2007년 봄 인천만 갯벌에 있어 폭풍으로 인한 갯벌의 침식작용에 의해 대기 중으로 노출된 바지락 (Ruditapes philippinarum) 의 조직병리학적 특성에 관한 연구|RISS 상세보기

다국어 초록 (Multilingual Abstract)

In Incheon bay, mass mortalities of Manila clam associated with winter storms have been reported. In the present study we have monitored pathologic condition of the clams stranded on the tidal flats by the winter storms occurred in late March to early April in 2007. The field surveyed indicated that mortality of the Manila clam in the study areas ranged 10-15%. Condition index, a ratio of tissue weight to the shell weight, of the stranded clams was significantly lower than the non-stranded normal clams collected from the same locations (p < 0.05), indicating that the stranded clams were comparatively in poor physiological condition. Perkinsus olseni, the protozoan parasite was observed most of clams used in the analysis and the infection prevalence ranged 77-90%. The infection intensity of P. olseni determined using Ray’s fluid thioglycollate medium (RFTM) cultivation and the 2M NaOH digestion assay indicated that the clams collected during late March and early April in 2007 involved 67,182-1,124,727 P. olseni cells/g tissue. The infection intensity of clams from Gung-Pyeung was significantly higher than the intensities observed from Dae-Bu and Young-Heung (p < 0.05). No clear correlation was found between the infection intensities of P. olseni in the non-stranded normal clams and the stranded clams. The stranded Manila clams were also infected with trematode parasite with the prevalence ranged 5 (Young-Heung) to 12.5% (Dae-Bu). The trematode-infected clams exhibited castrated follicles in the gonad, a typical sign of trematode infection. It was believed that mass mortality of Manila clam observed in this study was associated with the poor physiological condition as indicated by CI, although impacts of the parasite infection cannot be ruled out.

번역하기

참고문헌 (Reference)

1 Bower, S. M., "Winter mortalities and histopathology in Manila clams (Tapes philippinarum) in British Columbia due to freezing temperatures" 11 : 255-263, 1992

2 Moschino, V., "Use of biomarkers to assess the welfare of the edible clam, Ruditapes philippinarum: may it be a tool for proving areas of origin?" 18 : 327-337, 2010

3 Choi, K. S., "The energetic cost of Perkinsus marinus parasitism in oysters: quantification of the thioglycollate method" 8 : 125-131, 1989

4 Gremare, A., "The effects of a strong winter storm on physical and biological variables at a shelf site in the Mediterranean" 26 : 407-420, 2003

5 Lopez, R. A., "Storm-related strandings of mollusks on the northeast coast of Buenos Aires, Argentina" 24 : 925-935, 2008

6 Park, K. -J., "Spring mass mortility and causes of Manila Clam, Ruditapes philippinarum beds in the West coast of Korea" 39-, 2010

7 Park, K.I., "Spatial distribution of the protozoan parasite Perkinsus sp. found in the Manila clams, Ruditapes philippinarum, in Korea" 203 : 9-22, 2001

8 Ngo, T.T.T., "Seasonal changes of Perkinsus and Cercaria infections in the Manila clam Ruditapes philippinarum from Jeju, Korea" 239 : 57-68, 2004

9 Uddin, M. J., "Seasonal Changes in Perkinsus olseni infection and Gametogenesis in Manila Clam, Ruditapes philippinarum, from Seonjaedo Island in Incheon, off the West Coast of Korea" 41 : 93-101, 2010

10 Park, K. I., "Report on the occurrence of brown ring disease (BRD) in Manila clam, Ruditapes philippinarum, on the west coast of Korea" 255 : 610-613, 2006