水生生物学报2024，Vol.48Issue(5)：787-798,中插1-中插2,14.DOI:10.7541/2024.2023.0318
下潜养殖系统中不同规格气泡对虹鳟补气效果的影响
DIFFERENT SIZES OF BUBBLES ON AIR SUPPLY OF RAINBOW TROUT IN SUBMERGED CULTURE SYSTEM
摘要
Abstract
Submerged cage culture represents an effective solution to challenges posed by high temperature,typhoon,and fish lice infection in open sea aquaculture.However,it leads to the adverse effects on physostomous fish like salmon such as gas loss in the swim bladder,slow growth,skeletal deformity,and high mortality.In order to investi-gate the effects of different bubbles sizes on the growth,behavior,energy budget,antioxidant capacity and body morphology of submerged rainbow trout(Oncorhynchus mykiss),this experiment established five groups with different aquaculture equipments as follows:the control group(without mesh and air supply device),the no-bubble group(adding mesh for isolation)and the three bubble groups(adding mesh for isolation and three kinds of air stone under the mesh for air supplement,with bubble diameter of 1.02,0.33 and 0.11 cm,respectively).After a 28-day trial,the results showed that the final body weight and specific growth rate of rainbow trout in the large and medium bubble groups were significantly higher than those in the small and no bubble groups.The swim bladder volume and buoyance gene-rated by swim bladders of rainbow trout in the large and medium bubble groups were significantly greater than those in the small and no bubble groups.These indicate that the large and medium bubbles effectively supplemented gas in the swim bladder of rainbow trout and restored its growth.The activities of SOD and CAT of rainbow trout in the bubble group were significantly lower than those in the control group,and MDA and LPO were significantly decreased,indi-cating that the anti-oxidation system of rainbow trout was damaged by diving stress.However,the IBRv2 of the antioxi-dant index of rainbow trout in the large and medium bubble groups was closer to the control group than the small and the non-bubble group,indicating that it could alleviate the negative effects of submerged culture to a certain extent.The body of rainbow trout in the bubble group was more streamlined than that in the control group,with an increased rela-tive area of fin and tail,which may be an improvement measure for rainbow trout to cope with the lack of buo-yancy.In conclusion,the large and medium bubbles are more effective in alleviating the negative buoyage of rainbow trout,probably because the large bubbles are more conducive to being swallowed by the fish and compressed to the swim bladder tube.关键词
气泡/鱼鳔补气/生长/抗氧化能力/形态学/虹鳟Key words
Air bubbles/Air replenishment of swim bladder/Growth/Antioxidant capacity/Morphology/Oncor-hynchus mykiss分类
农业科技引用本文复制引用
李哲坤,周演根,余剑非,董暄,李丽,姚波,高勤峰,董云伟..下潜养殖系统中不同规格气泡对虹鳟补气效果的影响[J].水生生物学报,2024,48(5):787-798,中插1-中插2,14.基金项目
国家自然科学基金(U1906206) （U1906206）
山东省重点研发项目(2021SFGC0701) （2021SFGC0701）
鲁渝科技协作项目(2022LYXZ010)资助[Supported by the National Science Foundation of China(U1906206) （2022LYXZ010）
the Key Research and Development Program Projects in Shandong Province(2021SFGC0701) （2021SFGC0701）
Shandong-Chongqing(Luyu)Science and Technology Collaboration Project(2022LYXZ010)] （Luyu）
