Silurus asotus
Linnaeus, 1758 · speciesAt a glance
Sources12 archives
Databases and archives Silurus asotus's data was compiled from.
WikipediaWikimedia Foundation12 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 337 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI107 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics153 specimens↗
LOTUSNatural Products (Wikidata)compounds↗
Open Tree of LifeOpenTreephylogeny backbone↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
NCBIUS National Library of Medicinegenome & karyotype↗
WikidataWikimedia Foundationstructured facts↗
Catalogue of LifeCOLtaxonomy↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
The Amur catfish, or Japanese common catfish, Silurus asotus,ITIS (gov) is a species of catfish (sheatfish), family Siluridae. It is a large freshwater fish found in continental East Asia and in Japan. It prefers slow-flowing rivers, lakes, and irrigation canals. Its appearance is typical of a large silurid catfish. Larval S. asotus specimens have three pairs of barbels (one maxillary, two mandibular), while adult fish have only two pairs (one maxillary, one mandibular); second pair of mandibular barbels degenerates."Relationship between external and internal morphological changes and feeding habits in the fry state of Japanese Catfish Silurius Asotus" , 1999, Osamu Yada and Atsushi Furukawa, UJNR Aquaculture 28th Panel Proceedings This species grows to 130 cm in total length.
No narrative description available for this taxon yet.
Size & morphology2
Habitat & environment2
Uses & economy1
Other traits1
Compounds documented for Silurus asotus across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile5 classes
Documented compounds21 total
| Compound | Class | Amount | Source |
|---|---|---|---|
| (1R)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexen-1-yl)octadeca-1,3,5,7,9,11,13,15-octaenyl]cyclohex-3-en-1-ol | present | LOTUS | |
| (1R)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15Z)-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexen-1-yl)octadeca-1,3,5,7,9,11,13,15-octaenyl]cyclohex-3-en-1-ol | present | LOTUS | |
| (1R)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,16R)-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexen-1-yl)octadeca-1,3,5,7,9,11,13-heptaenyl]cyclohex-3-en-1-ol | present | LOTUS | |
| (1R)-3,5,5-trimethyl-4-[(3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexen-1-yl)octadeca-3,5,7,9,11,13,15,17-octaenyl]cyclohex-3-en-1-ol | present | LOTUS | |
| (1R)-4-[(3E,5E,7E,9E,11E,13E,15E)-18-[(4R)-4-hydroxy-2,6,6-trimethylcyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-3,5,7,9,11,13,15-heptaen-17-ynyl]-3,5,5-trimethylcyclohex-3-en-1-ol | present | LOTUS | |
| (1S)-4-[(3E,5E,7E,9E,11E,13E,15Z)-18-[(4S)-4-hydroxy-2,6,6-trimethylcyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-3,5,7,9,11,13,15-heptaenyl]-3,5,5-trimethylcyclohex-3-en-1-ol | present | LOTUS | |
| (1S)-4-[(3E,5E,7E,9E,11E,13E,15Z,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethylcyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-3,5,7,9,11,13,15,17-octaenyl]-3,5,5-trimethylcyclohex-3-en-1-ol | present | LOTUS | |
| (1S)-4-[(3Z,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethylcyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-3,5,7,9,11,13,15,17-octaenyl]-3,5,5-trimethylcyclohex-3-en-1-ol | present | LOTUS | |
| (1S,4S)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-[(1S)-2,6,6-trimethylcyclohex-2-en-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-2-en-1-ol | present | LOTUS | |
| (1S,4S)-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4S)-4-hydroxy-2,6,6-trimethylcyclohex-2-en-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-3,5,5-trimethylcyclohex-2-en-1-ol | present | LOTUS |
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Silurus asotus has left across the world's sequence archives.
At a glance
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
Besides the big genome in the nucleus, cells carry a small, circular loop of DNA inside the cell's energy factories — the mitochondria. It is inherited almost only from the mother and is a leftover from ancient bacteria that moved into the cell. The mitochondrial markers above (ND*, COX, CYTB…) are read from exactly this loop. Outer ring = one strand, inner ring = the other.
The complete instruction manual Silurus asotus carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
Record type2 337 records
Origin
Range
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions10 of 20 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| MNHAHlocation not on record | 401 |
| NSMKlocation not on record | 275 |
| Gifu prefectural Museumlocation not on record | 42 |
| Kagoshima University Museumlocation not on record | 32 |
| Stockholm, SE | 23 |
| CASlocation not on record | 21 |
| FishBaselocation not on record | 20 |
| Cambridge, US | 8 |
| Fisheries Research Laboratory, Mie Universitylocation not on record | 5 |
| 4 | |
| Tomioka, JP | 4 |
| Toronto, CA | 3 |
| Paris, FR | 2 |
| Helsinki, FI | 2 |
| Vancouver, CA | 2 |
| Yokosuka City Museumlocation not on record | 2 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 1 |
| Zoologisches Museum Hamburglocation not on record | 1 |
| Bonn, DE | 1 |
| Chicago, US | 1 |
Where the DNA of Silurus asotus was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Where its DNA was found
How strong is each trace?
Modelled climatemodelled
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.