We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Reevaluating claims of ecological speciation in Halichoeres bivittatus.
- Authors
Warren, Dan L.; Eytan, Ron I.; Dornburg, Alex; Iglesias, Teresa L.; Brandley, Matthew C.; Wainwright, Peter C.
- Abstract
Allopatry has traditionally been viewed as the primary driver of speciation in marine taxa, but the geography of the marine environment and the larval dispersal capabilities of many marine organisms render this view somewhat questionable. In marine fishes, one of the earliest and most highly cited empirical examples of ecological speciation with gene flow is the slippery dick wrasse, Halichoeres bivittatus. Evidence for this cryptic or incipient speciation event was primarily in the form of a deep divergence in a single mitochondrial locus between the northern and southern Gulf of Mexico, combined with a finding that these two haplotypes were associated with different habitat types ("tropical" vs. "subtropical") in the Florida Keys and Bermuda, where they overlap. Here, we examine habitat assortment in the Florida Keys using a broader sampling of populations and habitat types than were available for the original study. We find no evidence to support the claim that haplotype frequencies differ between habitat types, and little evidence to support any differences between populations in the Keys. These results undermine claims of ecological speciation with gene flow in Halichoeres bivittatus. Future claims of this type should be supported by multiple lines of evidence that illuminate potential mechanisms and allow researchers to rule out alternative explanations for spatial patterns of genetic differences.
- Subjects
FLORIDA Keys (Fla.); GULF of Mexico; BERMUDA Islands; GENETIC speciation; GENE flow; LARVAL dispersal; MARINE fishes; VICARIANCE; HAPLOTYPES
- Publication
Ecology & Evolution (20457758), 2021, Vol 11, Issue 16, p11449
- ISSN
2045-7758
- Publication type
Article
- DOI
10.1002/ece3.7936