文章摘要
基于水声学探测的洪潮江水库鱼类资源空间分布及其与环境因子的相关性
Spatial distribution of fish resources and its correlation with environmental factors in Hongchaojiang Reservoir based on hydroacoustic detection
投稿时间:2019-11-14  修订日期:2020-01-04
DOI:
中文关键词: 空间分布  环境因子  水声学探测  洪潮江水库
英文关键词: Spatial distribution  Environmental factors  Hydroacoustic detection  Hongchaojiang Reservoir
基金项目:广西科技重大专项课题(桂科AA17204095-8)
作者单位E-mail
周磊 华南农业大学海洋学院 zhoulei@scau.edu.cn 
李育森 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室  
施军 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室  
韩耀全 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室  
匡天旭 华南农业大学海洋学院  
吴伟军 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室  
雷建军 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室  
何安尤 广西壮族自治区水产科学研究院广西水产遗传育种与健康养殖重点实验室 heanyou2000@yahoo.com.cn 
摘要点击次数: 406
全文下载次数: 0
中文摘要:
      为了明确洪潮江水库鱼类空间分布格局及其与环境因子的相关性,2018年4月采用回声探测仪(EY60,200khz)对洪潮江水库鱼类资源进行了水声学探测。结果表明,时间尺度上,洪潮江水库鱼类密度昼夜差异不显著(P>0.05),但目标强度均值为白天大于夜间(P < 0.05),昼夜目标强度分别为-43.30 ±0.32 dB和-44.50 ±0.26 dB,主要是由于夜晚-60 dB~-54 dB的小型鱼类增加(-60 ~ -57 dB范围 和-57 ~ -54 dB 范围分别增加9.25%和4.76%),而白天-54~-48dB的鱼类比例增加所致(-54 ~ -51 dB范围和-51 ~ -48 dB范围分别增加7.42%和5.27%)。空间尺度上,洪潮江水库鱼类分布呈现显著的空间变化特征(P < 0.05)。鱼类密度呈现上游密度高于下游、库汊高于库心密度的特征。密度平均值为109. 52 ind/1000 m3,最大值出现在上游S3站点,平均密度为330.21 ind/1000 m3。最小值为下游的S8站点,平均密度为21.50 ind/1000 m3。相关性分析表明,鱼类密度分布与总磷、高锰酸盐指数、叶绿素a呈正相关,与水深呈负相关(P < 0.05);鱼类目标强度与水温、浊度、总磷、高锰酸盐指数呈现显著的负相关(P < 0.05)。可认为洪潮江水库鱼类空间分布是多种非生物因子(如叶绿素a、总磷等)共同作用的结果,其在一定程度上也反映了生物因子(鱼类索饵、逃避敌害等)对鱼类分布的影响。该研究对了解洪潮江水库鱼类资源状况和环境影响因素,以及渔业资源保护与管理具有一定的科学参考价值。
英文摘要:
      In order to understand the fish resources distribution of Hongchaojiang Reservoir and its correlation with environmental factors, the fish resources of the Hongchaojiang Reservoir were evaluated in April 2018 using an echo detector (EY60, 200khz). The results showed that there was no significant difference in the density of fish in the Hongchaojiang Reservoir between day and night(P>0.05), but the mean target strength was greater in the daytime than that in the nighttime (P<0.05). The mean target strength of the day and night was -43.30 ± 0.32 dB and -44.50±0.26 dB, respectively. This is due to the fact that small fish between -60 dB~-54 dB (-60 ~ -57 dB and -57 ~ -54 dB increased by 9.25% and 4.76% respectively) increased during nighttime, while fish -54~-48 dB increased during the daytime (-54 ~ -51 dB and -51 ~ -48 dB increased by 7.42% and 5.27%, respectively). The fish distribution of Hongchaojiang Reservoir showed significant spatial variation (P < 0.05). Fish density is characterized by higher density in the upstream than in the downstream and higher density in Reservoir branch than in the Reservoir center. The average fish density is 109.52 ind/1000 m3. The maximum appeared in the upstream S3 with a density of 330.21 ind/1000 m3. The minimum is in the downstream S8 site with a density of 21.50 ind/1000 m3. Correlation analysis showed that fish density distribution was positively correlated with total phosphorus, permanganate index and chlorophyll a, and negatively correlated with water depth (P < 0.05). Fish target strength showed a significant negative correlation with water temperature, turbidity, total phosphorus and permanganate index (P < 0.05). It is suggested that the spatial distribution of fish in the Hongchaojiang Reservoir is driven by abiotic factors (such as chlorophyll a, total phosphorus, etc.). To some extent, it also reflects the influence of biological factors (fish bait, escape from predators, etc.) on fish distribution. This study provides scientific information for the further understanding of fishery resources in Hongchaojiang Reservoir.
相关附件:   附件1  附件1回复审稿人说明  附件1回复修改意见  附件2图1-4
View Fulltext   查看/发表评论  下载PDF阅读器
关闭