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- Title
不同流速对豹纹鳃棘鲈摆尾频率和血液生理的影响.
- Authors
钱振家; 徐金铖; 张成林; 余友斌; 刘 晃
- Abstract
Water flow is one of the important ecological factors that affect the physiology and growth of fish. Studying the stress level changes of Plectropomus leopardus under flow velocity stress, and clarifying the maximum flow velocity that the fish can tolerate, can provide a theoretical basis for the cage culture site selection, intensive flow culture and deep-sea aquaculture working vessel. Taking P. leopardus [Body length (11.38±1.48) cm, body mass (34.71±11.57) g] as the research object, we designed a hydrostatic control group (0 cm·s−1 or 0 BL·s−1, body length·s−1) and three experimental groups (11.4, 22.8 and 34.2 cm·s−1 corresponding to 1, 2 and 3 BL·s−1) by a self-made fish swimming experimental device, so as to explore the effect of 40-min water flow stimulation on its tail beat frequency change, blood glucose, lactic acid and cortisol content in blood. The results show that there was a linear correlation between the tail beat frequency and water velocity. The blood glucose and cortisol levels increased linearly but the lactic acid increased non-linearly with increasing tail beat times. The flow rate over 2 BL·s−1 resulted in a significant increase in the cortisol in P. leopardus blood (P<0.05). When the flow rate reached 3 BL·s−1, lactic acid and blood glucose levels increased significantly (P<0.05). In conclusion, the upper limit of tolerance to flow velocity of P. leopardus was 2 BL·s−1 . When the flow velocity of aquaculture water was higher than 2 BL·s−1, the stress level and metabolic load increased significantly
- Subjects
BLOOD lactate; CORAL trout; FLOW velocity; BLOOD sugar; FISH growth
- Publication
South China Fisheries Science, 2023, Vol 19, Issue 2, p89
- ISSN
2095-0780
- Publication type
Article
- DOI
10.12131/20220153