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A collaborative approach to investigate site fidelity, home range, and homing behavior of cabezon (Scorpaenichthys marmoratus)
- Mireles, Carlos, Nakamura, Royden, Wendt, Dean E.
- Fisheries research 2012 v.113 no.1 pp. 133-142
- Scorpaenichthys marmoratus, adults, coasts, conservation areas, fish, fisheries, geographic information systems, habitats, home range, philopatry, scientists, California
- Understanding the area use requirements of species targeted for protection by marine protected areas (MPAs) is critical to the future conservation efforts of economically important fish species. Knowledge of home range size and site fidelity is essential in determining whether species will benefit from the protection offered by a MPA, the size of the area needed to protect individuals, and the extent to which surrounding unprotected areas may be supplemented through post-recruitment movement or “spillover”. We utilized a traditional mark and recapture approach, along with GIS spatial analysis to investigate the site fidelity, home range, and homing behavior of the economically important fish species cabezon (Scorpaenichthys marmoratus) on the south central coast of California. In collaboration with members of the commercial live-fish fishery, a total of 1240 sub-adult and adult cabezon were tagged during 10 days of fishing from September to December of 2004 along ∼18km of coastline. A public awareness and reward program resulted in 330 total recaptures from 290 different individuals (23% recapture rate) with recaptured individuals at liberty up to 1000 days after initial tagging. A majority of individuals displayed high site fidelity, with 81% of recapture events occurring within 100m of their initial capture locations, and only 9 individuals (.03%) recaptured greater than 1km. Most individuals (64%) displayed home ranges less than 1000m². Ten individuals recaptured after experiencing translocation of up to 5.3km displayed strong homing behavior, returning to within 14m of their initial capture locations. Findings suggest that under circumstances where suitable habitat is available in nearby unprotected areas, that adult “spillover” will likely be limited to areas within 100m from MPA boundaries. In addition, the size of the area needed to protect individual cabezon, should be at least 1000m². Findings from this study demonstrate many of the potential benefits of scientists and fishers working together to investigate area use patterns of economically important fish species to facilitate future design and assessment of MPAs.