RAPID CONSUMPTION OF KELP CRAB: IMPLICATIONS FOR SEA OTTERS IN WASHINGTON STATE

Johnson, Carter J; Hale, Jessica R; Tinker, M Tim; Foster, Erin U; Samhouri, Jameal F; Shelton, Andrew O; Laidre, Kristin L

doi:10.1898/nwn20-07

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RAPID CONSUMPTION OF KELP CRAB: IMPLICATIONS FOR SEA OTTERS IN WASHINGTON STATE

2023
By Johnson, Carter J ; Hale, Jessica R ; Tinker, M Tim ; ...
Source: Northwestern Naturalist, 104(1)

[PDF-937.03 KB]

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Journal Title:

Northwestern Naturalist
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Johnson, Carter J ; Hale, Jessica R ; Tinker, M Tim ; Foster, Erin U ; Samhouri, Jameal F ; ... More +

Johnson, Carter J ; Hale, Jessica R ; Tinker, M Tim ; Foster, Erin U ; Samhouri, Jameal F ; Shelton, Andrew O ; Laidre, Kristin L Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center) Less -
Description:

—As animal populations approach environmental carrying capacity, competition for food increases, generally leading to decreased individual energy intake rate. Energy-intake rate can therefore be used as one metric of population status relative to carrying capacity. Focal observations of Sea Otter ( Enhydra lutris ) foraging behavior have been used throughout their range to estimate energy-intake rates and infer population status. In Washington State, previous research hasdemonstrated that handling times for Kelp Crabs ( Pugettia spp.) by Sea Otters are 1.5 to 2 times faster than those observed in California and British Columbia, resulting in higher energy-intake rate estimates for Sea Otters in Washington. We investigated potential causes for the difference inhandling time by: (1) comparing Sea Otter handling times of Kelp Crab and non-Kelp Crab preyitems in Washington, California, and British Columbia; (2) comparing the handling times of Kelp
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General Earth And Planetary Sciences General Environmental Science
Source:

Northwestern Naturalist, 104(1)
DOI:

https://doi.org/10.1898/nwn20-07
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1051-1733
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PDF
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Northwestern Naturalist
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Journal Article
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urn:sha256:8590082e2044099dd63365bc24ed3c2c312098ec5a508b6a545424c0f452c8a9
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https://repository.library.noaa.gov/view/noaa/53569/noaa_53569_DS1.pdf
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RAPID CONSUMPTION OF KELP CRAB: IMPLICATIONS FOR SEA OTTERS IN WASHINGTON STATE

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