370 results match your criteria atlantic halibut

Lagged recovery of fish spatial distributions following a cold-water perturbation.

Sci Rep 2021 May 4;11(1):9513. Epub 2021 May 4.

Centre for Fisheries Ecosystems Research, Fisheries and Marine Institute of Memorial, University of Newfoundland, P.O. Box 4920, St. John's, NL, A1C 5R3, Canada.

Anomalous local temperature and extreme events (e.g. heat-waves) can cause rapid change and gradual recovery of local environmental conditions. Read More

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Essential and non-essential heavy metal levels in key organs of winter flounder (Pseudopleuronectes americanus) and their potential impact on body condition.

Mar Pollut Bull 2021 Apr 27;168:112378. Epub 2021 Apr 27.

Department of Physiology, Medical Sciences Building, Rm 3259, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Surgery, University of Toronto; Oceanographic Environmental Research Society, 12 Burton Avenue, Barrie, Ontario L4N 2R2, Canada. Electronic address:

This study explored whether winter flounder, a benthic species, are potentially exposed to contaminants such as heavy metals released from the sediment of the Bay of Fundy/Gulf of Maine, both critical habitats identified to have increases in heavy metal levels. Experimentally in fish, exposure to certain heavy metals resulted in reduced weight for length and structural abnormalities, but it is unknown if this occurs in wild fish. Winter flounder (n = 72), harvested between 2015 and 2018 from the aforementioned western Atlantic region of Canada/USA, had detectable levels of most heavy metals, with some exhibiting levels of concern (arsenic, cadmium, lead, selenium, zinc) in muscle, liver, and kidney. Read More

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Changing climate associated with the range-wide decline of an estuarine finfish.

Glob Chang Biol 2021 Jun 19;27(11):2520-2536. Epub 2021 Mar 19.

Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA, USA.

Southern flounder (Paralichthys lethostigma) are a coastal flatfish species that supports recreational and commercial fisheries but are currently experiencing range-wide declines. To quantify the range-wide declines and investigate the role of climate in these declines, fishery-independent sampling data of age-0 flounder were obtained from 34 estuaries representing four states in the Gulf of Mexico (TX, LA, AL, and FL) and three states in the Southeastern United States Atlantic Ocean (FL, SC, and NC) spanning from 1976 to 2019. Generalized additive models (GAM) were used to estimate age-0 recruitment trends. Read More

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Rapid Analysis and Authentication of Meat Using the MasSpec Pen Technology.

J Agric Food Chem 2021 Mar 10;69(11):3527-3536. Epub 2021 Mar 10.

Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.

Food authenticity and safety are major public concerns due to the increasing number of food fraud cases. Meat fraud is an economically motivated practice of covertly replacing one type of meat with a cheaper alternative raising health, safety, and ethical concerns for consumers. In this study, we implement the MasSpec Pen technology for rapid and direct meat analysis and authentication. Read More

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Chromosome level reference of Atlantic halibut Hippoglossus hippoglossus provides insight into the evolution of sexual determination systems.

Mol Ecol Resour 2021 Mar 2. Epub 2021 Mar 2.

Biology Department, Dalhousie University, Halifax, NS, Canada.

Changes in the genetic mechanisms that control sexual determination have occurred independently across the tree of life, and with exceptional frequency in teleost fishes. To investigate the genomic changes underlying the evolution of sexual determination, we sequenced a chromosome-level genome, multitissue transcriptomes, and reduced representation population data for the Atlantic halibut (Hippoglossus hippoglossus), which has an XY/XX sex determination mechanism and has recently diverged (0.9-3. Read More

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Differential developmental toxicity of crude oil in early life stages of Atlantic halibut (Hippoglossus hippoglossus).

Sci Total Environ 2021 May 23;770:145349. Epub 2021 Jan 23.

Institute of Marine Research, Nordnes, 5817 Bergen, Norway.

To further understand the complexity of developmental toxicity of dispersed oil and importance of exposure timing on fish early life stages, Atlantic halibut (Hippoglossus hippoglossus) were exposed to environmentally relevant concentrations through two embryonic developmental windows: the first period occurred during the epiboly process (named as "early embryonic exposure") and the second period overlapped the ontogenesis and cardiogenesis processes (named as "late embryonic exposure"). Following 72 hour oil exposure, embryos were transferred to clean seawater and a toxicity screening was performed in the yolk-sac larvae until first-feeding stages (56 days). The current study demonstrated that the exposure timing is essential for the development of toxic effects of crude oil in Atlantic halibut. Read More

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Evaluating socio-economic and conservation impacts of management: A case study of time-area closures on Georges Bank.

PLoS One 2020 13;15(10):e0240322. Epub 2020 Oct 13.

eOceans, Dartmouth, Nova Scotia, Canada.

Globally, economies and marine ecosystems are increasingly dependent on sustainable fisheries management (SFM) to balance social, economic, and conservation needs. The overarching objectives of SFM are to maximize both conservation and socio-economic benefits, while minimizing short-term socio-economic costs. A number of tools have been developed to achieve SFM objectives, ranging from fishery specific to ecosystem-based strategies. Read More

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December 2020

Estimating the contribution of Greenland Halibut () stocks to nurseries by means of genotyping-by-sequencing: Sex and time matter.

Evol Appl 2020 Oct 20;13(9):2155-2167. Epub 2020 May 20.

Institut de biologie intégrative et des systèmes (IBIS) Université Laval Québec City QC Canada.

Identification of stocks and quantification of their relative contribution to recruitment are major objectives toward improving the management and conservation of marine exploited species. Next-generation sequencing allows for thousands of genomic markers to be analyzed, which provides the resolution needed to address these questions in marine species with weakly differentiated populations. Greenland Halibut () is one of the most important exploited demersal species throughout the North Atlantic, in particular in the Gulf of St. Read More

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October 2020

Legacy and Emerging Contaminants in Demersal Fish Species from Southern Norway and Implications for Food Safety.

Foods 2020 Aug 12;9(8). Epub 2020 Aug 12.

Department of Health, Animal Science and Food Safety, University of Milan, Via Celoria 10, I-20133 Milan, Italy.

The present study aimed at measuring the levels of legacy and emerging contaminants in fillet samples from four demersal fish caught in two fishing sites from Southern Norway, in order to assess possible implications for food safety. Levels of organochlorine compounds (OCs), organophosphate pesticides (OPs), polychlorinated biphenyls (PCBs), polybromodiphenyl ethers (PBDE), per- and polyfluoroalkyl substances (PFASs), and polycyclic aromatic hydrocarbons (PAHs) were measured in fillet from Atlantic cod (), European plaice (), lemon sole (), and European flounder () specimens. A negligible contamination by all the investigated chemicals was noted in both the fishing sites, as very low levels of OCs, PCBs, and PFASs were noted in a limited number of individuals for each species. Read More

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Ascaridoids in commercial fish: Occurrence, intensity and localization in whole fish and fillets destined for the Belgian market.

Int J Food Microbiol 2020 Aug 8;327:108657. Epub 2020 May 8.

Laboratory of Foodborne Parasitic Zoonoses, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke, Belgium. Electronic address:

Anisakidae and Raphidascaridae are marine nematodes present in a wide range of fish hosts, which may cause gastro-intestinal complaints and/or allergy in human, in addition to economic losses for the industry. Data regarding the presence of these parasites in fish for the Belgian market is currently missing; therefore, our aim was to investigate the presence and intensity of ascaridoids in a wide range of commercially fish species. A total of 415 fish samples, belonging to 36 different fish species, were collected from a Belgian whole-sale company. Read More

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Beta-adrenergic receptor stimulation influences the function of monocytes/macrophages in ayu (Plecoglossus altivelis).

Dev Comp Immunol 2020 02 1;103:103513. Epub 2019 Oct 1.

State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, 315211, China. Electronic address:

Adrenergic receptors (ARs) are members of the G-protein-coupled receptor superfamily that can be categorized into αARs and βARs. The specific function of ARs in teleost monocytes/macrophages (MO/MФ) remains unknown. We determined the cDNA sequence of ARs from ayu (Plecoglossus altivelis; PaαAR and PaβAR). Read More

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February 2020

Oxidative stress and biomarker responses in the Atlantic halibut after long term exposure to elevated CO and a range of temperatures.

Comp Biochem Physiol B Biochem Mol Biol 2019 Dec 28;238:110321. Epub 2019 Aug 28.

Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 463, SE-405 30 Gothenburg, Sweden. Electronic address:

CO emissions from human activities are increasing, resulting in greater rates of change in the oceans, exceeding any other event in geological and historical records over the past 300 million years. Oceans are warming and pH levels are decreasing. Marine organisms will need to respond to multiple stressors and the potential consequences of global change-related effects in fish needs to be investigated. Read More

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December 2019

Combined Effects of Acute Temperature Change and Elevated CO on the Metabolic Rates and Hypoxia Tolerances of Clearnose Skate (), Summer Flounder (), and Thorny Skate ().

Biology (Basel) 2019 Jul 26;8(3). Epub 2019 Jul 26.

Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA.

Understanding how rising temperatures, ocean acidification, and hypoxia affect the performance of coastal fishes is essential to predicting species-specific responses to climate change. Although a population's habitat influences physiological performance, little work has explicitly examined the multi-stressor responses of species from habitats differing in natural variability. Here, clearnose skate (Rostaraja eglanteria) and summer flounder () from mid-Atlantic estuaries, and thorny skate () from the Gulf of Maine, were acutely exposed to current and projected temperatures (20, 24, or 28 °C; 22 or 30 °C; and 9, 13, or 15 °C, respectively) and acidification conditions (pH 7. Read More

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Concentration of mercury, cadmium, and lead in breast milk from Norwegian mothers: Association with dietary habits, amalgam and other factors.

Sci Total Environ 2019 Aug 19;677:466-473. Epub 2019 Apr 19.

Department of Environmental Exposure and Epidemiology, Norwegian Institute of Public Health, P.O. Box 4404, N-0403 Oslo, Norway. Electronic address:

Mercury (Hg), cadmium (Cd), and lead (Pb) are of great concern for food safety and infants are especially sensitive to exposure to the maternal body burden. We quantified these elements in breast milk from Norwegian mothers and determined their association with dietary habits, maternal amalgam fillings, and smoking. Breast milk (n = 300) from the Norwegian Human Milk Study (HUMIS) was analyzed using triple quadrupole inductively coupled plasma mass spectrometry, after an acidic decomposition using microwave technique. Read More

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Induction of nuclear abnormalities in herring (Clupea harengus membras), flounder (Platichthys flesus), and Atlantic cod (Gadus morhua) collected from the southern part of the Gotland Basin-the Baltic Sea (2010-2017).

Environ Sci Pollut Res Int 2019 May 22;26(13):13366-13380. Epub 2019 Mar 22.

Institute of Ecology, Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania.

Eight nuclear abnormalities of genotoxicity and cytotoxicity were studied in peripheral blood erythrocytes of herring (Clupea harengus membras), flounder (Platichthys flesus), and Atlantic cod (Gadus morhua) sampled (2010-2017) from the Polish and the Lithuanian Exclusive Economic Zones (EEZ) in the Baltic Sea. At all study stations, total genotoxicity (∑Gentox) was found to be higher than total cytotoxicity (∑Cytox). A significant time-related decrease in genotoxicity was detected in the Lithuanian EEZ (2015-2017), while in the Polish EEZ (2014-2016), the opposite tendency was revealed. Read More

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Perfluoroalkyl substances (PFASs) in edible fish species from Charleston Harbor and tributaries, South Carolina, United States: Exposure and risk assessment.

Environ Res 2019 04 15;171:266-277. Epub 2019 Jan 15.

Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29412, USA.

Concentrations of 11 PFASs were determined in muscle and whole fish for six species collected from Charleston, South Carolina (SC) for the assessment of potential health risks to humans and wildlife. Across all species and capture locations, total PFAS levels in whole fish were significantly higher than fillets by a factor of two- to three-fold. Mean ∑PFAS concentrations varied from 12. Read More

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Effects of geography and species variation on selenium and mercury molar ratios in Northeast Atlantic marine fish communities.

Sci Total Environ 2019 Feb 1;652:1482-1496. Epub 2018 Nov 1.

Institute of Marine Research, Bergen, Norway; Faculty of Mathematics and Natural Sciences, University of Bergen, Bergen, Norway.

Methylmercury (MeHg) is a potent neurotoxin that bioaccumulates in seafood. Co-occurrence of selenium (Se) may affect the bioavailability and toxicity of MeHg in organisms. Here we report the concentrations of total mercury (Hg) and Se in 17 teleost fish species (n = 8459) sampled during 2006-2015 from the North East Atlantic Ocean (NEAO) and evaluate species variation and effects of geography. Read More

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February 2019

A novel ladder-like lectin relates to sites of mucosal immunity in Atlantic halibut (Hippoglossus hippoglossus L.).

Fish Shellfish Immunol 2019 Apr 22;87:9-12. Epub 2018 Dec 22.

Tissue Architecture and Regeneration Research Group, School of Life Sciences, University of Westminster, London, W1W 6UW, UK. Electronic address:

A novel 27 kDa ladder-lectin-like protein, showing a multimeric structure under non-reducing conditions, was isolated from halibut serum by binding to N-acetyl glucosamine. Mass-spectrometry analysis did not show significant homology with known proteins. Specific antibodies were produced and used in immunohistochemistry on tissue sections of early halibut ontogeny from 119 until 1050 °d post hatching. Read More

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Induction of sperm hypermotility through membrane progestin receptor alpha (mPRα): A teleost model of rapid, multifaceted, nongenomic progestin signaling.

Gen Comp Endocrinol 2019 08 7;279:60-66. Epub 2018 Dec 7.

The University of Texas at Austin Marine Science Institute, 750 Channel View Drive, Port Aransas, TX 78373, United States. Electronic address:

Rapid progestin effects on sperm physiology have been described in a variety of vertebrate species. Here, we briefly review the signaling pathways mediating rapid progestin induction of sperm hypermotility and increased fertility in two teleost species, Atlantic croaker and southern flounder. Acute in vitro treatment of teleost sperm with the progestin hormone, 20β-S, causes activation of progestin membrane receptor alpha (mPRα, or Paqr7) coupled to a stimulatory olfactory G protein (G), resulting in increased cAMP and calcium concentrations and hypermotility upon activation in a hyperosmotic medium. Read More

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Transient photoreception in the hindbrain is permissive to the life history transition of hatching in Atlantic halibut.

Dev Biol 2018 12 19;444(2):129-138. Epub 2018 Oct 19.

Department of Biological Sciences, University of Bergen, N- 5020 Bergen, Norway.

In nonmammalian vertebrates, photoreception takes place in the deep brain already early in development, but knowledge is lacking about the functions of these nonvisual photoreceptive systems. Prior to hatching, Atlantic halibut has a transient bilateral cluster of photoreceptive cells in the hindbrain. The cluster is imbedded in a neuronal network projecting to the narrow belt of hatching glands in the yolk sac. Read More

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December 2018

A new species of sinistral flatfish of the genus Chascanopsetta (Teleostei: Bothidae) from off Papua New Guinea, western Pacific Ocean.

Zootaxa 2018 Sep 13;4476(1):168-181. Epub 2018 Sep 13.

Institute of Oceanography, National Taiwan University, No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.

Left-eyed flounders of the genus Chascanopsetta Alcock 1894 (Bothidae) occur in the Indian, Pacific, and Atlantic oceans at depths ranging from 120 to 1500 meters. They possess some unique features in bothid fishes including a strongly compressed and elongated body and a tremendously large mouth. Currently, nine species of Chascanopsetta are recognized, and three of them (C. Read More

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September 2018

Factors influencing risk assessments of brominated flame-retardants; evidence based on seafood from the North East Atlantic Ocean.

Environ Int 2018 10 1;119:544-557. Epub 2018 Aug 1.

Institute of Marine Research (IMR), P.O. Box 7800, 5020 Bergen, Norway.

Brominated flame-retardants (BFRs) such as polybrominated diphenyl ethers (PBDE) and hexabromocyclododecane (HBCD) are considered hazardous to human health. Due to their persistence, they are still present in the environment and in biota and seafood is major contributor of BFRs to human exposure. Here, we used data from >9700 samples of wild and farmed fish, fish feed and fish feed ingredients collected from the North Atlantic between 2006 and 2016 aiming to investigate factors influencing the risk assessments of BFRs. Read More

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October 2018

Species-specific low plasma glucose in fish is associated with relatively high tissue glucose content and is inversely correlated with cardiac glycogen content.

J Comp Physiol B 2018 09 14;188(5):809-819. Epub 2018 Jul 14.

Department of Ocean Sciences, Ocean Sciences Centre, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada.

The relationship between plasma glucose concentration and intracellular glucose (liver, heart, brain, gill, gonad, intestine, kidney, spleen, white muscle) was determined in fish species with a range in plasma glucose (Atlantic cod, 5.06 mM; cunner, 3.8 mM; rainbow trout, 3. Read More

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September 2018

Reconciling differences in natural tags to infer demographic and genetic connectivity in marine fish populations.

Sci Rep 2018 07 9;8(1):10343. Epub 2018 Jul 9.

MARE - Marine and Environmental Sciences Centre, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal.

Processes regulating population connectivity are complex, ranging from extrinsic environmental factors to intrinsic individual based features, and are a major force shaping the persistence of fish species and population responses to harvesting and environmental change. Here we developed an integrated assessment of demographic and genetic connectivity of European flounder Platichthys flesus in the northeast Atlantic (from the Norwegian to the Portuguese coast) and Baltic Sea. Specifically, we used a Bayesian infinite mixture model to infer the most likely number of natal sources of individuals based on otolith near core chemical composition. Read More

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Iodine content of six fish species, Norwegian dairy products and hen's egg.

Food Nutr Res 2018 24;62. Epub 2018 May 24.

Institute of Marine Research (IMR), Bergen, Norway.

Iodine is a trace element required for the production of thyroid hormones, essential for metabolism, growth and brain development, particularly in the first trimester of pregnancy. Milk and lean fish are the main dietary sources of iodine in the Norwegian diet. Thus, the aim of the present study was to provide updated analysed values of iodine concentration in six fish species, 27 selected Norwegian iodine-rich dairy foods and Norwegian hen's eggs. Read More

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Revised classification of the righteye flounders (Teleostei: Pleuronectidae) based on multilocus phylogeny with complete taxon sampling.

Mol Phylogenet Evol 2018 08 10;125:147-162. Epub 2018 Mar 10.

National Systematics Laboratory, NOAA's National Marine Fisheries Service, Office of Science and Technology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013, USA.

Members of the family Pleuronectidae are common representatives of the marine benthic fauna inhabiting northern regions of the Atlantic and Pacific oceans. The most recent comprehensive classification of the family, based entirely on morphological synapomorphies, recognized five subfamilies, 23 genera, and 61 extant species. However, several subsequent molecular studies have shown that many synapomorphic characters discovered in the morphological study might represent homoplasies, thereby questioning the reliance on these characters with the warning that they may provide misleading information for testing other morphology-based evolutionary hypotheses. Read More

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Abnormalities in flatfishes of the south-west Atlantic Ocean.

J Fish Biol 2018 Apr 2;92(4):1225-1234. Epub 2018 Mar 2.

Laboratorio de Biotaxonomía Morfológica y Molecular de Peces (BIMOPE), Instituto de Investigaciones Marinas y Costeras (IIMyC)-CONICET, Universidad Nacional de Mar del Plata (UNMdP), Funes 3350, B7602AYL Mar del Plata, Argentina.

Five adult paralichthyid specimens with various kinds of abnormalities are reported from the south-west Atlantic Ocean. These abnormal flatfish specimens represent the first records of wholly ambicoloured Paralichthys orbignyanus specimens having a deep notch between the eye and dorsal fin and a partially albinistic specimen having skeletal deformities and only the second record of an almost totally ambicoloured specimen. We also report the first observation of reversal in Paralichthys patagonicus and an almost totally ambicoloured, reversed Xystreurys rasile. Read More

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Genetic mapping and comparative genomics to inform restoration enhancement and culture of southern flounder, Paralichthys lethostigma.

BMC Genomics 2018 02 23;19(1):163. Epub 2018 Feb 23.

Department of Life Sciences, Marine Genomics Laboratory, Texas A&M University Corpus Christi, 6300 Ocean Drive, Unit 5869, Corpus Christi, TX, 78412, USA.

Background: Southern flounder, Paralichthys lethostigma, historically support a substantial fishery along the Atlantic and Gulf coasts of the southern United States. Low year-class strengths over the past few years in the western Gulf of Mexico have raised concern that spawning stocks may be overfished. Current management of the resource includes releasing hatchery-raised juveniles to restock bays and estuaries; additionally, there is a growing interest in the potential for commercial aquaculture of the species. Read More

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February 2018

Structural and functional maturation of skin during metamorphosis in the Atlantic halibut (Hippoglossus hippoglossus).

Cell Tissue Res 2018 06 20;372(3):469-492. Epub 2018 Feb 20.

Comparative Endocrinology and Integrative Biology Group (CEIB), CCMAR, CIMAR Laboratório Associado, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal.

To establish if the developmental changes in the primary barrier and osmoregulatory capacity of Atlantic halibut skin are modified during metamorphosis, histological, histochemical, gene expression and electrophysiological measurements were made. The morphology of the ocular and abocular skin started to diverge during the metamorphic climax and ocular skin appeared thicker and more stratified. Neutral mucins were the main glycoproteins produced by the goblet cells in skin during metamorphosis. Read More

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Population status of Greenland halibut Reinhardtius hippoglossoides (Walbaum, 1793) of the Laptev Sea.

Dokl Biochem Biophys 2017 Nov 3;477(1):349-353. Epub 2018 Jan 3.

Russian Federal Research Institute of Fisheries and Oceanography, Moscow, 107140, Russia.

This is the first study to perform a comparative genetic analysis of Greenland halibut in the samples from the Atlantic (waters of west and east of Greenland), Arctic (Laptev Sea), and Pacific (the western part of the Bering Sea) ocean basins using seven microsatellite loci. The obtained data clearly demonstrate that the Greenland halibut population in the Laptev Sea belongs to the groups of the Atlantic Ocean basin. Apparently, the Greenland halibut of the Laptev Sea is represented by a dependent population, which is replenished due to the drift of immatures from the spawning grounds in the Barents Sea with the transformed Atlantic water flow along the continental slope. Read More

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November 2017