Optimal Feeding Frequency for Sebastes schlegeli Juveniles

MAO Shuquan, ZOU Mingyu, WANG Chunsheng, SONG Liping, WANG Bingli, XU Peng

doi:10.3969/j.issn.1006-267x.2014.08.045

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 8: 2379 - 2385

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.08.045

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Optimal Feeding Frequency for Sebastes schlegeli Juveniles

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1. Shandong Freshwater Fisheries Research Institute, Jinan 250013, China;
2. Sichuan Agricultural University, Ya'an 625014, China

Received date: 2014-02-28

Online published: 2014-08-13

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Abstract

In order to determine the optimal feeding frequency for Sebastes schlegeli juveniles, the effects of feeding frequency on growth, feed utilization, nutrient components and digestive enzyme activities of Sebastes schlegeli juveniles were studied. Three hundred Sebastes schlegeli juveniles with an average body weight of (5.63±0.17) g were randomly divided into 5 groups with 3 replicates per group and 20 fish per replicate. The fish in the 5 groups had different feeding frequencies which were four meals per day, three meals per day, two meals per day, three meals per two days and one meal per day. The experiment lasted for 60 days. The results showed as follows: with feeding frequency increasing, the weight gain rate, feed intake rate, specific growth rate and feed conversion ratio of juveniles all showed an increasing trend, and the specific growth rate and feed conversion ratio in two to four meals per day groups were not significantly different (P>0.05), but were significant higher than those in three meals per two days and one meal per day groups (P<0.05). The hepatosomatic index and viscerosomatic index in four meals per day group were significantly lower than those in one meal per day group (P<0.05). The moisture content of fish body in one meal per day group was significantly higher than that in two to four meals per day groups (P<0.05), while the crude lipid content in one meal per day group was significantly lower than that in three meals per two days and two to four meals per day groups (P<0.05), and the contents of crude protein and ash of whole fish in four meals per day group were significantly lower than those in one meal per day group (P<0.05). The moisture content of liver in one meal per day group was significantly lower than that in three to four meals per day groups (P<0.05), while the crude lipid content in three meals per two days and one meal per day groups was significantly higher than that in four meals per day group (P<0.05). The activities of pepsin, amylase and lipase in one meal per day group were significantly higher than those in two to four meals per day groups (P<0.05), while the digestive enzymes activities had no significant changes with feeding frequency increasing when feeding frequency was more than two meals per day (P>0.05). Base on a comprehensive consideration of growth performance, feed utilization, nutrient components and digestive enzyme activities, the optimal feeding frequency for Sebastes schlegeli juveniles is two meals per day.

Key words： Sebastes schlegeli; juvenile feeding; frequency; growth; body composition; digestive enzyme

Cite this article

MAO Shuquan, ZOU Mingyu, WANG Chunsheng, SONG Liping, WANG Bingli, XU Peng . Optimal Feeding Frequency for Sebastes schlegeli Juveniles[J]. Chinese Journal of Animal Nutrition, 2014 , 26(8) : 2379 -2385 . DOI: 10.3969/j.issn.1006-267x.2014.08.045

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