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冉多映, 黄琳, 张利君, 刘哲宇, 郑嘉豪, 蒋宏雷, 王志铮. 黑鲷幼鱼同生群内不同增重性能子群间背肌质构和脏器生理的差异[J]. 水生生物学报. DOI: 10.7541/2024.2023.0347
引用本文: 冉多映, 黄琳, 张利君, 刘哲宇, 郑嘉豪, 蒋宏雷, 王志铮. 黑鲷幼鱼同生群内不同增重性能子群间背肌质构和脏器生理的差异[J]. 水生生物学报. DOI: 10.7541/2024.2023.0347
RAN Duo-Ying, HUANG Lin, ZHANG Li-Jun, LIU Zhe-Yu, ZHENG Jia-Hao, JIANG Hong-Lei, WANG Zhi-Zheng. DIFFERENCES IN DORSAL MUSCLE MORPHOLOGY AND ORGAN PHYSIOLOGY AMONG SUBGROUPS WITH DIFFERENT GROWTH PERFORMANCES WITHIN THE COHORT OF JUVENILE BLACK SEABREAM[J]. ACTA HYDROBIOLOGICA SINICA. DOI: 10.7541/2024.2023.0347
Citation: RAN Duo-Ying, HUANG Lin, ZHANG Li-Jun, LIU Zhe-Yu, ZHENG Jia-Hao, JIANG Hong-Lei, WANG Zhi-Zheng. DIFFERENCES IN DORSAL MUSCLE MORPHOLOGY AND ORGAN PHYSIOLOGY AMONG SUBGROUPS WITH DIFFERENT GROWTH PERFORMANCES WITHIN THE COHORT OF JUVENILE BLACK SEABREAM[J]. ACTA HYDROBIOLOGICA SINICA. DOI: 10.7541/2024.2023.0347

黑鲷幼鱼同生群内不同增重性能子群间背肌质构和脏器生理的差异

DIFFERENCES IN DORSAL MUSCLE MORPHOLOGY AND ORGAN PHYSIOLOGY AMONG SUBGROUPS WITH DIFFERENT GROWTH PERFORMANCES WITHIN THE COHORT OF JUVENILE BLACK SEABREAM

  • 摘要: 根据黑鲷(Sparus macrocephalus)幼鱼同生群内不同增重性能子群间背肌质构和脏器生理的差异, 揭示增重性能与机体代谢和取食运动对策与机制间的相关性, 对于精准遴选黑鲷幼鱼优质增殖群体和科学指导黑鲷幼鱼高效集约化养殖具重要现实意义。任选西沪港海区板式网箱养殖的黑鲷同生群幼鱼3000尾, 停食暂养1d后, 按体质量由大到小依次分为A 体质量(8.2±1.5) g, 出现率5%、B 体质量(5.3±0.9) g, 出现率20.6%、C 体质量(3.8±0.6) g, 出现率48.3%、D 体质量(2.4±0.4) g, 出现率21%、E 体质量(1.7±0.5) g, 出现率5.1%等5个子群。在测量并统计背肌质构和脏器质量比例的基础上, 较系统开展了不同增重性能子群间耗氧率、窒息点及鳃组织和内脏相关功能酶活力的差异。结果表明: (1)根据脏器比例性状的聚类特征, 可较清晰地区分本研究所涉及的各个子群; (2)背肌质构性状和耗氧率性状中随增重性能增强呈单调增加的仅为耐咀性和日均耗氧率, 耗氧昼夜节律除C子群呈昼均≈夜均(P>0.05)外, 其余子群均呈夜均>昼均(P<0.05); (3)窒息点水中含氧量随增重性能增强呈阶梯式下降趋势, 其中与E子群窒息点水中含氧量具显著差异(P<0.05)的仅为A、B子群, 呈E>A≈B; (4)内脏淀粉酶、蛋白酶及AKP、ACP和ATP活力随增重性能增强均呈阶梯式下降趋势, SOD、CAT和POD酶活力均呈阶梯式上升趋势, 而脂肪酶和LDH酶活力则均呈先降后升趋势; (5)鳃组织SOD、POD、Na+/K+-ATPase和Ca2+/Mg2+-ATPase酶活力均随增重性能增强呈阶梯式上升趋势, CAT酶活力则呈先降后升趋势。研究结果可为黑鲷生长性能评价体系构建、速生种质发掘和指导速生品种(品系)选择育种提供科学依据。

     

    Abstract: This study investigates the differences in dorsal muscle morphology and organ physiology among subgroups with different growth performances within the cohort of juvenile black seabream (Sparus macrocephalus). The objective is to uncover the connections between growth performance, metabolic strategies, and feeding mechanisms. This information is crucial for accurately selecting high-quality breeding populations of juvenile black seabream and for scientifically guiding efficient and intensive cultivation. A total of 3000 individuals from the same cohort of juvenile black seabream which cultivated in cage culture by Ningbo Xiangshan Harbor Aquatic Seedling Co, Ltd. in the Xi Hu Harbor area were chosen. Following a 1-day fasting period, they were categorized based on body mass into five subgroups: A body mass (8.2±1.5) g, frequency 5%, B body mass (5.3±0.9) g, frequency 20.6%, C body mass (3.8±0.6) g, frequency 48.3%, D body mass (2.4±0.4) g, frequency 21%, and E body mass (1.7±0.5) g, frequency 5.1%. Comprehensive studies were conducted on the differences in oxygen consumption rate, critical oxygen level, and enzyme activity in gill tissues and internal organs based on measurements of dorsal muscle morphology and organ mass ratios. The findings indicate: (1) Subgroups in this study can be distinctly differentiated based on the clustering characteristics of organ ratio traits. (2) Among the traits of dorsal muscle morphology and oxygen consumption rate, only chew resistance and daily oxygen consumption rate showed a monotonic increase with enhanced growth performance. The diurnal rhythm of oxygen consumption for subgroup C was roughly equal during day and night (P>0.05), while for other subgroups, nighttime rates exceeded daytime rates (P<0.05). (3) The critical oxygen level in water exhibited a stepwise decline as growth performance improved, with only subgroups A and B showing significant differences (P<0.05) from subgroup E, following the pattern E>A≈B. (4) Activities of internal organ enzymes such as amylase, protease, AKP, ACP, and ATP displayed a stepwise decline with enhanced growth performance, while SOD, CAT, and POD enzyme activities showed a stepwise increase, and lipase and LHD enzyme activities demonstrated an initial decline followed by an increase. (5) Gill tissue enzyme activities for SOD, POD, Na+/K+-ATPase, and Ca2+/Mg2+-ATPase all exhibited a stepwise increase with enhanced growth performance, while CAT enzyme activity showed an initial decline followed by an increase. The research provides a scientific foundation for constructing growth performance evaluation systems for black seabream, exploring fast-growing germplasm, and guiding the selection and breeding of fast-growing varieties (strains).

     

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