sample id: YRef 8-23 fish: Pseudolaubuca engraulis fish size:17.25mm SL object description: trematoda, commonly seen in Aug. samples, parasitize inside or outside guts of larval fishes....
Continue readingYRef8-22, unidentified target
sample id: YRef 8-22 fish: Pseudolaubuca engraulis fish size: 10.2mm SL object description: size c.a. 1mm, with a membrane with snakeskin grain, cannot figure out whether it’s artificial or part of an organism....
Continue reading长江口伪镖水蚤属(Pseudodiaptomus)桡足类的鉴定笔记
图1 火腿伪镖水蚤 P. poplisa 球状伪镖水蚤(Pseudodiaptomus forbesi)、指状伪镖水蚤(P. inopinus)和火腿伪镖水蚤syn.火腿许水蚤(P. poplisa)属于伪镖水蚤科(Pseudodiaptomidae)、伪镖水蚤属(Pseudodiaptomus),它们是该科在长江口主要出现的种类,并且时常同时出现。鉴定特征依据如下(注:以下方法仅适用于长江口水域):...
Continue reading使用管道操作符%>>%简化R指令行
在分析数据的时候,中间的步骤会在得到最终结果前制造一大堆可能并没有更多用途的变量,管道操作符%>>%可以极大地简化指令。 比如多元分析中一个常用的聚类,就需要以下步骤: library(vegan) my_dist<-vegdist(dat,"bray") my_clust<-hclust(my_dist,"ward.D") plot(as.dendrogram(my_clust),horiz=T)...
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