In collaboration with The Nature Conservancy, Nature Analytics has developed learning modules that introduce the fundamental concepts of Yield-Per-Recruit (YPR) and Spawning Potential Ratio (SPR) and their relevance in fisheries management. These modules are tailored for those who are new to fisheries science, providing a structured guide to this set of topics. Rather than delving into exhaustive detail, these modules focus on how YPR and SPR can inform decisions like setting size limits and conducting length-based stock assessments.
Tips for Effective Use
- Follow the Module Sequence: The modules are designed to be read in order, as each builds on the previous. We recommend starting from the beginning and progressing through the modules in order.
- Check Prerequisites: Some modules include a “Recommended Prerequisite” notice, indicating essential knowledge from earlier content. It’s advisable to review these prerequisites before moving forward.
Learning Modules
1. Yield-Per-Recruit Module
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2. Spawning Potential Ratio Module
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3. Growth Overfishing Module
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4. Recruitment Overfishing Module
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5. Life History Information Module
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6. Size Limits Module
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7. Setting Size Limits
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8. Multi-Species Size Limits
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9. Length Measurements
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Further Reading
For those interested in a more in-depth and technical exploration of YPR and SPR, we recommend the following publications:
- Haddon, M. (2001). Modelling and Quantitative Methods in Fisheries. Chapman & Hall/CRC, Florida, U.S.A.
- Quinn, T.J.I., & Deriso, R.B. (1999). Quantitative Fish Dynamics. Oxford University Press, New York, USA.
Collaborators
W. Harford, P. Moore, E. Ristig