Disentangling the demographic processes that determine the genetic structure of a given species is a fundamental question in conservation and management. In the present study, the population structure of the European eel was examined with a multidisciplinary approach combining the fields of molecular genetics and population dynamics modelling. First, we analyzed a total of 346 adult specimens of known age collected in three separate sample sites using a large panel of 22 EST-linked microsatellite loci. Second, we developed a European eel-specific model to unravel the demographic mechanisms that can produce the level of genetic differentiation estimated by molecular markers. This is the first study that reveals a pattern of genetic patchiness in maturing adults of the European eel. A highly significant genetic differentiation was observed among samples that did not follow an Isolation-by-Distance or Isolation-by-Time pattern. The observation of genetic patchiness in adults is likely to result from a limited parental contribution to each spawning event as suggested by our modelling approach. The value of genetic differentiation found is predicted by the model when reproduction occurs in a limited number of spawning events isolated from each other in time or space, with an average of 130–375 breeders in each spawning event. Unpredictability in spawning success may have important consequences for the life-history evolution of the European eel, including a bet-hedging strategy (distributing reproductive efforts over time) which could in turn guarantee successful reproduction of some adults.

Pujolar, J., Bevacqua, D., Andrello, M., Capoccioni, F., Ciccotti, E., De Leo, G., et al. (2010). Genetic patchiness in European eel adults evidenced by molecular genetics and population dynamics modelling. MOLECULAR PHYLOGENETICS AND EVOLUTION, 58, 198-206 [10.1016/j.ympev.2010.11.019].

Genetic patchiness in European eel adults evidenced by molecular genetics and population dynamics modelling

CAPOCCIONI, FABRIZIO;CICCOTTI, ELEONORA;
2010-12-01

Abstract

Disentangling the demographic processes that determine the genetic structure of a given species is a fundamental question in conservation and management. In the present study, the population structure of the European eel was examined with a multidisciplinary approach combining the fields of molecular genetics and population dynamics modelling. First, we analyzed a total of 346 adult specimens of known age collected in three separate sample sites using a large panel of 22 EST-linked microsatellite loci. Second, we developed a European eel-specific model to unravel the demographic mechanisms that can produce the level of genetic differentiation estimated by molecular markers. This is the first study that reveals a pattern of genetic patchiness in maturing adults of the European eel. A highly significant genetic differentiation was observed among samples that did not follow an Isolation-by-Distance or Isolation-by-Time pattern. The observation of genetic patchiness in adults is likely to result from a limited parental contribution to each spawning event as suggested by our modelling approach. The value of genetic differentiation found is predicted by the model when reproduction occurs in a limited number of spawning events isolated from each other in time or space, with an average of 130–375 breeders in each spawning event. Unpredictability in spawning success may have important consequences for the life-history evolution of the European eel, including a bet-hedging strategy (distributing reproductive efforts over time) which could in turn guarantee successful reproduction of some adults.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/07
English
Con Impact Factor ISI
Adult eels; Anguilla anguilla; European eel; Genetic patchiness; Population dynamics modelling
WOS KeyWords Plus: LINKED MICROSATELLITE LOCI; ANGUILLA-ANGUILLA; SARGASSO SEA; REPRODUCTIVE SUCCESS; CAMARGUE LAGOONS; FRESH-WATER; GLASS EELS; MIGRATION; ATLANTIC; RECEPIMENTO
Scopus Indexed keywords EMTREE drug terms: microsatellite DNA EMTREE medical terms: animal article, biological model, eel genetic variability, genetics, physiology, population dynamics, population genetics, reproduction MeSH: Anguilla, Animals, Genetic Variation, Genetics Population, Microsatellite, Repeats, Models, Genetic, Population Dynamics, Reproduction Species Index: Anguilla anguilla
Research Areas:Biochemistry & Molecular Biology; Evolutionary Biology; Genetics & Heredity Web of Science Categories:Biochemistry & Molecular Biology; Evolutionary Biology; Genetics & Heredity Metrics in Scopus 19 Citations 75th Percentile 1.22 Field-Weighted Citation Impact 40 Mendeley Readers 80th Percentile WOS Metrics: All Times Cited Counts 15 in All Databases 15 in Web of Science Core Collection 13 in BIOSIS Citation Index JOURNAL INFORMATION Molecular Phylogenetics and Evolution Journal Metrics CiteScore: 4.34 ℹ More about CiteScore Impact Factor: 4.419 5-Year Impact Factor: 4.462 Source Normalized Impact per Paper (SNIP): 2.120 SCImago Journal Rank (SJR): 2.194
Pujolar, J., Bevacqua, D., Andrello, M., Capoccioni, F., Ciccotti, E., De Leo, G., et al. (2010). Genetic patchiness in European eel adults evidenced by molecular genetics and population dynamics modelling. MOLECULAR PHYLOGENETICS AND EVOLUTION, 58, 198-206 [10.1016/j.ympev.2010.11.019].
Pujolar, J; Bevacqua, D; Andrello, M; Capoccioni, F; Ciccotti, E; De Leo, G; Zane, L
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/19396
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