Céline Audet

Céline Audet
Université du Québec à Rimouski UQAR | uqar · Institut des Sciences de la Mer de Rimouski (ISMER)

Ph. D.

About

163
Publications
19,659
Reads
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2,956
Citations
Additional affiliations
March 1999 - present
Université du Québec à Rimouski UQAR
November 1987 - March 1999
Education
June 1985 - September 1987
McMaster University, Canada, Hamilton
Field of study
  • Écotoxicology
September 1981 - June 1985
Université Laval, Canada, Québec
Field of study
  • Écophysiologie - Poissons
September 1978 - August 1981
Université du Québec à Montréal, Canada, Montréal
Field of study
  • Histologie

Publications

Publications (163)
Article
Full-text available
Characterizing the extent of genetic differentiation among individuals and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. The Greenland Halibut is one of the main demersal fish species to be commercially exploited in Eastern Canada, and accurate information on geographic...
Article
Full-text available
Epigenetic inheritance can result in plastic responses to changing environments being faithfully transmitted to offspring. However, it remains unclear how epigenetic mechanisms such as DNA methylation can contribute to multigenerational acclimation and adaptation to environmental stressors. Brook charr ( Salvelinus fontinalis ), an economically imp...
Preprint
Full-text available
Epigenetic inheritance can result in plastic responses to changing environments being faithfully transmitted to offspring. However, it remains unclear how epigenetic mechanisms such as DNA methylation can contribute to multigenerational acclimation and adaptation to environmental stressors. Brook charr ( Salvelinus fontinalis ), an economically imp...
Article
Full-text available
Deepwater redfish Sebastes mentella will be among the most important resource-sustaining commercial bottom-fish fisheries in the years to come in the Estuary and Gulf of St. Lawrence (EGSL). In 2011, 2012, and 2013, three strong cohorts were recruited to the stock; their abundance in 2018 was 80 times higher than that of the 1993–2012 period. The m...
Article
Full-text available
Despite the commercial importance of Greenland Halibut (Reinhardtius hippoglossoides), important gaps still persist in our knowledge of this species, including its reproductive biology and sex determination mechanism. Here, we combined single-molecule sequencing of long reads (Pacific Sciences) with chromatin conformation capture sequencing (Hi-C)...
Article
Full-text available
The fate of malachite green and its main metabolite leucomalachite green during thermal treatment was examined in seafood (brook trout and white shrimp) using non-target analysis. Samples were extracted using QuEChERS and analyzed using liquid chromatography coupled with quadruple time of flight mass spectrometry. Malachite green levels were reduce...
Article
Applications of mass spectrometry-based metabolomics in food science have developed fast in the last decade. Sample preparation and data processing are critical in non-target/metabolomic workflows but there is currently no standardized protocol for the development of these methods. The impact of data processing parameters or the inclusion of a diff...
Preprint
Full-text available
Despite the commercial importance of Greenland Halibut ( Reinhardtius hippoglossoides) , important gaps still persist in our knowledge of this species, including its reproductive biology and sex determination mechanism. In this study, we combined single molecule sequencing of long reads (Pacific Sciences) with Chromatin Conformation Capture sequenc...
Article
Understanding biological parameters such as growth patterns, condition, and energy reserves is important for a better understanding of the environmental constraints exerted on fish populations. This is especially true for exploited fish stocks in the current context of climate change. Using biological data collected from 2006 to 2009 during bottom...
Article
Full-text available
To improve survival at early developmental stages (larvae and juveniles) of captive fish species, essential nutrients [i.e., essential fatty acids (EFA)] need to be identified. The physiological needs are likely to be different among species, particularly among those using different thermal habitats, because lipids are largely used to maintain cell...
Article
Spillages at sea of diluted bitumen (dilbit) from oil sands have received little attention until now. To our best knowledge, there are no reports on the impact of a severe exposure to dilbit on the Blue mussel (Mytilus edulis). In this study, adult Blue mussels were exposed to one conventional crude oil (Heidrun) and two dilbits (Cold Lake Blend an...
Article
Full-text available
Understanding the processes shaping population structure and reproductive isolation of marine organisms can improve their management and conservation. Using genomic markers combined with estimation of individual ancestries, assignment tests, spatial ecology, and demographic modelling, we (i) characterized the contemporary population structure, (ii)...
Article
In a context of climate change, understanding the influence of temperature on fish species growth is important for the management of fisheries. The effect of increasing temperature on the growth of juvenile Greenland halibut (Reinhardtius hippoglossoides), a cold-water species, circum-continental in the Arctic, was investigated on juveniles that ha...
Article
Full-text available
Coastal nursery areas are subjected to a wide range of natural and anthropogenic stressors, including global warming, which indirectly influence trophic food webs. A global rarefaction of n-3 polyunsaturated fatty acids (PUFA) in trophic networks is in progress. The aim of this study was to assess the effect of a reduction in the dietary availabili...
Article
Full-text available
The aim of this study was to explore an emerging discipline addressing the impact of anthropogenic noise on larval stages of marine organisms. We assessed the influence of boat noise on the feeding behaviour of the pelagic larvae of winter flounder (Pseudopleuronectes americanus, Walbaum, 1792). The hypothesis was that boat noise influences the fee...
Article
Full-text available
Biodiversity assessment is an important part of conservation management that ideally can be accomplished with noninvasive methods without influencing the structure and functioning of ecosystems. Environmental DNA (eDNA) metabarcoding has provided a promising tool to enable fast and comprehensive monitoring of entire ecosystems, but widespread adopt...
Article
Understanding growth in early life stages is fundamental for commercial fisheries management, but there are few studies dealing with growth trajectory divergences occurring during the juvenile stage. We monitored the growth of individually tagged two-year-old juvenile Greenland halibut captured in the wild and maintained at 4 °C for 17 months. The...
Article
Full-text available
Networks of co-expressed genes produce complex phenotypes associated with functional novelty. Sex differences in gene expression levels or in the structure of gene co-expression networks can cause sexual dimorphism and may resolve sexually antagonistic selection. Here we used RNA-sequencing in the salmonid Brook Charr Salvelinus fontinalis to chara...
Preprint
Full-text available
Networks of co-expressed genes produce complex phenotypes associated with functional novelty. Sex differences in gene expression levels or in the structure of gene co-expression networks can cause sexual dimorphism and may resolve sexually antagonistic selection. Here we used RNA-sequencing in the paleopolyploid salmonid Brook Charr Salvelinus font...
Article
Full-text available
Winter flounder (Pseudopleuronectes americanus) is a benthic flatfish that is economically important for recreational and commercial fishing in North America. In the last twenty years, the species has undergone a drastic decline, mainly due to anthropic influence. The goal of this study was to gain knowledge on habitat preferences and behavior of j...
Article
Carnivorous fishes, such as walleye (Sander vitreus) are nutritionally demanding for fish meal. A promising alternative to marine‐origin fish meal, which supply was stagnant in recent decades, is fish meal derived from undesirable freshwater species, such as white sucker (Catostomus commersoni). To evaluate the relative value of such ingredients, w...
Article
Full-text available
Global climate changes have led to a depletion in omega-3 polyunsaturated fatty acids (n-3 PUFA) in marine phytoplankton that—with food web transfers—could negatively impact fish performance. The aim of this study was to assess the effect of a reduction in the dietary availability of n-3 PUFA on growth performance, organ allometry, and fatty acid c...
Article
Metamorphosis is a critical developmental stage that presents particular challenges in fish aquaculture. The sharp increase in mortality that accompanies this transformation has often been attributed to nutritional deficiencies. Providing live feed (the rotifer Brachionus plicatilis Müller, 1786 and the brine shrimp Artemia salina (Linnaeus, 1758))...
Article
Two dominant krill species Meganyctiphanes norvegica (Sars, 1857) and Thysanoessa raschii (Sars, 1864) coexist in the subarctic waters of lower St. Lawrence Estuary, Canada. Both species perform diel vertical migrations representing often large displacements of ~100–150 m through several temperature regimes. We studied the impact of temperature, a...
Article
Full-text available
Copepods are the main natural food of many marine fish larvae. However, enriched rotifers are the most commonly used live prey in larval rearing. Impacts on the feeding behavior, growth, survival, and fatty acid (FA) composition of winter flounder larvae fed with copepods and rotifers were determined and compared to the FA composition of the two li...
Presentation
The size at maturity of males and females of Greenland halibut has progressively decreased in the Estuary and Gulf of St-Lawrence (EGSL) in the last twenty years. As in many other fish species, decreases in growth rate is observed following sexual maturity. This has direct impacts on the exploitable biomass of Greenland halibut, the fishery being s...
Article
Full-text available
The glass eel stage in American Eel (Anguilla rostrata) marks the onset of the catadromous migration into estuarine or freshwater habitats, and the endocrine mechanisms underlying this habitat selection are still not well understood. Using a candidate genes approach, the aim of this study was to test for different patterns of gene expression relate...
Presentation
Recent studies identified two major nursery areas for Greenland halibut in the Estuary and Gulf of St-Lawrence (EGSL). Despite the low oxygen concentrations in these areas, the growth rate of the juvenile fish is among the highest recorded for this species. Others factors should then compensate for hypoxia conditions low dissolved oxygen as tempera...
Article
Full-text available
Freshwater eels (Anguilla sp.) have large economic, cultural, ecological and aesthetic importance worldwide, but they suffered more than 90% decline in global stocks over the past few decades. Proper genetic resources, such as sequenced, assembled and annotated genomes, are essential to help plan sustainable recoveries by identifying physiological,...
Article
Full-text available
Whole genome duplication can have large impacts on genome evolution. However, much remains unknown about these impacts, such as the mechanisms of coping with a duplicated sex determination system, which may result in increased sex determination mechanism diversity. Sexual conflict (i.e. alleles having different optimums in each sex) can result in s...
Article
Full-text available
In this study, an anadromous strain (L) and a freshwater-resident (R) strain of brook charr Salvelinus fontinalis as well as their reciprocal hybrids, were reared in a common environment and submitted to swimming tests combined with salinity challenges. The critical swimming speeds (Ucrit) of the different crosses were measured in both fresh (FW) a...
Article
The aim of this study was to increase our knowledge about the nutritional needs of walleye (Sander vitreus (Mitchill, 1818)) broodstock. Two dietary treatments were tested: the first consisted of frozen Atlantic mackerel (Scomber scombrus L., 1758) pieces with a supplement of experimental dry pellets and the second consisted of frozen Atlantic mack...
Article
Full-text available
Eggs of Greenland halibut (Reinhardtius hippoglossoides) are subjected to hypoxic conditions in the deep waters of the Estuary and Gulf of St. Lawrence during their development. The aim of this study was to determine whether there was potential remodelling of fatty acids (FA) during embryogenesis in eggs exposed to several levels of dissolved oxyge...
Article
Full-text available
Whole genome duplication (WGD) can provide material for evolutionary innovation. Family Salmonidae is ideal for studying the effects of WGD as the ancestral salmonid underwent WGD relatively recently, around 65 million years ago, then rediploidized and diversified. Extensive synteny between homologous chromosome arms occurs in extant salmonids, but...
Presentation
Full-text available
Recently, different ecotypes characterized by their migration form, have been genetically documented in the American eel, Anguilla rostrata. The aim of this study was to verify if energy status and differential abilities in mobilizing energy reserves could discriminate freshwater and brackish/saltwater ecotypes. To do so, analyses were done on glas...
Poster
Full-text available
The pace-of-life syndrome (POLS) hypothesis1 specifies that closely related species experiencing different ecological conditions should differ in a suite of metabolic traits that have coevolved with the life-history particularities . The notion of POLS finds its roots in the classic concept of r and K-selection. It also extends into the more recent...
Article
The environment experienced by females can have long-lasting effects on offspring phenotype. The objective of this study was to determine if maternal stress-induced behaviour reprogramming in offspring is found in brook char and to test whether cortisol is the main mediator, by separating the potential effects of cortisol from that of other potenti...
Preprint
Full-text available
Whole genome duplication (WGD) can provide material for evolutionary innovation. Assembly of large, outbred eukaryotic genomes can be difficult, but structural rearrangements within such taxa can be investigated using linkage maps. RAD sequencing provides unprecedented ability to generate high-density linkage maps for non-model species, but can res...
Poster
Full-text available
Chez les anguilles d’Amérique, deux phénotypes ont été différenciés génétiquement : écotype d’eau douce dans l’estuaire et le fleuve St Laurent, écotype d’eau salée-saumâtre en Atlantique. Dans le but de clarifier les bases génétiques sous-jacentes de ces écotypes, l’expression de divers gènes a été caractérisée chez des civelles (le stade qui suit...
Article
Greenland Halibut (Reinhardtius hippoglossoides), especially juveniles, are abundant in the St. Lawrence estuary, where oxygen levels are very low (18–25% saturation). Current data suggest that juveniles may be sedentary in this region. We investigated the relative importance of oxygen for juvenile growth in different areas occupied by juveniles in...
Article
Full-text available
The two primary ways that species respond to heterogeneous environments is through local adaptation and phenotypic plasticity. The American eel (Anguilla rostrata) presents a paradox; despite inhabiting drastically different environments [1], the species is panmictic [2, 3]. Spawning takes place only in the southern Sargasso Sea in the Atlantic Oce...
Article
Full-text available
Freshwater eels Anguilla spp. are declining worldwide, and a major challenge is understanding why these panmictic species show contrasting patterns of intraspecific phenotypic variation and recruitment. We present results on studies of the American Eel A. rostrata to understand and discriminate the effects of origin and plasticity on growth and sex...
Conference Paper
Full-text available
American eel (Anguilla rostrata) reproduce in a single panmictic population in the Sargasso Sea in the Atlantic Ocean. After hatching, they migrate as leptocephali to a large diversity of salt, brackish, and freshwater habitats in Eastern North America. Despite panmixia, there are extreme differences in morphology, growth rate, and sex ratio by rea...
Conference Paper
In recent years, freshwater, estuarine, and marine ecotypes have been described in different eel species. The aim of this study was to better understand the physiological regulation of migration at the glass eel stage in American eel, Anguilla rostrata. We hypothesized that the hormonal status would differ between glass eels exhibiting different ec...
Conference Paper
Maternal effects can have a strong impact on offspring growth and survival in fish. Maternal factors, such as mRNA, proteins, and hormones, are deposited in oocytes during sexual maturation. Stressed females produce eggs with higher levels of glucocorticoid hormones, which play key roles in the stress response and are known to have wide-ranging dev...
Conference Paper
Despite the collapse in abundance of the American eel (Anguilla rostrata) in the upper St. Lawrence River, little remains known about the influence of environmental cues on habitat selection by glass eels (juveniles) and how this distribution affects growth. Glass eel’s salinity preference and locomotor activity were assessed in 4 rivers across eas...
Conference Paper
Greenland halibut (Reinhardtius hippoglossoides) eggs are subjected to low oxygen levels in the deep waters of the Estuary and Gulf of St. Lawrence during their development. The aim of this study was to determine the influence of different levels of dissolved oxygen (DO) on the fatty acid (FA) composition in Greenland halibut eggs. Fertilized eggs...
Article
Full-text available
The commensal microbiota of fish skin is suspected to provide a protection against opportunist infections. The skin of fish harbors a complex and diverse microbiota that closely interacts with the surrounding water microbial communities. Up to now there is no clear evidence as to whether the host regulates the recruitment of environmental bacteria...
Article
The aim of this study was to evaluate the effect of a dietary highly unsaturated fatty acid (HUFA) deficiency on winter flounder Pseudopleuronectes americanus metamorphosis by examining the growth and the expression of genes involved in some key metabolic processes: lipid digestion, oxidative stress, and growth. Three groups of fish were fed rotife...
Article
Full-text available
Interactions between bacteria and their host represent a full continuum from pathogenicity to mutualism. From an evolutionary perspective, host-bacteria relationships are no longer considered a two-component system but rather a complex network. In this study, we focused on the relationship between brook charr (Salvelinus fontinalis) and bacterial c...
Poster
Full-text available
La civelle est le stade-recrutement de l’espèce : elle colonise soit les eaux douces (forme migratrice) soit les eaux salées-saumâtres (forme résidente). La civelle migrant à jeun, puise dans ses réserves énergétiques subsistantes de la leptocéphale. Pour soutenir leur migration en eau douce jusqu’à 500km dans le système du St Laurent, les civelles...