WEKO3
アイテム
水槽飼育アコヤガイの成長におよぼす収容密度と換水率の影響について
https://fra.repo.nii.ac.jp/records/2009060
https://fra.repo.nii.ac.jp/records/20090609d80fffb-fc9f-4800-ab7c-c3c0fa542625
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-06-27 | |||||
| タイトル | ||||||
| タイトル | 水槽飼育アコヤガイの成長におよぼす収容密度と換水率の影響について | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Effects of the number of animals and the exchange of water on the growth of Japanese pearl oyster in tank culture | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
桑谷, 幸正
× 桑谷, 幸正× 西飯, 保 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 前回の実験では濾過循環式飼育装置を用い，期間中飼育水を交換しないで，各装置の収容貝数をかえてアコヤガイを飼育し，期間中の水質と貝成長量の変化とを調査した。今回の実験では同じ飼育装置を用い，１日１回あるいは２回，飼育水の一部を交換し，同様に各装置の収容貝数をかえて調査を行い，前回の実験結果を併せて，収容貝数，換水率およびそれらによる水質条件と貝の成長量との関係を検討した。 1) 収容貝数および換水率と水質各要因値との関係は，収容貝数が少なければそれだけ，また無換水より換水の場合が水質的にみて良好な値を示す。しかしながら，収容貝数が飼育水の水量に対して著しく少ない場合に，また濾過砂により硝酸化され貝の代謝活動の盛衰により著しく変化するような要因については，一部の例外が認められる。 2) 収容貝数と貝成長量の関係は無換水，１回換水のいずれの場合においても回帰直線をもって示され，しかもそれらの両線は平行関係にあり，収容貝数（N），換水率（X%）および貝の成長量（Wmg，１日当たり水中重量増加量）には一定の関係があると考えられる。両実験に使用した飼育装置においてはつぎの関係式が得られた。 W＝0.261X－1.025N＋9.213 3) 両実験におけるpH値（pH），アルカリ度（A/mN）および貝の成長量（Wmg，１日当たり水中重量増加量）を３変量とする重回帰は１%水準において有意性が認められた。 W＝27.5969pH＋28.2171Al－256.4581 また，これまでに行われた諸実験によれば，これらの値の変化は他の要因の貝の成長に対する阻害作用を増減する可能性がある。したがって調査した６要因のうちpH値とアルカリ度の組み合わせが主として貝の成長を支配したものと推定される。 |
|||||
| 言語 | ja | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The present study has been done to make clear the effect of the number of animals being reared and the exchange of culture water with fresh seawater on the growth of the Japanese pearl oyster, Pinctada fucata (Gould), in tank culture. Forty four healthy one-year-old animals were divided into seven groups of 12, 10, 8, 6, 4, 2 and 2 animals each which were reared in respective rearing apparatus for 63 days. The ammount of culture water of each apparatus was 39 liters. Each group was given rice powder as food at a rate of 30 mg per animal per day. Fifteen liters of the culture water was exchanged with fresh seawater once a day in six apparatus holding 2-12 animals and twice a day in the other apparatus of 2 animals. Chemical analysis of culture water and measurment of under-water weight of animals were made ten times at intervals of one week during the experimental period. From the results obtained in the present experiment and those in a previous experiment (1966. Bull. Natl. Pearl Res. Lab. 11:1208-1333) in which the same apparatus were used and the culture water was kept unexchanged throughout the experimental period, the following discussions are drown: 1) There was a tendency that as the number of animals in rearing apparatus decreased or the exchanging rate of culture water increased, pH value and alkalinity of the culture water increased, while ammonia, nitrite and nitrate contents and C.O.D. decreased. However, a few exceptions were found in such a case that the number of animals was very few to the volume of culture water and in such chemical factors that are nitrified in the filter sand and fluctuate markedly depending on the variety of metabolic activity of the animals. 2) The relation between the number and the growth of animals were expressed in a linear regression in either experiment. These two regression lines run parallel with each other. From these facts it is estimated that a direct and qualitative relationship may be kept among the number of animals (N), exchanging rate of culture water (X%) and growth of animals (W mg., daily increase of under-water weight). The relation was represented by the following expression. W=0.261X-1.025N+9.213 3) The multiple correlation among pH (pH) and alkalinity of culture water (Al mN) and the growth of animals was represented by the following expression and it was significant at the one percent level in Snedecor's F test. W=27.5969 pH+28.2171 Al-256.4581 A possibility is suggested from the results of experiments by several workers that the change of those factors may give some variety to the influences of other chemical factors on the growth of animals. Accordingly, it may be judged that a combination of those factors controlls mainly the growth of animals in tank culture. |
|||||
| 言語 | en | |||||
| 書誌情報 |
ja : 国立真珠研究所報告 en : Bulletin of the National Pearl Research Laboratory 巻 14, p. 1748-1764, ページ数 17, 発行日 1969-05-05 |
|||||
| 出版者 | ||||||
| 出版者 | 国立真珠研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | National Pearl Research Laboratory | |||||
| 言語 | en | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00091717 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | pearl_k_1748 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://jp-pearl.com/wp-content/uploads/2018/07/houkoku014.pdf#003 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本真珠振興会Archive | |||||
