查询词典 Sciaenidae

Any of various fishes, chiefly of the family Sciaenidae, that make croaking or grunting sounds.

石首鱼任一种主要属于石首鱼科的鱼类，能发出呱呱声或咕哝声

Type genus of the Sciaenidae: croakers.

石首鱼科的一个模式属；石首鱼。

The most of fish species attributed to Sciaenidae.

资源密度指数CPUE呈现年下降趋势。

The discriminant functions of four Sciaenidae species were established, with accuracy of 98.31%-100%(P1) and 98.36%-100%(P2), and average accuracy of 99.46%.

以逐步判别分析方法建立了4种石首鱼的判别函数，判别准确率分别为98.31%~100%(P1)和98.36%~100%(P2)，综合判别率为99.46%。

By recording the underwater sound of red drum (Sciaenops ocellatus, Sciaenidae) and measuring some physical environmental factors, the relationship between the environmental factors and sound periodicity was studied.

石首鱼发声具周期性，因此以全年水下录音的方法来比较不同环境因子对红鼓鱼发声周期性的影响，结果显示日出与日落都会诱发鱼只增加叫声。

The sound producing system of Sciaenidae is consisted mainly of extrinsic sonic muscle and swimbladder. Because female red drum do not have the sonic muscle, the sonic muscle of young red drum appeared when they were three months old and they were male. Young male red drum started to produce audiable sound at seven months old. The weights of sonic muscles and swimbladders increased with body weights.

石首鱼的发声系统以外接发声肌肉及泳鳔为主，由於雌鱼并无发声肌肉，因此红鼓鱼幼鱼在三个月左右出现发声肌肉者为雄鱼，发育的过程中，发声肌肉、泳鳔的重量随年龄增加而增加，然而雄鱼泳鳔的重量增加情形大於雌鱼。

This paper analyzes the compound attractor structure of a new three-dimensional autonomous chaotic system.

分析了一种新的三维自治混沌系统吸引子的复合结构。

ON shut rivals out of their transmission systems and shy away from reinvesting their profits in network improvements.

ON将竞争者挡在了其输送体系之后，并不愿将其收益再投资于网络改建工作。