Abstract
Simple SummaryThe spotted scat, Scatophagus argus, is a marine aquaculture fish species that is economically important in Asia. As the spotted scat exhibits notable sexual dimorphism with respect to growth, aquaculture efficiency can be increased through the practice of sex control breeding. However, genomic data from S. argus is lacking. In the present study, a genomic survey was conducted using next-generation sequencing technologies. Data, including the size of the genome, sequence repeat ratio, heterozygosity ratio, whole genome sequence and gene annotation were obtained. This information will serve to support the breeding and aquaculture of S. argus.The spotted scat, Scatophagus argus, is a species of fish that is widely propagated within the Chinese aquaculture industry and therefore has significant economic value. Despite this, studies of its genome are severely lacking. In the present study, a genomic survey of S. argus was conducted using next-generation sequencing (NGS). In total, 55.699 GB (female) and 51.047 GB (male) of high-quality sequence data were obtained. Genome sizes were estimated to be 598.73 (female) and 597.60 (male) Mbp. The sequence repeat ratios were calculated to be 27.06% (female) and 26.99% (male). Heterozygosity ratios were 0.37% for females and 0.38% for males. Reads were assembled into 444,961 (female) and 453,459 (male) contigs with N50 lengths of 5,747 and 5,745 bp for females and males, respectively. The average guanine-cytosine (GC) content of the female genome was 41.78%, and 41.82% for the male. A total of 42,869 (female) and 43,283 (male) genes were annotated to the non-redundant (NR) and SwissProt databases. The female and male genomes contained 66.6% and 67.8% BUSCO core genes, respectively. Dinucleotide repeats were the dominant form of simple sequence repeats (SSR) observed in females (68.69%) and males (68.56%). Additionally, gene fragments of Dmrt1 were only observed in the male genome. This is the first report of a genome-wide characterization of S. argus.
Highlights
The spotted scat, Scatophagus argus, (Perciformes, Scatophagidae), is a popular species of fish known for both its aesthetic value and human consumption due to its rhombic spotted body and high nutrient value [1,2,3]
Q30 scores assigned to 91.94% and 92.03% of the female and male libraries, respectively
It was observed that the best BLAST results of reads were enriched for closely related fish species, including Dicentrarchus labrax, Scatophagus argus, Haplochromis burtoni and Oreochromis niloticus (Table S1)
Summary
The spotted scat, Scatophagus argus, (Perciformes, Scatophagidae), is a popular species of fish known for both its aesthetic value and human consumption due to its rhombic spotted body and high nutrient value [1,2,3]. Unlike other species, the cultivation of S. argus is relatively easy with low cost of feeding and high market price, making it an important farmed fish with considerable. S. argus is a leading seafood for both its desirable taste and high nutritional value [1,8]. The adaptability of S. argus to a broad range of temperatures and levels of salinity, combined with their excellent edibility, has enabled it to become an attractive aquaculture species in China. In the absence of proper management, this has the potential to endanger the resource through overfishing [10]
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