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首页> 外文期刊>Annual Research & Review in Biology >Variation in the Biochemical Constituents during Different Moulting Stages in Green Tiger Shrimp, Peneaus semisulcatus
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Variation in the Biochemical Constituents during Different Moulting Stages in Green Tiger Shrimp, Peneaus semisulcatus

机译:绿老虎对虾不同换羽期生化成分的变化

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摘要

A hallmark of crustacean physiology is the periodic shedding of their old exoskeleton achieved by moulting as an external manifestation of a discontinuous growth process. Crustacean metabolism, reproduction and behavior are all affected by the periodic shedding of the exoskeleton and the characteristics of moulting cycles. There are major gaps in our understanding of moulting patterns of commercially raised shrimp; hence, further investigations on the duration of each moult stage, in-moult cycle and the relationship between biochemical constituents and moult cycling are essentially needed. The present research work was aimed at describing characteristic features and biochemical changes that occur at various stages (A-D) during moulting cycle of the Indian green tiger shrimp Penaeus semisulcatus . Experimental animals (wet weight, 20 ± 2 g) were reared individually in aerated plastic aquaria under normal laboratory conditions (12L: 12D; 28.2oC) and 50% of the water was replaced daily for one month. Animals were provided twice daily with commercial Magnum Scampi feed ad libitum and were observed regularly for moulting by setal development and biochemical analysis in conjunction with established parameters for morphological changes during the moulting cycle. Results showed that muscle protein content peaked during the post-moult stage A (51.23 ± 2.51 mg/g) and gradually declined through the inter-moult and pre-moult stages. Similarly in the hepatopancreas, distinct increase in the total protein content was observed during the post-moult stage B (15.78 ± 0.26 mg/g) and a steady decline was noticed thereafter (p 2-3 both in muscle tissue (28.43 ± 2.98 mg/g) and in hepatopancreas (18.79 ± 1.62 mg/g). A sharp fall in lipid content of muscle tissues was observed in inter-moult stage C (19.54 ± 1.45 mg/g) and a corresponding decline (48.21 ± 3.25 mg/g) was observed in the hepatopancreas. The present study documents and further expands our understanding of the physiological and biochemical changes occurring in P. semisulcatus during four different moulting stages and will provide useful criteria for identifying different stages in the life cycle of this commercially farmed shrimp.
机译:甲壳类动物生理学的标志是通过蜕皮作为不连续生长过程的外部表现而实现的老外骨骼的周期性脱落。甲壳类的新陈代谢,繁殖和行为都受到外骨骼周期性脱落和蜕皮周期特征的影响。我们对商业养殖虾蜕皮方式的理解存在很大差距;因此,基本上需要进一步研究每个换毛阶段的持续时间,换毛周期以及生化成分与换毛周期之间的关系。目前的研究工作旨在描述印度绿虎虾半对虾Penulus semisulcatus换羽周期中各个阶段(A-D)发生的特征和生化变化。将实验动物(湿重20±2 g)在正常实验室条件下(12L:12D; 28.2oC)在充气的塑料水族箱中分别饲养,每天更换50%的水,持续一个月。每天两次向动物提供任意量的商业Magnum Scampi饲料,并定期进行定殖和生化分析,并结合确定的换毛周期形态学参数定期观察换毛。结果表明,肌肉蛋白含量在A期后达到峰值(51.23±2.51 mg / g),并在成虫间和成虫前阶段逐渐下降。同样,在肝胰腺,B期后的总蛋白质含量明显增加(15.78±0.26 mg / g),此后稳定下降(在肌肉组织中均为2-3 28.43±2.98 mg / g)和肝胰腺(18.79±1.62 mg / g)。在换毛期C期,肌肉组织的脂质含量急剧下降(19.54±1.45 mg / g),相应下降(48.21)在肝胰腺中观察到±3.25 mg / g),本研究记录并进一步扩展了我们对在四个换羽期中半硫化斑。发生的生理和生化变化的理解,并将为识别生命周期的不同阶段提供有用的标准这种商业养殖的虾。

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