Toft & Heerhartz 2015 juvenile salmon movement and shoreline armoring

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Heerhartz, S.M., Toft, J.D. Movement patterns and feeding behavior of juvenile salmon (Oncorhynchus spp.) along armored and unarmored estuarine shorelines. Environ Biol Fish 98, 1501–1511 (2015). https://doi.org/10.1007/s10641-015-0377-5

Notes

• Initial work in using GPS-supported snorkle surveys to directly observe juvenile fish behavior, with a focus on moment path straightness, and time spent moving vs. foraging. Effort compared armored vs. unarmored shorelines.
• Behavior metrics were not significantly affected by armored/unarmored sites, however more observations were made at unarmored sites, suggesting higher density.
• Variation in movement rate and straightness index were higher at unarmored sites, although the central tendency did not vary.
• A very high proportion of time was spent in feeding behavior (mean ~70%).