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Auteur BENHAIM, D.; BEGOUT, M.-L.; PEAN, S.; BRISSET, B.; LEGUAY, D.; CHATAIN, B.
Titre Effect of fasting on self-feeding activity in juvenile sea bass (Dicentrarchus labrax) Type Article scientifique
Année 2012 Publication Revue Abrégée Applied Animal Behaviour Science
Volume 136 Numéro 1 Pages 63-73
Mots-Clés Feeding-behaviour; Personality; Plasticity; Self-feeder; Social structure
Résumé In various experiments under self-feeding conditions, sea bass groups could be divided into three categories regarding feeder actuation: high, low and zero-triggering fish. In all cases few high-triggering fish were responsible for a high percentage of the feed delivery. A question was raised about the role played by feeding motivation in such high-triggering status acquisition. It was approached by applying a 3-week fasting period in order to induce similar negative specific growth rate (SGR) in two groups of fish of similar mean weight but with either a low or a high coefficient of variation for weight (CVw)(T-low: CVw similar to 11%, 3 tanks of 60 fish each; T-high: CVw similar to 20%, 3 tanks of 60 fish each). These groups were created to test the consistency of behavioural responses in two different contexts (i.e. two population size-distributions). During the follow-up period of 40 days, the group level feed-demand behaviour was not strongly modified by the fasting period and there were no differences between T-low and T-high groups. Complete growth compensation was the same in all tanks as observed at the end of the experiment. At the individual level, high-triggering fish were exactly the same individuals before and after the fasting period. Up to four high-triggering fish could be observed according to the tank and when several fish were performing high-triggering activity, their rankings were sometimes reversed after the fasting period. High-triggering fish increased their activity levels after the fasting period showing behavioural plasticity. High-triggering status could neither be explained by an initial lower SGR nor a sex effect, nor by any of the measured physiological blood parameters. Thus, individual's triggering activity levels could be related to personality and/or metabolic traits but further research is required to confirm this assumption. (C) 2011 Elsevier B.V. All rights reserved.
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ISSN 0168-1591 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 171
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Auteur Brosset, P.; Lloret, J.; Munoz, M.; Fauvel, C.; Van Beveren, E.; Marques, V.; Fromentin, J.-M.; Menard, F.; Saraux, C.
Titre Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction Type Article scientifique
Année 2016 Publication Revue Abrégée R. Soc. Open Sci.
Volume 3 Numéro 10 Pages 160202
Mots-Clés anchovy; clutch size; daily egg-production; empirical-evidence; energy allocation; environmental variability; herring clupea-harengus; maternal effect; mediterranean sardine; northwest Mediterranean; phenotypic plasticity; sardina-pilchardus; sardine; upwelling systems
Résumé Limited resources in the environment prevent individuals from simultaneouslymaximizing all life-history traits, resulting in trade-offs. In particular, the cost of reproduction is well known to negatively affect energy investment in growth and maintenance. Here, we investigated these trade-offs during contrasting periods of high versus low fish size and body condition (before/after 2008) in the Gulf of Lions. Female reproductive allocation and performance in anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) were examined based onmorphometric historical data from the 1970s and from 2003 to 2015. Additionally, potential maternal effects on egg quantity and quality were examined in 2014/2015. After 2008, the gonadosomatic index increased for sardine and remained steady for anchovy, while a strong decline in mean length at first maturity indicated earlier maturation for both species. Regarding maternal effects, for both species egg quantity was positively linked to fish size but not to fish lipid reserves, while the egg quality was positively related to lipid reserves. Atresia prevalence and intensity were rather low regardless of fish condition and size. Finally, estimations of total annual numbers of eggs spawned indicated a sharp decrease for sardine since 2008 but a slight increase for anchovy during the last 5 years. This study revealed a biased allocation towards reproduction in small pelagic fish when confronted with a really low body condition. This highlights that fish can maintain high reproductive investment potentially at the cost of other traits which might explain the present disappearance of old and large individuals in the Gulf of Lions.
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Langue English Langue du Résumé Titre Original
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Volume de collection Numéro de collection Edition
ISSN 2054-5703 ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 1692
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Auteur Damsgaard, C.; Baliga, V.B.; Bates, E.; Burggren, W.; McKenzie, D.J.; Taylor, E.; Wright, P.A.
Titre Evolutionary and cardio-respiratory physiology of air-breathing and amphibious fishes Type Article scientifique
Année 2019 Publication Revue Abrégée Acta Physiol.
Volume Numéro Pages Unsp-e13406
Mots-Clés acid-base; catfish clarias-gariepinus; development; developmental physiology; different strategies; evolution; kryptolebias-marmoratus; lungfish protopterus; metabolic-rate; phenotypic plasticity; risk-taking; terrestrial acclimation; terrestrialization; tinca-tinca l; water-to-air transition
Résumé Air-breathing and amphibious fishes are essential study organisms to shed insight into the required physiological shifts that supported the full transition from aquatic water-breathing fishes to terrestrial air-breathing tetrapods. While the origin of air-breathing in the evolutionary history of the tetrapods has received considerable focus, much less is known about the evolutionary physiology of air-breathing among fishes. This review summarizes recent advances within the field with specific emphasis on the cardiorespiratory regulation associated with air-breathing and terrestrial excursions, and how respiratory physiology of these living transitional forms are affected by development and personality. Finally, we provide a detailed and re-evaluated model of the evolution of air-breathing among fishes that serves as a framework for addressing new questions on the cardiorespiratory changes associated with it. This review highlights the importance of combining detailed studies on piscine air-breathing model species with comparative multi-species studies, to add an additional dimension to our understanding of the evolutionary physiology of air-breathing in vertebrates.
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Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 1748-1708 ISBN Médium
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Notes WOS:000495996100001 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2665
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Auteur Ferrari, S.; Horri, K.; Allal, F.; Vergnet, A.; Benhaim, D.; Vandeputte, M.; Chatain, B.; Begout, M.-L.
Titre Heritability of Boldness and Hypoxia Avoidance in European Seabass, Dicentrarchus labrax Type Article scientifique
Année 2016 Publication Revue Abrégée PLoS One
Volume 11 Numéro 12 Pages e0168506
Mots-Clés atlantic salmon; behavioral plasticity; confinement stress; individual-differences; rainbow-trout; rearing conditions; Risk-taking; salmon salmo-salar; stress-coping styles; trout oncorhynchus-mykiss
Résumé To understand the genetic basis of coping style in European seabass, fish from a full factorial mating (10 females x 50 males) were reared in common garden and individually tagged. Individuals coping style was characterized through behavior tests at four different ages, categorizing fish into proactive or reactive: a hypoxia avoidance test (at 255 days post hatching, dph) and 3 risk-taking tests (at 276, 286 and 304 dph). We observed significant heritability of the coping style, higher for the average of risk-taking scores (h(2) = 0.45 +/- 0.14) than for the hypoxia avoidance test (h(2) = 0.19 +/- 0.10). The genetic correlations between the three risk-taking scores were very high (r(A) = 0.96-0.99) showing that although their repeatability was moderately high (r(P) = 0.64-0.72), successive risk-taking tests evaluated the same genetic variation. A mild genetic correlation between the results of the hypoxia avoidance test and the average of risk-taking scores (0.45 +/- 0.27) suggested that hypoxia avoidance and risk-taking tests do not address exactly the same behavioral and physiological responses. Genetic correlations between weight and risk taking traits showed negative values whatever the test used in our population i.e. reactive individual weights were larger. The results of this quantitative genetic analysis suggest a potential for the development of selection programs based on coping styles that could increase seabass welfare without altering growth performances. Overall, it also contributes to a better understanding of the origin and the significance of individual behavioral differences.
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Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 1932-6203 ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 2071
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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
Volume 167 Numéro 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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Editeur Elsevier Science Bv Lieu de Publication Éditeur
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Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0168-1591 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ 36814 collection 1235
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