转食和联合投喂对胭脂鱼仔稚鱼生长和消化能力的影响
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西南大学生命科学学院,安琪酵母股份有限公司,西南大学生命科学学院,重庆市万州区水产研究所,西南大学生命科学学院,西南大学生命科学学院,重庆市万州区水产研究所,西南大学生命科学学院,西南大学生命科学学院

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公益性行业(农业)科研专项(201203086)


Effects of early weaning and co-feeding on growth and digestive capacity in larvae of Myxocyprinus asiaticus
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College of Life Science, Southweast University,Angel Yeast Co.,Ltd,,,,,,,College of Life Science, Southweast University

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    摘要:

    为考察转食及联合投喂对胭脂鱼仔稚鱼生长和消化能力的影响,在水温(24 ± 0.5) ℃下,用丰年虫、水蚯蚓、微颗粒饲料和螺旋藻作为开口饵料,按照不同配比共设置8个处理组来投喂出膜后10 d(10 dph)的胭脂鱼开口仔鱼,40 dph后有2组(水蚯蚓组和丰年虫组)继续投喂先前的饵料,其余处理组全部进行转食投喂微颗粒饲料。统计养殖各阶段的成活率,并在30,40,45,55和65 dph取材测量全长、体质量及相关酶的活性。结果如下:①在转食前,各个处理组间的存活率无明显差异,均大于90%,40 dph后进行转食的处理组存活率逐渐下降,在实验结束时未进行转食的丰年虫组、水蚯蚓组成活率明显高于相应的转食组(丰年虫/饲料组、水蚯蚓/饲料组)和其他转食组(P<0.05);②转食对胭脂鱼仔稚鱼的淀粉酶活性没有太大影响,对丰年虫/饲料组仔稚鱼胰蛋白酶活性影响也不大,但能显著影响水蚯蚓/饲料组仔稚鱼的胰蛋白酶活性(P<0.05),对于脂肪酶活性,丰年虫组和水蚯蚓组在40 dph后存在差异,但转食后它们之间的变化趋势接近;③进行联合投喂的2个处理组(丰年虫 + 饲料 + 螺旋藻/饲料组、水蚯蚓 + 饲料 + 螺旋藻/饲料组)相对未进行联合投喂的处理组(丰年虫 + 螺旋藻/饲料组、水蚯蚓 + 螺旋藻/饲料组),在转食前后联合投喂组的体质量和全长均要小于相应的处理组;④2个联合投喂组与相应的处理组在转食后,淀粉酶活性都呈现上升趋势,其中2个联合投喂组的淀粉酶活性在转食后均高于相应的处理组(P>0.05);2个联合投喂组在转食前后胰蛋白酶和碱性磷酸酶活性整体波动趋势不大,但在转食后5 d脂肪酶活性均呈现先下降后上升的趋势。结果表明:丰年虫、饲料和螺旋藻进行联合投喂胭脂鱼仔鱼,并在40 dph时转食饲料是可行的投喂方案,但饲料投喂比例及添加时间还需进一步研究。

    Abstract:

    According to different mixture ratios of four initial feedings [Artemia(Art), Tubifex(Tub), Microparticulate diet (MD) and Spirulina (Spi)], we divided the 10-day-post-hatching (10 dph) larvae into 8 groups at water temperature (24 ± 0.5) ℃ to investigate the effects of early weaning and co-feeding on the growth and digestive capacity of Myxocyprinus asiaticus larvae. There were two groups(Art, Tub) which kept on feeding previous diet and the rest all turned to the microparticulate diet after 40 dph. We recorded the survival rate of each group and measured length, weight and some enzyme activity at different intervals (30, 40, 45, 55 and 65 dph). Results showed that: ① the survival rate of each group performed equally and was greater than 90% before weaning at 40 dph, but the weaned groups gradually decreased after that period. The survival rates of groups (Art, Tub) fed the same diets were significantly higher than those of the corresponding weaning groups (Art/MD, Tub/MD) and the other weaning groups (P<0.05) at the end of experiment. ② Weaning had little effects on the amylase activity of M. asiaticus larvae and the trypsin activity of Art group, but significantly influenced the trypsin activity of Tub group (P<0.05). After 40 dph,there were differences in lipase activity of the Art and Tub groups,but those weaning groups (Art/MD, Tub/MD) had similar trend; ③ The weight and length of these two co-feeding groups (Art + MD + Spi/MD Tub + MD + Spi/MD) were all less than those groups (Art + Spi, Tub + Spi) correspondingly before weaning; ④ The amylase activity of the co-feeding groups and the corresponding groups were all on the rise after weaning, and the co-feeding groups were a little higher than the corresponding groups (P > 0.05). The trends of those two co-feeding groups' trypsin and alkaline phosphatase activity fluctuation were not significant before weaning, but the lipase activity of the co-feeding groups had a special change of descending first, and then ascending on the 5th day after weaning. To sum up, it was a feasible strategy to co-feed M. asiaticus larvae with 3 diets (Art, Spi and MD) and wean on 40 dph, but the ratio and addition time of MD need further study.

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易建华,郭忠娣,刘本祥,于丽娟,蒲德永,颜忠,黄静,王志坚.转食和联合投喂对胭脂鱼仔稚鱼生长和消化能力的影响[J].水产学报,2016,40(2):225~235

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  • 收稿日期:2015-04-26
  • 最后修改日期:2015-09-02
  • 录用日期:2016-01-23
  • 在线发布日期: 2016-03-06
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