Divergent temperature-specific metabolic and feeding rates of native and invasive crayfish

Temperature is one of the most important factors governing the activity of ectothermic species, and it plays an important but less studied role in the manifestation of invasive species impacts. In this study, we investigated temperature-specific feeding and metabolic rates of invasive and native cra...

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Bibliographic Details
Published in:Biological invasions 2022-03, Vol.24 (3), p.787-799
Main Authors: Ruokonen, T. J., Karjalainen, J.
Format: Article
Language:English
Subjects:
Astacus astacus
Bioenergetics
Biomedical and Life Sciences
Crayfish
Developmental Biology
Divergence
Ecology
Feeding
Feeding rates
Food consumption
Freshwater & Marine Ecology
Indigenous species
Introduced species
Invasive species
Life Sciences
Low temperature
Metabolic rate
Metabolism
Modelling
Original Paper
Pacifastacus leniusculus
Plant Sciences
Predation
Seasonal variations
Temperature
Temperature gradients
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Summary:Temperature is one of the most important factors governing the activity of ectothermic species, and it plays an important but less studied role in the manifestation of invasive species impacts. In this study, we investigated temperature-specific feeding and metabolic rates of invasive and native crayfish, and evaluated how temperature regulates their ecological impacts at present and in future according to different climatic scenarios by bioenergetics modelling. We conducted a series of maximum food consumption experiments and measured the metabolic rates of cold-adapted native noble crayfish ( Astacus astacus ) and invasive signal crayfish ( Pacifastacus leniusculus ) originally from a warmer environment over a temperature gradient resembling natural temperatures in Finland. The maximum feeding rates and routine metabolic rates (RMR) of native noble crayfish were significantly higher at low temperatures (
ISSN:1387-3547
1573-1464
DOI:10.1007/s10530-021-02687-1