蓄積/排泄相におけるモスソガイ組織への54-Mnの分布〔英文〕

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Distributions of 54Mn to various tissues of female and male of perry whelks with ripe gonads were examined in accumulation and excretion phases. The differences in 54Mn distribution be-tween female and male could not be found on any tissues without regard to the phases, and therefore, on the whole bodies or the whole soft bodies as well. These findings differ greatly from the results obtained on Mn and/or 54Mn distributions in bivalves and herbivorous gastropods previously reported elsewhere. The values of i-LI of various tissues were almost equal to each other irrespec-tive of sex, and between accumulation and excretion phases except conchs in which the values of i-LI decreased more rapidly than in other tissues in the latter phase. Concentrations of 54Mn were dependent on weights of most soft tissues, and the correlations were regressed to power functions in accumulation phase. The regression lines were transformed from power functions to linear ones at certain stages in the excretion phase. The excretion curves can finally be super-imposed on the X axis when the nuclide have completely been eliminated from the tissues. Stable-Mn concentration of the ovary was significantly higher than that of the spermary as well as the bivalves and the herbivorous gastropods. A lot of eosinophilic droplets that were identified histochemically to be one of acidic mucopolysaccharides existed in the ripe ovarian tubules. This was not seen for the species whose ova and spermatozoa were discharged directly into the am-bient seawater.
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蓄積/排泄相におけるモスソガイ組織への54-Mnの分布〔英文〕

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