| 日粮水平对黑鲷幼鱼氮收支的影响 |
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| 引用本文： | 李军,徐世宏,薛玉平.日粮水平对黑鲷幼鱼氮收支的影响[J].海洋与湖沼,1998,29(4):368-373. |
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| 作者姓名： | 李军 徐世宏 薛玉平 |
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| 作者单位： | 中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071，青岛教育学院!青岛，266001 |
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| 基金项目： | 国家自然科学基金!39370542 |
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| 摘 要： | 于１９９４年８－１１月进行４次黑鲷幼鱼摄食－生长实验，平均水温２６．８，２４．４，２０．１和１４．８℃，生次实验分４个日粮水平，分别对单位体重日摄取、粪便氮、氮排泄和氮生长进行测定和估计。
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| 关 键 词： | 黑鲷 氮收支 日粮水平 幼鱼 |
| 收稿时间： | 1996/3/21 0:00:00 |
| 修稿时间： | 1997/6/30 0:00:00 |
EFFECT OF RATION LEVELS ON NITROGEN BUDGET IN JUVENILE BLACK PORGY (SPARUS MACROCEPHALUS) |
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| LI Jun,XU Shi-hong and XUE Yu-ping.EFFECT OF RATION LEVELS ON NITROGEN BUDGET IN JUVENILE BLACK PORGY (SPARUS MACROCEPHALUS)[J].Oceanologia Et Limnologia Sinica,1998,29(4):368-373. |
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| Authors: | LI Jun XU Shi-hong and XUE Yu-ping |
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| Institution: | Institute of Oceanology, The Chinese Academy of Sciences, Qingdao, 266071;Institute of Oceanology, The Chinese Academy of Sciences, Qingdao, 266071;Qingdao Education College, Qingdao, 266071 |
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| Abstract: | Four feeding-growth experiments on juvenile black porgy (Spams macrocephalus) were carried out during August-November in 1994 at a mean seawater temperature of 26.8°C, 24.4°C, 20.l°C and l4.8°C, respectively. The fish, reared in 801 aquarium (pH = 8.0, salinity = 32), were fed Ammodytes personatus at 4 ration levels from starvation to ad libitum. The nitrogen intake, faeces and retention were measured and the nitrogen excretion were calculated using the nitrogen balance equation (CN = FN + UN + GN). The nitrogen intake mg/(g*d)] increased with ration levels (%). Nitrogen faeces mg/(g*d)] also increased with ration levels at 26.8°C and 24.4°C, but a maximum appeared in the second highest ration levels at 20.l°C and l4.8°C. The relationships between the nitrogen excretion and ration levels are similar to those between nitrogen intake and ration levels. At the maximum ration, nitrogen intake, faeces and retention mg/(g*d)] decreased with decreasing temperature and increasing body weight. At starvation the nitrogen excretion mg/(g*d)] changed a little and ranged 1.04-1.41 mg/(g*d).
The nitrogen budget for the black porgy changed with ration levels. The nitrogen excretions as percentage of nitrogen intake are the highest among the components in the nitrogen balance equation, at the maximum rations the nitrogen excretion decreased with decreasing temperature and increasing body weight. The nitrogen excretion (%, nitrogen intake) was positively correlated with ration levels at 26.8°C and 14.8°C. The nitrogen retention (%, nitrogen intake) efficiency decreased with decreasing ration levels, but a maximum appeared at 4.07% of ration level, not the maximum ration, at 24.4°C. At the maximum ration, the nitrogen retention efficiencies changed in the range of 5.81%-34.20%. The nitrogen retention (mg/d) was positively correlated to nitrogen intake (mg/d) and nitrogen absorption (mg/d). |
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| Keywords: | Sparus macrocephalus Nitrogen budget Ration level |
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