Results 11 to 20 of about 78,579 (231)

Negative frequency‐dependent selection maintains shell banding polymorphisms in two marine snails (Littorina fabalis and Littorina saxatilis)

Ecology and Evolution, 2021
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 ...
Daniel Estévez, Juan Galindo, Emilio Rolán‐Alvarez   +2 more
doaj   +1 more source

Management of Genetic Diversity in the Era of Genomics

Frontiers in Genetics, 2020
Management of genetic diversity aims to (i) maintain heterozygosity, which ameliorates inbreeding depression and loss of genetic variation at loci that may become of importance in the future; and (ii) avoid genetic drift, which prevents deleterious ...
Theo H. E. Meuwissen, Anna K. Sonesson, Gebreyohans Gebregiwergis, John A. Woolliams   +3 more
doaj   +1 more source

Mining frequent itemsets from streaming transaction data using genetic algorithms

Journal of Big Data, 2020
This paper presents a study of mining frequent itemsets from streaming data in the presence of concept drift. Streaming data, being volatile in nature, is particularly challenging to mine.
Sikha Bagui, Patrick Stanley
doaj   +1 more source

Characterizing patterns of genomic variation in the threatened Utah prairie dog: Implications for conservation and management

Evolutionary Applications, 2021
Utah prairie dogs (Cynomys parvidens) are federally threatened due to eradication campaigns, habitat destruction, and outbreaks of plague. Today, Utah prairie dogs exist in small, isolated populations, making them less demographically stable and more ...
Rachael M. Giglio, Tonie E. Rocke, Jorge E. Osorio, Emily K. Latch   +3 more
doaj   +1 more source

Assessment of genetic drift and migration in six cattle breeds [PDF]

Acta Fytotechnica et Zootechnica, 2020
Slovak Spotted cattle represents an endangered breed with cultural importance in Slovakia. The study was based on the panel of 34,604 SNPs that were used for genotyping of 451 individuals.
Kristína Lehocká
doaj   +1 more source

Genetic Distinctiveness but Low Diversity Characterizes Rear-Edge Thuja standishii (Gordon) Carr. (Cupressaceae) Populations in Southwest Japan

Diversity, 2021
Rear-edge populations are of significant scientific interest because they can contain allelic variation not found in core-range populations. However, such populations can differ in their level of genetic diversity and divergence reflecting variation in ...
James R. P. Worth, Ichiro Tamaki, Ikutaro Tsuyama, Peter A. Harrison, Kyoko Sugai, Hitoshi Sakio, Mineaki Aizawa, Satoshi Kikuchi   +7 more
doaj   +1 more source

Combining genetic and demographic monitoring better informs conservation of an endangered urban snake.

PLoS ONE, 2020
Conversion and fragmentation of wildlife habitat often leads to smaller and isolated populations and can reduce a species' ability to disperse across the landscape.
Dustin A Wood, Jonathan P Rose, Brian J Halstead, Ricka E Stoelting, Karen E Swaim, Amy G Vandergast   +5 more
doaj   +1 more source

Natural Selection and Genetic Drift: Neutral and adaptive genetic variability of hatchery versus wild populations in brown trout Salmo trutta

Frontiers in Marine Science, 2015
Genetic drift and natural selection are two of the major forces shaping the genetic makeup of a population. Genetic drift reduces genetic variability due to the random loss of alleles during the transition from one generation to the next one. The smaller
Tamara Schenekar
doaj   +1 more source

Shell color polymorphism in marine gastropods

Evolutionary Applications, 2023
Marine gastropods are characterized by an incredible variation in shell color. In this review, we aim to introduce researchers to previous studies of shell color polymorphism in this group of animals, trying to provide an overview of the topic and ...
Juan Gefaell, Juan Galindo, Emilio Rolán‐Alvarez   +2 more
doaj   +1 more source

Evolutionary significance of the variation in acoustic communication of a cryptic nocturnal primate radiation (Microcebus spp.)

Ecology and Evolution, 2020
Acoustic phenotypic variation is of major importance for speciation and the evolution of species diversity. Whereas selective and stochastic forces shaping the acoustic divergence of signaling systems are well studied in insects, frogs, and birds ...
Alida Frankline Hasiniaina, Ute Radespiel, Sharon E. Kessler, Mamy Rina Evasoa, Solofonirina Rasoloharijaona, Blanchard Randrianambinina, Elke Zimmermann, Sabine Schmidt, Marina Scheumann   +8 more
doaj   +1 more source