NDLI: Compensatory growth of Chinese shrimp, Fenneropenaeus chinensis following hypoxic exposure

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Compensatory growth of Chinese shrimp, Fenneropenaeus chinensis following hypoxic exposure

Content Provider	Springer Nature Link
Author	Wei, Liu Zhi Zhang, Xiu Mei Li, Jian Huang, Guo Qiang
Copyright Year	2007
Abstract	Compensatory growth following stress is a strategy aquatic animals use to adjust themselves to a variable environment. Studies on the recovery growth of aquatic animals are not only of theoretical value in ecophysiology and evolution, but also important to applications in aquaculture and fisheries resource management. In this experiment, juvenile Fenneropenaeus chinensis with an initial average body weight of about 3.72 g were exposed to hypoxic water (about 2.08 and 3.11 mg/l of dissolved oxygen (DO) content) for 10 days and then switched to normoxic water (about 5.63 and 5.59 mg/l DO). Compared with juveniles in normoxia, juveniles in the hypoxia period allocated a greater proportion of energy to metabolism and exuviations but allocated less energy to daily metabolism per gram shrimp weight (J/g/day). This reduced feed conversion efficiency and feeding rate. Finally, F. chinensis suffered growth depression. The juveniles completely compensated for hypoxia-induced growth depression in 30 days after being switched into normoxic water and the compensation was achieved mainly by hyperphagia and slightly by improvement of feed conversion efficiency. During the recovery period the hypoxic-stressed shrimp showed higher daily metabolic energy (J/g/day) than controls (P < 0.05). Which means the stressed shrimp had more energy for feeding-related activities. So hyperphagia was observed. Energy analysis indicated that F. chinensis improved feed-conversion efficiency mainly by reducing the percentage of energy lost in feces and exuviations. The results showed that short-term non-lethal hypoxia would not affect the growth of juvenile F. chinensis if there were enough time for the stressed shrimp to recover. This suggested F. chinensis was capable of adapting to DO fluctuation to some extent and short-term non-lethal hypoxia would not have an obvious effect on natural, released, and cultured shrimp stock.
Starting Page	455
Ending Page	470
Page Count	16
File Format	PDF
ISSN	09676120
Journal	Aquaculture International
Volume Number	16
Issue Number	5
e-ISSN	1573143X
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-01-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Compensatory growth Energetics Fenneropenaeus chinensis Hyperphagia Hypoxia Zoology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Agronomy and Crop Science

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