French National Agency for Water and Aquatic Environment (Onema), Direction Générale Le Nadar, square Félix Nadar 94300 Vincennes, France.
J Fish Biol. 2011 Dec;79(6):1436-52. doi: 10.1111/j.1095-8649.2011.03084.x. Epub 2011 Sep 9.
Using the electrofishing database of the French National Agency for Water and Aquatic Environment (Onema), the time trends of 48 freshwater fish taxa at 590 sites monitored for at least 8 years from 1990 to 2009 were investigated. The results demonstrated that species richness increased steadily from the beginning of the monitoring period. This is congruent with the finding that the number of species displaying a significant increase in spatial distribution or abundance was greater than those showing a significant decrease. Some species, however, had declined both in occurrence and abundance, e.g. tench Tinca tinca, common bream Abramis brama, brown trout Salmo trutta and European eel Anguilla anguilla. The species showing the most spectacular colonization were non-native, e.g. topmouth gudgeon Pseudorasbora parva, wels catfish Silurus glanis and asp Aspius aspius. The time trends in population density were related to the maximal body size, habitat requirement, occurrence and abundance and the status (i.e. native or exotic) but not to the spawning temperature.
利用法国国家水和环境局（Onema）的电捕鱼数据库，对 1990 年至 2009 年至少 8 年监测的 590 个地点的 48 种淡水鱼类的时间趋势进行了研究。结果表明，从监测开始以来，物种丰富度稳步增加。这与发现的物种数量显示出空间分布或丰度显著增加的数量大于显示出显著减少的数量这一发现一致。然而，一些物种的出现和丰度都有所下降，例如丁鱥 Tinca tinca、鲤 Abramis brama、虹鳟 Salmo trutta 和欧洲鳗 Anguilla anguilla。表现出最壮观的定殖的物种是非本地的，例如圆吻鲴 Pseudorasbora parva、欧洲六须鲶 Silurus glanis 和梭鲈 Aspius aspius。种群密度的时间趋势与最大体型、栖息地要求、出现和丰度以及状态（即本地或外来）有关，但与产卵温度无关。
