放养密度和投喂量对杂交鲶鱼形态和状态因子的影响

O. E. Afia, O. Obot, S. Umanah
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引用次数: 0

摘要

背景和目的:放养密度和投喂量对养殖鲶鱼的产量有影响。形态参数和状态因子是水产养殖中用来评估物种健康状况的工具。材料与方法:因此,针对不同的放养密度和投喂水平,对形态参数和状态因子进行了调查。鱼类饲养在 1 m 3 的防水油布水箱中,水箱容积为 250 L,有五种不同的放养密度:100 尾/0.25 米 3(T1)、75 尾/0.25 米 3(T2)、38 尾/0.25 米 3(T3)、18 尾/0.25 米 3(T4)和 9 尾/0.25 米 3(T5)。实验有三次重复,持续 52 周。投喂水平为 1.0%(FL)和 1.5%(生物量)的商品饲料。所得数据采用方差分析和均值分离及邓肯多范围检验进行统计分析。结果统计分析结果显示,不同放养密度下的特定形态参数存在显著差异(p<0.05),而其他参数则不显著。在 T2 和 1.5%(FL)条件下饲养的杂交鲶鱼的形态参数平均值最高。在 1.0% FL 条件下饲养的 T1 的形态参数值最小。T5 的条件因子(0.77)最佳。结论因此,这项研究表明,75 尾/米 3 的放养密度是饲养杂交鲶鱼并获得最佳生长的最佳密度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stocking Density and Feeding Levels Impacted on Morphometric and Condition Factors of Hybrid Catfish
Background and Objective: Stocking densities and feeding levels have an impact on the production of farmed catfish. Morphometric parameters and condition factors are tools employed in aquaculture to assess the health of a species. Materials and Methods: Hence, the morphometric parameters and condition factors were investigated against different stocking densities and feeding levels. The fish were reared using tarpaulin tanks measuring 1 m 3 in 250 L of water with five different densities: 100 fish/0.25 m 3 (T1), 75 fish/0.25 m 3 (T2), 38 fish/0.25 m 3 (T3), 18 fish/0.25 m 3 (T4) and 9 fish/0.25 m 3 (T5). The experiment had three replicates and lasted for 52 weeks. Feeding was administered at 1.0% feeding level (FL) and 1.5% feeding level biomass with commercial feed. The obtained data were statistically analyzed using analysis of variance and means separation with Duncan’s Multiple Range Test. Results: Results from the statistical analysis revealed significant differences (p<0.05) in specific morphometric parameters among the different stocking densities, while others were insignificant. The hybrid catfish reared at T2 and 1.5% (FL) had the highest mean values for morphometric parameters. The T1 at 1.0% FL recorded the least morphometric values. The best condition factor (0.77) was obtained at T5. Conclusion: This study, therefore, suggested that 75 fish/m 3 stocking density is optimal for raising hybrid catfish and achieving the best growth.
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