Feeding frequency on Lophiosilurus alexandri: performance, hematology, and daily rhythms

IF 1.3 Q3 FISHERIES Journal of Applied Aquaculture Pub Date : 2021-07-10 DOI:10.1080/10454438.2021.1944421

Lucas Pedro Gonçalves Junior, Angélica da Silva Ferreira, I. F. Araujo Torres, W. Silva, L. S. Costa, J. López-Olmeda, N. C. Costa, P. A. Ribeiro, D. C. Costa, R. K. Luz

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引用次数: 3

Abstract

ABSTRACT The aim of the present study was to evaluate the different feeding frequencies on the performance, hematology profile, daily rhythms of glucose and activities digestive enzymes for juvenile Lophiosilurus alexandri. Feeding frequency did not affect survival, final weight, daily weight gain (P > .05). Glucose showed a daily rhythmic variation, with the acrophase in the group F2 located at Zeitgeber Time (ZT) 12.51 h and at ZT 13.33 h in the group F5. The daily rhythms in digestive enzymes were also affected, especially chymotrypsin, whose activity was twofold higher in F5 than F2. Food ratio divided into a higher frequency along the day induces an increase in acid protease and chymotrypsin activities. Different feeding frequencies can influence hematology profile, daily rhythms of glucose and activities digestive enzymes. The production of juvenile L. alexandri can be successfully carried out adopting a feeding frequency of twice a day.

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亚历山大斑鱼的进食频率：表现、血液学和日常节律

摘要本研究的目的是评估不同喂养频率对亚历山大石斑鱼幼鱼的性能、血液学特征、每日葡萄糖节律和消化酶活性的影响。喂食频率不影响存活率、最终体重和日增重（P>0.05）。葡萄糖表现出每日节律性变化，F2组的峰相位于Zeitgeber时间（ZT）12.51小时，F5组的峰期位于ZT 13.33小时。消化酶的日节律也受到影响，尤其是糜蛋白酶，其活性在F5中比F2高两倍。食物比例在一天中划分为较高的频率会诱导酸性蛋白酶和糜蛋白酶活性的增加。不同的喂养频率会影响血液学特征、每日葡萄糖节律和消化酶活性。采用每天两次的饲喂频率可以成功地进行亚历山大乳杆菌的生产。

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来源期刊

Journal of Applied Aquaculture Environmental Science-Ecology

CiteScore

3.20

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0.00%

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期刊介绍： The Journal of Applied Aquaculture is a platform for the sharing of practical information needed by researchers to meet the needs of investors, farm managers, extension agents and policy makers working to adapt aquaculture theory to achieve economic and food security objectives in the real world. The journal emphasizes multi-disciplinary research and case studies that propose financially and logistically viable solutions to observable problems.