Zayas Cruz, Omar

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    High genetic connectivity and moderate diversity detected in the Common Octopus (Octopus vulgaris) Cuvier, 1797 in Puerto Rico through reduced-representation DNA sequencing
    (2024-05-10) Zayas Cruz, Omar; Schizas, Nikolaos; College of Arts and Sciences - Sciences; Cruz Motta, Juan; Appeldoorn, Richard; Department of Marine Sciences; Medina-Lee, Juan
    Although octopuses are the third most fished marine invertebrate in Puerto Rico, there is a lack of information about this fishery. Here, we present the first small-scale study assessing the genetic diversity and connectivity of O. vulgaris in Puerto Rico. To achieve this, we applied double-digest Restriction-site Associated DNA sequencing, using the restriction enzymes EcoRI and SphI in 43 specimens captured from 10 locations representing 3 geographic regions. We used F-statistics and Bayesian analysis to evaluate over 2,000 polymorphic loci. We found high genetic connectivity (FST= 0.0008, FST=0.005), high nucleotide diversity (π≈0.1), and moderate genetic diversity (HO≈0.255-0.361, HE≈0.258-0.373) between the studied regions. In contrast to our expectations given oceanographic characteristics and distance between the geographic regions, our results suggest the occurrence of a single admixed population of O. vulgaris in Puerto Rico, with no differentiation between the sampled regions. Even though genomics techniques are powerful for inferring population connectivity, researchers should know protocol limitations to retain the most reliable information possible.