Alosa chrysochloris

(Rafinesque, 1820) · species

image placeholder — illustration coming later

Animalia/Chordata/Clupeiformes/Clupeidae/Alosa

At a glance

Occurrence records3 349

Data sources11

Biological traits9

DNA specimens3

eDNA detections1

Sources11 archives

Databases and archives Alosa chrysochloris's data was compiled from.

WikipediaWikimedia Foundation3 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility1 996 records↗

OBISOcean Biodiversity Information System1 353 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics3 specimens↗

Open Tree of LifeOpenTreephylogeny backbone↗

GoaTGenomes on a Tree · Sangergenome ~1.08 Gbp↗

WikidataWikimedia Foundationstructured facts↗

Catalogue of LifeCOLtaxonomy↗

GLoBIGlobal Biotic Interactionsbiotic interactions↗

On this page6 sections

Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.

NarrativeWikipediaarticle

Traits & measurements2 literature sources9 traits

Occurrence & distributionGBIF · OBIS3 349 records

Environmental DNA1 datasets · 1 countries1 detections

DNA & barcodingBOLD3 specimens

Genome at a glanceGoaT1.1 Gbp

01Narrative

The skipjack shad (Alosa chrysochloris) is a North American, migratory, fresh- and brackish water fish species in the herring family Clupeidae. The name skipjack shad comes from the fact that it is commonly seen leaping out of the water while feeding. Other common names include blue herring, golden shad, river shad, Tennessee tarpon, and McKinley shad. The skipjack shad is restricted to the Gulf of Mexico drainage basins. Skipjack shad are found in clear to moderately turbid water in areas with flow. Because they are a migratory species, dams often impede their reproduction. Records suggest that this species was much more abundant in the Upper Mississippi River basin before it was impounded. Currently, the skipjack shad is most abundant in the Upper Mississippi River below the mouth of the Ohio River. They are known as an "early-run" species as they migrate to spawn in the early spring.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesAnAgeFishBase

Size & morphology2

Body length50 cm

Body mass935 g

⚠ sources differ — AnAge: 935 g · FishBase: 1 700 g

Life cycle & reproduction1

Max. longevity48 months

Habitat & environment4

Habitat brackishyes

Habitat freshwateryes

Habitat saltwateryes

Habitat zonepelagic-neritic

Uses & economy1

Commercial importanceminor commercial

Other traits1

Vulnerability44.4

05DNA & barcoding3 specimens

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 Alosa chrysochloris has left across the world's sequence archives.

At a glance

DNA specimens3

BINs1

Marker genes1

eDNA detections1

Countries1

Marker genes sequenced

★ 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.

★COI-5P

animal barcode

06Genome at a glanceGoaT

The complete instruction manual Alosa chrysochloris 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

Genome size1 075 800 000 bp

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).

BACTERIUM Carsonella ruddii0.00016 Gb

FUNGUS0.04 Gb

INSECT0.25 Gb

THIS GENOME Alosa chrysochloris1.08 Gb

HUMAN3.2 Gb

WHEAT17 Gb

FERN Tmesipteris160.45 Gb

07Deep time~11.1 Ma lineage

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

DNA clock origin11.1 Ma TimeTree

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.

DNA clock origin

08Occurrence & distribution

Record type3 349 records

Wild obs. + sensor960

Museum / vouchered2 326

Other63

Origin

Native138

Range

Area of Occupancy AOO4 912 km²

Depth

0–200 m sunlit129

200–1000 m twilight0

1–4 km midnight0

>4 km abyssal0

median 0.9 m · max 30 m · 129 records with depth

Wildobservation + sensor

Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.

Coordinate accuracy92% within 1 km

≤100 m 353≤1 km 56≤10 km 14>10 km 23

446 georeferenced · 514 without coordinates

Open the mapobservation + sensor960

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.

Coordinate accuracy72% within 1 km

≤100 m 199≤1 km 66≤10 km 82>10 km 20

367 georeferenced · 1 959 without coordinates

Open the institutions mapphysical evidence2 326

Wildobservation + sensor

Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.

10Collections & institutions

Holding institutions11 of 30 geolocated

Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.

Institution	Specimens
Champaign, US	273
University of Texas Biodiversity Collections (UTBC)location not on record	238
Ohio State University - Fish Division, Columbus, OH (OSUM)location not on record	191
University of Alabamalocation not on record	108
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record	104
Montgomery, US	48
Ann Arbor, US	36
Washington, US	17
Southeastern Louisiana University, Vertebrate Museumlocation not on record	15
Sam Noble Oklahoma Museum of Natural Historylocation not on record	13
Louisiana State University, Museum of Zoologylocation not on record	12
Texas Cooperative Wildlife Collectionlocation not on record	10
Chicago, US	10
Los Angeles, US	8
North Carolina Museum of Natural Scienceslocation not on record	8
Texas Memorial Museum, Texas Natural History Collectionlocation not on record	6
Cambridge, US	5
Toronto, CA	3
APSUlocation not on record	2
Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institutelocation not on record	2
CASlocation not on record	1
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record	1
New Haven, US	1
ISUAlocation not on record	1
Wuzhou, CN	1
FishBaselocation not on record	1
PUC-RSlocation not on record	1
Central Michigan University Museum of Cultural and Natural Historylocation not on record	1
München, DE	1
Oregon State Universitylocation not on record	1

30 institutions · 1 119 of 2 326 vouchered records shown

09Environmental DNA1 detections

Where the DNA of Alosa chrysochloris 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

Detections DNA found1

Studies independent surveys1

Countries1

Signal confidence: weakweighed across independent studies, places & mapped detections

Where its DNA was found

0 of 1 detections have coordinates

Open the map1 country0

How strong is each trace?

DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.

Modelled climatemodelled

−15°Ctemperature across detection sites+40°C

Temperature median18.6 °C 18.6–18.6

Seasonal swing summer↔winter27.6 °C

Max temp (day)24.2 °C

Min temp (night)14.0 °C

Precipitation138 mm/mo

Air humidity56.6 %

Moisture balance-6.00 mm/mo

Vapour deficit931 Pa

Wind speed2.90 m/s

Cloud cover39.2 %

CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · median with p10–p90 · reflects where sampling happened, not only the true niche

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.

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The Life Data · species page · narrative wired to read_model image placeholder · 3D tilt requires an http server (WebGL)

Alosa chrysochloris

At a glance

Sources11 archives

Size & morphology2

Life cycle & reproduction1

Habitat & environment4

Uses & economy1

Other traits1

At a glance

Genome sizehow big the whole instruction manual is

At a glance

When this lineage existed

Record type3 349 records

Origin

Range

Depth

Wildobservation + sensor

Museum / Voucheredphysical evidence

Wildobservation + sensor

Holding institutions11 of 30 geolocated

Signal

Where its DNA was found

How strong is each trace?

Modelled climatemodelled

Record type3 349 records