南海柘林湾—南澳岛海洋牧场渔业资源本底声学评估

发布时间：2018-04-03 06:19

本文选题：海洋牧场　切入点：渔业资源　出处：《水产学报》2015年08期

【摘要】：为掌握南海柘林湾—南澳岛海洋牧场水域渔业资源本底情况,于2011年4月到2012年2月,使用Simrad EY60科学探鱼仪先后于不同月份对其进行了4次调查。调查显示2011年4月,21种评估鱼类总平均数量密度和平均资源量密度分别为2.68×104个/km2和0.73 t/km2;2011年8月,38种评估鱼类总平均资源数量密度和平均资源量密度分别为6.49×104个/km2和0.71 t/km2;2011年11月,33种评估鱼类总平均资源数量密度和平均资源量密度分别为4.14×104个/km2和0.93 t/km2;2012年2月,15种评估鱼类总平均资源数量密度和平均资源量密度分别为1.45×104个/km2和0.36 t/km2。结果表明,4个月资源量密度均不高;11月资源密度和资源量最高;2月资源密度和资源量最低,声学评估种类明显减少。4月积分值主要分布于4~8 m水层;8月积分值于4~14 m水层内分布比较均匀;11月积分值主要分布水层与4月相似,但10 m以深水体所占百分比高于4月;2月积分值主要分布于4~10 m水层,尤其是6~8 m水层。资源密度与水深之间无明显线性关系。各月份调查站点资源密度与SST无明显线性关系。各月份平均丰度密度与SST呈明显线性关系(R2=0.997 4)。各月份平均资源量密度与SST呈一定线性关系(R2=0.287 2)。研究证实声学方法在海洋牧场渔业资源评估过程中表现出良好的效果,推动了声学技术在海洋牧场渔业资源研究领域的发展,为今后我国深入开展海洋牧场渔业资源增殖效果评估研究提供了现实基础和科学依据。
[Abstract]:In order to understand the background of fishery resources in the waters of Zhelin Wan-Nanao Island in the South China Sea, from April 2011 to February 2012, Simrad EY60 Scientific Fish Prospecting instrument was used to investigate the fish resources in different months.The survey showed that the total average quantitative density and average resource density of 21 evaluated fishes in April 2011 were 2.68 脳 104 / km2 and 0.73 t / km2, respectively; in August 2011, the total average quantitative density and average resource density of 38 evaluated fishes were 6.49 脳 104 / km2, respectively.And 0.71 t / km2; in November 2011, the total average resource density and average resource density of 33 species evaluated were 4.14 脳 104 / km ~ 2 and 0.93 t / km ~ (2), respectively; in February 2012, the total average resource density and average resource density of 15 species were 1.45 脳 104 / km ~ (2) and 0.36 t / km ~ (2), respectively.The results showed that the resource density was not high in 4 months, the highest in November and the lowest in February.The types of acoustics assessment are obviously reduced. The integral value in April is mainly distributed in 4m water layer, the integral value in August is more uniform in water layer (4m), and the integral value in November is mainly distributed in water layer similar to that in April.However, the percentage of deep water in 10 m is higher than that in April, and the integral value in February is mainly distributed in 4 ~ 10 m water layer, especially in 6 ~ 8 m water layer.There is no obvious linear relationship between resource density and water depth.There was no significant linear relationship between resource density and SST in each month.The average abundance density of each month was linear with SST.There was a linear relationship between the average resource density and SST in each month.The results show that the acoustic method has a good effect on the assessment of fishery resources in marine rangelands, which promotes the development of acoustic technology in the field of fishery resources research in marine rangelands.It provides a realistic basis and scientific basis for further research on the evaluation of the effect of fishery resources proliferation in marine rangeland in China in the future.
【作者单位】：中国水产科学研究院南海水产研究所;中国水产科学研究院南海水产研究所农业部南海渔业资源环境科学观测实验站;中国水产科学研究院海洋牧场技术重点实验室中国水产科学研究院南海水产研究所;大连海洋大学海洋科技与环境学院;
【基金】：公益性行业(农业)科研专项(201003068) 国家科技支撑计划(2012BAD18B02) 国家财政专项“南海海洋捕捞信息动态采集网络”(2009-2015)
【分类号】：S932.4

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