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In\nthis experiment, effects of salinity on food conversion rate are observed in order to reduce the\npollution through excess food materials. At the same time, an optimal salinity level within the\nrotifer cultures was estimated based on their food conversion rates and tolerance to higher\nsalinities.\nIn Exp. I, population growth rate and food consumption rate were observed at nine salinity\nlevels within the salinity range of 2 to 40%. The density of marine Chlorella saccharophila used as\nfood for rotifers was maintained within the range of 2×10^\u003c6\u003e to 8×10^\u003c6\u003e cells・ml^\u003c-1\u003e. Culture was\ncontinued for 14 days after rotifers were acclimated to each salinity level. In Exp. II, food\nconsumption rate and percentage of swimming individuals was measured at 0.5, 6, and 25 hours after rotifers were transferred to a higher salinity of 35%. The rotifers used were previously\nacclimated to : 10, 12.5, 15, 20 and 30%. Chlorella density was maintained at about 4×10^\u003c6\u003e\ncells・ml^\u003c-1\u003e.\nIn Exp. I, the highest food conversion rate was obtained at 10%. The conversion rates\nbecame gradually lower as salinity increased and decreased. Sharp decrease in conversion rate\nfrom 56 to 35% was observed between 20 and 25%. In Exp. II, food consumption rates of\nrotifers acclimated to 20 and 30% were higher than 90% of the rotifers acclimated to 35%.\nHowever, those of rotifers at : 10, 12.5, and 15% were less than 50%. As for the percentage of\nswimming individuals, rates higher than 95% were observed at : 15, 20, and 30%. The salinity\nrange between 15 and 20% was estimated as an optimal salinity level. 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シオミズツボワムシの飼育における餌料効率と塩分濃度の関係
http://hdl.handle.net/10232/13318
http://hdl.handle.net/10232/133186d8af10b-2425-4e9b-b93e-953f50c4aa36
名前 / ファイル | ライセンス | アクション |
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AN00040498_v34-1_p37-43.pdf (521.8 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2015-06-08 | |||||
タイトル | ||||||
タイトル | シオミズツボワムシの飼育における餌料効率と塩分濃度の関係 | |||||
タイトルよみ | ||||||
タイトルよみ | シオミズツボワムシ ノ シイク ニオケル ジリョウ コウリツ ト エンブン ノウド ノ カンケイ | |||||
別言語のタイトル | ||||||
その他のタイトル | Effects of Salinity on Food Conversion Rate of Rotifer (Brachionus plicatilis) | |||||
著者 |
山崎, 繁久
× 山崎, 繁久× 平田, 八郎 |
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著者よみ | ||||||
姓名 | ヤマサキ, シゲヒサ | |||||
著者よみ | ||||||
姓名 | ヒラタ, ハチロウ | |||||
別言語の著者 | ||||||
姓名 | YAMASAKI, Shigehisa | |||||
別言語の著者 | ||||||
姓名 | HIRATA, Hachiro | |||||
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 | |||||
要約(Abstract) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The food conversion rate is a valuable indicator for the maintenance of water quality, because food materials other than those used in rotifer production are released into the culture water. In this experiment, effects of salinity on food conversion rate are observed in order to reduce the pollution through excess food materials. At the same time, an optimal salinity level within the rotifer cultures was estimated based on their food conversion rates and tolerance to higher salinities. In Exp. I, population growth rate and food consumption rate were observed at nine salinity levels within the salinity range of 2 to 40%. The density of marine Chlorella saccharophila used as food for rotifers was maintained within the range of 2×10^<6> to 8×10^<6> cells・ml^<-1>. Culture was continued for 14 days after rotifers were acclimated to each salinity level. In Exp. II, food consumption rate and percentage of swimming individuals was measured at 0.5, 6, and 25 hours after rotifers were transferred to a higher salinity of 35%. The rotifers used were previously acclimated to : 10, 12.5, 15, 20 and 30%. Chlorella density was maintained at about 4×10^<6> cells・ml^<-1>. In Exp. I, the highest food conversion rate was obtained at 10%. The conversion rates became gradually lower as salinity increased and decreased. Sharp decrease in conversion rate from 56 to 35% was observed between 20 and 25%. In Exp. II, food consumption rates of rotifers acclimated to 20 and 30% were higher than 90% of the rotifers acclimated to 35%. However, those of rotifers at : 10, 12.5, and 15% were less than 50%. As for the percentage of swimming individuals, rates higher than 95% were observed at : 15, 20, and 30%. The salinity range between 15 and 20% was estimated as an optimal salinity level. The results of this study were aimed at direct application for the seed production of marine fishes. |
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収録雑誌名 |
鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University 巻 34, 号 1, p. 37-43 |
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作成日 | ||||||
日付 | 1985-12-25 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
ISSN | 0453087X | |||||
NII書誌ID(雑誌) | ||||||
収録物識別子タイプ | NCID | |||||
NC ID | AN00040498 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
NDC | ||||||
主題Scheme | NDC | |||||
主題 | 666 | |||||
公開者・出版者 | ||||||
出版者 | 鹿児島大学 | |||||
公開者よみ | ||||||
公開者よみ | カゴシマ ダイガク | |||||
公開者別名 | ||||||
公開者別名 | Kagoshima University |