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Takeshi Sakai Michio Yoneda Tetsuro Shiraishi Muneharu Tokimura Hiroshi Horikawa Michiya Matsuyama 《Fisheries Science》2009,75(4):895-902
We studied the age and growth of the lizardfish Saurida elongata using ground thin sections of otoliths (sagittae) from specimens collected in the Tsushima/Korea Strait between May 1999
and June 2001. A total of 695 individuals with fork lengths (FL) ranging from 189 to 478 mm were examined. The frequency of
translucent zone occurrence at the outer margin of the otoliths indicated that translucent zones formed once a year between
November and February. Most of the males examined were estimated to be 2–7 years old and the females, 3–9 years old. The maximum
estimated age of a male specimen was 10 years and that of a female, 11 years. The estimated von Bertalanffy growth curves
were FL
t
= 451{1 − exp[−0.172(t + 2.50)]} and FL
t
= 515{1 − exp[−0.151(t + 2.47)]} for males and females, respectively. At all ages, the FL at a specific age for females was greater than that for
males, suggesting that females of this species grow faster than males. 相似文献
2.
In a search for new antitumor drugs, we collected 334 species of marine algae from the Japanese coastline and screened these
for tumor necrosis factor-alpha (TNF-α) production-promoting activity in an in vitro assay with the mouse macrophage-derived
cell line RAW264.7. A phosphate-buffered saline extract from the marine brown alga Chordaria flagelliformis was found to strongly promote TNF-α activity. Further purification of this alga by precipitation with ethanol and two-step
chromatography yielded an approximately 3,000-kDa polysaccharide as the active substance, which we designated MC25. MC25 exhibited
TNF-α production-promoting activity in RAW264.7 cells in a dose-dependent manner, and we established its temperature and pH
stabilities and non-cytotoxic character. Its molecular structure is similar to that of a fucoidan in terms of composition,
including glucose, fucose, xylose, and uronic acid. The molecule hydrolyzed to a size of 180–370 kDa still retained strong
TNF-α production-promoting activity, suggesting that MC25 might be a promising candidate in the development of novel antitumor
agents. 相似文献
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