Genetic assessment of three gilthead sea bream (Sparus aurata L.) populations along the Spanish coast and of three broodstocks managements

García-Celdrán, M.; Ramis, G.; María-Dolores, Emilio; Peñalver, J.; Borrell, Yaisel J.; Manchado, Manuel; Estévez, Alicia; Afonso, Juan Manuel; Armero, Eva

doi:10.1007/s10499-016-9998-8

Cited by 12 publications

(21 citation statements)

References 29 publications

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“…Broadly, the daily spawning dynamics of the sea bream observed in this work are consistent with the dynamics described to date, which were exclusively based on the assessment of offspring from a single (Brown et al., ; Chavanne et al., ; Porta et al., ) or two consecutive (García‐Celdrán et al., ) daily spawnings produced by broodstock with a census size ( N = 47–131) that was considerably larger than our mini‐broodstocks. Some authors have underscored the importance of using broodstocks with a large census size to obtain a large proportion of contributing parents (García‐Celdrán et al., ). However, our results raise questions concerning this suggestion since more optimal Ne/N ratios were estimated from mini‐broodstocks than from larger broodstocks.…”

Section: Discussionsupporting

confidence: 90%

“…In particular, in the case of gilthead sea bream, several studies have assessed the broodstock contribution after spawning (Borrell et al., ; Brown et al., ; Chavanne et al., ; García‐Celdrán et al., ). Such studies share the same developmental scenario: (1) one or two broodstocks (38–98 PIT‐tagged fish) with an approximate size that is frequently used for industrial production and (2) analysis of a single or two consecutive spawning days.…”

Section: Introductionmentioning

confidence: 99%

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Early assessment of gilthead sea bream (Sparus aurata ) spawning dynamics by mini-broodstocks

2017

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The implementation of any sustainable breeding program requires a maximization of effective size (Ne) to maintain inbreeding rate at minimum levels. However, the control of Ne remains a major challenge for those species whose reproduction in captivity is based on a spawning strategy where there is no control over the established matings. The present study aims to assess the spawning dynamic of gilthead sea bream (Sparus aurata) at different dates from two mini-broodstocks (4 ♀ and 4 ♂). Here we report the use of a simple protocol based on the genotyping of fertilized eggs from a reduced set of microsatellite loci which provides a quick evaluation of daily spawning in terms of family structuring (number of active breeders and number and family size). According to our results, the daily spawning dynamics is characterized by a fluctuation in the number of active breeders, reaching maximum values (until 100%) during peak production phase. However, the proportion of possible mating (families) in a single daily spawning never exceeded more than 81%.Unbalanced parental contributions were highly frequent, with extreme cases involving the assignment of 50%-90% of the offspring to a single family. Therefore, the use of mini-broodstocks and the grouping of spawning harvested at different dates are proposed as strategies to minimize the inbreeding risk by providing a more optimal pattern of family structuring (increase in the number of families obtained and a more balanced parental contributions) that entails a more conservative Ne/N ratio. K E Y W O R D Seffective size, embryonated eggs, microsatellite loci, parentage, Sparus aurata, spawning dynamics

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Early assessment of gilthead sea bream (Sparus aurata ) spawning dynamics by mini-broodstocks

2017

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“…To achieve this, local genetic differences of this species needs first to be clarified in smaller scale studies. Since key information on the biology of the species is missing, spatial distribution and seasonal or year-to-year variation are yet to be assessed (Arabaci et al, 2010;Chavanne et al, 2014;García-Celdrán et al, 2016). Smallscale studies, therefore, despite their limited geographic extent, are very useful in detecting local aberrant variations (Alarcón et al, 2004;Rossi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Smallscale studies, therefore, despite their limited geographic extent, are very useful in detecting local aberrant variations (Alarcón et al, 2004;Rossi et al, 2006). Temporal variation analysis is also needed to understand and interpret any observed genetic differentiation in a certain geographic area (González-Wangüemert et al, 2007). Genetic differentiation among populations may be interpreted in terms of population isolation, genetic drift, reduced gene flow and natural selection (Bargelloni et al, 2005;González-Wangüemert et al, 2004), but these are not always the only cases.…”

Section: Introductionmentioning

confidence: 99%

“…Anthropogenic practices with cultivated species (e.g., stock enhancement and accidental escapes and gamete release from floating cages) can potentially alter the composition of the local gene pool and further complicate data interpretation (Perez-Enriquez et al, 2001). Therefore, the significance of any observed differentiation should be supported by the temporal genetic stability of the observed pattern (González-Wangüemert et al, 2007;Waples, 1998).…”

Section: Introductionmentioning

confidence: 99%

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The genetic population structure and temporal genetic stability of gilthead sea bream Sparus aurata populations in the Aegean and Ionian Seas, using microsatellite DNA markers

Gkagkavouzis

Katopodi

Leonardos

et al. 2019

Journal of Fish Biology

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We examined 662 gilthead sea bream Sparus aurata from wild samples of the species in the Aegean and Ionian Seas, using 20 EST‐linked microsatellite markers, in three multiplex panels, as well as seven anonymous loci. Most of the markers were revealed to be highly polymorphic. We found low genetic differentiation between the sampling stations/areas with total FST 0.002 (P < 0.05). Based on comparison of five temporal samples, our results indicate genetic data consistency over time for all tested samples, pointing to stable populations, despite reported repeated escape events. Our results confirm the genetic population structure previously observed in these specific areas, using by far more markers than in previous studies in both coding and non‐coding DNA loci. The limited genetic structure and the temporal genetic stability indicate neither major genetic differentiation of local populations by geographic isolation nor influence from anthropogenic factors. These results provide a baseline for future reference in any management programme of both wild and farmed population of S. aurata as well as of other aquaculture species with a potential introgression among farmed and wild populations.

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Selection for growth is associated in gilthead sea bream (Sparus aurata) with diet flexibility, changes in growth patterns and higher intestine plasticity

et al. 2019

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Genetic assessment of three gilthead sea bream (Sparus aurata L.) populations along the Spanish coast and of three broodstocks managements

Cited by 12 publications

References 29 publications

Early assessment of gilthead sea bream (Sparus aurata ) spawning dynamics by mini-broodstocks

Early assessment of gilthead sea bream (Sparus aurata ) spawning dynamics by mini-broodstocks

The genetic population structure and temporal genetic stability of gilthead sea bream Sparus aurata populations in the Aegean and Ionian Seas, using microsatellite DNA markers

Selection for growth is associated in gilthead sea bream (Sparus aurata) with diet flexibility, changes in growth patterns and higher intestine plasticity

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