中国水产科学Issue(3)：577-584,8.DOI:10.3724/SP.J.1118.2013.00577
NaCl盐度和NaHCO3碱度对大鳞鲃幼鱼生长及鳃组织特征的影响
Effects of NaCl and NaHCO3 on growth and gill microstructure in ju-venile Barbus capito
摘要
Abstract
We evaluated the effects of salinity and alkalinity on growth, feeding, and gill microstructure in juvenile Barbus capito. The fish were reared at salinity of 0 (control group), 2.0, 4.0, 6.1, 7.8, 10.0, or 11.9 for 60 d with temperature of 22−25℃. The body length, body weight, and specific growth rate (SGR) of juveniles were signifi-cantly lower in fish held at salinities <6.1 than in those held in salinity >6.1(P<0.05). The maximum final body weight was highest in the fish reared at 2.0. The specific growth rate of weight (SGRW) and feed conversion effi-ciency (FCE) were highest in fish held at 4.0 and lowest in fish held at 11.9. Our results suggest the optimal salin-ity for growth is 1.88, whereas exposure to levels ≥7.8 results in negative effects. Fish were also reared at 10.00, 15.83, 25.10, 39.80, and 63.12 mmol/L NaHCO3. The body weight, length, and the SGR of juveniles reared in water with <25.10 mmol/L NaHCO3were significantly lower than in the remaining groups (P<0.05). The largest final body weight, body length, SGR, SGRW, and FCE were in fish reared at 15.83 mmol/L NaHCO3.The fish reared at 63.12 mmol/L NaHCO3 had the lowest values for all indices. Rearing in water with NaHCO3 levels>39.80 mmol/L had negative effects and the optimal alkalinity for growth was 20.57 mmol/L. Observation of gill microstructure revealed hypertrophy in the chloride cells, and both hypertrophy and edema in the epithelial cells as salinity and alkalinity levels increased, thereby affecting the growth of the fish. In conclusion, the salinity should bebelow 6.1 or the alkalinity should be below 25.10 mmol/L in the Barbus capito larvae culture.关键词
大鳞/NaCl/NaHCO3/生长/鳃/显微结构鲃Key words
Barbus capito/salinity/alkalinity/growth/gill/microstructure分类
农业科技引用本文复制引用
党云飞,徐伟,耿龙武,柏盈盈..NaCl盐度和NaHCO3碱度对大鳞鲃幼鱼生长及鳃组织特征的影响[J].中国水产科学,2013,(3):577-584,8.基金项目
“十二五”科技支撑计划项目(2012BAD25B09) （2012BAD25B09）
中央级公益性科研院所基本科研业务费专项(201007,201108) （201007,201108）
农业部海洋与河口渔业资源及生态重点开放实验室(开-10-06) （开-10-06）
