| characterization of bullet tuna myoglobin with reference to the thermostability-structure relationship. | myoglobin (mb) was isolated from bullet tuna (auxis rochei) skeletal muscle and characterized from the viewpoint of the thermostability-structure relationship. differential scanning calorimetry (dsc) measurement showed that the thermostability of bullet tuna mb was the lowest among all the scombridae fish mbs so far examined. the highest value (72.8 degrees c) of melting temperature (tm) was obtained at ph 6.52. alpha-helical content at 10 degrees c was 34.5%, clearly lower than that of horse mb ... | 2005 | 15941343 |
| two species of the fish digenean genus rhipidocotyle diesing, 1858 (bucephalidae) reported for the first time from european seas. | two species of rhipidocotyle are described from waters off the scandola nature reserve, corsica, france: these are the first records of these species from the mediterranean sea. r. capitata (linton, 1940) from auxis rochei and r. longicirrus (nagaty, 1937) n. comb. (originally bucephalopsis longicirrus nagaty, 1937) from seriola dumerili are also compared with similar species. r. capitata is similar to several other species of rhipidocotyle from scombrids, but differs in the structure of the rhy ... | 2005 | 16132870 |
| anisakis (nematoda: ascaridoidea) from indonesia. | despite indonesia's high marine biodiversity, there is a lack of information regarding fish parasites in indonesian waters. during a sampling of 136 teleost species from indonesian waters, 22 of them were infected with larvae of anisakis dujardin, 1845, a genus with zoonotic potential. we genetically identified 118 worms, provide a revision of all available sequences of the its-1-5.8s-its-2 marker from indonesian anisakis in genbank (n = 125), and establish 16 new host records. so far, 53 indone ... | 2017 | 28262635 |
| molecular identification of atlantic bluefin tuna (thunnus thynnus, scombridae) larvae and development of a dna character-based identification key for mediterranean scombrids. | the atlantic bluefin tuna, thunnus thynnus, is a commercially important species that has been severely over-exploited in the recent past. although the eastern atlantic and mediterranean stock is now showing signs of recovery, its current status remains very uncertain and as a consequence their recovery is dependent upon severe management informed by rigorous scientific research. monitoring of early life history stages can inform decision makers about the health of the species based upon recruitm ... | 2015 | 26147931 |
| the differentiation of tuna (family: scombridae) products through the pcr-based analysis of the cytochrome b gene and parvalbumin introns. | in spite of the many studies performed over the years, there are still problems in the authentication of closely related tuna species, not only for canned fish but also for raw products. with the aim of providing screening methods to identify different tuna species and related scombrids, segments of mitochondrial cytochrome b (cyt b) and nuclear parvalbumin genes were amplified and sequenced or subjected to single-strand conformation polymorphism (sscp) and restriction fragment length polymorphi ... | 2016 | 25639273 |
| mitochondrial genome of the bullet tuna auxis rochei from indo-west pacific collection provides novel genetic information about two subspecies. | previously morphological studies supported the division of the bullet tuna into the two subspecies, auxis rochei rochei and a. rochei eudorax. as a cosmopolitan species, a. rochei rochei ranges in the indo-west pacific and atlantic oceans, while a. rochei eudorax inhabits in eastern pacific region. here, we used the hiseq next-generation sequencing technique to determine the mitochondrial genome (mitogenome) of a. rochei from indo-west pacific collection, and then compared our data with mitogeno ... | 2016 | 25629476 |
| metazoan parasites in the head region of the bullet tuna auxis rochei (osteichthyes: scombridae) from the western mediterranean sea. | the head region of 72 bullet tuna auxis rochei from the western mediterranean sea (south-east spain and the strait of gibraltar) was examined for parasites. seven metazoan species were found in the fish from south-east spain: three monogeneans, two trematodes and two copepods, whereas only three species were isolated in the fish from the strait of gibraltar. a comparison of the levels of infection of the parasites according to fish size in south-east spain showed that the prevalence of didymozoo ... | 2015 | 25212556 |
| evolutionary history and phylogenetic relationship between auxis thazard and auxis rochei inferred from coi sequences of mtdna. | tunas of the genus auxis are cosmopolitan species and the smallest members of the tribe thunnini, the true tunas. in the present study, coi sequences of mtdna were employed to examine the evolutionary history and phylogenetic relationship between a. thazard and a. rochei. a total of 29 coi sequences were retrieved from ncbi. historic demographic analyses of sequence data showed that a. thazard has undergone sudden population expansion in the past while population size of a. rochei has been remai ... | 2013 | 24084241 |
| massive consumption of gelatinous plankton by mediterranean apex predators. | stable isotopes of carbon and nitrogen were used to test the hypothesis that stomach content analysis has systematically overlooked the consumption of gelatinous zooplankton by pelagic mesopredators and apex predators. the results strongly supported a major role of gelatinous plankton in the diet of bluefin tuna (thunnus thynnus), little tunny (euthynnus alletteratus), spearfish (tetrapturus belone) and swordfish (xiphias gladius). loggerhead sea turtles (caretta caretta) in the oceanic stage an ... | 2012 | 22470416 |
| complete mitochondrial dna sequences of the frigate tuna auxis thazard and the bullet tuna auxis rochei. | the complete mitochondrial dna sequence of the frigate tuna auxis thazard and two divergent mitotypes (mitotype i and mitotype ii) of the bullet tuna auxis rochei have been determined. the total length of the mitogenomes was 16,506, 16,501 and 16,503 bp, respectively. all mitogenomes had a gene content (13 protein-coding, 2 rrnas and 22 trnas) and organization similar to those observed in most other vertebrates. the major non-coding region (control region) ranged between 843 and 847 bp in length ... | 2008 | 18464037 |
| novel method for the authentication of frigate tunas (auxis thazard and auxis rochei) in commercial canned products. | a novel procedure for the authentication of frigate tunas (auxis thazard and auxis rochei) in commercially canned products has been developed. three mitochondrial regions were simultaneously amplified by multiplex-polymerase chain reaction, one corresponding to the small rrna 12s subunit as a positive amplification control and two species-specific fragments corresponding to cytochrome b for a. rochei and atpase 6 for a. thazard, respectively. testing of two different detection systems revealed t ... | 2004 | 15675785 |