12,555 results match your criteria teleost fish

Ontogeny of Inner Ear Saccular Development in the Plainfin Midshipman (Porichthys notatus).

Brain Behav Evol 2021 Jun 23:1-11. Epub 2021 Jun 23.

Department of Psychology, University of Washington, Seattle, Washington, USA.

The auditory system of the plainfin midshipman fish (Porichthys notatus) is an important sensory system used to detect and encode biologically relevant acoustic stimuli important for survival and reproduction including social acoustic signals used for intraspecific communication. Previous work showed that hair cell (HC) density in the midshipman saccule increased seasonally with reproductive state and was concurrent with enhanced auditory saccular sensitivity in both females and type I males. Although reproductive state-dependent changes in HC density have been well characterized in the adult midshipman saccule, less is known about how the saccule changes during ontogeny. Read More

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Nonlethal age estimation of three threatened fish species using DNA methylation: Australian lungfish, Murray cod and Mary River cod.

Mol Ecol Resour 2021 Jun 23. Epub 2021 Jun 23.

School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia.

Age-based demography is fundamental to management of wild fish populations. Age estimates for individuals can determine rates of change in key life-history parameters such as length, maturity, mortality and fecundity. These age-based characteristics are critical for population viability analysis in endangered species and for developing sustainable harvest strategies. Read More

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The digestive tract as an essential organ for water acquisition in marine teleosts: lessons from euryhaline eels.

Yoshio Takei

Zoological Lett 2021 Jun 21;7(1):10. Epub 2021 Jun 21.

Laboratory of Physiology, Department of Marine Bioscience, Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan.

Adaptation to a hypertonic marine environment is one of the major topics in animal physiology research. Marine teleosts lose water osmotically from the gills and compensate for this loss by drinking surrounding seawater and absorbing water from the intestine. This situation is in contrast to that in mammals, which experience a net osmotic loss of water after drinking seawater. Read More

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ZAP70 activation is an early event of T cell immunity that involved in the anti-bacterial adaptive immune response of Nile tilapia.

Dev Comp Immunol 2021 Jun 18:104177. Epub 2021 Jun 18.

State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. Electronic address:

ZAP70 is essential for initiating the early events of T-cell antigen receptor (TCR) signaling cascade to ensure proper T cell activation and function. However, whether this molecule takes part in the T cell immune response of early vertebrates remains unclear. In the present study, using a teleost model Nile tilapia (Oreochromis niloticus), we investigated the potential involvement of ZAP70 in the T cell activation and adaptive immunity of fish species. Read More

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Echinocephalus inserratus sp. n. (Nematoda: Gnathostomatidae) from the stingray Pastinachus ater (Dasyatidae) and new records of congeneric and some other nematode larvae from teleost fishes off New Caledonia.

Folia Parasitol (Praha) 2021 May 25;68. Epub 2021 May 25.

Institut Systematique Evolution Biodiversite (ISYEB), Museum National d'Histoire Naturelle, CNRS, Sorbonne Universite, EPHE, Universite des Antilles, Paris, France.

Based on light and electron microscopical studies, a new nematode parasite, Echinocephalus inserratus sp. n. (Spirurida: Gnathostomatidae), is described from the spiral valve of the broad cowtail stingray Pastinachus ater (Macleay) (Dasyatidae, Myliobatiformes) from off New Caledonia. Read More

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From Endoderm to Progenitors: An Update on the Early Steps of Thyroid Morphogenesis in the Zebrafish.

Front Endocrinol (Lausanne) 2021 4;12:664557. Epub 2021 Jun 4.

Dipartimento di Malattie Endocrine e del Metabolismo, IRCCS Istituto Auxologico Italiano IRCCS, Milan, Italy.

The mechanisms underlying thyroid gland development have a central interest in biology and this review is aimed to provide an update on the recent advancements on the early steps of thyroid differentiation that were obtained in the zebrafish, because this teleost fish revealed to be a suitable organism to study the early developmental stages. Physiologically, the thyroid precursors fate is delineated by the appearance among the endoderm cells of the foregut of a restricted cell population expressing specific transcription factors, including , , and . The committed thyroid primordium first appears as a thickening of the pharyngeal floor of the anterior endoderm, that subsequently detaches from the floor and migrates to its final location where it gives rise to the thyroid hormone-producing follicles. Read More

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Proteomics support the threespine stickleback egg coat as a protective oocyte envelope.

Mol Reprod Dev 2021 Jun 20. Epub 2021 Jun 20.

Department of Genome Sciences, University of Washington, Seattle, Washington, USA.

Ancestrally marine threespine stickleback fish (Gasterosteus aculeatus) have undergone an adaptive radiation into freshwater environments throughout the Northern Hemisphere, creating an excellent model system for studying molecular adaptation and speciation. Ecological and behavioral factors have been suggested to underlie stickleback reproductive isolation and incipient speciation, but reproductive proteins mediating gamete recognition during fertilization have so far remained unexplored. To begin to investigate the contribution of reproductive proteins to stickleback reproductive isolation, we have characterized the stickleback egg coat proteome. Read More

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RIPK3 collaborates with RIPK1 to inhibit MAVS-mediated signaling during black carp antiviral innate immunity.

Fish Shellfish Immunol 2021 Jun 17;115:142-149. Epub 2021 Jun 17.

State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China. Electronic address:

Both the activation and attenuation of MAVS/IFN signaling are critical for host defensing against viral infection and thus lead to an elaborate regulation of MAVS-mediated signaling. However, the regulatory mechanisms concerning MAVS/IFN signaling in teleost fish are not well understood. RIPK3 has been identified as a key regulator of necroptosis, apoptosis, and inflammatory signaling in human and mammals. Read More

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Molecular characterization of transient receptor potential vanilloid 4 (TRPV4) gene transcript variant mRNA of chum salmon Oncorhynchus keta in response to salinity or temperature changes.

Gene 2021 Jun 15:145779. Epub 2021 Jun 15.

Department of Marine Biotechnology, Gangneung-Wonju National University, Gangneung 25457, South Korea; The East Coast Research Institute of Life Science, Gangneung-Wonju National University, Gangneung 25457, South Korea. Electronic address:

Transient receptor potential vanilloid 4 (TRPV4) is an osmosensory cation channel that respond to an incease in cell volum and participates in various physiological functions. Among organisms in aquatic environments, euryhaline teleost is are suitable experimental models to study ion channel proteins related to physiological functions involving osmosensing. Among the studies of various regulatory molecules that mediate osmotic regulation in fish, however, information is lacking, particularly on the TRP family. Read More

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Individual B cells transcribe multiple rearranged immunoglobulin light chains in teleost fish.

iScience 2021 Jun 24;24(6):102615. Epub 2021 May 24.

Animal Health Research Center (CISA-INIA), Valdeolmos, Madrid 28130, Spain.

B cells express a unique antibody protein which comprises two pairs of immunoglobulin (Ig) heavy (H) and light (L) chains. In addition to an invariable constant (C) region, IgH and IgL chains encompass a variable (V) region mediating antigen binding. This unique region stems from Ig V(D)J gene recombination, which generates diversity by assembling these gene segments into VDJ and VJ genes. Read More

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Teleost-Specific MxG, a Traitor in the Mx Family, Negatively Regulates Antiviral Responses by Targeting IPS-1 for Proteasomal Degradation and STING for Lysosomal Degradation.

J Immunol 2021 Jun 16. Epub 2021 Jun 16.

Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China;

IFN-β promoter stimulator-1 (IPS-1)- and stimulator of IFN genes (STING)-mediated type I IFNs play a critical role in antiviral responses. Myxovirus resistance (Mx) proteins are pivotal components of the antiviral effectors induced by IFNs in many species. An unprecedented expansion of Mx genes has occurred in fish. Read More

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Comparative analysis of the miRNA-mRNA regulation networks in turbot (Scophthalmus maximus L.) following Vibrio anguillarum infection.

Dev Comp Immunol 2021 Jun 12:104164. Epub 2021 Jun 12.

School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China. Electronic address:

MicroRNAs could not only regulate posttranscriptional silencing of target genes in eukaryotic organisms, but also have positive effect on their target genes as well. These microRNAs have been reported to be involved in intestine mucosal immune responses to pathogen infection in teleost. Therefore, we constructed the immune-related miRNA-mRNA networks in turbot intestine following V. Read More

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F-type lectin from serum of the Antarctic teleost fish Trematomus bernacchii (Boulenger, 1902): Purification, structural characterization, and bacterial agglutinating activity.

Comp Biochem Physiol B Biochem Mol Biol 2021 Jun 11:110633. Epub 2021 Jun 11.

Marine Immunobiology Laboratory, Department of Earth and Marine Sciences, University of Palermo, Palermo, Italy. Electronic address:

The increasing availability of sequenced genomes has enabled a deeper understanding of the complexity of fish lectin repertoires involved in early development and immune recognition. The teleost fucose-type lectin (FTL) family includes proteins that preferentially bind fucose and display tandemly arrayed carbohydrate-recognition domains (CRDs) or are found in mosaic combinations with other domains. They function as opsonins, promoting phagocytosis and the clearance of microbial pathogens. Read More

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Molecular evolution of kalliklectin in teleost and identification of the novel type with eight apple domains in channel catfish, Ictalurus punctatus.

Mol Biol Rep 2021 Jun 14. Epub 2021 Jun 14.

School of Marine Biosciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan.

Kalliklectin is a unique fish-specific lectin that demonstrates sequence similarity to mammalian plasma kallikrein and coagulation factor XI, which are not lectins but proteases. Reported fish kalliklectins and these mammalian proteases comprise four characteristic "apple domains" (APDs). Bioinformatics analysis revealed that Siluriformes species possess anomalous kalliklectins comprising 6 to 16 APDs. Read More

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Characterization of a Nanovaccine Platform Based on an α1,2-Mannobiose Derivative Shows Species-non-specific Targeting to Human, Bovine, Mouse, and Teleost Fish Dendritic Cells.

Mol Pharm 2021 Jun 9. Epub 2021 Jun 9.

Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.

Dendritic cells serve as the main immune cells that trigger the immune response. We developed a simple and cost-effective nanovaccine platform based on the α1',2-mannobiose derivative for dendritic cell targeting. In previous work, we have formulated the α1,2-mannobiose-based nanovaccine platform with plasmid DNA and tested it in cattle against BoHV-1 infection. Read More

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Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822).

Braz J Biol 2021 4;82:e237040. Epub 2021 Jun 4.

King Saud University, College of Science, Department of Zoology, Riyadh, Saudi Arabia.

This investigation presents the food and feeding activity of and endangered riverine catfish Rita rita, during February 2017-January 2018. A total of 225 fish individuals was analyzed for stomach contents by characterizing the dominant food items and morphometric features. The results divulged ten major food items consumed, preferably fish scales and eggs, teleost fishes, copepods, cladocerans, rotifers, and mollusks. Read More

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Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae).

Braz J Biol 2021 2;82:e240894. Epub 2021 Jun 2.

Pontifícia Universidade Católica de Minas Gerais - PUC Minas, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia de Vertebrados, Belo Horizonte, MG, Brasil.

The release of water from the reservoir hypolimnion, lower concentration of oxygen and the anthropogenic regulation of the river flow, could affect the reproduction of fish, especially migratory species. However, little is known about the effects of these changes in water on non-migratory species. In this sense, the reproduction of Acestrohynchus lacustris was evaluated in two sections of São Francisco River, Minas Gerais, Brazil. Read More

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Characterization of the G protein-coupled receptor family SREB across fish evolution.

Sci Rep 2021 Jun 8;11(1):12066. Epub 2021 Jun 8.

Tropical Aquaculture Laboratory, Program in Fisheries and Aquatic Sciences, School of Forest Resources and Conservation, Institute of Food and Agricultural Sciences, University of Florida, Ruskin, FL, USA.

The SREB (Super-conserved Receptors Expressed in Brain) family of G protein-coupled receptors is highly conserved across vertebrates and consists of three members: SREB1 (orphan receptor GPR27), SREB2 (GPR85), and SREB3 (GPR173). Ligands for these receptors are largely unknown or only recently identified, and functions for all three are still beginning to be understood, including roles in glucose homeostasis, neurogenesis, and hypothalamic control of reproduction. In addition to the brain, all three are expressed in gonads, but relatively few studies have focused on this, especially in non-mammalian models or in an integrated approach across the entire receptor family. Read More

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A show of Hands: Novel and conserved expression patterns of teleost hand paralogs during craniofacial, heart, fin, peripheral nervous system and gut development.

Dev Dyn 2021 Jun 6. Epub 2021 Jun 6.

Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina, USA.

Background: Hand genes are required for the development of the vertebrate jaw, heart, peripheral nervous system, limb, gut, placenta, and decidua. Two Hand paralogues, Hand1 and Hand2, are present in most vertebrates, where they mediate different functions yet overlap in expression. In ray-finned fishes, Hand gene expression and function is only known for the zebrafish, which represents the rare condition of having a single Hand gene, hand2. Read More

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Replacement of mitochondrion-rich cells during regeneration of the gills and opercular epithelium in zebrafish (Danio rerio).

Acta Histochem 2021 Jun 3;123(5):151738. Epub 2021 Jun 3.

Department of Biology, University of Ottawa, 30 Marie Curie Pvt., Ottawa, ON, K1N 6N5, Canada. Electronic address:

Transport epithelia maintain the volume, ion concentration and acid-base balance of blood and extracellular fluids. In teleost fish, mitochondrion-rich cells (MRCs) are specialized ionocytes that perform this role. These cells are found in epithelia of the gills and buccal surface of the operculum (the bony structure covering the gills). Read More

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Expression and functional analysis of the BCL2-Associated agonist of cell death (BAD) gene in grass carp (Ctenopharyngodon idella) during bacterial infection.

Dev Comp Immunol 2021 Jun 2;123:104160. Epub 2021 Jun 2.

Guangdong Provincial Water Environment and Aquatic Products Security Engineering, Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai, University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China. Electronic address:

The BCL2-associated agonist of cell death protein is a key participant in apoptosis dependent on mitochondria and in disease progression that involves the regulation of cell death, such as tumorigenesis, diabetes, sepsis shock, and epilepsy. Nevertheless, the mechanisms underlying the immune responses to teleost BAD bacterial infection and mitochondrial-dependent apoptosis remains unclear. In order to elucidate the mechanisms involved, in this study, a Ctenopharyngodon idella (grass carp) BAD gene named GcBAD1 was firstly cloned and characterized. Read More

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NK-lysin peptides ameliorate viral encephalopathy and retinopathy disease signs and provide partial protection against nodavirus infection in European sea bass.

Antiviral Res 2021 Jun 1;192:105104. Epub 2021 Jun 1.

Immunobiology for Aquaculture Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain. Electronic address:

Antimicrobial peptides (AMP) comprise a wide range of small molecules with direct antibacterial activity and immunostimulatory role and are proposed as promising substitutes of the antibiotics. Additionally, they also exert a role against other pathogens such as viruses and fungi less evaluated. NK-lysin, a human granulysin orthologue, possess a double function, taking part in the innate immunity as AMP and also as direct effector in the cell-mediated cytotoxic (CMC) response. Read More

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Morphology of the digestive system in carnivorous freshwater dourado Salminus brasiliensis.

J Fish Biol 2021 Jun 4. Epub 2021 Jun 4.

Departamento de Zootecnia, Universidade Federal de Lavras, UFLA, Lavras, Brazil.

The digestive system of teleost shows remarkable functional and morphological diversity. In this study, the digestive tract and accessory organs of dourado Salminus brasiliensis are characterized using anatomical, histological, histochemical and immunohistochemical analyses. The existence of taste buds bordered by microridges in the oesophagus of dourado was recorded for the first time, thus showing that the species drives food intake by either swallowing or rejecting the food item. Read More

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The CC and CXC chemokine receptors in turbot (Scophthalmus maximus L.) and their response to Aeromonas salmonicida infection.

Dev Comp Immunol 2021 Jun 1;123:104155. Epub 2021 Jun 1.

School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China. Electronic address:

Chemokines are crucial regulators of cell mobilization for development, homeostasis, and immunity. Chemokines signal through binding to chemokine receptors, a superfamily of seven-transmembrane domain G-coupled receptors. In the present study, eleven CC chemokine receptors (CCRs) and seven CXC chemokine receptors (CXCRs) were identified from turbot genome. Read More

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Ion-poor water and dietary salt deprivation upregulate the ghrelinergic system in the goldfish (Carassius auratus).

J Fish Biol 2021 Jun 2. Epub 2021 Jun 2.

Laboratory of Integrative Neuroendocrinology, Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

Because the ghrelinergic system in teleost fishes is broadly expressed in organs that regulate appetite as well as those that contribute to the regulation of salt and water balance, we hypothesized that manipulating salt and water balance in goldfish (Carassius auratus) would modulate the ghrelinergic system. Goldfish were acclimated to either freshwater (FW) or ion-poor FW (IPW) and were fed either a control diet containing 1% NaCl or low-salt diet containing 0.1% NaCl. Read More

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Genome-Wide Identification, Characterization and Expression Profiling of Family Genes in .

Genes (Basel) 2021 May 25;12(6). Epub 2021 May 25.

MOE Key Laboratory of Molecular Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.

Myosins are important eukaryotic motor proteins that bind actin and utilize the energy of ATP hydrolysis to perform a broad range of functions such as muscle contraction, cell migration, cytokinesis, and intracellular trafficking. However, the characterization and function of is poorly studied in teleost fish. In this study, we identified 60 family genes in a marine teleost, black rockfish (), and further characterized their expression patterns. Read More

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High Stocking Density and Food Deprivation Increase Brain Monoaminergic Activity in Gilthead Sea Bream ().

Animals (Basel) 2021 May 22;11(6). Epub 2021 May 22.

Department of Biology, Faculty of Marine and Environmental Sciences, Campus de Excelencia Internacional del Mar (CEI·MAR), Instituto Universitario de Investigación Marina (INMAR), University of Cádiz, 11519 Puerto Real, Spain.

In teleosts, brain monoamines (dopamine and serotonin) participate in the early response to different acute stressors. However, little is known regarding their role during chronic stress. In a 2 × 2 factorial design, the influence of a high stocking density (HSD) and/or food deprivation (FD) on the brain monoaminergic activity in gilthead sea bream () was evaluated. Read More

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The deep sea is a hot spot of fish body shape evolution.

Ecol Lett 2021 May 31. Epub 2021 May 31.

Department of Evolution and Ecology, University of California, Davis, CA, USA.

Deep-sea fishes have long captured our imagination with striking adaptations to life in the mysterious abyss, raising the possibility that this cold, dark ocean region may be a key hub for physiological and functional diversification. We explore this idea through an analysis of body shape evolution across ocean depth zones in over 3000 species of marine teleost fishes. We find that the deep ocean contains twice the body shape disparity of shallow waters, driven by elevated rates of evolution in traits associated with locomotion. Read More

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Immunological memory in teleost fish.

Fish Shellfish Immunol 2021 May 29;115:95-103. Epub 2021 May 29.

Faculty of Biological and Veterinary Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, Poland.

Immunological memory can be regarded as the key aspect of adaptive immunity, i.e. a specific response to first contact with an antigen, which in mammals is determined by the properties of T, B and NK cells. Read More

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