10.5061/DRYAD.GD844
Canales-Aguirre, Cristian B.
University of Los Lagos
University of Concepción
Seeb, Lisa W.
University of Washington
Seeb, James E.
University of Washington
Cadiz, Maria I.
University of Concepción
Musleh, Selim S.
University of Concepción
Arismendi, Ivan
Oregon State University
Gajardo, Gonzalo
University of Los Lagos
Galleguillos, Ricardo
University of Concepción
Gomez-Uchida, Daniel
University of Los Lagos
University of Concepción
Data from: Contrasting genetic metrics and patterns among naturalized
rainbow trout (Oncorhynchus mykiss) in two Patagonian lakes differentially
impacted by trout aquaculture
Dryad
dataset
2018
Anthropocene
geographic genetic variance
invasion genetics
naturalized rainbow trout
Single nucleotide polymorphisms
Oncorhynchus mykiss
Holocene
effective number of breeders
2018-10-05T00:00:00Z
2018-10-05T00:00:00Z
en
https://doi.org/10.1002/ece3.3574
476985 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Different pathways of propagation and dispersal of non-native species into
new environments may have contrasting demographic and genetic impacts on
established populations. Repeated introductions of rainbow trout
(Oncorhynchus mykiss) to Chile in South America, initially through
stocking and later through aquaculture escapes, provide a unique setting
to contrast these two pathways. Using a panel of single nucleotide
polymorphisms, we found contrasting genetic metrics and patterns among
naturalized trout in Lake Llanquihue, Chile’s largest producer of salmonid
smolts for nearly 50 years, and Lake Todos Los Santos (TLS), a reference
lake where aquaculture has been prohibited by law. Trout from Lake
Llanquihue showed higher genetic diversity, weaker genetic structure and
larger estimates for the effective number of breeders (Nb) than trout from
Lake TLS. Trout from Lake TLS were divergent from Lake Llanquihue, and
showed marked genetic structure and a significant isolation-by-distance
pattern consistent with secondary contact between documented and
undocumented stocking events in opposite shores of the lake. Multiple
factors, including differences in propagule pressure, origin of donor
populations, lake geomorphology, and habitat quality or quantity, may
concomitantly explain contrasting genetic metrics and patterns for trout
between lakes. We also discussed violations of assumptions that may lead
to overestimating Nb . We contend that high propagule pressure from
aquaculture may not only increase genetic diversity and Nb via demographic
effects and admixture, but also may impact the evolution of genetic
structure and increase gene flow, consistent with findings from
artificially propagated salmonid populations in their native and
naturalized ranges.
Genotype Data for Naturalized Rainbow Trout from Lake LLanquihue and Lake
Todos Los Santos (Lake District X Region - Chile)This dataset corresponds
to multilocus genotypes for naturalized rainbow trout from Lake Llanquihue
and Lake Todos Los Santos (Lake District, Chile) screened for 86 single
nucleotide polymorphisms (coded A=1, C=2, G=3, T=4, Missing=0). Each
allele (A1 or A2) is found in a separate column (two columns per SNP
locus). Metadata for sampling location, Lake, Individual ID, Year, Season
(austral winter or spring) are
provided.Canales-Aguirre_etal_2017_Dryad.txt
South America
Lake District X Region
Lake Todos Los Santos
Chile
Patagonia
Lake Llanquihue