Effects of salinity on survival, feeding behavior and growth of the juvenile swimming crab, Portunus trituberculatus (Miers, 1876)

Jikang Shentu; Yongjian Xu; Zhangni Ding

doi:10.1007/s00343-015-4218-3

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Effects of salinity on survival, feeding behavior and growth of the juvenile swimming crab, Portunus trituberculatus (Miers, 1876)

Updated：2023-05-16

- Effects of salinity on survival, feeding behavior and growth of the juvenile swimming crab, Portunus trituberculatus (Miers, 1876)
- Journal of Oceanology and Limnology Vol. 33, Issue 3, Pages: 679-684(2015)
- Affiliations：
  
  1. School of Marine Sciences / Key Lab of Applied Marine Biotechnology of MOE Ningbo University
  2. Ningbo Academy of Ocean and Fishery
- Author bio：
- Funds：
- DOI：10.1007/s00343-015-4218-3
  CLC：
- Online First：30 January 2015，
  
  Published：2015
- Accepted：
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Shentu, J., Xu, Y. & Ding, Z. Effects of salinity on survival, feeding behavior and growth of the juvenile swimming crab, Portunus trituberculatus (Miers, 1876)., Chin. J. Ocean. Limnol. 33, 679–684 (2015). https://doi.org/10.1007/s00343-015-4218-3
DOI：

Shentu, J., Xu, Y. & Ding, Z. Effects of salinity on survival, feeding behavior and growth of the juvenile swimming crab, Portunus trituberculatus (Miers, 1876)., Chin. J. Ocean. Limnol. 33, 679–684 (2015). https://doi.org/10.1007/s00343-015-4218-3 DOI：

摘要

Abstract

Effect of salinity on survival

feeding behavior and growth of juvenile swimming crab Portunus trituberculatus was investigated under 5 salinity levels of 5

30 and 40. The results show that the crab juveniles fed 2 or 3 times at the salinity 20 and 30

each lasted for about 25 minutes

for a total feeding time of 73.2±22.65 minutes per day. At these salinities

there were significantly higher in the frequency of feeding and in total feeding time than those at lower salinities of 5 and 10. All crab juveniles moulted when reared at a salinity of 20 during the 5 days duration of the experiment

which is significantly higher than those at other salinities. All juveniles survived at salinity 20

and the survivorship was not significantly different from that at 30

but was significantly higher than those at other salinities. The crab juveniles reared at a salinity of 20 had the highest value of food ration of 0.190 8±0.011 3 g/gBW

average body weight gain of 0.796±0.128 g

gain rate of 87%–96%

and food conversion ratio of 1.20±0.09. There was no significant difference in the values found between 20 and 30 but these values were significantly lower than that at the other salinities (P >0.05). Highest activities of digestive enzymes (Amylase

Protease

Lipase) and lowest activities of protective enzymes (SOD

CAT) were also obtained on crab juveniles reared at salinity of 20.

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references

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