| Enregistrements |
| Auteur |
FERRARI, S.; MILLOT, S.; LEGUAY, D.; CHATAIN, B.; BEGOUT, M.-L. |
| Titre |
Consistency in European seabass coping styles: A life history approach |
Type |
Article scientifique |
| Année |
2015 |
Publication |
Applied Animal Behaviour Science |
Revue Abrégée  |
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| Volume |
167 |
Numéro |
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Pages |
74-88 |
| Mots-Clés |
Behavioural plasticity; Repeatability; Life stages; Dicentrarchus labrax |
| Résumé |
Recent years have seen a growth of interest in the consistent differences in individual behaviour over time and contexts constituting so-called “individual coping styles”. An understanding of this inter-individual variation is essential to improve our knowledge of the adaptive value of behaviour. Coping styles may have implications in diverse fields, so the development of appropriate screening methods for each species appears to be the most effective way to extend our knowledge and to incorporate behavioural responses into selection-based breeding programmes, to improve the domestication and welfare of farmed fish. We tested 30 juvenile seabass (Dicentrarchus labrax) at least twice in individual-based tests (feeding recovery in isolation, aggressiveness, exploration in a T-maze and net restraint) and group-based tests (risk-taking and hypoxia sorting), to assess coping style consistency in the short and long term and between tests. The results of individual-based tests were inconsistent over time and between tests in our set-up: the time between repeat tests, learning and species-specific behavioural responses appeared to have a major impact. By contrast, the results of group-based tests, such as risk-taking and hypoxia sorting, appeared to be consistent (both in the short and long term). These tests therefore appeared to be the most relevant for the characterisation of coping style in European seabass. Furthermore, the results of these tests were also predictive of cortisol stress response. These tests are simple to perform and can be used to screen large numbers of fish, the first step in selection programmes including behavioural profiles |
| Adresse |
IFREMER, Lab Rech Piscicole Mediterranee Chem Maguelone, Stn Expt Aquaculture, F-34250 Palavas Les Flots, France. |
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Thèse |
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| Editeur |
Elsevier Science Bv |
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0168-1591 |
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pas de |
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MARBEC @ isabelle.vidal-ayouba @ 36814 |
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1235 |
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| Auteur |
Vandeputte, M.; Gagnaire, P.-A.; Allal, F. |
| Titre |
The European sea bass: a key marine fish model in the wild and in aquaculture |
Type |
Article scientifique |
| Année |
2019 |
Publication |
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Revue Abrégée |
Animal Genetics |
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Numéro |
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Pages |
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| Mots-Clés |
dicentrarchus labrax; genetics; heritability; population genetics |
| Résumé |
The European sea bass (Dicentrarchus labrax L.) is a marine fish of key economic and cultural importance in Europe. It is now more an aquaculture than a fisheries species (>96% of the production in 2016), although modern rearing techniques date back only from the late 1980s. It also has high interest for evolutionary studies, as it is composed of two semispecies (Atlantic and Mediterranean lineages) that have come into secondary contact following the last glaciation. Based on quantitative genetics studies of most traits of interest over the past 10–15 years, selective breeding programs are now applied to this species, which is at the beginning of its domestication process. The availability of a good quality reference genome has accelerated the development of new genomic resources, including SNP arrays that will enable genomic selection to improve genetic gain. There is a need to improve feed efficiency, both for economic and environmental reasons, but this will require novel phenotyping approaches. Further developments will likely focus on the understanding of genotype-by-environment interactions, which will be important both for efficient breeding of farmed stocks and for improving knowledge of the evolution of natural populations. At the interface between both, the domestication process must be better understood to improve production and also to fully evaluate the possible impact of aquaculture escapees on wild populations. The latter is an important question for all large-scale aquaculture productions. |
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en |
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1365-2052 |
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MARBEC @ isabelle.vidal-ayouba @ |
collection |
2541 |
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| Auteur |
FERRARI, S.; Leguay, D.; Vergnet, A.; Vidal, M.-O.; Chatain, B.; Bégout, M.-L. |
| Titre |
Unpredictability in food supply during early life influences growth and boldness in European seabass, Dicentrarchus labrax |
Type |
Article scientifique |
| Année |
2016 |
Publication |
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Revue Abrégée |
Applied Animal Behaviour Science |
| Volume |
180 |
Numéro |
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Pages |
147-156 |
| Mots-Clés |
Behavior; Dicentrarchus labrax; Environmental effect; Exploration; Food deprivation divergent strains; Personality |
| Résumé |
Biological variability is no longer considered as statistical noise, but rather as an adaptive benefit. This variability comes from consistent differences in behavioral and physiological responses among individuals to a changing/challenging environment, named “coping style”, “temperament” or “personality”. Many studies have described how to characterize personality traits and how to assess their consistency over time and between different contexts; however, little is known about the environmental factors shaping personality development. Because contrasting personalities are maintained with evolution, this lead to the widespread assumption that genes play a predominant role in personality. In many cases, personality traits are however also likely to be determined by individual experience, which is probably at least as important as genetics in shaping personality. The aim of this study was to assess how environmental variability (herein food predictability) impacts behavioral responses, particularly the shyness-boldness axis, one of the most widely shared animal personality trait. Here, we reared juvenile seabass (95 days old) from two divergent strains selected for feed deprivation tolerance under standard conditions for 40 days. Thereafter, we submitted them to two feeding treatments (Predictable versus Unpredictable) starting at 135 dph and lasting 60 days. Seabass reared under a predictable food supply (PFS) grew faster and were shyer than fish reared under an unpredictable food supply (UFS) (i.e. they took more time to exit the refuge zone of a Z-maze; UFS: 132.47 ± 34.63 s; PFS: 336.79 ± 56.97 s) but their exploration tendency was similar. We also examined the behavioral responses of these fish facing a hypoxic challenge. Hypoxia tolerance results were consistent before and after the two feeding treatments. Our findings show the importance of early environmental experience as a driving force shaping boldness. In addition, we provide further evidence that predictable feeding time should be respected in studies assessing essential functions such as growth and behavior. Although personality traits are partially heritable, this study demonstrates the important influence of environmental conditions and life history on behavior. |
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0168-1591 |
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MARBEC @ isabelle.vidal-ayouba @ |
collection |
1574 |
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| Auteur |
Sébastien, F.; Leguay, D.; Vergnet, A.; Vidal, M.-O.; Chatain, B.; Bégout, M.-L. |
| Titre |
Unpredictability in food supply during early life influences growth and boldness in European seabass, Dicentrarchus labrax |
Type |
Article scientifique |
| Année |
2016 |
Publication |
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Revue Abrégée |
Applied Animal Behaviour Science |
| Volume |
180 |
Numéro |
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Pages |
147-156 |
| Mots-Clés |
Behavior; Dicentrarchus labrax; Environmental effect; Exploration; Food deprivation divergent strains; Personality |
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English |
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0168-1591 |
ISBN |
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Médium |
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Approuvé |
pas de |
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MARBEC @ isabelle.vidal-ayouba @ |
collection |
2409 |
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| Auteur |
Siddique, M.A.M.; Butts, I.A.E.; Linhart, O.; Macias, A.D.; Fauvel, C. |
| Titre |
Fertilization strategies for Sea Bass Dicentrarchus labrax (Linnaeus, 1758): effects of pre-incubation and duration of egg receptivity in seawater |
Type |
Article scientifique |
| Année |
2015 |
Publication |
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Revue Abrégée |
Aquac Res |
| Volume |
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Numéro |
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Pages |
1-9 |
| Mots-Clés |
Dicentrarchus labrax; egg longevity; Mediterranean sea bass; overripe eggs; reproductive ecology |
| Résumé |
Studying gamete biology can provide important information about a species fertilization strategy as well as their reproductive ecology. Currently, there is a lack of knowledge about how long sea bass Dicentrarchus labrax eggs can remain viable after being activated in seawater. The objectives of this study were to understand the effects of pre-incubation of fresh and overripe sea bass eggs in seawater and to determine the duration of egg receptivity. Pooled eggs (fresh and overripe) from four females were pre-incubated in seawater for 0 min (control), 0.5 min, 1 min, 3 min, 10 min and 30 min and then fertilized by pooled sperm from four males. The fresh eggs had a higher fertilization success than overripe eggs. Our results revealed a significant effect of pre-incubation time for both the fresh (P < 0.01) and overripe eggs (P < 0.01). Fertilization success of eggs significantly declined for both these treatments after 3 min of pre-incubation, which clearly indicates that sea bass eggs are able to be fertilized by sperm for up to 3 min after release into seawater. This study has particular importance for understanding fertilization strategies, reproductive potential, as well as reproductive ecology of sea bass. |
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en |
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1365-2109 |
ISBN |
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Médium |
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| Notes |
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Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
1456 |
| Lien permanent pour cet enregistrement |
