巻号一覧
32 巻, 5 号
選択された号の論文の4件中1～4を表示しています
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原著論文
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渡辺 幸三, 八重樫 咲子, 菊池 裕二, 竹門 康弘, 風間 聡, 大村 達夫原稿種別: 原著論文
2009 年 32 巻 5 号 p. 253-258
発行日: 2009年
公開日: 2010/01/09
ジャーナル フリーPopulation connectivity of aquatic organisms is an important factor for sustaining the robustness of metapopulation in a basin-scale as well as for interpreting the properties of respective local populations. We examined the genetic structure of 30 Stenopsyche marmorata (Tricoptera) local populations in 4 catchments in South-Central Miyagi Prefecture, Japan using AFLP markers, and evaluated their dispersal pattern. We constructed a dendrogram using q, and found that 7 populations in headwater were isolated from another area in the basins. Although previous studies on S. marmorata adult flight within streams reported most of the females fly upstream along a watercourse after mating, our results indicated high possibility of non-directional adult dispersal due to wind. The results also suggested a strong potential for DNA polymorphic analysis to enhance understanding of the population connectivity and dispersal patterns of aquatic organisms in a basin scale.抄録全体を表示PDF形式でダウンロード (458K) -
国分 秀樹, 矢持 進原稿種別: 原著論文
2009 年 32 巻 5 号 p. 259-266
発行日: 2009年
公開日: 2010/01/09
ジャーナル フリーThe oxygen consumption rates and gross primary production rates in artificial (with dredged sediment) and natural tidal flats of three types (i.e., estuary, foreshore, and unused wetland) were estimated using light and dark in situ benthic chamber methods. The gross primary production rate correlated with photon flux density and chlorophyll a concentration in the sediment. After the construction of the artificial tidal flat by mixing with dredged sediment, chlorophyll a concentration increased from 15.8 μg · g-1-wet to 28.3 μg · g-1-wet, and the biomass of macrobenthos also increased from 24.0 g · 0.2 m-2 to 109 g · 0.2 m-2. The oxygen consumption and gross primary production rates increased from 0.47 to 1.8 gO2 · m-2 · d-1 and from 1.1 to 1.9 gO2 · m-2 · d-1 respectively.抄録全体を表示PDF形式でダウンロード (703K) -
橋本 温, 森田 重光, 平田 強原稿種別: 原著論文
2009 年 32 巻 5 号 p. 267-272
発行日: 2009年
公開日: 2010/01/09
ジャーナル フリーFluorescence in situ hybridization (FISH) was applied to the specific detection and distinction of Cryptosporidium oocysts by microscopic observation. High fluorescence was observed using the DIAG-CRYR1 probe targeting 18S rRNA partial sequences to distinguish Cryptosporidium spp oocysts from Cryptosporidium parvum HNJ-1 oocysts. Combining FISH with fluorescence antibody staining, DAPI, and differential interference contrast observation was valuable for the easy differentiation of Cryptosporidium oocysts by microscopic observation. Determination of Cryptosporidium variability by FISH was conducted. Heat-inactivated oocysts showed reduced FISH stainability up to 100 hours in both PBS and filtered sewage.抄録全体を表示PDF形式でダウンロード (2855K) -
藤井 暁彦, 道山 晶子, 横山 佳裕, 関根 雅彦原稿種別: 原著論文
2009 年 32 巻 5 号 p. 273-280
発行日: 2009年
公開日: 2010/01/09
ジャーナル フリーWe ascertained that the sedimentation and decomposition of Ulva sp. (Green algae) affect the Manila clam (Ruditapes philippinarum) resources on the basis of the field experiment in the Wajiro tidal flat at Hakata Bay. We also verified the effectiveness of Ulva salvage measures for the preservation of the resources from the calculation of the Ulva growth model.
According to the field investigation of the survival of the Manila clam, it was confirmed that the Manila clam dies when Ulva decomposes under anaerobic condition and sulfides are produced. In 2007, the amount of natural resources of the clam markedly decreased with the decomposition of Ulva. During the sedimentation and decomposition of Ulva, it was found that for the survival of the clam, a net setup on the ground in the shape of a roof is effective. From the result of calculation using Ulva growth model, as well as the quantity of salvage of Ulva, the quantity of decomposed Ulva decreased, when the salvage was started early. It was shown that the early salvage was an effective preservation measure for Manila clam resources.抄録全体を表示PDF形式でダウンロード (680K)
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