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ISSN 2095-1388

主管 辽宁省教育厅

主办 大连海洋大学

温度对摄食配合饲料翘嘴鳜胃排空速率的影响

2023. 温度对摄食配合饲料翘嘴鳜胃排空速率的影响. 大连海洋大学学报, 38(6): 1003-1012. doi: 10.16535/j.cnki.dlhyxb.2023-090
引用本文: 2023. 温度对摄食配合饲料翘嘴鳜胃排空速率的影响. 大连海洋大学学报, 38(6): 1003-1012. doi: 10.16535/j.cnki.dlhyxb.2023-090
WANG Fubao, DONG Junjian, SUN Chengfei, WANG Miao, CHENG Guangzhao, LU Maixin, YE Xing. 2023. Effects of water temperature on gastric evacuation rate of mandarin fish Siniperca chuatsi fed formulated diet. Journal of Dalian Ocean University, 38(6): 1003-1012. doi: 10.16535/j.cnki.dlhyxb.2023-090
Citation: WANG Fubao, DONG Junjian, SUN Chengfei, WANG Miao, CHENG Guangzhao, LU Maixin, YE Xing. 2023. Effects of water temperature on gastric evacuation rate of mandarin fish Siniperca chuatsi fed formulated diet. Journal of Dalian Ocean University, 38(6): 1003-1012. doi: 10.16535/j.cnki.dlhyxb.2023-090

温度对摄食配合饲料翘嘴鳜胃排空速率的影响

  • 基金项目:

    广东省重点领域研发计划项目(2021B0202020001);财政部和农业农村部:国家现代农业产业技术体系资助(CARS-46);中国水产科学研究院基本科研业务费资助(2023TD95)

详细信息
    作者简介:

    汪福保(1982-),男,高级工程师。E-mail:wfb1105@163.com

  • 中图分类号: S 963.73

Effects of water temperature on gastric evacuation rate of mandarin fish Siniperca chuatsi fed formulated diet

  • Fund Project: 广东省重点领域研发计划项目(2021B0202020001);财政部和农业农村部:国家现代农业产业技术体系资助(CARS-46);中国水产科学研究院基本科研业务费资助(2023TD95)
  • 为研究温度对不同规格翘嘴鳜(Siniperca chuatsi)摄食配合饲料后胃排空速率(gastric evacuation rate,GER)的影响,设定3种不同养殖温度(18、25、30 ℃),采用胃含物分析法分别对两种规格翘嘴鳜(89.50 g±10.21 g和246.65 g±11.34 g)胃排空特征进行分析,共测定饱食后9个不同时间点翘嘴鳜胃含物的水分含量、相对湿质量和相对干质量,并采用3种数学模型进行拟合,筛选最佳胃排空模型,以确定养殖翘嘴鳜的最适投喂频率。结果表明:不同养殖温度下,两种规格翘嘴鳜胃含物的水分含量均呈先快速后慢速上升至稳定的趋势,而胃含物的相对干质量则均为持续下降,且下降趋势呈先快速后慢速;同一规格鱼胃含物的相对干质量、相对湿质量与温度呈负相关(18 ℃组>25 ℃组>30 ℃组);不同养殖温度下,除小规格鱼30 ℃组胃含物排空时间为30 h外,其余各组鱼胃含物接近排空或完全排空时间均为48 h;鱼规格对胃含物的相对干质量和相对湿质量有极显著性影响(P<0.01),温度对胃含物水分及相对干质量和相对湿质量也均有极显著性影响(P<0.01);利用胃含物相对干质量进行胃排空模式拟合效果较好,其中指数模型更适合描述翘嘴鳜的胃排空规律;拟合模型计算显示,在18、25、30 ℃温度下,小规格鱼80%干质量的胃排空时间分别为17.43、12.70、9.71 h,大规格鱼则分别为20.40、15.74、13.19 h。研究表明,温度与鱼规格影响翘嘴鳜饱食配合饲料后的胃排空时间,胃排空时间随温度升高而缩短,随鱼规格增大而延长;在实际生产中冬季水温降低,投喂配合饲料的次数应减少至1次/d甚至更低,夏季可适当提高至2~3次/d;相同温度下适当增加小规格鱼投喂次数、减少大规格鱼投喂次数,可获得更好的养殖效果。
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出版历程
收稿日期:  2023-04-23

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