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- Title
Euryhalinity and Geographical Origin Aid Global Alien Crayfish Invasions.
- Authors
Dobrzycka-Krahel, Aldona; Fidalgo, Maria Leonor
- Abstract
Salinity tolerance is a determinant of a narrow or wide distribution range of organisms. Crayfishes are important key species in many aquatic environments so require a better understanding of their ability to live in different saline regimes. We identified all alien crayfish and examined their habitats (freshwater and/or saline) and origins to test whether these factors predict their dispersal. We used contingency tables populated with raw frequency data with χ2—tests and assessed statistical significance at α of 0.05. We identified 21 alien crayfishes and we found that alien crayfish species were disproportionately freshwater (71%), with significantly lower proportions of euryhaline crayfishes inhabiting freshwater to saline environments (29%). Alien crayfishes also significantly disproportionally originate from America (67% of these taxa) when compared to all 'other' grouped regions (33%). In total, 36% of American crayfishes represent euryhaline species inhabiting freshwater to saline habitats against only 14% of crayfishes from all "other" grouped regions. This suggests that binomial euryhalinity/origin can help understand the potential of spread. We discussed obtained results with known experimental data on salinity tolerance, osmoregulation, growth, and reproduction of American alien crayfish. The paper will help in the management of crayfish spread.
- Subjects
AMERICA; CRAYFISH; STATISTICAL hypothesis testing; FRESHWATER habitats; CONTINGENCY tables; INTRODUCED species
- Publication
Water (20734441), 2023, Vol 15, Issue 3, p569
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w15030569