survival rates than lower group. Above results suggest that selection of parent-shells with high serum protein can be effective in improving survival rate during seed production.
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