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Sylvain Huchette

Sylvain Huchette
France Haliotis SCEA · Hatchery

PhD in Marine Biology

About

70
Publications
12,377
Reads
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1,572
Citations
Citations since 2016
25 Research Items
808 Citations
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2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Introduction
Sylvain Huchette currently works at the Hatchery, France Haliotis SCEA. Sylvain does research in Aquaculture. Their current projects are 'BIODIVORMEAU', 'IDEALG', 'GENORMEAU', 'ICObio'...
Additional affiliations
January 2000 - December 2003
University of Melbourne

Publications

Publications (70)
Article
Full-text available
This study examined the physiological responses of the larval stages of Haliotis tuberculata, an economically important abalone, to combined temperature (17 °C and 19 °C) and pH (ambient pH and −0.3 units, i.e., +200% increase in seawater acidity) in a full factorial experiment. Tissue organogenesis, shell formation, and shell length significantly...
Article
Since the observation in 2005 of a disordered mineral layer at the surface of aragonite platelets in abalone Haliotis laevigata nacre, the model of the organo-mineral interface in such biomineralized tissue has been challenged. As a direct interaction between the aragonite crystalline core and the organic matrix is no longer appropriate to describe...
Article
While population foraging behaviour of herbivores has been extensively studied, individual choice is still poorly understood. Very few studies have focused on the individual consistency of foraging behaviour in marine herbivores. Because marine ectotherms are strongly influenced by their environment and because a mixed diet is appropriate for herbi...
Article
Ocean acidification (OA) and its subsequent changes in seawater carbonate chemistry are threatening the survival of calcifying organisms. Due to their use of calcium carbonate to build their shells, marine molluscs are particularly vulnerable. This study investigated the effect of CO2-induced OA on adult European abalone (Haliotis tuberculata) usin...
Article
Full-text available
Ocean acidification (OA) is a major global driver that leads to substantial changes in seawater carbonate chemistry, with potentially serious consequences for calcifying organisms. Marine shelled molluscs are ecologically and economically important species, providing essential ecosystem services and food sources for other species. Due to their phys...
Article
The commercial culture of Haliotis tuberculata has recently started in Europe. As abalone is herbivorous, the use of local collected algae as feed may appear advantageous. The nutritional value of eight monospecific seaweed diets was studied using Palmaria palmata (Rhodophyta), filamentous algae, mainly Gracilaria sp. (Rhodophyta), Enteromorpha sp....
Article
Domestication of Haliotis tuberculata has only recently begun. During the process, we expect that behavioural and physiological traits may evolve to become more adapted to their captive environment. These modifications may result from intentional selection of production traits or unconscious and unintentional selection due to conditions experienced...
Article
Full-text available
The hemolymph of healthy marine invertebrates is known to harbor antibiotic-producing bacteria belonging to the genus Pseudoalteromonas. Such strains are potential probiotics to control infectious diseases in aquaculture. In the present study, we screened a collection of Pseudoalteromonas strains isolated from the hemolymph of oyster and mussel for...
Article
Ocean acidification is a major global stressor that leads to substantial changes in seawater carbonate chemistry, with potentially significant consequences for calcifying organisms. Marine shelled mollusks are ecologically and economically important species providing essential ecosystem services and food sources for other species. Because they use...
Article
Full-text available
Background Holobionts have a digestive microbiota with catabolic abilities allowing the degradation of complex dietary compounds for the host. In terrestrial herbivores, the digestive microbiota is known to degrade complex polysaccharides from land plants while in marine herbivores, the digestive microbiota is poorly characterized. Most of the latt...
Article
Full-text available
Selective breeding strategies require pedigree information over generations, but many species produced in aquaculture are too small to be physically tagged at early stages. Consequently, maintaining a sufficient number of separate families is often needed but costly and logistically difficult. Alternatively, parentage assignment can be obtained usi...
Article
Farming, and thus the domestication of Haliotis tuberculata, began recently. We compared the responses of unselected farmed and wild abalone to stressors that occur on farms. The aim was to determine if the farm environment had induced differences in the behavioural or physiological performances of the abalone. Thirty hatchery-born 3.5 year-old aba...
Article
Abalone growth rate is often identified among important traits to improve through selective breeding. However, the rapid success of some selective breeding plans has sometimes led to negative effects in some aquaculture species due to trade-offs. One of them is the loss of homeostasis of selected animals which results in the inability to resist the...
Article
This study aimed to investigate the environmental controls on the oxygen isotope composition of shells of the European abalone, Haliotis tuberculata. Seasonal δ18O profiles from the outer prismatic layer of four abalone shells, collected live in northwest Brittany (France) in 2002 and 2012, were compared to local temperatures and salinities. Accord...
Article
Full-text available
The shell of the European abalone Haliotis tuberculata is a model for studying mechanisms of mollusc shell formation, but the early steps of shell formation and calcification remain poorly documented. The microstructure and the mineralogical and geochemical composition of larval and juvenile shells were investigated by scanning electron microscopy,...
Article
Full-text available
Increasing temperature of seawater is often associated with increased exposure incidence of disease in field and in aquaculture populations. Numerous episodic mass mortalities of the abalone Haliotis tuberculata have been observed along the northern Brittany coast of France caused by a complex interaction between the host, patho- gen and environmen...
Article
Full-text available
Wild or farmed abalone are regularly exposed to stressors, such as air exposure and handling. Immune and transcriptional responses as well as susceptibility to vibriosis of sexually mature or immature European abalone acclimated at 16 or 19°C were determined following handling or air exposure. Hemocyte density and H2O2 production increased while he...
Article
Full-text available
The abalone Haliotis scalaris deposits two fine rings a year in the spire, one in about December and the other from May to July, corresponding roughly to summer and winter sea temperature extremes. Additional fine rings, and in particular brown rings, are deposited in response to boring annelids and drilling muricid gastropods. Multiple regression...
Article
Full-text available
The decline of European abalone Haliotis tuberculata populations has been associated with various pathogens including bacteria of the genus Vibrio. Following the summer mortality outbreaks reported in France between 1998 and 2000, Vibrio harveyi strains were isolated from moribund abalones, allowing in vivo and in vitro studies on the interactions...
Article
Full-text available
Settlement of Haliotis tuberculata coccinea larvae was examined in the presence of crustose coralline algae (CCA), Ulvella lens, and Ulva rigida. Germlings of the 2 green macroalgae of different age, enrichment level, and in combination were tested as settlement cues, and CCA was tested as a positive control. Larval settlement was the highest on CC...
Article
The European abalone Haliotis tuberculata is of economical importance in Europe, and recently in France where most of the consumed abalones remained wild animals fished on the coast. Recently, the creation of hatcheries allowed the production of cultured animals, and aquaculture is in progress. To optimize selective breeding programs, different stu...
Article
Full-text available
In recent years, shellfish farming of Haliotis tuberculata, the European abalone, has started in Ireland and France. In general, cold waters protect the gastropod from bacterial and parasitic diseases but the shell colonization by boring polychaetes is an important problem causing a reduction of marketability and growth rate. During this study cond...
Article
Four diatoms species Amphora sp., Navicula incerta, Nitzschia sp. and Proschkinia sp., were tested as food for Haliotis tuberculata coccinea post-larvae. Larvae were settled on Ulvella lens and Ulva rigida germlings at a density of 0.5 larvae cm2 of substrate. Growth and survival, in each dietary treatment, were monitored during ten weeks. Experime...
Article
Full-text available
Analysis of the 18S rDNA sequences of Haliotis tuberculata tuberculata and H. t. coccinea subtaxa identified two different types of 18S rDNA genes and ITS1 regions. These two different genes were also detected in H. marmorata, H. rugosa and H. diversicolor that are separated from H. tuberculata by 5-65 mya. The mean divergence value between type I...
Conference Paper
To sustain harvesting over time, stocks must have compensatory density dependent (CDD) mechanisms. We studied CDD responses in greenlip abalone, at all life stages from settlement to reproduction, using controlled, replicated experiments on farms and in the wild. Settlement of larvae onto suitable algae showed no evidence of CDD, but post-larval mo...
Article
Full-text available
The ormer, Haliotis tuberculata is the only European abalone species commercially exploited. The determination of growth and age in the wild is an important tool for fisheries and aquaculture management. However, the ageing technique used in the past in the field is unreliable. The stable oxygen isotope composition (18O/16O) of the shell depends on...
Article
Since 1998, episodic mass mortality of the abalone Haliotistuberculata has been observed along the northern Brittany coast of France caused by a complex interaction among the host, pathogen and environmental factors. In the present study, abalone were submitted to two successive infections with the pathogen Vibrioharveyi under controlled conditions...
Article
Full-text available
Two subspecies of the European abalone have been morphologically recognized: Haliotis tuberculata tuberculata, present in the North Atlantic, and Haliotis tuberculata coccinea, present in the Canary Islands. Among the different nuclear markers used to differentiate these two subspecies, the sperm lysin gene was the most reliable, leading to a 2.2%...
Article
An integrated study of shell formation was initiated covering the entire life cycle of the marine gastropod Haliotis tuberculata. Shell microstructure, chemistry and mineralogy were investigated by polarized microscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and infra-red (IR) spectroscopy. SEM images of troc...
Conference Paper
Full-text available
Background/Question/Methods Connell asked in 1985 whether initial settlement or post-settlement mortality determines the abundance of marine populations. We have investigated this question for abalone. Post-settlement effects will be most important if they are strongly density-dependent (DD), so that they damp out settlement variation. Studies of...
Article
This article documents the addition of 228 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Anser cygnoides, Apodemus flavicollis, Athene noctua, Cercis canadensis, Glis glis, Gubernatrix cristata, Haliotis tuberculata, Helianthus maximiliani, Laricobius nigrinus, Laricobius rubi...
Article
Larval shell formation was investigated in the European abalone Haliotis tuberculata. Stages of mineralization as well as enzymatic and endocrine biomarkers were monitored throughout larval development, from hatching to post-larval stages. Polarized light microscopy and infrared spectroscopy analyses revealed the presence of crystallized calcium ca...
Article
Full-text available
Correspondance: Molecular Ecology Resources Primer Development Consortium, E-mail: editorial.office@molecolres.com
Article
Two abalone species were described in Senegal by Linnaeus in 1758: Haliotis tuberculata and Haliotis marmorata. The present study investigates differences at the molecular level by comparing 18S rDNA – ITS1 and mitochondrial sequences, in addition to making a morphological description of 35 OTUs from the Senegalese coast. A comparison was made betw...
Article
Vibrio harveyi is a bacterial marine pathogen that can cause fatal disease in a large range of vertebrates and invertebrates, including the commercially important marine gastropod, Haliotis tuberculata. Since 1997, strains of this bacterium have regularly been causing high mortalities in farmed and wild abalone populations. The way in which the pat...
Article
Vibrio harveyi is a marine bacterial pathogen responsible for episodic abalone epidemics associated with massive mortalities in France, Japan, and Australia. The aim of this study was the understanding of a possible role of the p38 MAPK in abalone haemocyte responses towards this bacterium. First, the pathogenicity of different V. harveyi strains w...
Article
Since 1998, Haliotis tuberculata mass mortalities have been occurring regularly in wild abalone populations in France during their reproductive period and in conjunction with seawater summer temperature maxima and Vibrio harveyi presence. To confirm the importance of bacterial exposure, temperature and reproductive status on abalone susceptibility,...
Article
Haliotis tuberculata mortality outbreaks have occurred in France since 1998 and were attributed to a pathogenic Vibrio harveyi. These mortalities were recorded in September, a month with abalone reproduction and characterised by high seawater temperatures. The importance of gonadal maturation and temperature increase on abalone immunity and suscept...
Article
The larval shell of the marine gastropod Haliotis tuberculata was investigated by polarised light microscopy, scanning electron microscopy, Raman microspectroscopy and infra-red spectroscopy. Trochophore and veliger larval sections were used for histological examination of the growing shell and each larval stage was related to the shell development...
Article
Full-text available
This work presents the first detailed microscopic and functional analysis of the haemocytes of an abalone; the European Haliotis tuberculata. It is shown that in contrast to the situation in bivalves, only very few basophilic "granulocytes" could be found and exclusively with a histological stain. Neither flow cytometry, phase contrast observation...
Article
Haliotis tuberculata mortality outbreaks have occurred in France since 1998 and were attributed to a pathogenic Vibrio harveyi. These mortalities were recorded in September, a month with abalone reproduction and characterised by high seawater temperatures. The importance of gonadal maturation and temperature increase on abalone immunity and suscept...
Article
Full-text available
Seeding of hatchery-produced abalone has the potential to enhance or maintain wild populations and ensure the viability of fishing grounds, but survival of outplanted juveniles has been poor in many previous seeding experiments. In our study hatchery produced Haliotis laevigata, age 18 months with a mean size of 28 ± 3 mm, were released at eight si...
Article
Full-text available
Shell disease in the abalone Haliotis tuberculata L. is characterized by a conchiolin deposit on the inner surface of the shell. The gross clinical signs appear similar to the Brown Ring Disease (BRD) of clams. BRD has been extensively described in clams and is known to be responsible for severe mortalities and the collapse of the clam aquaculture...
Chapter
This book contains 18 chapters and provides an international review of periphyton ecology, exploitation and management. The ecological aspect focuses on periphyton structure and function in natural systems while the exploitation aspect covers its nutritive qualities and utilization by organisms, particularly in agriculture. The management aspect co...
Article
Full-text available
Understanding density dependent processes in abalone is important for sustainable management of fisheries, and optimum aquaculture production. Density and food were manipulated to test their interacting effects on the growth and survival of hatchery produced postlarval Haliotis rubra. Feeding and dispersive behavior was also examined. Initial densi...
Article
Full-text available
The ormer (Haliotis tuberculata) occurs from the Senegal coast in the south to the Cotentin peninsula of France in the north. Commercial fisheries currently operate in France and Spain. The French abalone fishery was opened in 1994. Abalone catches are regulated by a permit and quota system. Total Allowable Catch (TAC) was determined by two initial...
Article
Full-text available
In the present study we investigated the use of a green macroalga Ulvella lens on a commercial scale to improve the settlement and early growth of Haliotis rubra larvae. Two conditioning methods were evaluated comparing plates covered with U. lens grown over 4 and 18 days. An average settlement rate of 62% was estimated 3 days after larval release....
Article
Full-text available
Cultured Haliotis laevigata (Donovan), 18 mo old, were tagged and seeded at either high or low densities on boulder reefs (4–6 m depth) at Cape Jervis, South Australia in September 2001. Surveys every 3 mo quantified growth history and a sample was sacrificed in September 2002, prior to the expected spawning season of H. laevigata from this area, t...