ZHANG Xiuhong, LI Jitao, WANG Jiajia, WANG Chengwei, QIN Zhen, GE Qianqian, LIU Ping, LI Jian. Effects of long-term saline-alkaline stress on growth and ovary development of Exopalaemon carinicauda[J]. Journal of fisheries of china. DOI: 10.11964/jfc.20220413421
Citation: ZHANG Xiuhong, LI Jitao, WANG Jiajia, WANG Chengwei, QIN Zhen, GE Qianqian, LIU Ping, LI Jian. Effects of long-term saline-alkaline stress on growth and ovary development of Exopalaemon carinicauda[J]. Journal of fisheries of china. DOI: 10.11964/jfc.20220413421

Effects of long-term saline-alkaline stress on growth and ovary development of Exopalaemon carinicauda

  • I In order to investigate the effects of carbonate alkalinity (CA) on the growth and ovary development of the ridgetail white prawn Exopalaemon carinicauda. Three CA gradients of 3 mmol/L (control group), 5 mmol/L and 8 mmol/L were set to culture E. carinicauda for 60 days. Compared effects of different CA stress on the growth performance, tissue structure, enzyme activity and ovary development. The results showed that there was no significant in growth gain, weight gain and survival rate between 5 mmol/L and control group (P>0.05), 8 mmol/L group was significantly lower than control group (P<0.05). Hepatopancreas sections showed that the morphological structure of the lumen was severely deformed in 8 mmol/L group. Gill sections showed that gill filaments were swollen, blood cells swelled, epithelial cells were seriously damaged, and the stratum corneum space was deformed in 8 mmol/L group. Carbonic anhydrase activity in 5 mmol/L group was significantly higher than control group (P<0.05), and Na+/K+-ATPase activity no significant in muscle (P>0.05); There was no significant of carbonic anhydrase in hepatopancreas (P>0.05), and Na+/K+-ATPase activity of 8 mmol/l group was significantly lower than other groups in hepatopancreas (P<0.05). Na+/K+-ATPase activity of two stress groups was significantly higher than control group in gill (P<0.05). Three group ovaries were able to develop, only 3 mmol/l and 5 mmol/L group had E. carinicauda ovary development to stage Ⅲ; ovary sections showed that the arrangement of oocytes in 8 mmol/L group was loose, and the arrangement of surrounding follicular cells was loose and the number was small. To sum up, the E. carinicauda can grow and develop in CA less than 8 mmol/L, but high CA may cause damage to the gills and hepatopancreas, and affecting growth. At the same time, it is speculated that high CA may also affect the development speed of ovaries. This study provides basic data and reference information for the enhancement and cultivation of white shrimps in saline-alkaline water.
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