Data from: Coexistence and origin of trophic ecotypes of pygmy whitefish, Prosopium coulterii, in southwestern Alaskan lake

• Main Authors: Quinn, Tom P., Gowell, Conrad P., Taylor, Eric B., Quinn, T. P., Taylor, E. B.
• Other Authors: Federated Research Data Repository, Dépôt fédéré de données de recherche
• Format: Dataset
• Language: unknown
• Published: Dryad 2012
• Subjects: stable isotopes; Diet Analysis; Prosopium coulterii; phylogeography; Fish; Morphometrics; population genetics; Holocene; Southwestern Alaska; Life sciences; medicine and health care; Other; envir; geo; Pygmy whitefish; Alaska
• Online Access: https://doi.org/10.5061/dryad.7pd82; https://doi.org/10.5683/sp2/ntlqcu; https://doi.org/10.14288/1.0397832

Dryad version number: 1 Version status: submitted Dryad curation status: Published Sharing link: https://datadryad.org/stash/share/qFXvY9M-_W-ivAeu60voNrxY_JJAvf7l8duqSPlizRY Storage size: 129012 Visibility: public Usage notes microsatellite allele frequencies Microsatellite DNA allele frequencies in base pairs April113 Stomach contents proportional diet contents (range from 0 - 1.0) for pygmy whitefish dryad.xls Stable isotope data Stable isotope (C, N) for Chignik Lake pygmy whitefish collected in 2008, 2009 dryad.xls distancesfromlandmarks_dryad linear distances from landmark data for pygmy whitefish collected 2008, 2009 from Chignik Lake Abstract Ecologically, morphologically, and genetically distinct populations within single taxa often co-exist in postglacial lakes and have provided important model systems with which to investigate ecological and evolutionary processes such as niche partitioning and ecological speciation. Within the Salmonidae, these species complexes have been well studied, particularly within the Coregonus clupeaformis-C. laveratus (lake and European whitefish, respectively) group, but the phenomenon has been less well documented in the other whitefish genera, Prosopium and Stenodus. Here, we examined the morphology, feeding biology, and genetic structure of three putative forms of the pygmy whitefish, Prosopium coulterii, that were first reported from Chignik Lake, southwestern Alaska, over 40 years ago. Field collections and morphological analyses resolved a shallow water ( 30 m), low gill raker form, and a deepwater, high gill raker count (> 15 gill rakers) form. The two low gill raker count forms fed almost exclusively on benthic invertebrates (mostly chironomids), while the deepwater, high gill raker count form fed almost exclusively on zooplankton, differences in diet that were also reflected in differences both in δ13C and δ15N stable isotopes. All three forms were characterized by the same major mitochondrial DNA clade that has been associated with persistence in, and ...