17 results on '"Lola Toomey"'
Search Results
2. Impact of temperature on Downs herring (Clupea harengus) embryonic stages: First insights from an experimental approach
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Lola Toomey, Carolina Giraldo, Christophe Loots, Kélig Mahé, Paul Marchal, and Kirsteen MacKenzie
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Multidisciplinary - Abstract
Among all human-induced pressures, ocean warming is expected to be one of the major drivers of change in marine ecosystems. Fish species are particularly vulnerable during embryogenesis. Here, the impact of temperature was assessed on embryonic stages of Atlantic herring (Clupea harengus), a species of high socio-economic interest, with a particular focus on the under-studied eastern English Channel winter-spawning component (Downs herring). Key traits linked to growth and development were experimentally evaluated at three temperatures (8°C, 10°C and 14°C), from fertilization to hatching, in standardized controlled conditions. Overall negative impacts of increased temperature were observed on fertilization rate, mean egg diameter at eyed stage, hatching rate and yolk sac volume. A faster developmental rate and a change in development stage frequency of newly hatched larvae were also observed at higher temperature. Potential parental effects were detected for four key traits (i.e. fertilization rate, eyed survival rate, mean egg diameter and hatching rate), despite a limited number of families. For instance, a large variability among families was shown in survival rate at eyed stage (between 0 and 63%). Potential relationships between maternal characteristics and embryo traits were therefore explored. We show that a substantial proportion of variance (between 31 and 70%) could be explained by the female attributes considered. More particularly, age, traits linked to life history (i.e. asymptotic average length and Brody growth rate coefficient), condition and length were important predictors of embryonic key traits. Overall, this study constitutes a stepping-stone to investigate potential consequences of warming on Downs herring recruitment and provides first insights on potential parental effects.
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- 2023
3. AquaDesign: A tool to assist aquaculture production design based on abiotic requirements of animal species
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Grégoire Butruille, Marielle Thomas, Alain Pasquet, Nellya Amoussou, Lola Toomey, Axel Rosenstein, Sandrine Chauchard, and Thomas Lecocq
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Multidisciplinary ,Animals ,Agriculture ,Fresh Water ,Aquaculture - Abstract
Farming new species and promoting polyculture can enhance aquaculture sustainability. This implies to define the rearing conditions that meet the ecological requirements of a target species and/or to assess if different species can live in the same farming environment. However, there is a large number of rearing conditions and/or taxon combinations that can be considered. In order to minimise cumbersome and expensive empirical trials to explore all possibilities, we introduce a tool, AquaDesign. It is based on a R-script and package which help to determine farming conditions that are most likely suitable for species throughin silicoassessment. We estimate farming conditions potentially suitable for an aquatic organism by considering the species niche. We define the species n-dimensional niche hypervolume using a correlative approach in which the species niche is estimated by relating distribution data to environmental conditions. Required input datasets are mined from several public databases. The assistant tool allows users to highlight (i) abiotic conditions that are most likely suitable for species and (ii) combinations of species potentially able to live in the same abiotic environment. Moreover, it offers the possibility to assess if a particular set of abiotic conditions or a given farming location is potentially suitable for the monoculture or the polyculture of species of interest. Our tool provides useful pieces of information to develop freshwater aquacultures. Using the large amount of biogeographic and abiotic information available in public databases allows us to propose a pragmatic and operational tool even for species for which abiotic requirements are poorly or not available in literature such as currently non-produced species. Overall, we argue that the assistant tool can act as a stepping stone to promote new aquatic productions which are required to enhance aquaculture sustainability.
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- 2022
4. Constant darkness negatively affects the outcome of hormonally induced reproduction in cultured Eurasian perch females
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Katarzyna Dryl, Daniel Żarski, Sylvain Milla, Pascal Fontaine, Beata Sarosiek, Piotr Gomułka, Lola Toomey, J. Król, Katarzyna Palińska-Żarska, Yannick Ledoré, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Stanislaw Sakowicz Inland Fisheries Institute, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Warmia and Mazury [Olsztyn], and European Project: 652831,H2020,H2020-INFRAIA-2014-2015,AQUAEXCEL2020(2015)
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Ovulation ,media_common.quotation_subject ,Broodstock ,Stress ,Acclimatization ,SF1-1100 ,Gonadotropin-Releasing Hormone ,Animal science ,Controlled reproduction ,[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology ,Animals ,ComputingMilieux_MISCELLANEOUS ,media_common ,photoperiodism ,Perch ,biology ,Reproduction ,Darkness ,biology.organism_classification ,Eurasian perch ,Animal culture ,Hormonal stimulation ,Perches ,Animal Science and Zoology ,Female ,Gonadotropins ,Hormone - Abstract
International audience; This study aimed to assess the effect of constant darkness applied to fish during controlled breeding on reproductive traits in domesticated females of Eurasian perch. Based on the assumption that keeping fish in constant darkness during the reproduction operation may reduce stress, suspected to be responsible for variable spawning effectiveness in this species. Two conditions were assessed (16 h light per day [group 16L] and constant darkness [group 0L], two tank replicates per condition). The reproductive protocol involved a 7-day-long adaptation period for group 0L where photoperiod was reduced by 2.3 h a day down to constant darkness. After the adaptation period, two hormone injections (salmon gonadoliberin analogue) were applied to both groups: priming (10 mu g/kg) and resolving (25 mu g/kg) with a 7-day interval between them. During the study, morphometric indices were recorded and blood, brain, and pituitary samples were collected to assess stress markers and determine hypothalamic-pituitary-gonadal axis functioning via measuring blood plasma hormones, as well as gonadoliberin and gonadotropins (luteinising hormone [LH] and follicle-stimulating hormone [FSH]) transcript abundance (n = 7 for each group at each sampling point). In addition, kinetics of the final oocyte maturation (FOM) process, ovulation rate, and egg quality of each group was monitored (n = 12 for each group). The results indicated that there were no differences in terms of morphometry, FOM kinetics, and most stress indices between groups throughout the experiment, except haematocrit, which increased immediately following the acclimation period in fish kept in darkness. Constant darkness negatively affected plasma levels of 17 alpha,20 beta-dihy droxy-4-pregnen-3-one (DHP) and LH transcript expression at the time of the second hormone injection. This indicated that exposure to constant darkness negatively affected priming of the hormonal dose applied, resulted in the disruption of ovulation, and reduced ovulation rates (50%) for group 0L, as compared to 16L (91%). The findings of this study clearly indicate that constant darkness may have significant deleterious effects on reproductive traits throughout out-of-season induced, hormonally supported, controlled reproduction. Therefore, we advise against the use of constant darkness when managing broodstock reproduction in domesticated Eurasian perch.
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- 2021
5. Seeking for the inner potential: comparison of larval growth rate between seven populations of Perca fluviatilis
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Radek Gebauer, Bořek Drozd, Martin Bláha, Lola Toomey, Thomas Lecocq, Jan Kouřil, Tatyana Vanina, and Vlastimil Stejskal
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Larva ,education.field_of_study ,business.industry ,Fish farming ,Population ,Allopatric speciation ,Zoology ,Aquatic Science ,Biology ,Fish stock ,Intraspecific competition ,Aquaculture ,Trait ,business ,education ,Agronomy and Crop Science - Abstract
Larval rearing is a crucial step in fish production. However, issues in larval production, such as low growth/survival rate, impede the aquaculture development of many species including Perca fluviatilis. Since allopatric populations of P. fluviatilis exhibit different growth rates for first-life stages, basing fish stocks on populations displaying optimal features in aquaculture conditions could overcome some of these issues. Here, we (i) compare the growth rate in standardised re-circulating aquaculture system conditions and (ii) assess the genetic differentiation using four mitochondrial markers between seven allopatric populations. Our results confirm that key features for aquaculture can vary at the intraspecific level. However, we do not highlight any clear aquaculture trait differences related to genetic differentiation. Therefore, we cannot assess the genetic basis of growth rate differentiation between populations. This paves the way to future studies on aquaculture performances of genetically distinct populations in P. fluviatilis.
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- 2019
6. Unlocking the intraspecific aquaculture potential from the wild biodiversity to facilitate aquaculture development
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Lola Toomey, Thomas Lecocq, Pascal Fontaine, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), and Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Fish farming ,Intraspecific differentiation ,Biodiversity ,Management, Monitoring, Policy and Law ,Aquatic Science ,Biology ,Intraspecific competition ,Domestication ,03 medical and health sciences ,Aquaculture ,Multi trait ,14. Life underwater ,030304 developmental biology ,0303 health sciences ,Ecology ,business.industry ,[SDV.BA]Life Sciences [q-bio]/Animal biology ,Multi-function ,04 agricultural and veterinary sciences ,Sustainability ,Fish culture ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Multi-trait ,business ,[SDV.AEN]Life Sciences [q-bio]/Food and Nutrition - Abstract
International audience; Domestication of new candidate species remains a long and difficult process often resulting in unfruitful attempts. Early steps in most domestication programs often consider species as a unity, disregarding a part of the biodiversity: the wild intraspecific geographic differentiation. Yet, this differentiation can shape local specificities, which could lead to different domestication predisposition or socioeconomic attractiveness between populations. Therefore, considering this population-specific potential could facilitate domestication and subsequent production of new candidate species. Here, we propose a three-step integrative approach to standardize and facilitate new domestication attempts by taking advantage of wild geographic differentiation. The step 1 consists in classifying the wild biodiversity to identify prospective units (i.e. groups of differentiated allopatric populations). The step 2 allows comparing performances of these units in standardized conditions (i.e. rearing system) through a multi-function and multi-trait assessment. Finally, the step 3 highlights units with higher aquaculture potentials through the calculation of an aquaculture potential score. This approach, here applied to fish culture for human consumption, also aims at being extended to other taxa (e.g. crustaceans, molluscs) and other production goals.
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- 2020
7. Getting off on the right foot: Integration of spatial distribution of genetic variability for aquaculture development and regulations, the European perch case
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Zbigniew Kaczkowski, Lola Toomey, Thomas Lecocq, Tatyana Vanina, Simon Dellicour, Fabrice Teletchea, Josephine Pegg, Martin Bláha, Jan Kouřil, Pascal Fontaine, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), University of South Bohemia, University Centre Sparsholt, University of Lódź, and Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Distribution (economics) ,[SDV.SA.ZOO]Life Sciences [q-bio]/Agricultural sciences/Zootechny ,Aquatic Science ,Biology ,Spatial distribution ,Geographic differentiation ,Genetic diversity ,03 medical and health sciences ,Aquaculture ,14. Life underwater ,Genetic variability ,Océanographie biologique ,030304 developmental biology ,0303 health sciences ,business.industry ,Production ,04 agricultural and veterinary sciences ,Perca fluviatilis ,Management ,Evolutionary biology ,Agriculture ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Microsatellite ,Common spatial pattern ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,business - Abstract
Knowledge of spatial genetic variability patterns allows improving conservation actions, translocation regulations, and farming productivity. However, these genetic variability patterns are often considered after issues are observed, long after the beginning of production. By taking into account lessons from other species, we investigate the genetic variability of Perca fluviatilis, a species at a nascent stage of production. The genetic variability has been previously studied but, due to discrepancies between conclusions and methodological limits, the spatial distribution of genetic variability in P. fluviatilis has not been demonstrated conclusively. Here, we characterise the genetic variability across 84 West-Palaearctic sampling sites using mitochondrial and microsatellite markers. We aim to provide (i) a genetically-based population structure that could act as an impetus for further production improvement and (ii) guidelines for translocation regulations. Our analyses show an uneven distribution of genetic variability. Based on inter-populational genetic differentiation, we identify five large geographic scale clusters which are further divided into several subgroups. Local genetic diversity mapping highlights a spatial pattern with several hotspots, which has serious implications in the development of appropriate regulations of translocations. Moreover, we here report an association between genetic differentiations and previously reported zootechnical performances. We ultimately propose guidelines for further investigations of population-specific performances in aquaculture and potentially efficient regulations for policy-makers., SCOPUS: ar.j, info:eu-repo/semantics/published
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- 2020
8. When behavioural geographic differentiation matters: inter-populational comparison of aggressiveness and group structure in the European perch
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Margot Baratçabal, Sami Vesala, Tatyana Vanina, Alain Pasquet, Yannick Ledoré, Martin Bláha, Lola Toomey, Thomas Lecocq, Pascal Fontaine, Emilie Mauduit, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), University of South Bohemia, Natural Resources Institute Finland (LUKE), and Centre National de la Recherche Scientifique (CNRS)
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0106 biological sciences ,Perch ,biology ,010604 marine biology & hydrobiology ,Intraspecific differentiation ,04 agricultural and veterinary sciences ,Aquaculture ,Aquatic Science ,biology.organism_classification ,01 natural sciences ,Perca fluviatilis ,Group structure ,Aggression ,Geography ,Larvae ,Social structure ,[SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Cannibalism ,Behaviour ,14. Life underwater ,Agronomy and Crop Science ,Demography - Abstract
International audience; Domestication is still a long and difficult process and it is particularly impacted by species behavioural traits. Indeed, tolerance to high densities in intensive cultures and sociability are major features which facilitate domestication and influence the effectiveness of aquaculture production. Moreover, behavioural domestication predispositions could change at the intraspecific level. Here, we investigate three essential behavioural traits: aggressive interactions, group structure and activity between three allopatric populations of Perca fluviatilis, a fish species at its nascent stage of production. We highlight inter-populational differences in group structure and aggressive interactions but not in activity. A more cohesive and homogeneous group structure was demonstrated for Finnish populations compared to Lake Geneva at 45-46 days post-hatching. In addition, Lake Geneva presented a higher aggressiveness. These inter-populational differences could be used in European perch aquaculture in order to improve production as well as welfare of individuals.
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- 2019
9. Genetic and aquaculture performance differentiation among wild allopatric populations of European perch (Percidae, Perca fluviatilis)
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Martin Bláha, Radek Gebauer, Marcellin Rutegwa, Jan Kouřil, Tatyana Vanina, Vlastimil Stejskal, Lola Toomey, Thomas Lecocq, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Faculty of Fisheries and Protection of Waters [University of South Bohemia], and Université de Lorraine (UL)-Institut National de la Recherche Agronomique (INRA)
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0303 health sciences ,Perch ,biology ,business.industry ,Cannibalism ,Allopatric speciation ,Zoology ,Aquatic animal ,04 agricultural and veterinary sciences ,Broodstock ,Aquatic Science ,biology.organism_classification ,Transplantation ,03 medical and health sciences ,Percidae ,Aquaculture ,[SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,14. Life underwater ,business ,030304 developmental biology - Abstract
International audience; Present research suggests that phenotypic variations and consequent potential differences in suitability for commercial culture are more likely to occur among genetically diverse populations. We investigated diversity in traits important to aquaculture and assessed genetic differentiation based on four mitochondrial markers in three European populations of Perca fluviatilis. Using a transplant approach to standardize conditions and minimize environmental effects on phenotype expression, we compared survival, cannibalism, growth rate, growth het-erogeneity, and specific growth rate of the populations to assess whether difference in aquaculture performance (i.e. expression of phenotypical traits that facilitate the rearing of fish and impact the productivity of the farming) is more likely between genetically differentiated populations than between genetically similar populations. We found key traits of performance to differ among allopatric populations, suggesting value in considering geographic source of broodstock. The largest aquaculture performance disparities were observed among genetically differentiated populations. Some lesser differences were observed between allopatric genetically similar populations, possibly the consequence of pre-collection environment, or transgenerational effects.
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- 2019
10. Integration of spatial distribution of genetic variability for aquaculture regulations and development, the European perch case
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Pascal Fontaine, Lola Toomey, Thomas Lecocq, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), and Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL)
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[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,0106 biological sciences ,Global and Planetary Change ,Perch ,010504 meteorology & atmospheric sciences ,biology ,business.industry ,[SDV.BA]Life Sciences [q-bio]/Animal biology ,010604 marine biology & hydrobiology ,Ocean Engineering ,Aquatic Science ,Oceanography ,biology.organism_classification ,Spatial distribution ,01 natural sciences ,Fishery ,Aquaculture ,14. Life underwater ,Genetic variability ,business ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,Water Science and Technology - Abstract
International audience
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- 2019
11. Domestication may affect the maternal mRNA profile in unfertilized eggs, potentially impacting the embryonic development of Eurasian perch (Perca fluviatilis)
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Tainá, Rocha de Almeida, Maud, Alix, Aurélie, Le Cam, Christophe, Klopp, Jérôme, Montfort, Lola, Toomey, Yannick, Ledoré, Julien, Bobe, Dominique, Chardard, Bérénice, Schaerlinger, Pascal, Fontaine, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Laboratoire de Physiologie et Génomique des Poissons (LPGP), Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de la Recherche Agronomique (INRA), Unité de Mathématiques et Informatique Appliquées de Toulouse (MIAT INRA), Institut National de la Recherche Agronomique (INRA), French National Research Agency ANR - http://www. agence-nationale-recherche.fr/ (Maternal Legacy ANR-13-BSV7-0015 to JB) and by the INRA PHASE department (http://www.phase.inra.fr/) and Lorraine Region. TRA’s fellowship was provided by the Brazilian National Council for Scientific and Technological Development - http://www.cnpq.br/ (CNPq - 233389/2014-8). MA and LT’s fellowships were provided by the French Ministry of Research (http://www.enseignementsup-recherche.gouv.fr/), and ANR-13-BSV7-0015,Maternal Legacy,Portait moléculaire d'un oeuf de poisson de bonne qualité(2013)
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Sexual Reproduction ,Embryology ,Spawning ,Physiology ,Microarrays ,Animal Types ,Science ,[SDV]Life Sciences [q-bio] ,Fisheries ,Modes of Reproduction ,Embryonic Development ,Gene Expression ,Aquaculture ,Research and Analysis Methods ,Domestication ,Oogenesis ,Reproductive Physiology ,Genetics ,Medicine and Health Sciences ,Animals ,Domestic Animals ,[INFO]Computer Science [cs] ,Ovum ,Embryos ,Organisms ,Biology and Life Sciences ,Eukaryota ,Computational Biology ,Agriculture ,Genomics ,Genome Analysis ,RNA, Messenger, Stored ,Bioassays and Physiological Analysis ,Perches ,Medicine ,Fish Farming ,Transcriptome ,Zoology ,Transcriptome Analysis ,Research Article ,Developmental Biology - Abstract
International audience; Domestication is an evolutionary process during which we expect populations to progressively adapt to an environment controlled by humans. It is accompanied by genetic and presumably epigenetic changes potentially leading to modifications in the transcriptomic profile in various tissues. Reproduction is a key function often affected by this process in numerous species, regardless of the mechanism. The maternal mRNA in fish eggs is crucial for the proper embryogenesis. Our working hypothesis is that modifications of maternal mRNAs may reflect potential genetic and/or epigenetic modifications occurring during domestication and could have consequences during embryogenesis. Consequently, we investigated the trancriptomic profile of unfertilized eggs from two populations of Eurasian perch. These two populations differed by their domestication histories (F1 vs. F7+–at least seven generations of reproduction in captivity) and were genetically differentiated (FST = 0.1055, p
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- 2019
12. Finding a rare gem: Identification of a wild biological unit with high potential for European perch larviculture
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Pascal Fontaine, Lola Toomey, Thomas Lecocq, Alain Pasquet, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), and Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Fish farming ,Population ,Allopatric speciation ,Zoology ,Aquaculture ,Aquatic Science ,Intraspecific competition ,Domestication ,03 medical and health sciences ,Intraspecific ,14. Life underwater ,education ,Swim bladder inflation ,030304 developmental biology ,0303 health sciences ,education.field_of_study ,Perch ,biology ,business.industry ,04 agricultural and veterinary sciences ,biology.organism_classification ,Perca fluviatilis ,Differentiation ,[SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Multi-trait ,business - Abstract
International audience; Potential for aquaculture can differ among allopatric wild populations of a species of interest. This make relevant to seek best candidates for fish farming at the intraspecific level. Here, we compare the aquaculture potential among allopatric population groups of the European perch, a species of interest for fish farming. More specifically, we aim at finding population groups with the best performance in larviculture through an integrative approach that allows considering geographic differentiation in domestication processes. A multi-function/trait assessment was performed on three genetically differentiated groups of European perch populations: (i) Danube, (ii) Eastern Europe, and (iii) European Plain. A geographic differentiation was highlighted for six important traits for perch larviculture: survival rate, swim bladder inflation rate, deformity rate, length at hatching, mean of interindividual distances, and change in activity following a stress event. Along with fish farmer-advice-based weighting of the traits, the calculation of an aquaculture potential score allowed identifying the populations from the Danube region as the most interesting to potentially overcome current bottleneck in European perch larviculture.
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- 2021
13. Genetic structure of Patagonian toothfish populations from otolith DNA
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Lola Toomey, Bruce E. Deagle, Mark Belchier, Dirk Welsford, Andrea M. Polanowski, Cassandra Faux, Sharon A. Appleyard, Simon N. Jarman, James R. Marthick, Australian Antarctic Division (AAD), Australian Government, Department of the Environment and Energy, CSIRO National Research Collections, British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Menzies Research Institute Tasmania, University of Tasmania, Hobart, Tasmania, Australia, and University of Tasmania [Hobart, Australia] (UTAS)
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0301 basic medicine ,Dissostichus ,[SDV]Life Sciences [q-bio] ,Species distribution ,Population genetics ,Oceanography ,DNA sequencing ,high throughput sequencing ,Dissostichus eleginoides ,single nucleotide polymorphisms ,03 medical and health sciences ,medicine ,14. Life underwater ,Ecology, Evolution, Behavior and Systematics ,Otolith ,biology ,Ecology ,population genetics ,Geology ,biology.organism_classification ,030104 developmental biology ,medicine.anatomical_structure ,Evolutionary biology ,Genetic structure ,Spatial ecology ,Antarctic ,Fisheries management - Abstract
The Patagonian toothfish, Dissostichus eleginoides, is a valuable fishery species and has a discontinuous distribution across the Southern Ocean. Identification of the genetic stock structure of toothfish would allow evaluation of the suitability of the spatial scale at which fisheries management operates. Genetic subdivision seems likely given the species distribution. Population genetics studies of this species have been performed; however, they have been limited by sample size, spatial coverage and/or the type of markers investigated. As a potential solution, we developed methods for extracting toothfish DNA from otoliths that are available in large numbers from collections held at several research institutes. Genetic differentiation between the three oceanic sectors was investigated. Four mitochondrial and four nuclear markers with multiple single nucleotide polymorphisms were sequenced by high throughput sequencing for samples from six locations. Genetic differentiation was found between three sectors with nuclear markers. However, only the Pacific sector was differentiated from other sectors with mitochondrial markers. This study demonstrates the usefulness of otolith DNA as a means of increasing sample sizes for population genetics research of fish. Additionally, the combination of nuclear and mitochondrial markers may allow insight into how the observed differences in movements between male and female toothfish impact population structure.
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- 2016
14. Omura's whale off West Africa: autochthonous population or inter-oceanic vagrant in the Atlantic Ocean?
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Zein El Abidine Ould Sidaty, Abdellahi Samba Ould Bilal, Frédéric Marret, Jean-Luc Jung, Koen Van Waerebeek, Eléonore Méheust, Lola Toomey, Moulaye Mohamed Wagne, Wim C. Mullié, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Laboratoire de Biologie et génétique des mammifères marins dans leur environnement (BioGEMME), Université de Brest (UBO), Cetean Conservation Medicine Group (CMED), and Cetacean Conservation Medicine Group-CEPEC/Museo de Delfines
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0106 biological sciences ,0301 basic medicine ,Range (biology) ,Population ,Aquatic Science ,[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy ,Oceanography ,010603 evolutionary biology ,01 natural sciences ,DNA barcoding ,West africa ,03 medical and health sciences ,Marine mammal ,biology.animal ,14. Life underwater ,education ,ComputingMilieux_MISCELLANEOUS ,Ecology, Evolution, Behavior and Systematics ,education.field_of_study ,biology ,Whale ,biology.organism_classification ,Omura's whale ,Fishery ,[SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics ,030104 developmental biology ,Rorqual - Abstract
The surveillance of marine mammal strandings within the framework of a biomonitoring scheme for the Mauritanian coast led to the discovery in 2013 of a 3.98 m long, juvenile rorqual Balaenoptera sp. in an advanced state of decomposition near Chott Boul (16°32.488′N, 016°27.0317′W). Photographs and skin samples were taken, but the specimen could not be collected. Based on limited morphological evidence, only Balaenoptera edeni and B. omurai were plausible. Sequences of three mtDNA regions, i.e. parts of the cox1 and the cytb genes as well as the D-loop, for a total of 2636 bp (> 16% of the mitogenome) identified the specimen as an Omura's whale, B. omurai, the first record in the Atlantic Ocean and at least 11,400 km away from its closest known range in the SW Indian Ocean (Madagascar). The question of whether the specimen is a vagrant or belongs to an unrecognized Atlantic population is discussed. Advection by currents or transport on a ship's bow bulb following collision are discarded. Circumstan...
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- 2015
15. Correction to: When behavioural geographic differentiation matters: inter-populational comparison of aggressiveness and group structure in the European perch
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Lola Toomey, Martin Bláha, Emilie Mauduit, Tatyana Vanina, Margot Baratçabal, Yannick Ledoré, Sami Vesala, Pascal Fontaine, Alain Pasquet, Thomas Lecocq, Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA), Université de Lorraine (UL)-Institut National de la Recherche Agronomique (INRA), Faculty of Fisheries and Protection of Waters [University of South Bohemia], University of South Bohemia, Natural Resources Institute Finland (LUKE), and Centre National de la Recherche Scientifique (CNRS)
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0303 health sciences ,03 medical and health sciences ,0302 clinical medicine ,[SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies ,Aquatic Science ,Agronomy and Crop Science ,ComputingMilieux_MISCELLANEOUS ,030217 neurology & neurosurgery ,030304 developmental biology - Abstract
International audience
- Published
- 2019
16. Responses of the arcto-boreal krill species Thysanoessa inermis to variations in water temperature: coupling Hsp70 isoform expressions with metabolism
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Chi Ying Lee, Friedrich Buchholz, Kévin Cascella, Jean Toullec, Lola Toomey, Erwan Corre, Kim Huenerlage, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Adaptation et Biologie des Invertébrés en Conditions Extrêmes (ABICE), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Department of Biology, and National Changhua University of Education
- Subjects
0301 basic medicine ,Thysanoessa ,Krill ,Thysanoessa inermis ,Population ,Thysanoessa raschii ,Metabolic rate ,Biochemistry ,Latitude ,03 medical and health sciences ,Respirometry ,Respiration ,Botany ,Animals ,Protein Isoforms ,HSP70 Heat-Shock Proteins ,14. Life underwater ,Amino Acid Sequence ,education ,Phylogeny ,education.field_of_study ,Original Paper ,biology ,Sequence Analysis, RNA ,Temperature ,High-Throughput Nucleotide Sequencing ,Water ,Cell Biology ,Metabolism ,biology.organism_classification ,[SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology ,Kinetics ,030104 developmental biology ,Heat shock ,13. Climate action ,RNA ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Transcriptome ,Sequence Alignment ,Euphausiacea ,Hsp70 expression - Abstract
International audience; Recent studies have indicated a metabolic temperature sensitivity in both the arcto-boreal krill species Thysanoessa inermis and Thysanoessa raschii that may determine these species’ abundance and population persistence at lower latitudes (up to 40° N). T. inermis currently dominates the krill community in the Barents Sea and in the high Arctic Kongsfjord. We aimed to increase the knowledge on the upper thermal limit found in the latter species by estimating the CT50 value (19.7 °C) (critical temperature at which 50 % of animals are reactive) and by linking metabolic rate measurements with molecular approaches. Optical oxygen sensors were used to measure respiration rates in steps of 2 °C (from 0 to 16 °C). To follow the temperature-mediated mechanisms of passive response, i.e., as a proxy for molecular stress, molecular chaperone heat shock protein 70 (Hsp70) sequences were extracted from a transcriptome assembly, and the gene expression kinetics were monitored during an acute temperature exposure to 6 or 10 °C with subsequent recovery at 4 °C. Our results showed upregulation of hsp70 genes, especially the structurally constitutive and mitochondrial isoforms. These findings confirmed the temperature sensitivity of T. inermis and showed that the thermal stress took place before reaching the upper temperature limit estimated by respirometry at 12 °C. This study provides a baseline for further investigations into the thermal tolerances of arcto-boreal Thysanoessa spp. and comparisons with other krill species under different climatic regimes, especially Antarctica.
- Published
- 2016
17. First specimen record of Balaenoptera omurai off West Africa: interoceanic straggler or indication of a possible Atlantic population?
- Author
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Jean-Luc Jung, Wim Mullie, Koen van Waerebeek, Moulaye Mohamed Wagne, Abdellahi Samba Ould Bilal, Zein Ould Sidaty, Lola Toomey, and Frédéric Marret
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