Columbia River Signal Crayfish

Pacifastacus leniusculus (Dana 1852)

JC Schou cc-by-nc

Pacifastacus leniusculus (Columbia River Signal Crayfish) is a species of decapods in the family freshwater crayfishes. They are associated with freshwater habitat. They are native to United States and Canada. They rely on drag powered swimming to move around.

URI: http://purl.obolibrary.org/obo/ENVO_00000873
Definition: A biome that applies to the freshwater realm.

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URI: http://www.geonames.org/6252001

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URI: http://www.geonames.org/6251999

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URI: https://eol.org/schema/terms/drag_based_swimming
Definition: Drag swimmers use a cyclic motion where they push water back in a power stroke, and return their limb forward in the return or recovery stroke. When they push water directly backwards, this moves their body forward, but as they return their limbs to the starting position, they push water forward, which will thus pull them back to some degree, and so opposes the direction that the body is heading. This opposing force is called drag. The return-stroke drag causes drag swimmers to employ different strategies than lift swimmers. Reducing drag on the return stroke is essential for optimizing efficiency.

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EOL has data for 21 attributes, including:

Body symmetry
- URI: http://eol.org/schema/terms/body_symmetry
- Definition: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
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bilaterally symmetric
- URI: http://purl.obolibrary.org/obo/PATO_0001324
- Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves
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cellularity
- URI: http://purl.obolibrary.org/obo/PATO_0001992
- Definition: An organismal quality inhering in a bearer by virtue of the bearers consisting cells. [ PATOC:GVG ]
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multicellular
- URI: http://purl.obolibrary.org/obo/PATO_0001993
- Definition: A cellularity quality inhering in a bearer by virtue of the bearers consisting of more than one cell. [ PATOC:GVG ]
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geographic distribution includes
- URI: http://eol.org/schema/terms/Present
- Definition: This organism is known to be present in this location or region. Not exclusive; other regions may also be reported.
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Alaska
- URI: https://www.wikidata.org/entity/Q797
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habitat
- URI: http://purl.obolibrary.org/obo/RO_0002303
- Definition: x has habitat y if: x is an organism, y is a habitat, and y can sustain and allow the growth of a population of x
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lake
- URI: http://purl.obolibrary.org/obo/ENVO_01000252
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habitat
- URI: http://rs.tdwg.org/dwc/terms/habitat
- Definition: A category or description of the habitat in which the Event occurred.
- Comment: Example: "oak savanna", "pre-cordilleran steppe"
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freshwater habitat
- URI: http://purl.obolibrary.org/obo/ENVO_00002037
- Definition: A habitat that is in or on a body of water containing low concentrations of dissolved salts and other total dissolved solids (<0.5 grams dissolved salts per litre).
- Comment: Ontology Description: http://environmentontology.org/ Ontology Source: http://envo.googlecode.com/svn/trunk/src/envo/envo.owl
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invasive in
- URI: http://eol.org/schema/terms/InvasiveRange
- Definition: Information about the jurisdictions where the taxon is considered to be an invasive organism due to its negative impact on human welfare or ecosystems.
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Alaska
- URI: http://www.geonames.org/5879092
- Attribution: GeoNames
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locomotion
- URI: http://purl.obolibrary.org/obo/GO_0040011
- Definition: Self-propelled movement of a cell or organism from one location to another.
- Attribution: [database_cross_reference: GOC:dgh]
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drag powered swimming
- URI: https://eol.org/schema/terms/drag_based_swimming
- Definition: Drag swimmers use a cyclic motion where they push water back in a power stroke, and return their limb forward in the return or recovery stroke. When they push water directly backwards, this moves their body forward, but as they return their limbs to the starting position, they push water forward, which will thus pull them back to some degree, and so opposes the direction that the body is heading. This opposing force is called drag. The return-stroke drag causes drag swimmers to employ different strategies than lift swimmers. Reducing drag on the return stroke is essential for optimizing efficiency.
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native range includes
- URI: http://eol.org/schema/terms/NativeRange
- Definition: Lists jurisdictions in which a given organism is a member of the undisturbed fauna or flora.
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United States
- URI: http://www.geonames.org/6252001
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population trend
- URI: http://eol.org/schema/terms/population_trend
- Definition: i.e., increasing, decreasing, stable, or unknown
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Unknown
trophic guild
- URI: http://eol.org/schema/terms/TrophicGuild
- Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
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scavenger
- URI: http://www.wikidata.org/entity/Q172867
- Definition: organism that feeds on dead animal and/or plant material
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used for
- URI: http://eol.org/schema/terms/Uses
- Definition: The uses of the organism or products derived from the organism.
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food
- URI: https://www.wikidata.org/entity/Q2095
- Definition: any substance consumed to provide nutritional support for the body
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visual system
- URI: http://purl.obolibrary.org/obo/UBERON_0002104
- Definition: The sensory system subserving the sense of vision.
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apposition eyes
- URI: http://purl.obolibrary.org/obo/IDOMAL_0002229
- Definition: A compound eye with no separation between the crystalline-cone layer and the retinula, each rhabdom receiving light only from its own corneal lens.
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Known occurrences, collected specimens and observations of Columbia River Signal Crayfish. View this species on GBIF

JC Schou cc-by-nc