作　　者： ; (谭乾开）;

机构地区： 广东省恩平市农业技术推广服务中心广东恩平市529400

出　　处： 《生态学报》 2006年第8期2749-2756,共8页

摘　　要： 分别就形态、生态和病理学性状对处于脆化终极阶段（LD50≥6．67kg／kgbw）的草鱼与普通草鱼进行比较分析。高度脆化的草鱼在生态学上出现明显变化，体长和体重的指数方程W=al^n显著不同于普通草鱼，DO阈值由平均值O．54mg／L上升到平均值1．68mg／L，CO2麻醉浓度（呼吸抑制值）由194mg／L高浓度下降到52．42～65．36mg／L，Root效应及Broh效应显著改变。解剖分析表明，草鱼脆化过程是渐进性组织病变的生理过程，包括各系统器官的功能性病变，最终使过度脆化的草鱼由于血液循环障碍直接导致死亡。草鱼脆化死亡具有明显的饲料（蚕豆）累积剂量——效应反应的毒理学规律，脆化草鱼的体长与体重的指数方程W=18．1719L^2.4360可作为华南地区商品脆肉鲩标准的参考。研究结果将为脆化草鱼规模化集约养殖和提高脆化草鱼长途运输成活率提供参考。 The pathological conditions of the last transitional phase （LDso ≥6.67kg/kg bw） to the the crisped grass carp and the common grass carp were compared. The length-weight relationships are significantly different between the two fish groups. The average dissolved oxygen concentration threshold increased from 0.54 to 1.68mg/L, and the threshold concentration of CO2 for （decompensation） decreased from 194 to 52.42 - 65.36 mg/L when common carp changed to the last transitional phase. Both Broh and Root effects also changed significantly. Histological examination shows that the change from the common Grass Carp to criped Grass Carp is a gradual process with changes in uhrastructural organization and cytochemical development of all the systems. The major reason that leads excess crisped Grass Carp to death is the blockage of blood circulation system. The toxicological effect of feeding Viciafaba L. to the fish was investigated. Results of the present study are valuable for improving the intensive production and long-distance transportation survivorship of the crisped Grass Carp.

关 键 词： 脆化草鱼 蚕豆病理生理 生态学变异

领　　域： [农业科学] [农业科学]