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Registros recuperados: 14
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Caractérisation de l’adaptation comportementale des téléostéens en élevage : plasticité et effets de la domestication ArchiMer
Benhaim, David.
The farming of aquatic animals has started recently in comparison with that of terrestrial species which domestication started 10 500 years ago. Aquaculture is however the fastest growing animal food-production sector. This sector has now to face several challenges threatening its sustainability. Indeed, aquaculture future largely depends upon the reduction of the reliance on feeds based ingredients derived from wild fishery resources, upon a better knowledge of fish domestication process and of the adaptation mechanisms and related welfare potential. The present work aims at a better understanding of the adaptation to farming conditions through a behavioural approach based on the comparison between wild vs. domesticated populations of three species: a...
Tipo: Text Palavras-chave: Adaptation; Plasticité; Domestication; Bien-être; Comportement alimentaire; Activité de nage; Personnalité; Aliment végétal; Labyrinthe; Statut physiologique; Croissance; Aquaculture; Repeuplement; Adaptation; Plasticity; Learning; Domestication; Welfare; Feeding behaviour; Swimming activity; Personality; Plant-based diet; Maze; Physiological status; Growth; Aquaculture; Restocking.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00078/18926/16515.pdf
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Contrôle des performances biologiques de populations diploïdes et triploïdes d'huîtres creuses Crassostrea gigas ArchiMer
Benhaim, David.
Un programme concerannt le contrôle des perforùances biologiques de lots diploïdes et triploïdes d'huîtres creuses Crassostrea gigas a débuté en mars 1993 à La Tremblade et dans d'autres station IFREMER associées. Le présent rapport rend compte des cinq premiers mois d'analyses faisant partie d'un contrôle qui devrait se poursuivre jusqu'en 1994. A La Tremblade, l'expéreince repose principalement sur la comparaison des paramètres biométriques et biochimiques des lots diploïdes et triploïdes en deux sites d'étude : un parc ostréicole sur le bassin de Marennes-Oléron et une claire. Les individus diploïdes réfractaires du lot triploïde, sont identifiés par imagerie numérique et écartés des analyses. Les résultats obtenus montrent une difféence marquée entre...
Tipo: Text Palavras-chave: Crassostrea gigas; Triploïdes; Diploïde; Estran; Croissance; Biochimie.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00411/52220/52948.pdf
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Early life behavioural differences in wild caught and domesticated sea bass (Dicentrarchus labrax) ArchiMer
Benhaim, David; Pean, Samuel; Lucas, Gael; Blanc, Nancy; Chatain, Beatrice; Begout, Marie-laure.
Behavioural studies comparing hatchery and wild-caught fish are useful to improve selection for aquaculture and restocking programmes. We examined swimming behaviour characteristics in wild captured and domesticated sea bass juveniles before and after eliciting a startle response at 8 different ages and always on naive individuals. We specifically investigated whether domestication impacts juvenile sea bass behaviour and whether the first months of captivity induce behavioural modifications in wild juveniles. An apparatus was designed to mimic a predator attack by presenting a sudden visual and mechanical stimuli simultaneously in 8 arenas where single individuals were placed and video recorded. The reactivity response was evaluated and different swimming...
Tipo: Text Palavras-chave: Domestication; Swimming activity; Restocking; Selection; Coping styles.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00102/21363/19403.pdf
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Effect of fasting on self-feeding activity in juvenile sea bass (Dicentrarchus labrax) ArchiMer
Benhaim, David; Begout, Marie-laure; Pean, Samuel; Brisset, Blandine; Leguay, Didier; Chatain, Beatrice.
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...
Tipo: Text Palavras-chave: Personality; Plasticity; Feeding-behaviour; Self-feeder; Social structure.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00069/18004/15672.pdf
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Effect of size grading on sea bass (Dicentrarchus labrax) juvenile self- feeding behaviour, social structure and culture performance ArchiMer
Benhaim, David; Pean, Samuel; Brisset, Blandine; Leguay, Didier; Begout, Marie-laure; Chatain, Beatrice.
This study aims to test the influence of size grading on self-feeding behaviour, social structure (measured by the percentage of triggering acts per individual), growth performances, and blood physiological variables of individually passive integrated transponder (PIT)-tagged sea bass juveniles, using a computerized on-demand feeding system coupled with a PIT tag monitoring device. Three consecutive periods of 27 days each were compared: a first period (P1) before grading (6 tanks of 100 fish; 40.2 +/- 8.9 g) followed by a second period (P2) after grading. The protocol applied aimed to create two groups of fish of similar mean weight but with either a low or a high coefficient of variation of weight (CV(w)) corresponding to an imposed difference in social...
Tipo: Text Palavras-chave: Feeding behaviour; Self feeder; Triggering activity; Heterogeneity; Growth; Grading.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00057/16858/14340.pdf
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First Insight into Exploration and Cognition in Wild Caught and Domesticated Sea Bass (Dicentrarchus labrax) in a Maze ArchiMer
Benhaim, David; Begout, Marie-laure; Lucas, Gael; Chatain, Beatrice.
European sea bass aquaculture is so recent that very little is known on the effects of the early steps of its domestication. Behavioural parameters are sensitive indicators of the domestication process since they are generally impacted as soon as the first generation. The present work compared wild-caught and domesticated sea bass juvenile swimming activity, exploration and ability to learn to discriminate between two 2-D objects associated to a simple spatial task that enabled the tested individual to visually interact with an unfamiliar congener (the reward) located behind a transparent wall at the end of one of the two arms of a maze. Ten fish from each origin were individually tested 3 times in a row during 3 days (9 trials in total). Fish were placed...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00152/26306/24400.pdf
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First links between self-feeding behaviour and personality traits in European seabass, Dicentrarchus labrax ArchiMer
Ferrari, Sebastien; Benhaim, David; Colchen, Tatiana; Chatain, Beatrice; Begout, Marie-laure.
Most studies carried out with seabass under self-feeding conditions report an intriguing social structure that is built around the device and the food dispenser with three coexisting triggering categories: high-triggering (HT), low-triggering (LT) and zero-triggering (ZT) fish. However, neither sex nor feeding motivation or hierarchy can explain the establishment of this specialization. We characterised the personality of seabass with the commonly used restraint and open field tests and assessed the link between personality traits and individual triggering activity towards the self-feeder apparatus. We found no differences between triggering categories during the restraint test but high triggering fish were characterised as shyer than low- and...
Tipo: Text Palavras-chave: Behaviour; Boldness; Foraging; Open field test; Restraint test; Teleost.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00216/32742/31147.pdf
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Genetic differences for behaviour in juveniles from two strains of brown trout suggest an effect of domestication history ArchiMer
Benhaim, David; Guyomard, Rene; Chatain, Beatrice; Quillet, Edwige; Begout, Marie-laure.
Because captivity constitutes a drastic environmental change, domestication is expected to induce a rapid genetic selection for behavioural traits. In this study, we searched for genetic differences in behaviour among brown trout juveniles from two strains differing for their domestication history, i.e. an almost pure native wild Mediterranean population (W) and an Atlantic domesticated strain (D). In order to assess pure genetic differences among strains, males from the two origins were mated with Mediterranean females to produce two experimental crosses (WW and WD). The swimming activity characteristics of individual WW and WD juveniles were compared before and after the application of a stress (light switched off suddenly, followed by a 5-min period of...
Tipo: Text Palavras-chave: Domestication; Genotyping; Microsatellite; Swimming activity; Restocking.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00152/26301/24409.pdf
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Heritability of Boldness and Hypoxia Avoidance in European Seabass, Dicentrarchus labrax ArchiMer
Ferrari, Sebastien; Horri, Khaled; Allal, Francois; Vergnet, Alain; Benhaim, David; Vandeputte, Marc; Chatain, Beatrice; Begout, Marie-laure.
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 (h2 = 0.45 ± 0.14) than for the hypoxia avoidance test (h2 = 0.19 ± 0.10). The genetic correlations between the three risk-taking scores were very high (rA = 0.96–0.99) showing that although their repeatability was moderately high (rP =...
Tipo: Text
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00362/47278/47239.pdf
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Impact of a plant-based diet on behavioural and physiological traits in sea bass (Dicentrarchus labrax) ArchiMer
Benhaim, David; Begout, Marie-laure; Pean, Samuel; Manca, Michael; Prunet, Patrick; Chatain, Beatrice.
Replacing aquaculture feeds based on fisheries-derived resources with plant-based diets could be a relevant strategy to improve the sustainability of aquaculture. Recent studies on sea bass have shown that the total and early replacement of marine products by plant products would have a moderate effect on fish growth and body lipid content. Whether a plant-based diet impacts behavioural and physiological traits possibly linked to fish welfare, is not known, however. Here, we studied the effect of a totally plant-based diet introduced at an early stage of sea bass development on self-feeding behaviour, learning ability in a T-maze and stress biomarkers. We first compared learning processes in self-feeding conditions, between naive fish fed a plant-based...
Tipo: Text Palavras-chave: Self-feeder; Plant-based diet; Learning; Exploratory behaviour; Cortisol; Dicentrarchus labrax.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00152/26309/24381.pdf
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Relationship between individual and group learning in a marine teleost: A case study with sea bass under self-feeding conditions ArchiMer
Benhaim, David; Ferrari, Sebastien; Colchen, Tatiana; Chatain, Beatrice; Begout, Marie-laure.
Fish learning and cognition are usually approached by testing single individuals in various devices such as mazes that have serious drawbacks, especially in gregarious species, including the stress induced by the test procedure. This might impair the results and lead to misinterpretation about the learning abilities of the targeted species. In order to provide an alternative to the individual-based tests, we investigated for the first time the operant conditioning of four similar groups (50 individuals per tank) of sea bass. We used two computerized self-feeder devices per tank, each coupled with individual electronic identification and that were alternately activated during varying positive appetitive reinforcement period of time (7 to 1 day). Learning...
Tipo: Text Palavras-chave: Operant conditioning; Group conditions; Social structure; Producer-scrounger; Personality traits; Positive reinforcement.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00380/49125/49665.pdf
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Self-feeding behaviour and personality traits in tilapia: a comparative study between Oreochromis niloticus and Sarotherodon melanotheron ArchiMer
Benhaim, David; Akian, Dieudonne; Ramos, Mathieu; Ferrari, Sebastien; Yao, Kouakou; Begout, Marie-laure.
Hybridization aims at combining valuable traits from two species into a single group. Nile tilapia Oreochromis niloticus (NT) and Black-chinned tilapia Sarotherodon melanotheron (BCT) are respectively characterized by fast growth and water salinity tolerance which attract the breeders who could take advantage of both species. The first step is to characterize both species behavior in different contexts. The aim of this study was to compare the self-feeding behaviour between NT and BCT with a design allowing to reveal individual and group feed demand behaviour and then to identify the individual specialization that builds around the device and the food dispenser. The second objective was to estimate the links between the individual specialization and...
Tipo: Text Palavras-chave: Boldness; Personality; Self-feeder; Individual specialization; Social structure.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00363/47419/47424.pdf
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The shy prefer familiar congeners ArchiMer
Benhaim, David; Ferrari, Sebastien; Chatain, Beatrice; Begout, Marie-laure.
The shy–bold continuum is both a fundamental aspect of human behavior and a relatively stable behavioral trait for many other species. Here we assessed whether shy individuals prefer familiar congeners, taking the European sea bass, a recently domesticated fish showing similar behavioral responses to wild fish, as a model to better understand the inter-individual variability in social behavior previously observed in this species. In the wild, the link between familiarity i.e. the preference of fish for familiar congeners and boldness could be part of the mechanism underlying shoaling formation in fish. Thirty fish were individually tested in a device designed to assess the preference for a familiar vs. an unfamiliar congener on the basis of visual cues...
Tipo: Text Palavras-chave: Familiarity; Personality; Open field; Social behavior; Swimming activity; Shyness; Shoaling behavior; Visual cue.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00319/43049/42554.pdf
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Unfamiliar congener used as a visual attractor in wild caught and domesticated sea bass (Dicentrarchus labrax) placed in a T-maze ArchiMer
Benhaim, David; Begout, Marie-laure; Chatain, Beatrice.
The present work compared wild-caught and domesticated sea bass juveniles swimming activity, exploration and visual attraction induced by an unfamiliar congener located behind a transparent wall at the end of one arm of a T-maze. This cognitive challenge was based on the hypothesis that placed into a novel and therefore stressful environment; the fish would adopt a gregarious behaviour even though they were not familiar with the present congener. Twenty individuals of similar size from both origins were individually tested. After a 5min acclimatization period, the wall of the start-box was removed and the maze was filmed during 20 min. Different swimming variables including angular velocity (Vang), total distance travelled (Dtot), velocity mean (Vel), time...
Tipo: Text Palavras-chave: Domestication; Maze; Visual cue; Personality; Swimming activity.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00192/30322/28793.pdf
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