Round Island Field Report
We counted walrus (Odobenus rosmant~') at Round Island haul outs daily from May 06 through August 16, 2000. Counts for all East side beaches combined ranged from a low of 17 on June 7 to a high of 7,573 on August 8. Counts on West side beaches ranged from 0 on several days to a high of 1,612 on...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2000
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.5694 http://www.arlis.org/docs/vol1/RoundIsland/714160020-2000.pdf |
| Summary: | We counted walrus (Odobenus rosmant~') at Round Island haul outs daily from May 06 through August 16, 2000. Counts for all East side beaches combined ranged from a low of 17 on June 7 to a high of 7,573 on August 8. Counts on West side beaches ranged from 0 on several days to a high of 1,612 on July 30. The island-wide high count for the summer was 8,716 on August 8. We monitored seabird plots for productivity and population size. Common murre (Uria aaIge,) black-legged kittiwakes (Rissa tridactyla) and pelagic cormorants (Phalacrocorax pelagicus) fledged chicks of 24%, 26 % and 40 % respectively of the eggs laid. The number of common murre and black-legged kittiwakes increased slightly on each plot, while the number of pelagic cormorants decreased. We counted Steller sea lions (Eumetopias jubatas) at the East cape haulout at least once every six days. Counts of Steller sea lions ranged from a low of 14 on July 19, to a high of 378 on May 14. An average of 85 Steller sea lions used the East Cape haulout throughout the summer. We continued and expanded a study of raven (Corvus corax) predation upon seabirds. We also administered a visitor program, monitored haul out disturbance, and The summer of 2000 marked (he eighth consecutive year of a cooperative program between the |
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