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How to detect polymorphisms undergoing selection in marine fishes? A review of methods and case studies, including flatfishes Guinand, B.; Lemaire, C.; Bonhomme, F. (2004). How to detect polymorphisms undergoing selection in marine fishes? A review of methods and case studies, including flatfishes. J. Sea Res. 51(3-4): 167-182. https://dx.doi.org/10.1016/j.seares.2003.10.002 In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer Ook verschenen in: Geffen, A.J.; Nash, R.D.M.; van der Veer, H.W. (Ed.) (2004). Proceedings of the Fifth International Symposium on Flatfish Ecology, Part II. Port Erin, Isle of Man, 3-7 November 2002. Journal of Sea Research, 51(3-4). Elsevier: Amsterdam. 167-338 pp., meer

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Trefwoorden

Adaptation Analysis > Mathematical analysis > Statistical analysis Aquatic organisms > Marine organisms > Fish > Marine fish Biological phenomena > Adaptations Biopolymorphism Evolution > Adaptation Molecules Selection Selection Pleuronectidae Rafinesque, 1815 [WoRMS] Marien/Kust

Author keywords

selection; molecular markers; statistical tests; adaptation

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Auteurs		Top
Guinand, B. Lemaire, C. Bonhomme, F., correspondent, meer

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Abstract

Populations of marine organisms are potentially affected by numerous selective pressures such as temperature and salinity, or anthropogenic pressures such as xenobiotics that may preclude adaptation to particular habitats. Such selective pressures may also affect their demography. Examples include modifications of the population dynamics through shifts in growth rate, and in life history traits affecting fitness such as size or age of first reproduction. However, the documentation of variation in phenotypically plastic traits specific to distinct environments cannot be taken as the ultimate proof that natural selection has occurred. Measurement of the impact of selection and subsequent local adaptation of fish populations based exclusively on morphological or physiological characters is one of the most difficult things to achieve because it depends on the use of phenotypic characters that closely match the genotype. Molecular markers can help to overcome this problem and, under some circumstances, can record the footprints of selection. A combination of polymorphisms that are under selection and those that are not can provide complementary information. In this paper, we review how and why selection can be detected at the molecular level, using genetic markers analysed in a population genetic framework. We then report and discuss case studies in fish.

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