JP6432930B2 - 飼育魚類の脂質含量の低減方法及びそのための飼料 - Google Patents
飼育魚類の脂質含量の低減方法及びそのための飼料 Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
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- Life Sciences & Earth Sciences (AREA)
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Description
コイ科魚類(ゼブラフィッシュ)を用いて、飼育魚類の脂質含量の低減についての実験を行った。コイ科魚類のアミノ酸要求量(表1)に基いて、表2に示すように対照飼料及び試験飼料を作製した。対照区(control)は、飼料配合中、コイ科魚類のアミノ酸要求量のリジン(Lys)を、Lys+区は、15/100(g/g)(アミノ酸要求量のリジンの682%)のリジンを、Lys++区は、20/100(g/g)(アミノ酸要求量のリジンの909%)のリジンを、配合した。これらの飼料を体長約40mm、体重約0.4gのゼブラフィッシュに3及び6日間投与し、飼育した。飼育後、飼育魚類について、「体重」及び「筋肉の脂質含量」を測定した。
結果を、表3及び表4に示す。表3(リジン過剰食を与えたゼブラフィッシュの体重)に示されるように、リジン過剰食を与えたゼブラフィッシュの体重(3及び6日間投与)は、対照群と試験群との間で体重には有意な差が認められなかった。また、筋肉の全脂質を抽出し、トリアシルグリセロールを測定したところ、表4(リジン過剰食を与えたゼブラフィッシュの脂質含量)に示されるように、リジン過剰食を与えた場合に、Dunnett多重検定で有意に脂質含量が低くなった。
サケ科魚類(ニジマス)を用いて、飼育魚類の脂質含量の低減についての実験を行った。ニジマスのアミノ酸要求量(表5)に基いて、表6に示すように対照飼料及び試験飼料を作製した。対照区(control)は、飼料配合中、ニジマスのアミノ酸要求量のリジン(Lys)を、Lys+区は、15/100(g/g)(アミノ酸要求量のリジンの682%)のリジンを、Lys++区は、20/100(g/g)(アミノ酸要求量のリジンの909%)のリジンを、配合した。これらの飼料を、実施例1と同様に、体長約20cm、体重約115gのニジマスに3及び6日間投与し、飼育した。飼育後、飼育魚類について、「体重」及び「筋肉の脂質含量」を測定した。
結果を、表7及び表8に示す。表7(リジン過剰食を与えたニジマスの体重)に示されるように、リジン過剰食を与えたニジマスの体重(3及び6日間投与)は、対照群と試験群との間で体重には有意な差が認められなかった。また、筋肉の全脂質を抽出し、トリアシルグリセロールを測定したところ、表8(リジン過剰食を与えたニジマスの脂質含量)に示されるように、リジン過剰食を与えた場合に、Dunnett多重検定で有意に脂質含量が低くなった。
Claims (5)
- 養殖魚又は漁獲した天然魚の出荷前の飼育期間において、魚種によって生育に必要とされる必須アミノ酸の要求量を含有させた魚類飼育用飼料の必須アミノ酸のうち、リジンの飼料中の含有量を、魚種によって生育に必要とされるリジンの必須アミノ酸としての要求量に対して、650%以上を過剰に配合した魚類脂質低減化用飼料を用いて、飼育する養殖魚又は漁獲した天然魚の出荷前の飼育期間のうち、出荷前の2〜6日の飼育期間、魚類を飼育することを特徴とする飼育魚類の脂質含量の低減方法。
- 魚類脂質低減化用飼料が、魚種によって生育に必要とされるリジンの必須アミノ酸としての要求量に対して、650%以上、1000%以下を過剰に配合した魚類脂質低減化用飼料であることを特徴とする請求項1に記載の飼育魚類の脂質含量の低減方法。
- 飼育魚類の脂質含量の低減が、魚類の筋肉内の脂質含量を、20%以上低下するものであることを特徴とする請求項1又は2に記載の飼育魚類の脂質含量の低減方法。
- 養殖魚又は漁獲した天然魚の出荷前の飼育期間において、魚種によって生育に必要とされる必須アミノ酸の要求量を含有させた魚類飼育用飼料の必須アミノ酸のうち、リジンの飼料中の含有量を、魚種によって生育に必要とされるリジンの必須アミノ酸としての要求量に対して、650%以上を過剰に配合した魚類脂質低減化用飼料を用いて、飼育する養殖魚又は漁獲した天然魚の出荷前の飼育期間のうち、出荷前の2〜6日の飼育期間、魚類を飼育することにより飼育魚類の脂質含量を低減させることを特徴とする、過剰な脂質含量を低減させた魚類の飼育方法。
- 魚種によって生育に必要とされる必須アミノ酸の要求量を含有させた魚類飼育用飼料において、該必須アミノ酸のうち、リジンの飼料中の含有量を、魚種によって生育に必要とされるリジンの必須アミノ酸としての要求量に対して、650%以上を過剰に配合した魚類脂質低減化用飼料を、請求項1に特定する飼育魚類の脂質含量の低減方法において用いることを特徴とする当該魚類脂質低減化用飼料の使用方法。
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JP2014033630A JP6432930B2 (ja) | 2014-02-25 | 2014-02-25 | 飼育魚類の脂質含量の低減方法及びそのための飼料 |
PCT/JP2015/000787 WO2015129213A1 (ja) | 2014-02-25 | 2015-02-19 | 飼育魚類の脂質含量の低減方法及びそのための飼料 |
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