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Título
Upstream movement capacity of invasive signal crayfish (Pacifastacus leniusculus) under different environmental and biometric factors
Autor
Año del Documento
2022
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Biology and Life Sciences Forum, 2022, Vol. 13, Nº. 1, 36
Résumé
The spread of invasive crayfish species is a major threat to endemic species worldwide. This threat affects native crayfish as well as flora and fauna species in general. In order to limit their dispersal, different methods have been used, the most promising of which are those related to physical barriers. For their design, it is essential to know the limits in the capacity of crayfish to move under different hydraulic scenarios, although to date, there are few studies on this topic. The present work analyzes the volitional upstream movement capacity of the signal crayfish (Pacifastacus leniusculus) in a laboratory open flume, with different configurations of environmental and hydraulic variables (bed roughness, flow velocity, water temperature, times of day) and accounting for the possible effect of biometric factors (carapace length, sex). Twenty-four different trials with five individuals per trial were carried out, tracking all crayfish movements individually by visual tags and with a video monitoring system. Data were analyzed using survival analysis techniques and parametric models were developed, considering as response variables the maximum distance traveled and the movement speed. The results showed that the combination of bed roughness and flow velocity were the best predictors to explain crayfish movement performance, with a flow velocity greater than 0.8 m/s together on a non-rough bed being the limiting factor; the water temperature and the sex also have a significant effect. This information can serve as a basis for the design of future barriers to the dispersal of invasive crayfish species in the Iberian Peninsula.
Materias (normalizadas)
Introduced organisms
Exotic animals
Especies exóticas invasoras
Especies exóticas invasoras - Control - España
Crayfish
Cangrejos de río
Freshwater biodiversity conservation
Diversidad de las especies
Fauna - Protección
Survival analysis (Biometry)
Análisis de supervivencia (Biometría)
Aquatic ecology
Ecología del agua dulce
Marine & Freshwater Sciences
Materias Unesco
3105 Peces y Fauna Silvestre
5102.08 Pesca
5902.08 Política del Medio Ambiente
ISSN
2673-9976
Revisión por pares
SI
Version del Editor
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Aparece en las colecciones
Fichier(s) constituant ce document
Tamaño:
211.3Ko
Formato:
Adobe PDF
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