Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii

Feng Zhao; Ping Zhuang; Longzhen Zhang; Junli Hou

doi:10.1007/s00343-010-9033-2

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Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii

OriginalPaper | Updated：2023-05-16

- Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii
- Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii
- 海洋湖沼学报（英文） 2010年28卷第3期页码：603-608
- Affiliations：
  
  Key and Open Laboratory of Marine and Estuarine Fisheries Resource and Ecology Ministry of Agriculture East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
- Author bio：
- Funds：
  
  Supported by the National High Technology Research and Development Program of China (863 Program) (Nos. 2004AA603110 and 2008AA10Z227) and the National Natural Science Foundation of China (No. 30490234).
- DOI：10.1007/s00343-010-9033-2
  中图分类号：
- 网络首发：2010-05-20，
  
  纸质出版：2010
- Accepted：
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Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii[J]. 海洋湖沼学报（英文）, 2010,28(3):603-608.

Zhao, F., Zhuang, P., Zhang, L. et al. Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii, ., Chin. J. Ocean. Limnol. 28, 603–608 (2010). https://doi.org/10.1007/s00343-010-9033-2
Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii[J]. 海洋湖沼学报（英文）, 2010,28(3):603-608. DOI： 10.1007/s00343-010-9033-2.

Zhao, F., Zhuang, P., Zhang, L. et al. Changes in growth and osmoregulation during acclimation to saltwater in juvenile Amur sturgeon Acipenser schrenckii, ., Chin. J. Ocean. Limnol. 28, 603–608 (2010). https://doi.org/10.1007/s00343-010-9033-2 DOI：

摘要

Abstract

We evaluated the ability of juvenile Amur sturgeon (Acipenser schrenckii) to osmoregulate and grow in saltwater. Hatchery-reared juveniles (mean weight 106.8 g

5-month old) were transferred from freshwater to 10

and 25 salinity saltwater over a period of 20 d. We measured the growth

serum osmolality

ion concentrations

and Na+/K+-ATPase activity. In addition

we prepared samples of gill tissue to quantify morphological changes in gill ultrastructure. Rearing in up to 25 saltwater for 30 d had no significant effect on growth. Similarly

serum osmolality and ion concentrations were similar to levels reported in other teleosts following acclimation to saltwater. Serum osmolality and Na+

Cl− concentrations increased significantly with the initial increase in salinity. Afterwards

levels tended to stabilize and then decrease. Serum K+ levels did not change during acclimation to saltwater. Gill Na+/K+-ATPase activity increased initially as salinity was increased. However

the activity later decreased and

finally stabilized at 3.7±0.1 μmol Pi/mg·prot·h in 25 saltwater (1.6 times higher than the level in those in freshwater). In fish that were held only in freshwater

the chloride cells were located in the interlamellar regions of the filament and at the base of the lamella. Following acclimation to 25 saltwater for 30 d

the number and size of chloride cells increased significantly. Our results suggest that juvenile Amur sturgeon is able to tolerate

and grow in

relatively high concentrations of saltwater.

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Keywords

references

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