keyword
https://read.qxmd.com/read/38392001/molecular-rapid-test-for-identification-of-tuna-species
#1
JOURNAL ARTICLE
Isidora P Gkini, Panagiotis Christopoulos, Alexis Conides, Despina P Kalogianni, Theodore K Christopoulos
Tuna is an excellent food product, relatively low in calories, that is recommended for a balanced diet. The continuously increasing demand, especially for bluefin-tuna-based food preparations, and its relatively high market price make adulteration by intentionally mixing with other lower-priced tunas more prospective. The development of rapid methods to detect tuna adulteration is a great challenge in food analytical science. We have thus developed a simple, fast, and low-cost molecular rapid test for the visual detection of tuna adulteration...
February 2, 2024: Biosensors
https://read.qxmd.com/read/37731417/knowledge-and-awareness-about-food-allergy-among-mothers-with-allergic-children-in-the-aseer-region-saudi-arabia
#2
JOURNAL ARTICLE
Zeinh H Fardan, Mohammed Abdullah Aoun Alshahrani, Reem T Alalyani, Arwa E Alshahrani, Renad M Alshehri, Nawaf Saleh M Alshamrani, Fatimah Obaid M Aldabali, Norah Saaed A Alqahtani, Khalid Siraj S Altalhiyyah, Mahdi Muhammad M Alqahtani
Introduction Food allergies have become a significant health concern worldwide, affecting individuals of all age groups. It is particularly challenging for parents who have children diagnosed with food allergies, as they bear the responsibility of managing their child's condition and ensuring their safety. This study aimed to assess the knowledge and awareness about food allergies among mothers with allergic children in the Aseer region, Saudi Arabia. Methodology A cross-sectional study design was employed, and data were collected through a structured questionnaire administered to 400 mothers...
August 2023: Curēus
https://read.qxmd.com/read/36260545/sharks-are-the-preferred-scraping-surface-for-large-pelagic-fishes-possible-implications-for-parasite-removal-and-fitness-in-a-changing-ocean
#3
JOURNAL ARTICLE
Christopher D H Thompson, Jessica J Meeuwig
Mutualistic and commensal interactions can have significant positive impacts on animal fitness and survival. However, behavioural interactions between pelagic animals living in offshore oceanic environments are little studied. Parasites can negatively effect the fitness of their hosts by draining resources and diverting energy from growth, reproduction, and other bodily functions. Pelagic fishes are hosts to a diverse array of parasites, however their environment provides few options for removal. Here we provide records of scraping behaviour of several pelagic teleost species, a behaviour that is likely used for parasite removal...
2022: PloS One
https://read.qxmd.com/read/35512495/histogenesis-and-cell-differentiation-in-the-retina-of-thunnus-thynnus-a-morphological-and-immunohistochemical-study
#4
JOURNAL ARTICLE
Guadalupe Álvarez-Hernán, José Antonio de Mera-Rodríguez, Fernando de la Gándara, Aurelio Ortega, Inmaculada Barros-Gata, José Antonio Romero-Rodríguez, Manuel Blasco, Gervasio Martín-Partido, Joaquín Rodríguez-León, Javier Francisco-Morcillo
This study examines the anatomical development of the visual system of Atlantic bluefin tuna, Thunnus thynnus, during the first 15 days of life at histological level, with emphasis in the immunohistochemical characterization of different cell types. As an altricial fish species, the retina was not developed at hatching. The appearance of eye pigmentation and the transformation of the retina from an undifferentiated neuroblastic layer into a laminated structure occurred during the first two days of life. At 16 days after hatching (DAH), the ganglion cells were arranged in a single row in the central region of the retina and the outer segments of the photoreceptors were morphologically developed...
April 27, 2022: Tissue & Cell
https://read.qxmd.com/read/32942994/skeletal-muscle-and-cardiac-transcriptomics-of-a-regionally-endothermic-fish-the-pacific-bluefin-tuna-thunnus-orientalis
#5
JOURNAL ARTICLE
Adam Ciezarek, Luke Gardner, Vincent Savolainen, Barbara Block
BACKGROUND: The Pacific bluefin tuna (Thunnus orientalis) is a regionally endothermic fish that maintains temperatures in their swimming musculature, eyes, brain and viscera above that of the ambient water. Within their skeletal muscle, a thermal gradient exists, with deep muscles, close to the backbone, operating at elevated temperatures compared to superficial muscles near the skin. Their heart, by contrast, operates at ambient temperature, which in bluefin tunas can range widely. Cardiac function in tunas reduces in cold waters, yet the heart must continue to supply blood for metabolically demanding endothermic tissues...
September 17, 2020: BMC Genomics
https://read.qxmd.com/read/31817288/effect-of-salt-addition-time-on-the-nutritional-profile-of-thunnus-obesus-head-soup-and-the-formation-of-micro-nano-sized-particle-structure
#6
JOURNAL ARTICLE
Xinyi Fan, Xiaopeng Li, Ningping Tao, Jing Zhang, Mingfu Wang, Xueli Qian, Hong Su, Jian Zhong
In order to investigate the effects of salt on the nutrients and tastes profiles of big eye tuna head soup, the typical nutrients and taste substances were analyzed. The formation and the morphology of micro/nanoparticles (MNPs) were studied using an inverted optical microscope, and the interactions among components in MNPs were studied using a laser scanning confocal microscope. The results showed that the nutrients were dissolved to the maximum in the soup when salt was added at 150 min of cooking. Comparatively, much smaller MNPs with a more stable bilayer were formed at the same salt addition time...
December 4, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/31689924/comparison-of-the-fatty-acid-and-triglyceride-profiles-of-big-eye-tuna-thunnus-obesus-atlantic-salmon-salmo-salar-and-bighead-carp-aristichthysnobilis-heads
#7
JOURNAL ARTICLE
Jing Zhang, Ningping Tao, Yueliang Zhao, Xichang Wang, Mingfu Wang
Big eye tuna ( Thunnus obesus ), Atlantic salmon ( Salmo salar ) and bighead carp ( Aristichthys nobilis ) are three representative marine and fresh water fishes. In this study, the content of total lipids (TL), triglyceride (TG) fraction, and the fatty acid profiles in the corresponding fish heads were analyzed. Meanwhile, their complicated TG molecular species were further characterized. The results showed that TG was the major lipid in these three fish heads (60.58-86.69%). Compared with other two fish heads, big eye tuna head was the most abundant in polyunsaturated fatty acids, among which eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) accounted for 64...
November 4, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/31669375/molecular-and-functional-characterisation-of-a-putative-elovl4-gene-and-its-expression-in-response-to-dietary-fatty-acid-profile-in-atlantic-bluefin-tuna-thunnus-thynnus
#8
JOURNAL ARTICLE
Mónica B Betancor, Angela Oboh, Aurelio Ortega, Gabriel Mourente, Juan C Navarro, Fernando de la Gándara, Douglas R Tocher, Óscar Monroig
Elongation of very long-chain fatty acid 4 (Elovl4) proteins are involved in the biosynthesis of very long-chain (>C24 ) fatty acids and in many teleost fish species they are key enzymes in the pathway for the production of docosahexaenoic acid (DHA; 22:6n-3) from eicosapentaenoic acid (EPA; 20:5n-3). Therefore, Elovl4 may be particularly important in Atlantic bluefin tuna (ABT; Thunnus thynnus) characterised by having high DHA to EPA ratios. The present study cloned and characterised both the function and expression of an elovl4 cDNA from ABT...
February 2020: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://read.qxmd.com/read/30364966/phylotranscriptomic-insights-into-the-diversification-of-endothermic-thunnus-tunas
#9
JOURNAL ARTICLE
Adam Ciezarek, Owen Osborne, Oliver N Shipley, Edward J Brooks, Sean Tracey, Jaime McAllister, Luke Gardner, Michael J E Sternberg, Barbara Block, Vincent Savolainen
Birds, mammals, and certain fishes, including tunas, opahs and lamnid sharks, are endothermic, conserving internally generated, metabolic heat to maintain body or tissue temperatures above that of the environment. Bluefin tunas are commercially important fishes worldwide and some populations are threatened. They are renowned for their endothermy, maintaining elevated temperatures of the oxidative locomotor muscle, viscera, brain and eyes, and occupying cold, productive high-latitude waters. Less cold-tolerant tunas, such as yellowfin tuna, by contrast, remain in warm-temperate to tropical waters year-round, reproducing more rapidly than most temperate bluefin tuna populations, providing resiliency in the face of large scale industrial fisheries...
October 26, 2018: Molecular Biology and Evolution
https://read.qxmd.com/read/29629208/a-highly-sensitive-and-selective-colorimetric-hg-2-ion-probe-using-gold-nanoparticles-functionalized-with-polyethyleneimine
#10
JOURNAL ARTICLE
Kyung Min Kim, Yun-Sik Nam, Yeonhee Lee, Kang-Bong Lee
A highly sensitive and selective colorimetric assay for the detection of Hg2+ ions was developed using gold nanoparticles (AuNPs) conjugated with polyethyleneimine (PEI). The Hg2+ ion coordinates with PEI, decreasing the interparticle distance and inducing aggregation. Time-of-flight secondary ion mass spectrometry showed that the Hg2+ ion was bound to the nitrogen atoms of the PEI in a bidentate manner (N-Hg2+ -N), which resulted in a significant color change from light red to violet due to aggregation. Using this PEI-AuNP probe, determination of Hg2+ ion can be achieved by the naked eye and spectrophotometric methods...
2018: Journal of Analytical Methods in Chemistry
https://read.qxmd.com/read/28559633/studies-on-chemical-composition-of-yellowfin-tuna-thunnus-albacares-bonnaterre-1788-eye
#11
JOURNAL ARTICLE
Vijayakumar Renuka, Abubacker Aliyamveetil Zynudheen, Satyen Kumar Panda, Chandragiri Nagaraja Rao Ravishankar
Chemical composition viz ., fatty acids, amino acids and minerals of yellowfin tuna ( Thunnus albacares) eye were analyzed for better utilization of fish processing discards. Analysis of fatty acids composition by gas chromatography-mass spectrometry revealed the presence of polyunsaturated fatty acids namely docosahexaenoic acid, eicosapentaenoic acid, arachidonic acid and linoleic acid at the levels of 37.8, 7.1, 3.6 and 1.4%, respectively. The major available monounsaturated fatty acids, palmitoleic acid and oleic acid were present at the level of 17...
May 2017: Journal of Food Science and Technology
https://read.qxmd.com/read/27389980/development-vs-behavior-a-role-for-neural-adaptation-in-evolution
#12
REVIEW
Alain Ghysen, Christine Dambly-Chaudière
We examine the evolution of sensory organ patterning in the lateral line system of fish. Based on recent studies of how this system develops in zebrafish, and on comparative analyses between zebrafish and tuna, we argue that the evolution of lateral line patterns is mostly determined by variations in the underlying developmental processes, independent of any selective pressure. Yet the development of major developmental innovations is so directly linked to their exploitation that it is hard not to think of them as selected for, i...
2016: International Journal of Developmental Biology
https://read.qxmd.com/read/22740728/tuna-cornea-as-biomaterial-for-cardiac-applications
#13
COMPARATIVE STUDY
Roberto Parravicini, Flavio Cocconcelli, Alessandro Verona, Valeriano Parravicini, Enrico Giuliani, Alberto Barbieri
Among available biomaterials, cornea is almost completely devoid of cells and is composed only of collagen fibers oriented in an orderly pattern, which contributes to low antigenicity. Thunnus thynnus, the Atlantic bluefin tuna, is a fish with large eyes that can withstand pressures of approximately 10 MPa. We evaluated the potential of this tuna cornea in cardiac bioimplantation. Eyes from freshly caught Atlantic bluefin tuna were harvested and preserved in a fixative solution. Sterilized samples of corneal stroma were embedded in paraffin and stained with hematoxylin and eosin, and the histologic features were studied...
2012: Texas Heart Institute Journal
https://read.qxmd.com/read/22347303/infection-of-anisakids-larvae-in-long-tail-tuna-thunnus-tonggol-in-north-persian-gulf
#14
JOURNAL ARTICLE
A Eslami, H Sabokroo, Sh Ranjbar-Bahadori
BACKGROUND: The aim of this paper was to study the prevalence and intensity of Anisakids larvae in the long tail tuna fish captured from Iranian shores of Persian Gulf. METHODS: Different organs including skin, abdominal cavity, stomach and intestinal contents, stomach sub serous tissues, liver, spleen, gonads and 20 grams of muscles of 100 long tail tuna fish (Thannustonggol) caught from waters of the north parts of Persian Gulf were searched for anisakid nematodes larvae...
August 2011: Iranian Journal of Parasitology
https://read.qxmd.com/read/20667881/warm-fish-with-cold-hearts-thermal-plasticity-of-excitation-contraction-coupling-in-bluefin-tuna
#15
JOURNAL ARTICLE
H A Shiels, A Di Maio, S Thompson, B A Block
Bluefin tuna have a unique physiology. Elevated metabolic rates coupled with heat exchangers enable bluefin tunas to conserve heat in their locomotory muscle, viscera, eyes and brain, yet their hearts operate at ambient water temperature. This arrangement of a warm fish with a cold heart is unique among vertebrates and can result in a reduction in cardiac function in the cold despite the elevated metabolic demands of endothermic tissues. In this study, we used laser scanning confocal microscopy and electron microscopy to investigate how acute and chronic temperature change affects tuna cardiac function...
January 7, 2011: Proceedings. Biological Sciences
https://read.qxmd.com/read/20605071/concurrent-epizootic-hyperinfections-of-sea-lice-predominantly-caligus-chiastos-and-blood-flukes-cardicola-forsteri-in-ranched-southern-bluefin-tuna
#16
JOURNAL ARTICLE
Craig J Hayward, David Ellis, Danielle Foote, Ryan J Wilkinson, Phillip B B Crosbie, Nathan J Bott, Barbara F Nowak
Peaks in epizootics of sea lice (mostly Caligus chiastos) and blood flukes (Cardicola forsteri) among Southern Bluefin tuna (Thunnus maccoyii) appear to coincide with the onset of an increased mortality. The mortality event occurs 6-12 weeks after T. maccoyii have been transferred into static ranching pontoons from the wild. However, to date available data on parasite occurrence before commercial harvesting begins, are scant. This research gathered epizootiological data from weeks 4 to 13 post-transfer, for 153 T...
October 11, 2010: Veterinary Parasitology
https://read.qxmd.com/read/20416385/evolutionary-affinity-of-billfishes-xiphiidae-and-istiophoridae-and-flatfishes-plueronectiformes-independent-and-trans-subordinal-origins-of-endothermy-in-teleost-fishes
#17
JOURNAL ARTICLE
A G Little, S C Lougheed, C D Moyes
Billfishes (Scombroidei) and tunas (Scombridae), both considered part of the suborder Scombroidei, have long been studied by biologists largely because of their remarkable physiological and anatomical muscular adaptations associated with regional endothermy and continuous swimming. These attributes, combined with analyses of other morphological and molecular data, have led to a general perception that tunas and billfishes are close relatives, though this hypothesis has been vigorously debated. Using Bayesian phylogenetic analysis of nine mitochondrial and three nuclear loci (>7000bp), we show that billfishes are only distantly related to tunas, but rather share strong evolutionary affinities with flatfishes (Pleuronectiformes) and jacks (Carangidae)...
September 2010: Molecular Phylogenetics and Evolution
https://read.qxmd.com/read/20167250/small-angle-x-ray-scattering-studies-of-the-intact-eye-lens-effect-of-crystallin-composition-and-concentration-on-microstructure
#18
JOURNAL ARTICLE
Amir Y Mirarefi, Sébastien Boutet, Subramanian Ramakrishnan, Andor J Kiss, Chi-Hing C Cheng, Arthur L Devries, Ian K Robinson, Charles F Zukoski
BACKGROUND: The cortex and nucleus of eye lenses are differentiated by both crystallin protein concentration and relative distribution of three major crystallins (alpha, beta, and gamma). Here, we explore the effects of composition and concentration of crystallins on the microstructure of the intact bovine lens (37 degrees C) along with several lenses from Antarctic fish (-2 degrees C) and subtropical bigeye tuna (18 degrees C). METHODS: Our studies are based on small-angle X-ray scattering (SAXS) investigations of the intact lens slices where we study the effect of crystallin composition and concentration on microstructure...
June 2010: Biochimica et Biophysica Acta
https://read.qxmd.com/read/19875819/electroretinographic-analysis-of-night-vision-in-juvenile-pacific-bluefin-tuna-thunnus-orientalis
#19
COMPARATIVE STUDY
Taro Matsumoto, Hiroshi Ihara, Yoshinari Ishida, Tokihiko Okada, Michio Kurata, Yoshifumi Sawada, Yasunori Ishibashi
We used electroretinogram recordings to investigate visual function in the dark-adapted eyes of the juvenile scombrid fishes Pacific bluefin tuna (Thunnus orientalis) and chub mackerel (Scomber japonicus) and the carangid fish striped jack (Pseudocaranx dentex). Despite the fast swimming speed of the Pacific bluefin tuna, analysis of flicker electroretinograms showed that visual temporal resolution in this species was inferior to that in chub mackerel. Peak wavelengths of spectral sensitivity in Pacific bluefin tuna and striped jack were 479 and 512 nm, respectively...
October 2009: Biological Bulletin
https://read.qxmd.com/read/19245634/seasonal-epizootics-of-sea-lice-caligus-spp-on-southern-bluefin-tuna-thunnus-maccoyii-castelnau-in-a-long-term-farming-trial
#20
JOURNAL ARTICLE
C J Hayward, N J Bott, B F Nowak
Within the typical 2-8 month (January to August inclusive) farming cycle for southern bluefin tuna, Thunnus maccoyii (Castelnau), in Spencer Gulf, South Australia, counts of a sea louse, Caligus chiastos Lin et Ho, 2003, were strongly statistically associated with both fish condition and severity of eye damage. During a trial examining the feasibility of maintaining T. maccoyii in farms for more than 1 year, including over the summer season when temperatures may exceed 24 degrees C, we collected additional epidemiological data on burdens of sea lice over a 17-month period (April 2005 to August 2006 inclusive), on a total of 200 T...
January 2009: Journal of Fish Diseases
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