Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1400
2
1
gregorian
2021
5
1
20
3
online
1
fulltext
en
Research Article: Effect of feeding level on water quality and plankton community structure in the yellow catfish (Pelteobagrus fulvidraco) rearing enclosure ecosystem
aquaculture
aquaculture
پژوهشي
Orginal research papers
<a name="OLE_LINK19">Four feeding levels (40%, 60%, 80% and 100% of satiation) were designed as the different treatment groups to assess its effects on water quality and plankton community structure in the yellow catfish rearing enclosure ecosystem. The results showed that the weight gain and specific growth rate decreased significantly as the feeding level decreased. The soluble nutrients (except for NO<sub>2</sub>-N) concentrations were significantly affected by the feeding level with the prolonging of rear time. A significant increase in phytoplankton biomass before 9 days was observed in all the treatments, and then decreased significantly until 21 days, while the zooplankton biomass was significantly increased during the entire experiment. Both the phytoplankton and zooplankton biomass were significantly affected by the feeding level. Our results suggested that the increment of nitrogen compounds before 9 or 12 days could be explained by the input of compound diets, while the decrement of nitrogen compounds afterward and phosphorous compounds could be explained by the changes of zooplankton biomass. Based on water quality and plankton structure, moderate nutrient restriction (60%-80% of satiation) is a feasible feeding strategy for better growth performance as well as better water quality and balanced plankton structure. On the other hand, input of moderate phosphorus by dietary supplementation and/or fertilization is necessary in yellow catfish culture both for the better plankton structure and the health of fish. In addition, the polyculture of the minority members of zooplankton filter feeders might be a feasible strategy to control the excessive zooplankton.</a>
Feeding, Water quality, Plankton, Pelteobagrus fulvidraco, Enclosure ecosystem
590
601
http://jifro.ir/browse.php?a_code=A-10-2572-1&slc_lang=en&sid=1
Y.L.
Zhang
zhang_yunlong0912@126.com
100319475328460040280
100319475328460040280
No
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
Y.R.
Mao
100319475328460040281
100319475328460040281
No
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
X.
Ouyang
100319475328460040282
100319475328460040282
No
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
Z.H.
Zhang
100319475328460040283
100319475328460040283
No
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
X.L.
Yao
100319475328460040284
100319475328460040284
No
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
H.L.
Zhang
100319475328460040285
100319475328460040285
No
College of Fishery, Huazhong Agricultural University, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan 430070, China
L.Y.
Wang
437013941@qq.com
100319475328460040286
100319475328460040286
No
College of Fishery, Huazhong Agricultural University, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan 430070, China
Z.B.
Zhao
zzb642201095@163.com
100319475328460040287
100319475328460040287
No
College of Fishery, Huazhong Agricultural University, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan 430070, China
Q.X.
Fan
fanqixue@mail.hzau.edu.cn
100319475328460040288
100319475328460040288
Yes
College of Fishery, Huazhong Agricultural University, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan 430070, China