Daniel EstevezGreenland Institute of Natural Resources · Fish and Shellfish
Evolutionary Biology PhD
Postdoc at Greenland Institute of Natural Resources. NORSUSTAIN project
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Citations since 2017
11 Research Items
Daniel Estevez currently works at the Department of Fish and Shellfish at the Greenland Institute of Natural Resources and he researches population genetics of fish stocks.
Understanding the genetic differentiation among populations of most marine fish requires investigating the differences among spawning grounds. However, this can be challenging as spawning grounds for some species are not well known, or spawning fish are difficult to collect. An alternative is to collect juvenile fish in nursery habitats closely ass...
Marine fisheries are often allocated to stocks that reflect pragmatic considerations and may not represent the species’ spatial population structure, increasing the risk of mismanagement and unsustainable harvesting. Here we compile mark–recapture data collected across the North Atlantic to gain insight into the spatial population structure of Gree...
Colour polymorphism is a widespread phenomenon in natural populations of several species. In particular, it is especially common on marine gastropod species from the genus Littorina. Recently, it has been argued that intrapopulation shell colour polymorphism in Littorina fabalis could be caused by negative frequency-dependent sexual selection via a...
The presence of shell bands is common in gastropods. Both the marine snails Littorina fabalis and Lttorina saxatilis are polymorphic for this trait. Such polymorphism would be expected to be lost by the action of genetic drift or directional selection, but it appears to be widespread at relatively constant frequencies. This suggests it is maintaine...
Colour polymorphism is a widespread phenomenon in natural populations of several species. In particular, it is especially common on marine gastropod species from the genus Littorina . Recently, it has been argued that intrapopulation shell colour polymorphism in Littorina fabalis could be caused by negative frequency-dependent sexual selection via...
Natural color polymorphisms are widespread across animal species and usually have a simple genetic basis. This makes them an ideal system to study the evolutionary mechanisms responsible for maintaining biodiversity. In some populations of the intertidal snail Littorina fabalis, variation in shell color has remained stable for years, but the mechan...
Sexual size dimorphism is widespread among dioecious species, but its underlying driving forces are often complex. A review of sexual size dimorphism in marine gastropods revealed two common patterns: first, sexual size dimorphism, with females being larger than males, and, second, females being larger than males in mating pairs. Both patterns sugg...
Mate choice is a key life history trait and has been widely examined across animal taxa, yet the spatial scale at which animals exercise this choice has rarely been examined. Here we propose a novel method to estimate the spatial scale of mate choice in situ based on a recently developed experimental approach to evaluate, in an unbiased fashion, as...
Mating preference can be a driver of sexual selection and assortative mating and is, therefore, a key element in evolutionary dynamics. Positive mating preference by similarity is the tendency for the choosy individual to select a mate which possesses a similar variant of a trait. Such preference can be modelled using Gaussian-like mathematical fun...
The mode in which sexual organisms choose mates is a key evolutionary process, as it can have a profound impact on fitness and speciation. One way to study mate choice in the wild is by measuring trait correlation between mates. Positive assortative mating is inferred when individuals of a mating pair display traits that are more similar than those...
Littorina fabalis is an intertidal snail commonly living on the brown algae Fucus vesiculosus and showing frequent shell-color polymorphisms in the wild. The evolutionary mechanism underlying this polymorphism is currently unknown. Shell color variation was studied in mated and non-mated specimens of this species from different microareas in one lo...
I am looking for a package with the same/similar algorithm to Bayescan but that can be performed in a M1 processor computer.
I am trying to calculate a global Fst for a genomic dataset of 5560 SNPs with four populations. I am not only interested in the value itself but also in the confidence interval. I have tried with the function diffCalc of the R package diveRsity:
diveRsity::diffCalc("data_genepop.txt", bs_locus = TRUE, boots = 1000, fst = TRUE, pairwise = FALSE, para = TRUE)
However my computer either freezes or returns an error after hours.
From allozymes to current genome wide scans, genetics and related fields have evolved greatly and in little time. Overall, this is positive but also entails complications, specially on management and conservation of living resources: this is, what stood true using certain genetic markers is no longer true with more modern approaches. For this discussion, I am looking for a relevant (ideally modern publication) that gives an historical perspective of genetic usage on fisheries management.
I would like to know if there are some studies where a mechanism for the snail to detect its own colour is described
After taking an aerial photograph is mandatory to georeference the photo (raster layer) with a known set of coordinate points. In Qgis, the georeferencer tool allows to perform this after placing the coordinates and specifying a transformation type and a resampling method. I want to know if these details can be known from the already referenced raster layer
I have encountered one paper talking about the differences of Fucus serratus according to the exposure they have to endure. In exposed shores the algae tend to have thicker stems and Rhizomes.
There is a brief description in the webpage but a detailed manual cannot be found there. The version I am currently using is the 2.9.3
Dentro del proyecto "Especiación ecológica con flujo génico: evolución de la preferencia durante el apareamiento en simpatría", investigo las causas y mecanismos responsables de la diversidad de color en el gasterópodo Littorina fabalis (Turton 1825).