Phytoplankton in Small Irrigation Ponds of Kanzaki District, Hyogo Prefecture
نویسندگان
چکیده
منابع مشابه
Determination of gaseous organic compounds in Hyogo Prefecture, Japan.
The aim of this study was to analyze gaseous organic chemicals (GOCs) of high traffic (Nishinomiya City: 979,987 vehicles/day) and low traffic areas (Miki City: 29,338 vehicles/day) by gas chromatography-mass spectrometry (GC-MS) and to evaluate general environment exposure by PAHs in GOCs. After air sampling using an OMNIPORE membrane filter (< 0.45 microm) and Porapak-QS, sorbents were extrac...
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Sumithion is an organophosphorous pesticide widely used to control tiger bugs in fish larval rearing pond. The present study was aimed to investigate the effects of sumithion on plankton population abundance in aquaculture pond. The experiment was carried out with three treatments, i.e. ponds with no sumithion (T1), ponds with 1.0 ppm sumithion (T2) and those with 2.0 ppm sumithion (T3). The wa...
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Centrocestus armatus is an intestinal parasite belonging to the family Heterophyidae. We developed an apparatus for recovering cercariae and clarified the infection dynamics of this parasite. To clarify the circadian rhythm of cercarial shedding in the summer season, we filtrated 30 l of river water every 2 h for 24 h. Cercariae were first detected between 06:00 and 08:00 h, increased over time...
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ژورنال
عنوان ژورنال: Japanese Journal of Limnology (Rikusuigaku Zasshi)
سال: 1979
ISSN: 0021-5104,1882-4897
DOI: 10.3739/rikusui.40.93