ブリおよびアユ養殖飼料への緑茶抽出物および茶殻の添加効果 Effect of Green Tea Extracts and Green Tea Grounds as Dietary Supplements on Cultured Yellowtail and Ayu
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抄録
緑茶抽出物,茶殻およびセルロースを養魚飼料に添加してブリおよびアユの成長および脂質の蓄積に対する影響を調べた.<br>ブリでは茶殻,緑茶抽出物,セルロース添加区の順に平均体重は対照区に較べ低下したが,脂質含量の低下はさらに大きかった.アユではブリと同順に平均体重の減少がみられたが,脂質蓄積抑制効果は緑茶抽出物添加区のみであった.両魚種ともに,いずれの試験区も肥満度は対照区とかわらなかった.
Yellowtail (<i>Seriola quinqueradiata</i>) and "Ayu" (sweet fish, <i>Plecoglossus altivelis</i>) are most commonly cultured fishes in Japan. Body lipid contents of these cultured fishes are much higher than those of natural fishes because of over supplements of lipids in diets to promote growth. On the other hand, production of canned tea drinks has been increasing for the last few years. Greater parts of tea grounds which is by-products of tea drinks are discarded. In the present study, the effects of green tea extracts and grounds on growth and lipid content in two types of cultured fishes were examined. In yellowtail, the accumulation of body lipids was suppressed by the supplementation of 3.6% green tea grounds and 0.7% green tea extracts in the diets. In Ayu, it was suppressed by the supplementation of 1% green tea extracts in the diets, while the effect of tea grounds were not significant. The fishes cultured by the green tea extracts or tea grounds-supplemented diets were commonly decreased in average body weights, but their condition factors were kept at the same levels as the control.
収録刊行物
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- 日本食品科学工学会誌 : Nippon shokuhin kagaku kogaku kaishi = Journal of the Japanese Society for Food Science and Technology
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日本食品科学工学会誌 : Nippon shokuhin kagaku kogaku kaishi = Journal of the Japanese Society for Food Science and Technology 47(12), 932-937, 2000-12-15
公益社団法人 日本食品科学工学会