不同喂食量对生物絮团条件下饲养库里巴鱼Prochilodus lineatus的影响

IF 2.2 3区农林科学 Q2 FISHERIES

Aquaculture International Pub Date : 2024-11-05 DOI:10.1007/s10499-024-01749-0

Gleice Kelli Vieira, Jéssica Julian Fernandes Lima, Marilda Ribeiro Soares Davalo, Fúlvia Cristina Oliveira, Marco Shizuo Owatari, Jayme Aparecido Povh, Robson Andrade Rodrigues, Cristiane Meldau de Campos

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引用次数: 0

摘要

本研究评估了在生物絮团（BFT）条件下，不同投喂率对饲养鲃鱼（Prochilodus lineatus）的影响。在生物絮团条件下，将平均体重和长度分别为 27.33 ± 2.07 克和 13.52 ± 0.16 厘米的 160 尾幼鱼随机分布在 16 个实验单元（80 升）中，并采用四种投喂率进行饲养：投喂率分别为鱼类生物量的 1.0%、3.0%、5.0% 和 8.0%，为期 60 天。在试验期间，对水质变量和生物絮团的近似成分进行了监测，并对鱼类的生产性能和血液学进行了评估。与摄入生物量 1.0%的鱼类相比，摄入生物量 5%的鱼类的最终体长（14.47 ± 0.43 厘米）、最终体重（35.55 ± 3.21 克）和体长增量（1.21 ± 0.34 厘米）显著高于摄入生物量 5%的鱼类，而摄入生物量 5.0%和 8.0%的鱼类的增重和特定生长率显著高于摄入生物量 1.0%的鱼类。最终生物量（296.89 ± 18.30 克）方面，摄入生物量 8.0% 的鱼明显高于摄入生物量 1.0% 的鱼（198.30 ± 49.36 克）。饲料转化率（1.74 ± 0.26）方面，饲料转化率为 5.0%的鱼明显低于饲料转化率为 1.0%和 3.0%的鱼。蛋白质效率（- 10.35 ± 5.37%）在生物量为 1.0% 的鱼类中明显下降。生物量为 5.0%的鱼类的存活率（66.32 ± 14.03%）明显低于生物量为 3.0%的鱼类（100.00 ± 0.00%）。生物量为 1.0% 和 3.0% 的鱼的养殖水中溶解氧浓度明显较高。生物量为 8.0%的鱼类养殖水的水中可沉淀固体含量（242.50 ± 181.18）明显高于生物量为 1.0%和 3.0%的组别，而生物量为 5.0%的鱼类养殖水的硬度明显降低。生物质含量为 3.0% 的水体中二氧化碳含量明显高于生物质含量为 5.0% 的水体。关于生物絮团的近端成分，投喂率为 8.0% 的组别干物质含量明显增加（28.58 ± 0.01%），而投喂率为 3.0% 的组别干物质含量最低。粗蛋白含量（28.94 ± 0.01%）在生物量饲喂率为 1.0% 的组别中明显低于生物量饲喂率为 3.0% 的组别。生物量为 8.0% 组的乙醚提取物（1.62 ± 0.00%）明显高于生物量为 3.0% 组。与生物量为 5.0% 和 8.0% 的鱼类相比，生物量为 1.0% 的鱼类单核细胞明显增加。与生物量为 1.0% 的鱼类相比，生物量为 5.0% 的鱼类的中性粒细胞明显增加。摄入生物量为 1.0% 的食物的鱼类血红蛋白明显下降。与生物量为 3.0% 的鱼类相比，生物量为 1.0% 和 8.0% 的鱼类的血细胞比容明显下降。这些结果表明，在生物絮团条件下养殖 P. lineatus 是可行的。考虑到生产性能、血液学和水质，5.0%的生物量投喂率被证明适合本研究采用的实验条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Effect of different feeding rates on the rearing of the curimba Prochilodus lineatus under biofloc conditions

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Effect of different feeding rates on the rearing of the curimba Prochilodus lineatus under biofloc conditions

This study evaluated the effects of different feeding rates on the rearing of the curimba Prochilodus lineatus under biofloc (BFT) conditions. One hundred and sixty juvenile P. lineatus with average weights and lengths of 27.33 ± 2.07 g and 13.52 ± 0.16 cm, respectively, were randomly distributed in 16 experimental units (80 L) under BFT conditions and subjected to four feeding rates: 1.0%, 3.0%, 5.0%, and 8.0% of the fish biomass, for 60 days. During the assay, water quality variables and the proximate composition of the biofloc were monitored, as well as the productive performance and hematology of fish were evaluated. Compared to fish that received the diet at a rate of 1.0% of the biomass, the final length (14.47 ± 0.43 cm), final weight (35.55 ± 3.21 g), and gain in length (1.21 ± 0.34 cm) were significantly higher than those that received 5% of the biomass, while the fish that received 5.0% and 8.0% of the biomass, weight gain, and specific growth rate were significantly higher than those that received 1.0% of the biomass. Final biomass (296.89 ± 18.30 g) was significantly greater in fish that received the diet at a rate of 8.0% of the biomass than those that received 1.0% of the biomass (198.30 ± 49.36 g). The feed conversion rate (1.74 ± 0.26) was significantly lower in fish that received the diet at a rate of 5.0% than those that received 1.0% and 3.0% of the biomass. The protein efficiency (− 10.35 ± 5.37%) decreased significantly in fish in the 1.0% of the biomass. The survival rate of fish was significantly lower in fish from the 5.0% of the biomass (66.32 ± 14.03%) than in fish that received 3.0% of the biomass (100.00 ± 0.00%). The concentration of dissolved oxygen was significantly higher in the culture water of fish that received 1.0% and 3.0% of the biomass. The amount of sedimentable solids in the water was significantly higher in the culture water of fish at 8.0% of the biomass (242.50 ± 181.18) than in the groups of 1.0% and 3.0% of the biomass, while the hardness significantly decreased in the culture water of fish that received a diet at a rate of 5.0% of the biomass. Carbon dioxide was significantly greater in the water of the 3.0% of the biomass than in the 5.0% of the biomass. Regarding the proximal composition of the bioflocs, the dry matter significantly increased in the groups that were fed with a feeding rate of 8.0% (28.58 ± 0.01%), while the lowest contents were observed in the groups that received a feeding rate of 3.0% of the biomass. Crude protein was significantly lower in the groups that received a feeding rate of 1.0% of the biomass (28.94 ± 0.01%) than in the groups of 3.0% of the biomass. Ether extract was significantly greater in the groups of 8.0% of the biomass (1.62 ± 0.00%) than in the 3.0% of the biomass. Monocytes were significantly increased in fish that received a diet at a rate of 1.0% of the biomass compared to fish from the 5.0% and 8.0% of the biomass. Neutrophils were significantly increased in fish that received a diet at a rate of 5.0% of the biomass compared to fish in the 1.0% of the biomass. Hemoglobin was significantly decreased in fish that received a diet at a rate of 1.0% of the biomass. Hematocrit was significantly decreased in fish that received a diet at a rate of 1.0% and 8.0% of the biomass compared to fish from the 3.0% of the biomass. The results suggest that the cultivation of P. lineatus under biofloc conditions could be viable. Considering the productive performance, hematology, and water quality, a feeding rate of 5.0% of the biomass proved to be adequate for the experimental conditions adopted in the study.

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来源期刊

Aquaculture International 农林科学-渔业

CiteScore

5.10

自引率

6.90%

发文量

204

审稿时长

1.0 months

期刊介绍： Aquaculture International is an international journal publishing original research papers, short communications, technical notes and review papers on all aspects of aquaculture. The Journal covers topics such as the biology, physiology, pathology and genetics of cultured fish, crustaceans, molluscs and plants, especially new species; water quality of supply systems, fluctuations in water quality within farms and the environmental impacts of aquacultural operations; nutrition, feeding and stocking practices, especially as they affect the health and growth rates of cultured species; sustainable production techniques; bioengineering studies on the design and management of offshore and land-based systems; the improvement of quality and marketing of farmed products; sociological and societal impacts of aquaculture, and more. This is the official Journal of the European Aquaculture Society.