上层鱼类

以初级生产力为基础，应用Steele模式估算台湾海峡及其邻近海域中上层鱼类资源年生产量为169.88×104t。

Based on the primary productivity and Steele ( 1974 ) model , the biomass of the pelagic fish resources are estimated to be 169.88 × 10 4t in the Taiwan Strait and its adjacent waters .

根据中上层鱼类的生态习性，选取网具的最大网目为7m，在网口周长、网线配置和网身形状等方面作了深入探讨的基础上，设计了182m×94.7m绳拖网。

According to the ecological behavior of pelagic fish , the largest mesh of 7m was selected . On the basis of adequate discussion on the mouth perimeter , netting yam attaching and body configuration , a large mesh trawl with 182m × 94.7m in size was designed .

东海区中上层鱼类资源与海表温度关系

Relationship between Pelagic Fishery Resources and Sea Surface Temperature in East China Sea

闽南&台湾浅滩渔场6种中上层鱼类的生殖生物学特性

Characters of Reproductive Biology of Six Pelagic Fishes in Minnan-Taiwan Bank Fishing Ground

中上层鱼类实际年渔获量至今尚未超过其最大可持续开发量。

But , the pelagic fish catches were not attained the MSY in recent years .

1983年夏季渤海上层鱼类生物量的估计

Fish biomass estimates at the upper layer of the Bohai Sea in summer , 1983

黄渤海区中上层鱼类种群变动的初步分析

A preliminary analysis of the population dynamics of pelagic fishes in the Yellow Sea and Bohai Sea

闽南&台湾浅滩渔场六种主要中上层鱼类的脂肪酸研究

Study of fatty acid of muscle oil of six pelagic fish in Minnan Taiwan Bank fishing ground

台湾海峡南部中上层鱼类年间种类组成相似程度的模糊识别

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

把该网的网具性能和作业参数和550目×300毫米拖网做了比较，结果认为该网对捕捞中上层鱼类有良好性能。

This trawl performance is suitable for catching pelagic species in comparison with performance of trawl with 550mesh × 300mm .

结果表明：渔获物以底层鱼类为主，但是中上层鱼类也占有一定的比例；

The results indicated that the demersal fish was the dominant species , but the pelagic fish possesses a definite proportion .

台湾海峡1997～1998年夏汛中上层鱼类中心渔场的变动与表层水温的关系浅析

On the potential relationship of fishing ground position shift with the variability of sea surface temperature in the Taiwan Strait in summers of 1997 and 1998

这种网具能更好地开发利用近底层和中上层鱼类资源。

Using the new type trawl can better exploit and utilize the fish resource both on the sea bottom and in the middle and upper sea water layer .

中上层鱼类有8科、13属、18种。

Of which there are 25 Species , 24 Genus , 16 Families for bottom fishes and 18 Species , 13 Genus and 8 Families for pelagic fishes .

2008年～2010年的鱼类增殖放流及渔获物分析证明，在不施用任何化肥的情况下，放养滤食性上层鱼类，不仅增加了产值，也净化了水体环境。

Fish multiplication releasing and catchment analysis showed that releasing pelagic filter-fish could increase value of output and also purify the water environment in the case of not applying any fertilizer .

文章还提出改进和提高灯光围网作业捕捞技术和自身竞争力，合理引导部分疏目快拖作业参与中上层鱼类资源的开发利用等优化海区捕捞作业结构、合理开发利用海区渔业资源的管理建议。

This paper also put forward a series of management suggestion of optimizing fishing structure and reasonable utilizing the fisheries resources such as to improve and enhance the fishing technology and competitive ability of light seine fishery etc.

中上层鱼类占16.0%，底层、近底层鱼类占84.0%。南海北部大陆架外海区底拖网鱼类资源现存量及可捕量的探讨

The pelagic species accounts for 16.0 % , while the demersal species amounts to 84.0 % . AN EXPLORATION OF THE STOCK AND POTENTIAL HARVEST OF DEMERSAL SPECIES IN THE SEA AREA OFF THE NORTHERN CONTINENTAL SHELF OF THE SOUTH CHINA SEA

不像其它游得更快的小伙伴，比如金枪鱼和鲭鱼这样的上层鱼类，骨鱼在涨潮时钻进泥滩觅食，气囊让它在找食物的路途上呼吸得更轻松。

Unlike its faster friends , the pelagic fishes , such as tuna and mackerel , this fish moves up into mud flats to feed during high tide , and has an air bladder that allows it to breathe easy during these trips .

中层拖网是开发利用中上层鱼类资源的重要工具之一，能否有效实施对拖网作业水层的控制，是实现瞄准捕捞和提高捕捞生产效率的关键。

Midwater trawls are one of the most efficient fishing tools for exploiting pelagic fish resources . It is very important to control the position of the trawl vertically to suit the depth of the fish shoal for aimed trawling and fishing efficiency improvement .

由于银鲳属于中上层鱼类，且分布较分散，集群性较差，受捕捞压力相对较小，但在长期捕捞压力及外部环境变化下，银鲳性成熟提前、生长状况变好。

This may be because it is a pelagic species with disperse distribution , less aggregative and with lower fishing pressure relatively , but it is premature and grows better in the living environment which may be caused by long-term fishing pressure and environment change .

鲐鱼是我国重要的海洋洄游性中上层经济鱼类之一，其鱼肉蛋白质中含大量游离组胺酸且内源性蛋白酶活性较高。

Mackerel is one of the important migration fishes in China , which contains high levels of histidine in protein and endogenous protease with high activity .