Columbia River Signal Crayfish vs Jaguar

Pacifastacus leniusculus compared with Panthera onca

Key Differences

• Columbia River Signal Crayfish is Not Evaluated while Jaguar is Near Threatened.

Taxonomic Classification

Rank	Columbia River Signal Crayfish	Jaguar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (artrópodos)	Chordata (cordados)
Class	Malacostraca (Crustaceans)	Mammalia (mamíferos)
Order	Decapoda (Decapoda)	Carnivora (carnívoros)
Family	Astacidae	Felidae (Cats)
Genus	Pacifastacus	Panthera (Big Cats)
Species	Pacifastacus leniusculus	Panthera onca

Evolutionary Relationship

Columbia River Signal Crayfish and Jaguar share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Columbia River Signal Crayfish

NE — Not Evaluated

Jaguar

NT — Near Threatened

Population: ~64.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Columbia River Signal Crayfish	Jaguar
Diet	—	Carnivore
Average Lifespan	—	15 years
Average Length	—	1.9 m
Average Weight	—	100.0 kg

Habitat & Geographic Range

Columbia River Signal Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Asia (Japan), Europe (26 countries), and North America (United States).

Jaguar

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 6 distinct biome types spanning the Neotropic and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Colombia, Ecuador, and Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Columbia River Signal Crayfish

<em>Pacifastacus leniusculus</em>, the Columbia River signal crayfish, is a freshwater crustacean in the family Astacidae native to the Pacific Northwest of North America and widely introduced across Europe, Japan, and other regions. This species has not been evaluated by the IUCN but is recognised as one of the most ecologically damaging invasive freshwater species in Europe, present in 26 European countries, Japan, and its native range in the United States. Signal crayfish are large, aggressive, and highly fecund, capable of displacing native crayfish species through competition and through transmission of crayfish plague, a disease caused by the oomycete <em>Aphanomyces astaci</em>, to which North American crayfish have evolved resistance but European species have not. This species inhabits a wide range of freshwater environments including rivers, streams, lakes, and estuaries, as well as adjacent terrestrial habitats. Signal crayfish are omnivores, consuming aquatic plants, invertebrates, fish eggs, and organic detritus, and their burrowing activity can destabilise stream banks and increase turbidity. Management of invasive populations is a major focus of freshwater conservation in Europe. Biological traits of this species remain poorly documented in the scientific literature.

Jaguar

El felino más grande de las Américas, alcanzando hasta 100 kg con una constitución robusta y musculosa y un pelaje con rosetas características. Se encuentra desde México hasta América del Sur, con núcleos poblacionales en el Amazonas y el Pantanal. Nadadores poderosos y depredadores apex, los jaguares desempeñan un papel fundamental en la regulación de las poblaciones de presas. Categorizado como Casi Amenazado, su área de distribución se contrae debido a la deforestación.