236 results match your criteria hippoglossus

Morphological and molecular description of a distinct population of Echinorhynchus gadi Zoega in Müller, 1776 (Paleacanthocephala: Echinorhynchidae) from the pacific halibut Hippoglossus stenolepis Schmidt in Alaska.

Acta Parasitol 2021 Mar 9. Epub 2021 Mar 9.

I. I. Schmalhausen Institute of Zoology, Kyiv, Ukraine.

Purpose: Echinorhynchus gadi is one of the most widely distributed and commonly described acanthocephalans in marine fishes throughout the world. We provide a detailed morphometric and molecular description of a distinct Alaska population collected from the Pacific halibut Hippoglossus stenolepis Schmidt (Pleuronectidae) compared to those from other hosts and regions, illustrating new features never previously reported.

Methods: We described new specimens by microscopical studies, augmented by SEM, Energy Dispersive x-ray and molecular analyses, and histopathology. 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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Controlled experiments to explore the use of a multi-tissue approach to characterizing stress in wild-caught Pacific halibut ().

Conserv Physiol 2021 5;9(1):coab001. Epub 2021 Feb 5.

Fisheries, Aquatic Science, and Technology Laboratory, Alaska Pacific University, 4101 University Dr., Anchorage, AK 99508, USA.

The integration of multiple tissues in physiological and ecological analyses can enhance methodological approaches, increase applications for data and extend interpretation of results. Previous investigations of the stress response in fish have focused primarily on cortisol levels in a single matrix-blood plasma-which confines interpretations of cortisol levels to a short temporal frame. Epidermal mucus has been proposed as an alternative or complement to plasma that may provide a view to cortisol levels over a different temporal window allowing comparative assessment. Read More

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February 2021

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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The Proteome and Citrullinome of Extracellular Vesicles-Novel Insights into Roles of the Serum Secretome in Immune, Gene Regulatory and Metabolic Pathways.

Int J Mol Sci 2021 Jan 16;22(2). Epub 2021 Jan 16.

Tissue Architecture and Regeneration Research Group, Department of Biomedical Sciences, University of Westminster, London W1W 6UW, UK.

Extracellular vesicles (EVs) are lipid bilayer vesicles which are released from cells and play multifaceted roles in cellular communication in health and disease. EVs can be isolated from various body fluids, including serum and plasma, and are usable biomarkers as they can inform health status. Studies on EVs are an emerging research field in teleost fish, with accumulating evidence for important functions in immunity and homeostasis, but remain to be characterised in most fish species, including halibut. Read More

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January 2021

Complete mitochondrial genomes of two species: and (Teleostei: Pleuronectiformes: Pleuronectidae).

Mitochondrial DNA B Resour 2019 Nov 12;4(2):3931-3932. Epub 2019 Nov 12.

Institute of Marine Living Modified Organisms (iMLMO), Pukyong National University, Busan, Republic of Korea.

Complete mitochondrial genomes of two species, and (Teleostei: Pleuronectiformes: Pleuronectidae) were analysed using the primer walking method. Their mitogenomes were 17,632 and 17,273 bp in total length, respectively and comprised 13 protein-coding genes, 2 ribosomal RNA genes, and 22 transfer RNA genes. Their gene contents and orders were similar to those of typical vertebrates. Read More

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November 2019

A comprehensive description of oocyte developmental stages in Pacific halibut, Hippoglossus stenolepis.

J Fish Biol 2020 Dec 5;97(6):1880-1885. Epub 2020 Oct 5.

International Pacific Halibut Commission, Seattle, Washington, USA.

Accurate characterization of oocyte development is essential to understanding foundational aspects of reproductive biology and successful management of Pacific halibut (Hippoglossus stenolepis). Here this study provides complete histological descriptions for eight oocyte developmental stages in addition to postovulatory follicles and demonstrates the potential for oocyte size frequency distribution to act as a proxy for ovarian developmental stage and future maturity assessments. Importantly, it provides the first histological evidence that Pacific halibut have a group-synchronous ovarian developmental pattern with determinate fecundity and support for their batch-spawning strategy. Read More

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December 2020

Use of the traditional halibut hook of the Makah Tribe, the čibu.d, reduces bycatch in recreational halibut fisheries.

PeerJ 2020 12;8:e9288. Epub 2020 Jun 12.

Scordino Consulting, Edmonds, WA, United States of America.

A previous study found that use of the traditional halibut hook (čibu.d) of the Makah Tribe in present day recreational Pacific halibut () fisheries significantly reduced bycatch compared to paired 8/0 circle hooks. The study also found that the čibu. Read More

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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

Molecular cloning, characterization, and mRNA expression of gonadotropins during larval development in turbot (Scophthalmus maximus).

Fish Physiol Biochem 2019 Oct 16;45(5):1697-1707. Epub 2019 May 16.

Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, No. 106 Nanjing Road, Qingdao, 266071, People's Republic of China.

Gonadotropins (GtHs) play a pivotal role in regulating the reproductive axis and puberty. In this study, full-length sequences coding for common glycoprotein α subunit (CGα) and luteinizing hormone β (LHβ) were isolated from female turbot (Scophthalmus maximus) pituitary by homology cloning and a strategy based on rapid amplification of cDNA end-polymerase chain reaction. Results showed that the two cDNAs consisted of 669 and 660 nucleotides encoding 129 and 139 amino acids, respectively. Read More

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October 2019

Exploring sample cross-contamination in fish epidermal mucus.

J Fish Biol 2019 Aug 30;95(2):647-650. Epub 2019 Apr 30.

Fisheries, Aquatic Science and Technology Laboratory, Alaska Pacific University, Anchorage, Alaska, USA.

Cross-contamination of epidermal mucus was assessed at three sampling locations on the bodies of Pacific halibut Hippoglossus stenolepis by inducing contact between fish coated with labelled synthetic mucus and non-treated fish. Results indicate a positive relationship between sampling site exposure and sample contamination and that mucous sample cross-contamination can be mitigated by sampling in a location protected from external contact. Read More

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Characterizing preferences of fishermen to inform decision-making: A case study of the Pacific halibut (Hippoglossus stenolepis) fishery off Alaska.

PLoS One 2019 1;14(3):e0212537. Epub 2019 Mar 1.

Juneau Center for Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, Alaska, United States of America.

In fisheries management, ex-ante analysis of fishermen's preferences can provide reliable insights into specific characteristics of regulatory alternatives that are desirable, objectionable, or important, in the judgement of fishermen. This knowledge could facilitate consideration by fishery managers of additional regulatory alternatives with high likelihoods of meeting program objectives, minimal disruption to fishing operations and lifestyles, and high levels of acceptance and compliance from the fishing fleet. In this case study, we interviewed Pacific halibut fishermen (n = 76) in four communities across Southeast Alaska, to document their preferences about different types of data collection methods on their vessels. Read More

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November 2019

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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Assessing the potential for competition between Pacific Halibut (Hippoglossus stenolepis) and Arrowtooth Flounder (Atheresthes stomias) in the Gulf of Alaska.

PLoS One 2018 18;13(12):e0209402. Epub 2018 Dec 18.

College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, United States of America.

Pacific Halibut (Hippoglossus stenolepis) support culturally and economically important fisheries in the Gulf of Alaska, though recent decreases in mean size-at-age have substantially reduced fishery yields, generating concerns among stakeholders and resource managers. Among the prevailing hypotheses for reduced size-at-age is intensified competition with Arrowtooth Flounder (Atheresthes stomias), a groundfish predator that exhibited nearly five-fold increases in biomass between the 1960s and mid-2010s. To assess the potential for competition between Pacific Halibut and Arrowtooth Flounder, we evaluated their degree of spatiotemporal and dietary overlap in the Gulf of Alaska using bottom trawl survey and food habits data provided by the Alaska Fisheries Science Center (NOAA; 1990 to 2017). Read More

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Peptidylarginine deiminase and deiminated proteins are detected throughout early halibut ontogeny - Complement components C3 and C4 are post-translationally deiminated in halibut (Hippoglossus hippoglossus L.).

Dev Comp Immunol 2019 03 3;92:1-19. Epub 2018 Nov 3.

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

Post-translational protein deimination is mediated by peptidylarginine deiminases (PADs), which are calcium dependent enzymes conserved throughout phylogeny with physiological and pathophysiological roles. Protein deimination occurs via the conversion of protein arginine into citrulline, leading to structural and functional changes in target proteins. In a continuous series of early halibut development from 37 to 1050° d, PAD, total deiminated proteins and deiminated histone H3 showed variation in temporal and spatial detection in various organs including yolksac, muscle, skin, liver, brain, eye, spinal cord, chondrocytes, heart, intestines, kidney and pancreas throughout early ontogeny. Read More

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Ichthyophonus in sport-caught groundfishes from southcentral Alaska.

Dis Aquat Organ 2018 05;128(2):169-173

Alaska Pacific University, Fisheries Aquatic Science and Technology (FAST) Laboratory, 4101 University Drive, Anchorage, AK 99508, USA.

This report of Ichthyophonus in common sport-caught fishes throughout the marine waters of southcentral Alaska represents the first documentation of natural Ichthyophonus infections in lingcod Ophiodon elongates and yelloweye rockfish Sebastes ruberrimus. In addition, the known geographic range of Ichthyophonus in black rockfish S. melanops has been expanded northward to include southcentral Alaska. Read More

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High-Prevalence and Low-Intensity Ichthyophonus Infections in Pacific Halibut.

J Aquat Anim Health 2018 03;30(1):13-19

International Pacific Halibut Commission, 2320 West Commodore Way, Suite 300, Seattle, Washington, 98199, USA.

Ichthyophonus occurred at high prevalence but low intensity in Pacific Halibut Hippoglossus stenolepis throughout the West Coast of North America, ranging from coastal Oregon to the Bering Sea. Infection prevalence in adults was variable on spatial and temporal scales, with the lowest prevalence typically occurring on the edges of the geographic range and highest prevalence consistently occurring inside Prince William Sound, Alaska (58-77%). Additionally, intra-annual differences occurred at Albatross-Portlock, Alaska (71% versus 32% within 2012), and interannual differences occurred along coastal Oregon (50% in 2012 versus 12% in 2015). Read More

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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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Toxic and essential elements in seafood from Mausund, Norway.

Environ Sci Pollut Res Int 2018 Mar 26;25(8):7409-7417. Epub 2017 Dec 26.

Department of Biology, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway.

In annual surveys conducted during the period 2012-2015, concentrations of the toxic or essential elements B, Se, Cd, Sn, Cs, Hg, Pb, Al, Cr, Mn, Fe, Ni, Cu, Zn, and As were analyzed in brown meat of edible crab (Cancer pagurus), and filets of cod (Gadus morhua) and halibut (Hippoglossus hippoglossus) in one of the most important commercial crab fishing areas in Norway, at Mausund in Frøya municipality in Sør-Trøndelag, Norway. Concentrations of the elements were analyzed in sediments in 2015. Several salmon farms are located in this area. Read More

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Connectivity, persistence, and loss of high abundance areas of a recovering marine fish population in the Northwest Atlantic Ocean.

Ecol Evol 2017 11 18;7(22):9739-9749. Epub 2017 Oct 18.

Bedford Institute of Oceanography Fisheries and Oceans Canada Dartmouth NS Canada.

In the early 1990s, the Northwest Atlantic Ocean underwent a fisheries-driven ecosystem shift. Today, the iconic cod () remains at low levels, while Atlantic halibut () has been increasing since the mid-2000s, concomitant with increasing interest from the fishing industry. Currently, our knowledge about halibut ecology is limited, and the lack of recovery in other collapsed groundfish populations has highlighted the danger of overfishing local concentrations. Read More

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November 2017

Identification of Genomic Regions Associated With Sex in Pacific Halibut.

J Hered 2018 03;109(3):326-332

University of Washington, School of Aquatic and Fishery Sciences, Seattle, Washington.

Understanding and identifying the genetic mechanisms responsible for sex-determination are important for species management, particularly in exploited fishes where sex biased harvest could have implications on population dynamics and long-term persistence. The Pacific halibut (Hippoglossus stenolepis) supports important fisheries in the North Pacific Ocean. The proportion of each sex in the annual harvest is currently estimated using growth curves, but genetic techniques may provide a more accurate method. Read More

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High prevalence and low intensity Ichthyophonus infections in Pacific Halibut (Hippoglossus stenolepis).

J Aquat Anim Health 2017 Oct 13. Epub 2017 Oct 13.

a Western Fisheries Research Center , U.S. Geological Survey , Marrowstone Marine Field Station, 616 Marrowstone Point Road, Nordland , Washington 98358 , USA.

Ichthyophonus occurred at high prevalence but low intensity in Pacific Halibut (Hippoglossus stenolepis) throughout the west coast of North America, ranging from coastal Oregon to the Bering Sea. Infection prevalence in adults was variable on spatial and temporal scales, with the lowest prevalence typically occurring on the edges of the geographic range and highest prevalence consistently occurring inside Prince William Sound, AK (58-77%). Additionally, intra-annual differences occurred at Albatross - Portlock, AK (71% versus 32% within 2012) and inter-annual differences occurred along coastal Oregon (50% versus 12% from 2012 to 2015). Read More

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October 2017

High nervous necrosis virus (NNV) diversity in wild wrasse (Labridae) in Norway and Sweden.

Dis Aquat Organ 2017 09;126(1):43-50

Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway.

Wild goldsinny wrasse Ctenolabrus rupestris, corkwing wrasse Symphodus melops and ballan wrasse Labrus bergylta were collected at 8 sampling sites in Sweden and Norway during summer 2014. Brain tissue from 466 wrasses were analyzed for nervous necrosis virus (NNV) infections by real-time RT-PCR, and positive samples were subjected to sequencing and phylogenetic analysis of partial segments of the RNA2 and RNA1 genes. This study shows that NNV is present in wild ballan, corkwing and goldsinny wrasse along the coastline of Sweden and Norway. Read More

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September 2017

Comparative pathogenicity of Vibrio spp., Photobacterium damselae ssp. damselae and five isolates of Aeromonas salmonicida ssp. achromogenes in juvenile Atlantic halibut (Hippoglossus hippoglossus).

J Fish Dis 2018 Jan 21;41(1):79-86. Epub 2017 Jul 21.

School of Food and Agriculture, Aquaculture Research Institute, University of Maine, Orono, ME, USA.

Juvenile Atlantic halibut (~100 mg, Hippoglossus hippoglossus) were exposed to Vibrio proteolyticus, a Vibrio spp. isolate, Photobacterium damselae ssp. damselae and five different isolates of Aeromonas salmonicida ssp. Read More

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January 2018

H2A and Ca-L-hipposin gene: Characteristic analysis and expression responses to Aeromonas hydrophila infection in Carassius aurutus.

Fish Shellfish Immunol 2017 Apr 20;63:344-352. Epub 2017 Feb 20.

College of Fisheries, Henan Normal University, Xinxiang 453007, China.

Antimicrobial peptide is an important component of the host innate immune system and thus serves a crucial function in host defense against microbial invasion. In this study, H2A and derived antimicrobial peptide Ca-L-hipposin were cloned and characterized in Carassius aurutus. The gene H2A full-length cDNA is 908 bp and includes a 5'-terminal untranslated region (UTR) of 55 bp and a 3'-terminal UTR of 466 bp with a canonical polyadenylation signal sequence AATAA, as well as an open reading frame (ORF) of 387 bp encoding a polypeptide of 128 amino acids, with a molecular weight of 13. Read More

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Centromeric Satellite DNA in Flatfish (Order Pleuronectiformes) and Its Relation to Speciation Processes.

J Hered 2017 03;108(2):217-222

From the Departamento de Genética, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18071 Granada, Spain.

Two new centromeric satellite DNAs in flatfish (Order Pleuronectiformes) have been characterized. The SacI-family from Hippoglossus hippoglossus, restricted to this species, had a monomeric size of 334 base pair (bp) and was located in most of the centromeres of its karyotype. The PvuII-family, with a monomeric size of 177 bp, was initially isolated from the genome of Solea senegalensis, and fluorescent in situ hybridization (FISH) localized the repeat to centromeres of most of the chromosomes. Read More

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Comparative assessment of Vibrio virulence in marine fish larvae.

J Fish Dis 2017 Oct 4;40(10):1373-1385. Epub 2017 Feb 4.

Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.

Vibrionaceae infections are a major obstacle for marine larviculture; however, little is known about virulence differences of Vibrio strains. The virulence of Vibrio strains, mostly isolated from vibriosis outbreaks in farmed fish, was tested in larval challenge trials with cod (Gadus morhua), turbot (Scophthalmus maximus) and halibut (Hippoglossus hippoglossus) using a multiwell dish assays with single-egg/larvae cultures. The strains differed significantly in virulence as some caused a high mortality of larva reaching 100% mortality after a few days, while others had no or only marginal effects on survival. Read More

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October 2017

Integrating genomic resources of flatfish (Pleuronectiformes) to boost aquaculture production.

Comp Biochem Physiol Part D Genomics Proteomics 2017 Mar 24;21:41-55. Epub 2016 Dec 24.

Department of Zoology, Genetics and Physical Anthropology, Faculty of Veterinary, Universidade de Santiago de Compostela, 27002 Lugo, Spain. Electronic address:

Flatfish have a high market acceptance thus representing a profitable aquaculture production. The main farmed species is the turbot (Scophthalmus maximus) followed by Japanese flounder (Paralichthys olivaceous) and tongue sole (Cynoglossus semilaevis), but other species like Atlantic halibut (Hippoglossus hippoglossus), Senegalese sole (Solea senegalensis) and common sole (Solea solea) also register an important production and are very promising for farming. Important genomic resources are available for most of these species including whole genome sequencing projects, genetic maps and transcriptomes. Read More

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Duplication of Dio3 genes in teleost fish and their divergent expression in skin during flatfish metamorphosis.

Gen Comp Endocrinol 2017 05 3;246:279-293. Epub 2017 Jan 3.

Comparative Endocrinology and Integrative Biology, Centre of Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal. Electronic address:

Deiodinase 3 (Dio3) plays an essential role during early development in vertebrates by controlling tissue thyroid hormone (TH) availability. The Atlantic halibut (Hippoglossus hippoglossus) possesses duplicate dio3 genes (dio3a and dio3b). Expression analysis indicates that dio3b levels change in abocular skin during metamorphosis and this suggests that this enzyme is associated with the divergent development of larval skin to the juvenile phenotype. Read More

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