Open the cage: Handling, not captivity, affects escape responses of Strongylocentrotus franciscanus to Pycnopodia helianthoides



The effects of handling and captivity of Strongylocentrotus franciscanus on its escape response to the predator Pycnopodia helianthoides were measured to see if they could affect organism survival following reintroduction into the wild. We collected 124 individuals of S. franciscanus and subjected them to 1 day, 2 day, 3 day and 4 day captivity treatments. Handling effects due to the tagging process were controlled for with 30 individuals.1 day, 2 day and handling control treatments exhibited significantly lower escape responses compared to wild control organisms (all p values<0.05). No effect of captivity time on escape responses was seen as handling controls did not differ from the captivity treatments. These results suggest that scientific facilities emphasize handling procedures rather than captivity time for animal reintroduction policies.

Author Biography

Daniel Emile Zayonc, Simon Fraser University

B.Sc Biological Sciences


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