Sandra Ferrada-Fuentes

University of Concepción · Departamento de Oceanografía

Species that occur in low abundances and that are morphologically similar to the target fish are often undetectable infisheries hauls; however, they add to the catch statistics of the target species. Using mitochondrial DNA and phylogenetic approacheswe identified 6 individuals of the species Xenobrama microlepis in a haul targeting the southern Ra...

Previous studies of population genetic structure in Dissostichus eleginoides have shown that oceanographic and geographic discontinuities drive in this species population differentiation. Studies have focused on the genetics of D . eleginoides in the Southern Ocean; however, there is little knowledge of their genetic variation along the South Ameri...

Microsatellite genotypes for Disosstichus eleginoides Contains original individual genotypes in GENALEX format.

Details of parameters of genetic variability for each sample location and locus in Dissostichus eleginoides

Details of percentage of putative migrants and most likely origin area

Graphs of allelic frequencies by cluster Blue bar correspond to South American Cluster (SAC) and red bar correspond to South of Georgia Cluster (SGC).

Null allele frequency using Brookfield 1 formulae

Correlation between standardized genetic distances (FST∕1 − FST) and the logarithm of the geographic distance (km) among sampling sites (A) all possible pairwise combinations (in red SGI), and (B) pairwise excluding South Georgia Island samples.

Principal Component Analysis (PCA) of sampled locations of the D. eleginoides Plot of the first two principal components calculated on the genotypic dataset. NP, Northern Peru; SP, Southern Peru; IQ, Iquique; GP, Gulf of Penas; PW, Puerto Williams; DRI, Diego Ramírez Islands; FI, Falkland Islands; SGI, South Georgia Island.

The Patagonian sprat, Sprattus fuegensis, is a small pelagic marine fish that inhabits the continental shelf along the coasts of Chilean Patagonian and Argentina, a distribution that was highly impacted during the Last Glacial Maximum (LGM). In order to identify how the LGM played a role on the current observed genetic diversity and population stru...

Schematic map of horizontal water circulation in different depth layers, including sample locations. A) surface layer (0–~30m); B) intermediate layer (~30–~150m); and C) deep layer (~150 m to bottom of the sea). Image modified from Sievers and Silva [15]. Sample locations in black dots. (EPS)

Bayes factor comparison among different models incorporated in STRUCTURE and GENELAND software. AdUn: admixture and uncorrelated model, AdCo: admixture and correlated model, NAdUn: no admixture and uncorrelated model, NAdCo: no admixture and correlated model. (DOCX)

The standardized measure of population differentiation F'ST under the diagonal and DST above the diagonal. (DOCX)

Sum of posterior probabilities of models that include a given factor. GESTE analyses included all 6 factors. Bold value indicates the two highest factor scores. (DOCX)

Relative contribution of each environmental variable tested using Akaike’s information criterion. Phos: Phosphate, Lat: Latitude, Long: Longitude, Nit: Nitrate, Oxy: Oxygen, Sal: Salinity, Tem: Temperature. Ave: average, Rang: Range, Max: Maximum, Min: Minimum. Bold values show significant p-values. Variable kept means environmental variables that...

Pearson coefficient per each environmental variable tested. Bold values show the correlation coefficient between environmental variables kept in the RDA analysis. (DOCX)

Dataset of loci microsatellites used in this study. (XLSX)

Environmental variables used in our analyses. Ave: average, Rang: Range, Max: Maximum, Min: Minimum. (DOCX)

Cluster number by GENELAND assigned to each locus based on posterior probability density and assignment of each location to cluster found per locus. (DOCX)

Plots to estimate the best number of genetic clusters. A) Evanno et al. [88] plot for detecting the number of K groups that best fit the data. B) Plot of the mean likelihood L(K) and variance per K value from STRUCTURE. C) Plot of the number of populations simulated from the posterior distribution obtained with GENELAND. (EPS)

Ambientes marinos pueden jugar un rol importante promoviendo diferenciación genético poblacional en organismos marinos. Aunque los ecosistemas fiordos han llamado mucho la atención debido a la gran oscilación de sus variables ambientales las cuales producen hábitats heterogéneos, especies que habitan en este tipo de ecosistema han recibido menos at...

El objetivo principal del proyecto que se informa es identificar la estructura poblacional del jurel (Trachurus murphyi) en el océano Pacífico sur. El estudio aplicó un enfoque metodológico multidisciplinario que incluye marcadores genéticos, parásito fauna, morfometría de otolitos, química de otolitos y aspectos oceanográficos. Su diseño considera...

Un tema fundamental en el campo de la ecología microbiana es la identificación de la biodiversidad presente en comunidades bacterianas. En la actualidad muchos marcadores genéticos, entre ellos el gen 16S ARNr, se han utilizado para resolver esta situación. En el presente trabajo se presentan los resultados del análisis filogenético de un filamento...

La diversidad genética constituye la materia prima que le permite a una especie adaptarse a un ambiente en constante modificación. Para el camarón de roca existe un desconocimiento total de su diversidad genética a pesar de que es una especie que cumple un importante rol en la estructuración de las comunidades bentónicas de hábitats rocosos. Marcad...

The current study describes the taxonomic and functional composition of metagenomic sequences obtained from a filamentous microbial mat isolated from the Comau fjord, located in the northernmost part of the Chilean Patagonia. The taxonomic composition of the microbial community showed a high proportion of members of the Gammaproteobacteria, includi...

El Dominio Eubacterias es uno de los grupos de mayor abundancia y riqueza taxonómica del planeta, siendo capaces de colonizar y habitar los más diversos ambientes. Históricamente han sido estudiadas mediante cultivo de cepas in vitro con evidentes limitaciones. Por este motivo, la taxonomía molecular y el reconocimiento de Unidades Taxonómicas Ope...

Las nuevas herramientas moleculares de alto rendimiento como la pirosecuenciación 454 de Roche permiten conocer la abundancia relativa de los taxa bacterianos y estudiar la estructura de comunidades procariónticas como nunca antes. Presentamos los resultados de su aplicación al sulfuretum de Humboldt (SH) de Chile central. En función de los niveles...

This communication informs that presence of the Chilean mussel, Mytilus chilensis (Hupe 1854) in the coast of the Bay of Concepcion (Chile) reported in the scientific literature is an erroneous identification, being Mytilus galloprovincialis (Lamarck 1819) the right species.

Nine novel microsatellite loci were developed for Trachurus murphyi. These loci were characterized in samples from three sites along the eastern South Pacifi c Ocean. One of the loci was monomorphic, whereas the rest of the loci had between six and 19 alleles per locus and showed the expected heterozygosity ranging from 0.653 to 0.933. These loci d...

Nine microsatellite loci were developed for Octopus mimus, a cephalopod of commercial importance for artisanal fishermen. Genetic variation at these loci was examined in samples from Clavelito, a Benthic Resources Management Area (AMERB, in Spanish). All nine loci were highly polymorphic, with the number of alleles per locus ranging from 4 to 28 an...

Nine microsatellite loci were developed for Octopus mimus, a cephalopod of commercial importance for artisanal fishermen. Genetic variation at these loci was examined in samples from Clavelito, a Benthic Resources Management Area (AMERB, in Spanish). All nine loci were highly polymorphic, with the number of alleles per locus ranging from 4 to 28 an...

This communication informs that presence of the Chilean mussel, Mytilus chilensis (Hupe 1854) in the coast of the Bay of Concepcion (Chile) reported in the scientific literature is an erroneous identification, being Mytilus galloprovincialis (Lamarck 1819) the right species.Esta comunicación informa que la presencia de Mytilus chilensis (Hupe 1854)...

Nine novel microsatellite loci were developed for Trachurus murphyi. These loci were characterized in samples from three sites along the eastern South Pacific Ocean. One of the loci was monomorphic, whereas the rest of the loci had between six and 19 alleles per locus and showed the expected heterozygosity ranging from 0.653 to 0.933. These loci do...

Three loci microsatellites were used to determine genetic variability and population structure at 15 locations within three zones where Genypterus blacodes is being fully exploited in Chilean waters. A total of 209 individuals were used: 77 from Cuadra Meulin (CM), 65 from the northern Magellan Strait (NMS), and 67 from the southern Magellan Strait...

El objetivo General de Este Documento es determinar las unidades poblacionales de jurel (Trachurus murphyi) existentes en el Pacifico Sur y estudiar los procesos migratorios de este recurso.

Eight microsatellite loci were developed for the jack mackerel (Trachurus murphyi), a fish of significant commercial importance in the Southeast Pacific. Genetic variation at these loci was examined in 15 samples from the locality of Talcahuano (Chile). All eight were highly polymorphic, with a number of alleles per locus ranging from 4 to 22 and a...

Analizamos la utilidad de cinco loci de microsatélites aislados en Genypterus blacodes de Australia en especies de Genypterus presentes en Chile (G. chilensis, G. maculatus y G. blacodes). Los resultados muestran que los loci microsatélites amplifican positivamente en cada especie y podrían ser utilizados en futuros estudios poblacionales.

Analizamos la utilidad de cinco loci de microsatélites aislados en Genypterus blacodes de Australia en especies de Genypterus presentes en Chile (G. chilensis, G. maculatus y G. blacodes). Los resultados muestran que los loci microsatélites amplifcan positivamente en cada especie y podrían ser utilizados en futuros estudios poblacionales.

The genetic variability of two nuclear genes, the 4/5 intron of the Calmodulin (CaM) and the ITS (Internal Transcribed Spacers) of the DNAr were studied. The methodology applied in 139 anchovies (E. ringens) from Iquique and Talcahuano, were the PCR amplification for CaM samples and the PCR amplification and digestion, for ITS samples. The results...