Dear MARMAM, On behalf of my co-authors, I am pleased to announce the publication of the following paper:
The long-beaked common dolphin of the eastern Pacific Ocean: Taxonomic status and re-description of Delphinus bairdii Thomas A. Jefferson, Frederick I. Archer, and Kelly M. Robertson Abstract Neritic, long-beaked common dolphins have been described as species distinct from the more oceanic and globally-distributed short-beaked species, Delphinus delphis, although recent molecular studies have challenged this view. In the eastern North Pacific (ENP), the taxonomic status of the long-beaked (bairdii) form has been controversial since its original description in 1873, and has vacillated back and forth between species, subspecies, and geographic forms several times. It is currently provisionally viewed as a subspecies of Delphinus delphis, D. d. bairdii. To clarify this situation, we reviewed the literature and conducted additional analyses using both newly-obtained genetic and cranial morphometric data sets. The results indicate that there are diagnostic differences in skull morphology and coloration between the Eastern Pacific long-and short-beaked forms, and near-perfect diagnosability in mitochondrial DNA. These differences, along with indications of ecological distinctions, including important differences in life history parameters and reproductive timing, indicate that these forms are well on their way down separate evolutionary pathways. As such, we consider them to be distinct species in the Eastern Pacific. The long-beaked species is referable to Delphinus bairdii Dall, 1873, and is re-described as such herein. Mar Mam Sci. 2024;e13133 The paper is open access and can be downloaded here: <https://doi.org/10.1111/mms.13133>. Tom Jefferson _______________________________________________ MARMAM mailing list MARMAM@lists.uvic.ca https://lists.uvic.ca/mailman/listinfo/marmam
