New technology for an ancient fish: A lamprey life cycle modeling tool with an R Shiny application.

Area of Science:

• Ichthyology
• Conservation Biology
• Ecological Modeling

Background:

• Lampreys (Petromyzontiformes) represent an ancient fish lineage with intricate life cycles.
• Understanding lamprey population dynamics is crucial for effective conservation and management.

Purpose of the Study:

• To develop a flexible life cycle model with an R Shiny interface for simulating lamprey abundance across life stages.
• To provide a framework for integrating demographic data to address lamprey biology and conservation questions.

Main Methods:

• Construction of a life cycle model incorporating an R Shiny interactive web application.
• Application of global sensitivity analysis to identify key demographic parameters influencing population size.
• Case study utilizing the Pacific lamprey (Entosphenus tridentatus) to demonstrate model utility.

Main Results:

• The model effectively simulates lamprey abundance by life stage, allowing for exploration of demographic data.
• Sensitivity analysis revealed critical life stage parameters affecting overall population size and highlighted knowledge gaps.
• Example analyses demonstrated the model's applicability to management scenarios like dam passage and translocations.

Conclusions:

• The developed model offers a valuable tool for scientists and managers to explore lamprey biology and conservation issues.
• Simulations generated by the model can refine hypotheses and predictions for empirical testing.
• This interactive framework enhances capabilities for data-driven decision-making in lamprey conservation efforts.