María Quintela

María Quintela
Institute of Marine Research in Norway | IMR · Population Genetics

PhD

About

86
Publications
11,653
Reads
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1,147
Citations
Additional affiliations
October 2017 - June 2018
Institute of Marine Research in Norway
Position
  • Principal Investigator
February 2013 - present
Institute of Marine Research in Norway
Position
  • Researcher
January 2006 - March 2010
Uppsala University
Position
  • PostDoc Position

Publications

Publications (86)
Article
Full-text available
Identifying how physical and biotic factors shape genetic connectivity among populations in time and space is essential to our understanding of the evolutionary trajectory as well as the management of marine species. Atlantic cod is a widespread and commercially important marine species displaying several ecotypes with different life history strate...
Preprint
Full-text available
Lumpfish ( Cyclopterus lumpus ) is a transatlantic marine fish displaying large population sizes and a high potential for dispersal and gene-flow. These features are expected to result in weak population structure. Here, we investigated population genetic structure of lumpfish throughout its natural distribution in the North Atlantic using two appr...
Article
Full-text available
Background In species showing partial migration, as is the case for many salmonid fishes, it is important to assess how anthropogenic pressure experienced by migrating individuals affects the total population. We focused on brown trout ( Salmo trutta ) from the Guddal River in the Norwegian Hardanger Fjord system, which encompasses both resident an...
Article
Full-text available
The cold-adapted polar cod Boreogadus saida, a key species in Arctic ecosystems, is vulnerable to global warming and ice retreat. In this study, 1257 individuals sampled in 17 locations within the latitudinal range of 75–81°N from Svalbard to East Siberian Sea were genotyped with a dedicated suite of 116 single-nucleotide polymorphic loci (SNP). Th...
Article
Full-text available
Translocation and introduction of non‐native organisms can have major impacts on local populations and ecosystems. Nevertheless, translocations are common practise in agri‐ and aquaculture. Each year, millions of wild caught wrasses are transported large distances to be used as cleaner fish for parasite control in marine salmon farms. Recently, it...
Article
Full-text available
Habitat changes represent one of the five most pervasive threats to biodiversity. However, anthropogenic activities also have the capacity to create novel niche spaces to which species respond differently. In 1880, one such habitat alterations occurred in Landvikvannet, a freshwater lake on the Norwegian coast of Skagerrak, which became brackish af...
Article
Full-text available
Population connectivity is an increasingly important focal area for the understanding of how marine fish populations respond to anthropogenic pressures like climate change and fisheries. Our model species, the saithe Pollachius virens (Linnaeus, 1758), was chosen because genetic analyses have documented a mismatch between the assessed stocks and th...
Article
Full-text available
Challenging long‐held perceptions of fish management units can help to protect vulnerable stocks. When a fishery consisting of multiple genetic stocks is managed as a single unit, overexploitation and depletion of minor genetic units can occur. Atlantic cod (Gadus morhua ) is an economically and ecologically important marine species across the Nort...
Article
Full-text available
Sustainable fisheries management requires detailed knowledge of population genetic structure. The European sprat is an important commercial fish distributed from Morocco to the Arctic circle, Baltic, Mediterranean and Black Sea´s. Prior to 2018, annual catch advice on sprat from the International Council for the Exploration of the Sea (ICES) was ba...
Article
Full-text available
Capture and long‐distance translocation of cleaner fish to control lice infestations on marine salmonid farms has the potential to influence wild populations via overexploitation in source regions, and introgression in recipient regions. Knowledge of population genetic structure is therefore required. We studied the genetic structure of ballan wras...
Article
Full-text available
The preference for coastal habitats makes the harbour porpoise, Phocoena phocoena, vulnerable to fisheries conflicts and hence prone to die due to entangling in fishing nets. An opportunistic sampling of such casualties (134 individuals) in Norwegian waters was used to assess the genetic population structure of the species by SNP-genotyping at 78 l...
Article
Full-text available
Understanding migratory patterns is important for predicting and mitigating unwanted consequences of environmental change or anthropogenic challenges on vulnerable species. Wild Atlantic salmon undergo challenging migrations between freshwater and marine environments, and the numbers of salmon returning to their natal rivers to reproduce have decli...
Article
Full-text available
The way adaptive and neutral genetic variation is shaped by environmental factors is crucial for evolutionary biology. To investigate whether wave exposure can enhance local adaptation on littoral snails, AFLP markers were scanned across ten populations of Nucella lapillus from contrasting habitats (protected vs. exposed). As some 6% of the analyse...
Article
Full-text available
Blue ling is a deep-water species that has been severely fished upon into coastal and offshore fisheries since the early 1970s, thus causing the collapse of the populations in the last two decades. Genetic information is scarce in this species, and molecular markers are therefore needed to provide advice both for management and for rebuilding the s...
Article
Full-text available
We have monitored tributyltin (TBT) pollution in Galicia (NW Spain) for more than a decade by means of assessing gastropod imposex in populations of Nucella lapillus (N ≥ 34) and Tritia reticulata (N ≥ 18) at regular intervals. Several thousand specimens were processed to obtain their shell height (SH), penis length (PL) and vas deferens sequence (...
Article
Full-text available
Atlantic salmon is characterized by a high degree of population genetic structure throughout its native range. However, while populations inhabiting rivers in Norway and Russia make up a significant proportion of salmon in the Atlantic, thus far, genetic studies in this region have only encompassed low to modest numbers of populations. Here, we pro...
Article
Full-text available
Ectotherm development rates often show adaptive divergence along climatic gradients, but the genetic basis for this variation is rarely studied. Here, we investigated the genetic basis for phenotypic variation in larval development in the moor frog Rana arvalis from five regions along a latitudinal gradient from Germany to northern Sweden. We focus...
Article
Full-text available
Background: Atlantic cod (Gadus morhua L.) has formed the basis of many economically significant fisheries in the North Atlantic, and is one of the best studied marine fishes, but a legacy of overexploitation has depleted populations and collapsed fisheries in several regions. Previous studies have identified considerable population genetic struct...
Article
Full-text available
The salmon louse is a highly abundant ectoparasitic copepod of salmonids in the North Pacific and Atlantic. Widespread and rapid development of resistance to chemical agents used to delouse salmonids on marine farms is now threatening the continued development of the aquaculture industry, and has served as a potent catalyst for the development of a...
Article
Full-text available
The salmon industry is heavily dependent on wrasse for delousing infected fish. The goldsinny wrasse is numerically the most important, and each year, millions are harvested from the wild and transported large distances into fish farms. Population genetic knowledge is required to sustainably exploit this species. Here, 1051 goldsinny wrasses from 1...
Article
Full-text available
Background: In the marine environment, where there are few absolute physical barriers, contemporary contact between previously isolated species can occur across great distances, and in some cases, may be inter-oceanic. An example of this can be seen in the minke whale species complex. Antarctic minke whales are genetically and morphologically dist...
Article
Full-text available
Aquaculture escapees represent a threat to the genetic integrity of native populations, may spread infectious agents, and display ecological interactions with wild fish. DNA-based identification methods are well established for tracing Atlantic salmon escapees back to their farms of origin. However, traditional genetic assignment approaches are not...
Article
Temperature is one of the most influential forces of natural selection impacting all biological levels. In the face of increasing global temperatures, studies over small geographical scales allowing investigations on the effects of gene flow are of great value for understanding thermal adaptation. Here we investigated genetic population structure i...
Article
Full-text available
Wrasse (Labridae) species have been used as parasite cleaners in Atlantic salmon farming since the 1980s. However, their use has recently escalated, with millions now being introduced into salmon cages each year. Most fish are of wild origin, their exploitation potentially impacting native populations. Genetic information is urgently required to in...
Article
The ballan wrasse, Labrus bergylta is a marine fish belonging to the family Labridae characterised by two main morphotypes that occur in sympatry: spotty and plain. Previous studies have revealed differences in their life-history traits such as growth and maturation; however, the genetic relationship between forms is presently unknown. Using twenty...
Article
Full-text available
While temperature variation is known to cause large-scale adaptive divergence, its potential role as a selective factor over microgeographic scales is less well understood. Here, we investigated how variation in breeding pond temperature affects divergence in multiple physiological (thermal performance curve (TPC) and critical thermal maximum (CTma...
Article
Full-text available
Inferring the number of genetically distinct populations and their levels of connectivity is of key importance for the sustainable management and conservation of wildlife. This represents an extra challenge in the marine environment where there are few physical barriers to gene-flow, and populations may overlap in time and space. Several studies ha...
Article
Full-text available
The way environmental variation shapes neutral and adaptive genetic variation in natural populations is a key issue in evolutionary biology. Genome scans allow the identification of the genetic basis of local adaptation without previous knowledge of genetic variation or traits under selection. Candidate loci for divergent adaptation are expected to...
Article
Full-text available
We developed 20 nuclear microsatellite DNA markers from tri- and tetra-nucleotide enriched libraries in the ballan wrasse. In our dataset (N = 241), the detected number of alleles per locus ranged from 2 to 12, and the observed and expected heterozygosity varied from 0.251 to 0.778 and from 0.286 to 0.804, respectively. Cross amplification with the...
Article
Full-text available
Black grouse (Tetrao tetrix) in Central Europe have undergone a severe contraction of their range in recent decades with only a few small isolated remaining populations. Here we compare genetic diversity of two contemporary isolated populations (Sallandse Heuvelrug, Netherlands and Lüneburger Heide, Germany) with historical samples from the same re...
Article
Using independently segregating nuclear single nucleotide polymorphisms (SNPs) and mitochondrial control region sequences, we found an east–west division among sampled willow grouse Lagopus lagopus subspecies. This division cut across the range of the subspecies with the largest distribution (lagopus) and thus contradicted existing taxonomic classi...
Article
Full-text available
Adaptive ecological differentiation among sympatric populations is promoted by environmental heterogeneity, strong local selection and restricted gene flow. High gene flow, on the other hand, is expected to homogenize genetic variation among populations and therefore prevent local adaptation. Understanding how local adaptation can persist at the sp...
Article
Full-text available
Dispersal has received growing attention in marine ecology, particularly since evidence obtained with up-to-date techniques challenged the traditional view. The dogwhelk Nucella lapillus L., a sedentary gastropod with direct development, is a good example: dispersal was traditionally assumed to be limited until studies with microsatellites disputed...
Data
Nucella lapillus. UPGMA analysis based on Nei’s genetic distances between sites. (TIF)
Data
Primer sequences used for the AFLP selective amplification and number of loci generated. (DOCX)
Poster
Full-text available
In classical models of population genetics, is considered that the isolation by distance (IBD) is a major cause of genetic drift among populations for neutral markers. In fact, IBD predicts that more geographical distance, more genetic distance, with consideration that the landscape as a homogeneous matrix between different elements of study. This...
Article
Full-text available
Each year, hundreds of thousands of domesticated farmed Atlantic salmon escape into the wild. In Norway, which is the world's largest commercial producer, many native Atlantic salmon populations have experienced large numbers of escapees on the spawning grounds for the past 15-30 years. In order to study the potential genetic impact, we conducted a...
Data
Bayesian clustering of historical (H), intermediate (I) and contemporary (C) samples for 21 Atlantic salmon rivers separately. (DOC)
Data
Hierarchical Bayesian clustering of the 21 rivers in the historical and contemporary data sets. (DOC)
Data
Bayesian clustering of the 21 rivers in the historical and contemporary data sets when combined together with data from 9 distinct farm sources. (DOC)
Data
Years in which samples were taken for the historical, intermediate, and contemporary data sets. (XLS)
Data
Effective population size for samples in the historical and contemporary data sets as computed by the LD method as implemented in LDNE [90] . (XLS)
Data
Locus by sample summary statistics for the historical, intermediate and contemporary samples collected from 21 Norwegian rivers. (XLS)
Data
Allele frequencies observed in the historical and contemporary data sets for 22 microsatellite markers. (XLS)
Data
Description of methods and results for identification of markers putatively under selection. (DOC)
Article
Full-text available
The ability of natural populations to adapt to new environmental conditions is crucial for their survival and partly determined by the standing genetic variation in each population. Populations with higher genetic diversity are more likely to contain individuals that are better adapted to new circumstances than populations with lower genetic divers...