A novel histozoic myxosporean, n. sp., infecting the redbelly yellowtail fusilier, , with the creation of the Enteromyxidae n. fam., to formally accommodate this commercially important genus. | LitMetric
Institute for Experimental Pathology at Keldur, University of Iceland, Reykjavík, Iceland.
Published: July 2020
AI Article Synopsis
Article Abstract
Gastrointestinal myxosporean parasites from the genus are known to cause severe disease, resulting in high mortalities in numerous species of cultured marine fishes globally. Originally described as spp., they were transferred to a new genus, , to emphasize their novel characteristics. Their retention in the family Myxidiidae at the time was warranted, but more comprehensive phylogenetic analyses have since demonstrated the need for a new family for these parasites. We discovered a novel in wild fish from Malaysia and herein describe the fourth species in the genus and erect a new family, the Enteromyxidae n. fam., to accommodate them. n. sp. is described infecting the tissues of the stomach in the redbelly yellowtail fusilier, , from Malaysia. The new species is distinct from all others in the genus, as the myxospores although morphologically similar, are significantly smaller in size. Furthermore, small subunit ribosomal DNA sequence data reveal that is <84% similar to others in the genus, but collectively they form a robust and discrete clade, the Enteromyxidae n. fam., which is placed as a sister taxon to other histozoic marine myxosporeans. In addition, we describe, using transmission electron microscopy, the epicellular stages of and show a scanning electron micrograph of a mature myxospore of detailing the otherwise indistinct sutural line, features of the polar capsules and spore valve ridges. The Enteromyxidae n. fam. is a commercially important group of parasites infecting the gastrointestinal tract of marine fishes and the histozoic species can cause the disease enteromyxosis in intensive finfish aquaculture facilities. Epicellular and sloughed histozoic stages are responsible for fish-to-fish transmission in net pen aquaculture systems but actinospores from an annelid host are thought to be necessary for transmission to fish in the wild.
Gastrointestinal myxosporean parasites from the genus are known to cause severe disease, resulting in high mortalities in numerous species of cultured marine fishes globally. Originally described as spp., they were transferred to a new genus, , to emphasize their novel characteristics.
Recent examinations of anisakid nematodes (Anisakidae) from marine fishes off New Caledonia, collected in the years 2003-2008, revealed the presence of the following five new species of Raphidascaris Railliet et Henry, 1915, all belonging to the subgenus Ichthyascaris Wu, 1949: Raphidascaris (Ichthyascaris) spinicauda n. sp. from the redbelly yellowtail fusilier Caesio cuning (Caesionidae, Perciformes); Raphidascaris (Ichthyascaris) fasciati n.
Jakarta Bay, next to the Jakarta Metropolitan Area with around 30 million inhabitants, is facing extreme pollution. Although local coral reefs are degraded and marine resources heavily exploited, they provide livelihoods for millions of people. This study investigates anthropogenic pressures on local fisheries resources and associated livelihoods.
In this study, the complete mitogenome sequence of Redbelly yellowtail fusileer, Caesio cuning (Teleostei: Caesionidae), has been sequenced by the next-generation sequencing method. The assembled mitogenome, consisting of 16 508 bp, had the typical vertebrate mitochondrial gene arrangement, including 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNAs genes and a non-coding control region of D-loop. D-loop contains 826 bp length that is located between tRNA-Pro and tRNA-Phe.
