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Title: No loss of genetic diversity in the exploited and recently collapsed population of Bay of Biscay anchovy (Engraulis encrasicolus, L.)
Authors: Montes, Iratxe; Iriondo, Mikel; Manzano, Carmen; Santos, Maria; Carvalho, Gary R.; Irigoien, Xabier; Conklin, Darrell; Estonba, Andone
Abstract: The European anchovy, Engraulis encrasicolus, in the Bay of Biscay suffered a collapse in census population size (N-c) starting in 2002, from which it did not recover until 2010. The slow recovery raised concern over sustainability, potential reduction in adaptive potential, and vulnerability to local extirpation. Long- and short-term effective population size (Ne), N-e/N-c ratio, and other genetic parameters were estimated to evaluate demographic signals of population decline. A total of 349 neutral single-nucleotide polymorphisms (SNPs) were screened in 330 anchovy individuals from the Bay of Biscay distributed across a 20-year period. We show that N-c fluctuations have not significantly affected short-term N-e, and therefore, genetic diversity has remained stable throughout the recent collapse. This study illustrates that N-e estimates should be incorporated into management plans. Our results on short-term N-e suggested that the anchovy in the Bay of Biscay has not faced any recent severe threat of losing evolutionary potential due to genetic drift. However, differences between short- and long-term N-e estimates suggested that the Bay of Biscay anchovy population may be currently much smaller than in the historical past.
Issue Date: 2016
Type: Article
Language: English
DOI: 10.1007/s00227-016-2866-2
ISSN: 0025-3162
E-ISSN: 1432-1793
Funder: project ECOGENBAY - Ministry of Science and Research of the Government of Spain \[MICINN CTM2009-13570-C02-02]
Genomic-Resources Research Group from the Basque University System - Department of Education, Universities and Research of the Basque Government \[IT558-10]
University of the Basque Country (UPV/EHU) \[3571/2008]
Appears in Publication types:Artículos científicos

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