Post < Small Fishes

使用管道操作符%>>%简化R指令行

2016102120161025YG

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)...

inside the gut of larval fishes

2016101320170905YG

I have been working on gut contents of larval fishes in Yangtze River estuary for a while. Besides a lot of Cladocera and Copepods, some other creatures occurred unexpectedly, like insects and parasites as below....

矛尾鰕虎和斑尾刺鰕虎仔稚鱼形态鉴别特征

2016092420161024YG

矛尾鰕虎（Chaeturichthys stigmatias）和斑尾刺鰕虎（Acanthogobius ommaturus）是东海近岸常见的两种鰕虎，虽然两者的亲鱼繁殖时间略有差别，但是在最近的一次鉴定中发现两种的仔稚鱼多次同时出现在同一个样品中，给鉴定带来一些麻烦。...

[Trial]Identify fish eggs and larvae by DNA barcode

2016080620170905YG

Three days ago, bored with keep writing down uncountable unidentified spp., I decided to do this. 44 fish specimens including two eggs and 42 larvae were dissected for DNA extracting (Sangon DNA extract kit). All but one specimen were successfully amplified in the following PCR (TaKaRa LA Taq kit)....

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