期刊文献+

减少拥挤对中间球海胆幼胆行为、生长和抗病的影响

Reducing Crowding Interaction Improves Survival,Behavior,Growth and Disease Resistance of Juvenile Sea Urchin Strongylocentrotus intermedius
下载PDF
导出
摘要 正常水温下,将壳径约1.0 cm的中间球海胆(Strongylocentrotus intermedius)幼胆饲养在长19.6 cm×宽16.8 cm×高18.5 cm的饲养箱中,每箱24只,但彼此接触的拥挤程度不同:高拥挤的H组海胆直接放入饲养箱中;中拥挤的M组饲养箱用横隔分为上中下三层,每层放8只幼胆;低拥挤L组的饲养箱在横向隔间的基础上,每层纵向隔间为2×4的24个小隔间,每个小隔间1只海胆。常规相同饲养管理5周时,评估各组海胆的体尺、口器生长、肠重、肠道形态和管足伸出程度。一周后,在每组中随机取10只健康海胆置于饲养箱中,放入3只死于黑嘴病的海胆尸体,连续5天观察、计算每组海胆的患病率与死亡率,研究减少拥挤对中间球海胆幼胆行为、生长和抗病的影响。结果发现,L组海胆的壳径(17.18±1.51)cm和体质量(2.57±0.59)g显著高于H组[壳径(15.53±1.68)cm,体质量(2.01±0.56)g]。L组海胆的肠重(0.14±0.07)g显著高于H组(0.07±0.03)g,且肠道环状皱襞排列整齐,几乎无组织空化,细胞形态正常。这说明低拥挤环境下海胆对食物的消化能力更强,生长更快。L组海胆的发病率(21.25±13.56)%显著低于H组(67.14±14.96)%。本研究表明降低拥挤程度能有效地提高中间育成幼胆的生长速度和抗病性,为高效率海胆中间育成提供新途径。 Juvenile sea urchin Strongylocentrotus intermedius with test diameter of about 1.0 cm were reared in a tank with a length of 19.6 cm ×a width of 16.8 cm × a height of 18.5 cm at stocking density of 24 individuals per tank,with different crowding in contact with each other:in the highly crowded group H,all of the sea urchin was directly placed in the tank;in the medium-crowded group M the tank was divided into upper,middle and lower layers with horizontal partition,in which 8 juveniles were placed in each layer;and in the low-crowded L group the tank with upper,middle and lower layers by a horizontal partition as in the group M was again divided into 24 small compartments by vertical partition of 2 ×4 per layer of longitudinal compartments,one sea urchin per compartment at normal water temperature,and same feeding management for 5 weeks.At the end of the experiment,the body size,lantern growth,gut weight and histological morphology,and tube foot extension of the sea urchins were measured and observed in each group.One week later,10 healthy sea urchin in each group were randomly placed in a tank with three sea urchin died of blackmouth disease for five days to observe and calculate the morbidity and mortality rate of the sea urchins in each group,aiming to evaluate the effects of reducing crowding on the behavior,growth and disease resistance of the sea urchin juveniles.It was found that the sea urchin in group L had significantly larger test diameter of(17.18 ± 1.51) cm and body weight of(2.57 ± 0.59) g than those in group H which test diameter was(15.53 ± 1.68) cm and body weight was(2.01 ± 0.56) g did(P < 0.01).There was significantly higher gut weight in the sea urchin in the group L(0.14 ± 0.07) g than those in the group H(0.07 ± 0.03) g,with intestinal ring folds arranged neatly,and the normal cell morphology,almost without tissue cavitation.This can be explained by the greater food digestion and faster growth rate in the sea urchin in low interactions.This morbidity was significantly reduced in sea
作者 罗嘉 丁鹏 高居杰 李永超 胡方圆 常亚青 赵冲 LUO Jia;DING Peng;GAO Jujie;LI Yongchao;HU Fangyuan;CHANG Yaqing;ZHAO Chong(Key Laboratory of Mariculture and Stock Enhancement in North China’s Sea,Ministry of Agriculture and Rural Affairs,Dalian Ocean University,Dalian 116023,China)
出处 《水产学杂志》 CAS 2024年第1期39-44,共6页 Chinese Journal of Fisheries
基金 国家自然科学基金项目(41506177) 辽宁省海洋经济发展项目[辽自然资发(2022)47号]。
关键词 中间球海胆 中间育成 拥挤 生长 抗病 Strongylocentrotus intermedius intermediate culture crowding interaction growth disease resistance
  • 相关文献

参考文献9

二级参考文献80

共引文献98

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部