Selective water temperature and its seasonal variation for main species fished by light-seine from the southern Taiwan Straits

研究结果表明 :①鱼类对水温具有一定的选择范围 ,随水温的变化 ,鱼类对温度的选择保持与水温变化方向相同的定向变化。暖水种的选择温度比暖温种更偏向高温方向。如果水温上升较快或鱼种原来所适应的水温较低 ,鱼种对温度的选择就会偏向低温方向。②本海域灯围主要捕捞对象在不同月份所选择的水温 ,大多数比该月水温的中间值高 1～ 3℃ ,较多集中在偏高 1～ 2℃。③主要捕捞对象在冬、春季的选择水温为 2 0～ 2 4℃ ,在夏、秋季的选择水温则为 2 6～ 2 9℃。主要鱼种在不同月份中的选择温度变化幅度为 2～ 6℃ ,多数为 3～ 5℃。There is some selective water temperature range in fishes.Fishes keep up the same direction with water temperature variety in temperature selection.The seletive temperature of warm species tends to higher temperature than that of temperate species.If temperature goes up faster or temparature of fish adapted was lower,selective temperature of these fishes tend to lower.Seletive temperature of main species fished is 1-3℃ higher than the median temperature of that month, 1-2℃ higher in the majority of species.Variable range of selective temperature in main species is mainly 2-6℃,3-5℃ .Selective temperature in main species fished is 20-24℃ in winter and spring, 26-29℃ in summer and autumn.福建省水产厅资助!项目 (闽水科 :1998-0 8

Effects of submarine topography and water depth on distribution of pelagic fish community in Minnan-Taiwan bank fishing ground.

根据闽南 台湾浅滩渔场灯光围网信息船 1989～ 1999年的渔捞纪录 ,研究闽南 台湾浅滩渔场海底地形、水深与中上层鱼类群聚的关系 .结果表明 ,渔场地形起伏 ,水深变化大 ,中上层鱼类分布较为密集 ,但各渔区间的分布不均匀 .南北方向上渔获产量分布是由北向南递增 ,东西方向上渔获产量分布是由浅滩两侧向浅滩的南、北中部靠拢 ;中上层鱼类主要分布在海峡南部混合水和海峡暖水区 ,其中心渔场位于上升流终年存在的高盐区 ,同时群聚于海底断裂区和海底隆起边缘区 ;中上层鱼类群聚区或中心渔场随海峡南部混合水和海峡暖水的季节变化而变化 ,不仅与渔场地形、水深有关 ,还与影响海区季风的风向、风力和不同水系强弱有关 ;本渔场中上层鱼类在不同季节群聚水深 ,春、夏季为 30～ 6 0m ,秋、冬季为 4 0～ 80m .According to the fishing record of the light seine information vessel in Minnan Taiwan bank ground during 1989 to 1999, the effects of submarine topography and water depth on distribution of pelagic fish community in Minnan Taiwan bank fishing ground was studied. The results showed that the pelagic fish distributed concentratively, while the submarine topography and water depth varied widely, but in different fishing regions, the distribution of pelagic fishes was uneven. The distribution of fishing yield increased from north to south, and closed up from sides of the bank to south or north in the regions. Pelagic fish distributed mainly in mixed water in the southern Taiwan Strait, and in warm water in the Taiwan Strait. The central fishing grounds were at high salt regions. Close gathering regions of pelagic fish or central fishing ground would be varied with the seasonal variation of mixed water in the southern Taiwan Strait and warm water in the Taiwan Strait.Central fishing ground was not only related to submarine topography and water depth, but also related to wind direction, wind power and various water systems. In the fishing ground, the gathering depth of pelagic fish was 30～60 m in spring and summer, and 40～80m in autumn and winter.福建省水产厅科研基金资助项目 (闽水科 1998 0 8)

A fuzzy distinguishability on species composition similarities of pelagic fishes in different years in the southern Taiwan Strait

根据闽南海区灯光围网作业信息船1989～1998年9180网次渔捞记录资料,应用模糊数学方法,对台湾海峡南部中上层鱼类年间种类组成的相似程度进行模糊识别.结果得出,台湾海峡南部中上层鱼类群聚优势种存在明显的鱼种交替现象,年间种类组成的模糊贴近度变动于0 659～0 923之间,平均为0 791.模糊聚类分析表明,自1992年以来,该海区中上层鱼类种类组成虽已发生一定的变化,但其年间的模糊贴近度总体上仍处于较好的水平.综合分析认为台湾海峡南部中上层鱼类群聚结构较为稳定,资源状况良好,并具有较大的开发利用潜力.A fuzzy mathematical method is used to discriminate the similarities of pelagic fishes landed in the 9 180 hauls by 10 light-seine information vessels in the southern Fujian waters from 1989 to 1998. The results indicate that the dominant species of the communities has an obvious alternation and the fuzzy adjacency of annual species composition varies between 0.659 and 0.923 with an average value of 0.791. The fuzzy clustering analysis indicates that the annual fuzzy adjacency in general remains good although the species composition of the pelagic fishes has changed to a certain degree since 1992. It is concluded that the community structure of pelagic fishes in the southem Taiwan Strait remains relatively stable and the state of fish stocks shows a good potentiality for a larger utilization.福建省海洋与渔业局资助项目(闽水科:1998-08)

Selective water temperature and its seasonal variation for light-seine fishing in southern Taiwan Strait

对 1 98 9～ 1 998年台湾海峡南部渔场生产记录资料分析结果表明 :灯光围网捕捞主要捕捞年适宜水温 1 6 .1～ 30℃ ,年较佳水温 2 0 .1～ 30℃ ,年最佳选择水温 2 1 .1～ 2 9℃ .环境水温过高或过低 ,不利于灯光围网生产 .各季度的选择水温 ,冬季为 2 1 .1～ 2 4℃ ,春季为 2 1 .1～ 2 7℃ ,夏季为 2 6 .1～ 2 9℃ ,秋季为 2 5 .1～ 2 8℃ ;各月选择水温为该月环境水温的中间值至偏高 2℃ ,多数比中间值偏高 1～ 2℃ .选择水温范围的宽幅 3～ 5℃ ;随环境水温升高或降低 ,鱼类对水温选择发生同向、同步的变化 ,是一种渐进的过程 ;在环境水温上升或持续高温 ,温跃层存在、底层低温涌升水强盛的条件下 ,灯光围网的作业效率均受影响 .According to the information of light seine fishing in the southern Taiwan Strait from 1989～1998, the result indicated that annual suitable temperature is 16.1～30℃ for light seine fishing, 20.1～30℃ for annual better temperature, 21.1～29℃ for annual better selective temperature. If water temperature is higher or lower, it is not advantageous to light seine fishing. The selective temperature for light seine is 21.1～24℃ in winter, 21.1～27℃ in spring, 26.1～29℃ in summer and 25.1～28℃ in autumn. In various months selective temperature for fishing is the median temperature in that month or is higher 2℃ than the median temperature, higher 1～2℃ mainly. Variable range of selective temperature is 3～5℃. Fish keep up same direction and range with temperature variety in temperature selection. It is affected by press of temperature and is a progressive process. Fishing efficiency of light seine is affected by water temperature rising, continue higher temperature, larger temperature gradient, thermocline or the strong upwelling with lower temperature in bottom.福建省水产厅资助!项目 (闽水科 :1998 0 8

Report on the advances in Fisheries Engineering and Equipment research in Fujan province

渔业工程与装备是渔业生产现代化水平的重要标志之一,也是推进渔业生产方式转变的重要途径,是现代渔业科技不可或缺的重要组成。本文报道了福建省近年来所涉及的渔业工程与装备学科的发展现状,包括陆基养殖、港湾鱼类及鲍网箱养殖、深水区抗风浪网箱养殖、微孔增氧技术、湿颗粒饲料加工机械、大型网箱养殖安全监控技术、新型锚技术开发、闭式循环活鱼运输船、浮筏式消波堤、人工鱼礁、休闲渔业和风(能)光(太阳能)互补型海水淡化装置等。分析学科目前存在的问题并提出中期发展目标及“十二五“主攻方向。The technical level of Fisheries Engineering and Equipment is one of the most important factors to indicate the modernization of Fisheries.The researches and studies on Fisheries Engineering and Equipment is an indispensable branch of modern fisheries science and is an important measure to change fisheries production mode.Notability progresses have been achieved in researches and studies on Fisheries Engineering and Equipment in Fujian Province since 2000 year.The research advances about the facilities and Equipments and Engineering and their problems existed are reported in this paper.The facilities and engineering reported here include facilities and engineering applied in the land-based sea-farming such as pond and factory;the new cages made of HDPE for culturing fishes and for culturing abalone with new structure for abalone to adsorb;the equipments reported include the machinery for manufacturing the granule of soft feed;the monitor for detecting the escape of fishes in offshore cages;new kind anchors and their anchoring technology;the boats equipped with water circle recycling to transport live fishes;the HDPE raft for the abatement of waves;recreational fisheries and the small dissalting device driven by wind power and solar energy;the technology to increase oxygen in water with mini holes in the pipes which pressure air are pumped etc

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^