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Do Metabolic Traits, Vulnerability to Angling, or Capture Method Explain Boldness Variation in Eurasian Perch?
Physiological and Biochemical Zoology : PBZ
|October 9, 2018
Summary
The pace-of-life syndrome (POLS) concept was tested in Eurasian perch. Findings indicate no link between metabolic rate, boldness, and angling vulnerability, challenging POLS predictions in this species.
Area of Science:
- Behavioral Ecology
- Physiological Ecology
- Fisheries Science
Background:
- The pace-of-life syndrome (POLS) links metabolic rate to behavioral traits like boldness and activity.
- These traits may influence an individual's susceptibility to angling in fish populations.
- Eurasian perch (Perca fluviatilis) serve as a model species to investigate these ecological concepts.
Purpose of the Study:
- To test the predictions of the POLS concept in Eurasian perch.
- To determine if standard metabolic rate (SMR) and boldness are correlated.
- To assess the relationship between SMR, boldness, and angling vulnerability.
Main Methods:
- Quantified individual standard metabolic rate (SMR) and boldness in wild-caught and hatchery-reared Eurasian perch.
- Assessed angling vulnerability in hatchery-reared perch.
- Analyzed data from wild-caught perch subjected to ice fishing with different bait types.
Main Results:
- Standard metabolic rate (SMR) and boldness were found to be repeatable individual traits.
- No significant correlation was detected between SMR and boldness.
- No differences in SMR or boldness were observed between perch vulnerable or nonvulnerable to angling, nor related to bait type or capture order.
Conclusions:
- The study's findings do not support the pace-of-life syndrome (POLS) predictions regarding metabolic rate and boldness in Eurasian perch.
- Consistent with previous research, angling does not appear to exert selection pressure against boldness in this species.
- Individual variation in SMR and boldness may be influenced by factors other than those predicted by POLS.
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