Fleet responses to temporary closures for juvenile anchovy
Published:
Scientific question
How does the industrial purse-seine fleet respond to temporary spatial closures established to reduce the capture of juvenile anchovy, and what do those responses imply for management effectiveness?
Data
The project integrates fishing-set positions, catches, effort, vessel characteristics, juvenile incidence, closure boundaries and dates, fishing-season context, and environmental or operational covariates.
Methods
- Before–after and open–closed spatial comparisons.
- Redistribution of effort, catches, and fleet concentration.
- Distance-to-closure and displacement metrics.
- Hotspot, centre-of-gravity, and spatial-overlap analysis.
- Generalized and spatio-temporal models of fleet response.
- Evaluation of heterogeneity among vessel groups and fishing seasons.
Current status
Active methodological and manuscript-development project focused on temporary closures implemented in the north-central Peruvian anchovy fishery.
Expected outputs
- Scientific manuscript on operational fleet responses.
- Spatial indicators of displacement and concentration.
- Reproducible workflow for evaluating temporary fisheries closures.
- Evidence relevant to juvenile-protection measures and adaptive management.
Relevance
The project links management interventions with observed fleet behaviour, allowing the operational consequences and potential effectiveness of temporary closures to be evaluated quantitatively.