Effect of feeding frequency on growth and digestive enzyme activity in Litopenaeus vannamei during the grow‐out phase in biofloc system
Effect of feeding frequency on growth and digestive enzyme activity in Litopenaeus vannamei during the grow‐out phase in biofloc system
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DOI：
10.1111/anu.12880
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发表时间：
2019-06
影响因子：
3.5
通讯作者：
Roberta Cavalcanti Nery;C. B. Costa;F. G. Rodrigues;R. Soares;R. G. D. Bezerra;S. Peixoto
中科院分区：
文献类型：
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作者：
Roberta Cavalcanti Nery;C. B. Costa;F. G. Rodrigues;R. Soares;R. G. D. Bezerra;S. Peixoto
本研究评价了在生物絮体系统中凡纳滨对虾（Litopenaeus vannamei）生长阶段投喂频率的影响。实验包括四个处理，每个处理三个重复，对应于以下饲喂频率：一次（上午8：00），二（上午八时）和下午4点），三（上午8时，中午12点下午4时）每天四次（上午8：00，上午十点中午12点下午4：00）。连续63天监测其生产性能和消化酶活性。在实验结束时，发现每天喂食三次和四次的个体存活率最高。与每天喂食一次和四次的动物相比，每天喂食三次的个体的湿重增加（6.63 g）和特定生长率（3.46%/天）显著更高，但与每天喂食两次的组无显著差异（分别为6.15 g和3.46%/天）。摄食频率对消化酶活性影响不大，但与体重呈负相关。建议在本研究所用条件下，在biofloc系统中的生长阶段，每天三次饲喂L. vannamei。
The present study evaluated the effects of feeding frequency during the grow‐out phase ofLitopenaeus vannameiin biofloc system. The experiment comprised of four treatments with three replicates each, corresponding to the following feeding frequencies: one (8:00 a.m.), two (8:00 a.m. and 4:00 p.m.), three (8:00 a.m., 12:00 p.m. and 4:00 p.m.) and four times a day (8:00 a.m., 10:00 a.m., 12:00 p.m. and 4:00 p.m.). Zootechnical performance and digestive enzyme activity were monitored for 63 days. At the end of the experiment, the highest survival rates were found for the individuals fed three and four times a day. Wet weight gain (6.63 g) and specific growth rate (3.46% per day) of the individuals fed three times a day were significantly higher compared to animals fed one and four times a day, but did not differ significantly to the group fed twice a day (6.15 g and 3.46% per day, respectively). The digestive enzyme activities were not affected by the feeding frequency, but negative correlations were found between these activities and shrimp weight. It is recommended thatL. vannameishould be fed three times a day during the grow‐out phase in a biofloc system under the conditions used in this study.