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首页> 外文期刊>Aquaculture Research >Evaluation of selected metal nanoparticles on hatching and survival of larvae and fry of Indian major carp, rohu (Labeo rohita)
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Evaluation of selected metal nanoparticles on hatching and survival of larvae and fry of Indian major carp, rohu (Labeo rohita)

机译：选定的金属纳米颗粒对印度主要鲤鱼（Rohu（Labeo rohita）的幼虫和鱼苗的孵化和存活的评估

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Different laboratory synthesized metal nanoparticles viz. Copper oxide (CuO), Zinc oxide (ZnO) and silver doped titanium dioxide (Ag-TiO2) were studied for their effect on hatching and survival of larvae and fry of Indian major carp, rohu, Labeo rohita both in direct application in tank water & coated onto tanks. Among these nanoparticles, CuO and ZnO nanoparticles exhibited highest percentage of hatching in both direct addition (78.0 +/- 3.1% and 78.05 +/- 4.2%, respectively) and coating onto tanks (58.6 +/- 2.1% and 61.2 +/- 2.7%, respectively) at 1mgmL(-1) while least percentage of hatching was recorded in Ag-TiO2 nanoparticles irrespective of its concentration & mode of supplementation. Highest survival of L.rohita fry (50.13 +/- 2.2%) was observed after 15days post hatching in CuO coated tanks followed by ZnO coated tanks (38.6 +/- 2.8%) while least was recorded in Ag-TiO2 coated tanks (22.53 +/- 3.0%). However in control tanks coated with Poly-Urethane base with hardener and uncoated control tanks, the survival was 42.4 +/- 1.2% and 41.36 +/- 1.8% respectively. Further, significantly lower microbial load of water was recorded in CuO nanoparticles coated tanks (1.5x10(10)CFUL(-1)) as compared to uncoated control tanks (1.1x10(16)CFUL(-1)) without affecting water quality parameters. On the other hand, in Ag-TiO2 coated tanks, significantly lower microbial load (1.0x10(6)CFUL(-1)) as compared to uncoated control tanks at 15days post hatching was recorded. However, Ag-TiO2 was toxic to L.rohita larvae & fry both in direct application and coating onto tanks. Considering the beneficial effects of CuO nanoparticle application, it has the scope of being used in a more eco-friendly way in hatchery operations.
机译：不同实验室合成的金属纳米颗粒。研究了氧化铜（CuO），氧化锌（ZnO）和掺杂银的二氧化钛（Ag-TiO2）对直接在罐装水中应用的印度主要鲤鱼，芜湖，Labeo rohita的幼虫和鱼苗的孵化和存活的影响并涂在坦克上。在这些纳米颗粒中，CuO和ZnO纳米颗粒在直接添加（分别为78.0 +/- 3.1％和78.05 +/- 4.2％）和涂覆在水箱上（58.6 +/- 2.1％和61.2 +/-）时，孵化率最高。在1mgmL（-1）时分别为2.7％），而无论其浓度和添加方式如何，在Ag-TiO2纳米颗粒中记录的孵化率均最低。孵化后15天，在CuO涂层的水箱中，其次是ZnO涂层的水箱（38.6 +/- 2.8％），观察到L.rohita鱼苗的最高存活率（50.13 +/- 2.2％），而在Ag-TiO2涂层的水箱中记录的存活率最低（22.53） +/- 3.0％）。但是，在涂有带有硬化剂的聚氨基甲酸乙酯基料的控制罐和未涂覆的控制罐中，存活率分别为42.4 +/- 1.2％和41.36 +/- 1.8％。此外，与未涂覆的对照水箱（1.1x10（16）CFUL（-1））相比，用CuO纳米颗粒涂覆的水箱（1.5x10（10）CFUL（-1））记录的水微生物负荷明显降低，而不会影响水质参数。另一方面，在孵化后15天，与未涂覆的对照槽相比，在用Ag-TiO2涂覆的槽中记录到的微生物负荷（1.0x10（6）CFUL（-1））显着降低。然而，Ag-TiO2在直接施用和涂在鱼缸上时都对罗希塔幼虫和鱼苗有毒。考虑到使用CuO纳米颗粒的有益效果，其在孵化场操作中的使用范围更加环保。

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