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食性指数
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  trophic index
     Based on the recent 50 years two-boats trawl fishing data of some state-owned fisheries companies and recent 7 years single-boat fishing data of some areas in East China Sea, the trophic index(TI) and composition indexs of fishes of two-boats trawl and single-boat trawl were calculated and analyzed, which indicated that TI increased before 1974 and decreased rapidly thereafter, while composition index decreased from the end of 1970s, but SD increased.
     利用收集到的近50年东海主要渔业企业和近7年来主要地区的拖网捕捞分品种渔获量数据,研究计算了双船拖网和单船网板拖网的渔获物食性指数与品种组成指数. 结果表明,1974年前东海鱼类食性指数不断增大,之后开始迅速减小,呈现先升后降趋势.
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  “食性指数”译为未确定词的双语例句
     (3) The pastures which had good palatability in July included Setaria viridis, Chenopodium acuminatum and phragmites australis, the species of indulgence intake and enjoy intake occupied 27 per cent in the total species they picked up.
     (3)在选择性采食特征最明显的7、8月份进行的调查结果表明,7月份嗜食性指数较大的牧草有狗尾草、尖头叶藜和芦苇,嗜食和喜食种类数占采食植物种类数的27%。
短句来源
     Esophagus fistula method and microscopic examination technique were used to analysis the botanical composition, and preference index of forage selected by grazing sheep on alpine pasture.
     利用植物显微技术镜检法和食道瘘管法对放牧绵羊采食的高山草原植物成分与嗜食性指数进行分析。
短句来源
     Among shrub species,the AI of Coriaria sinica(63%) and Cunninghamia lanceolata (45%)were higher than those of Quercus acutissima、Wendlandia uvariifolia Hance. and Cryptomeria fortunei (15%、13% and 12%,respectively).
     在灌木中 ,山羊对马桑和杉木等的喜食程度较高 ,其中马桑的喜食性指数为 63%,而麻栎、水锦树和柳杉仅为 1 5%、1 3%和 1 2 %。
短句来源
     Goats significantly(p<0.05)prefered Miscanthus sinensis and Themeda japonica (Willd.) Tanaka (16% and 12%, respectively)among the grasses,and the AI of Chrysopogon aciculatus (Retz.)
     对于禾草 ,山羊明显喜食芒和黄背草 ( P<0 .0 5) ,喜食性指数分别为 1 6%和 1 2 %。
短句来源
     The fitness of four host plants to striped leaf beetle was quantitatively tested with the selective index (SI) and preference index (PI) , and the index of population trend (I) was used as an important estimate to evaluate the influence of different host plant on the natural population of striped leaf beede.
     应用选择系数和嗜食性指数定量测定了4种寄主植物对黄曲条跳甲的适合度,以种群趋势指数综合评价了4种寄主植物对黄曲条跳甲自然种群增长的影响.
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  相似匹配句对
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     服务质量指数
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     大气污染指数
短句来源
     STUDY ON FOOD OF THE SILVER PHEASANT
     白鹇食性研究
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     Feeding Habits of Macaca mulatta in Taihang Mountains.
     太行山猕猴的食性
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  trophic index
Based on thein situ monitoring data, we also evaluated the eutrophication level of the lakes with modified trophic index method brought by M.
      
The assessment of the water qualitative state for marine waters was performed using an appropriate indicator the Trophic Index (TRIX) according to the Italian legislative framework (Dlgs.
      
A metabolism-based trophic index for comparing the ecological values of shallow-water sediment habitats
      
Multiple regression showed that O2 consumption, chlorophyll a and trophic index were significantly correlated with the oxygen demands.
      
On the other hand, the Rodríguez and Don Carlos streams exhibited significant differences with the El Pescado stream in O2 consumption, trophic index, and chlorophyll a content.
      
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Esophagus fistula method and microscopic examination technique were used to analysis the botanical composition, and preference index of forage selected by grazing sheep on alpine pasture. The results showed that the plant species selected by grazing sheep in October were more than that in July. The preference index varied in different period. The forage preference of grazing sheep in winter was not as strong as that in summer. But to some forage, the preference index were relatively stable.

利用植物显微技术镜检法和食道瘘管法对放牧绵羊采食的高山草原植物成分与嗜食性指数进行分析。结果表明,绵羊在黄草期(10月份)采食植物成分比青草期(7 月份)多,其嗜食性指数在不同时期变幅较大,随着冬季来临,绵羊对草地植物的嗜食性不如青草期强烈,但对某些植物嗜食性是相对稳定的。

A study was conducted on dietary composition and grazing preference of goats on a shrub land in the Three Gorges Region.The results showed that more than 50% of goat's diet on the shrub land was composed of shrubs.The average acceptability index(AI) of shrubs as a main dietary component was significantly(p<0.01)higher than those of grasses and forbs,while the average acceptability index of grasses and forbs were not significantly different.Among shrub species,the AI of Coriaria sinica(63%) and Cunninghamia...

A study was conducted on dietary composition and grazing preference of goats on a shrub land in the Three Gorges Region.The results showed that more than 50% of goat's diet on the shrub land was composed of shrubs.The average acceptability index(AI) of shrubs as a main dietary component was significantly(p<0.01)higher than those of grasses and forbs,while the average acceptability index of grasses and forbs were not significantly different.Among shrub species,the AI of Coriaria sinica(63%) and Cunninghamia lanceolata (45%)were higher than those of Quercus acutissima、Wendlandia uvariifolia Hance.and Cryptomeria fortunei (15%、13% and 12%,respectively).Goats significantly(p<0.05)prefered Miscanthus sinensis and Themeda japonica (Willd.) Tanaka (16% and 12%, respectively)among the grasses,and the AI of Chrysopogon aciculatus (Retz.) Tuin.(13%) was the highest (P<0.05) among the forbs. [WT5”HZ]

在三峡地区灌丛草地研究放牧山羊的日粮组成及其喜食性。结果表明 ,在山羊日粮中 50 %以上由灌木植物组成。山羊对灌木的喜食性指数极显著地高于禾草和杂类草 ( P<0 .0 1 ) ,而对禾草和杂类草喜食性的差异不明显。在灌木中 ,山羊对马桑和杉木等的喜食程度较高 ,其中马桑的喜食性指数为 63%,而麻栎、水锦树和柳杉仅为 1 5%、1 3%和 1 2 %。对于禾草 ,山羊明显喜食芒和黄背草 ( P<0 .0 5) ,喜食性指数分别为 1 6%和 1 2 %。对杂类草中的竹节草喜食性指数为 1 3%。

Based on the recent 50 years two-boats trawl fishing data of some state-owned fisheries companies and recent 7 years single-boat fishing data of some areas in East China Sea, the trophic index(TI) and composition indexs of fishes of two-boats trawl and single-boat trawl were calculated and analyzed, which indicated that TI increased before 1974 and decreased rapidly thereafter, while composition index decreased from the end of 1970s, but SD increased. The results of single-boat trawl also indicated that TI decreased...

Based on the recent 50 years two-boats trawl fishing data of some state-owned fisheries companies and recent 7 years single-boat fishing data of some areas in East China Sea, the trophic index(TI) and composition indexs of fishes of two-boats trawl and single-boat trawl were calculated and analyzed, which indicated that TI increased before 1974 and decreased rapidly thereafter, while composition index decreased from the end of 1970s, but SD increased. The results of single-boat trawl also indicated that TI decreased gradually. Long-term over-fishing of trawl was one of the main reasons of the change of fisheries population structure in East China Sea. All of these showed that there was an over-fishing in East China Sea, and the robust of fisheries population was lower.

利用收集到的近50年东海主要渔业企业和近7年来主要地区的拖网捕捞分品种渔获量数据,研究计算了双船拖网和单船网板拖网的渔获物食性指数与品种组成指数.结果表明,1974年前东海鱼类食性指数不断增大,之后开始迅速减小,呈现先升后降趋势.品种组成指数渔获物对数均值从20世纪70年代后期开始不断下降,标准差则缓慢增大.近7年单拖网渔获物的计算结果也表现出鱼类食性指数的下降趋势.长期拖网过度捕捞是造成东海海洋生态系中渔业资源种群结构变化的重要原因,渔业资源已经过度开发,种群结构稳定性减弱.

 
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