Meeting Abstract
In this study, we investigated the phylogeographical distribution of a subset of the Caribbean lineage of the Pederson cleaner shrimp, Ancylomenes pedersoni. We focused on the southern range of the Caribbean lineage, which is represented within three sites: Mexico, Honduras, and Panama. The area in which these sites are found was thought to represent one homogenous A. pedersoni population with no genetic structure (Debiases 2015). We employed DDRAD sequencing to obtain a clear resolution of the species distribution. Ipyrad was used to clean data and produce output files. SVDquartets and Maximum Likelihood analysis were used to assess phylogeny and population structure. Adegenet was used to test for a number of populations and relatedness at different levels of structure. Analyses revealed that the three tested sites are indeed panmictic (k=1), but that genetic structuring may be present within two of the sites. This study also shows that gene flow is mostly one-directional—from south to north—and reveals signs of bottlenecking. Further analysis will look at the Caribbean wide lineage of the Pederson Cleaner Shrimp.
